NOAA Tides and Currents

Measured conclusion: Alive, not deep-tested. L2 outcome: not_attempted.

NOAA tides and currents: water levels, tide predictions, currents, met data, flooding, sun and moon

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "NOAA Tides and Currents": {
      "url": "https://perigeetides.com/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (26)

• noaa_get_water_levels read-only

  Get observed water levels from a NOAA tide station as a time series. Choose the interval: "6" = standard 6-minute observations (preliminary or verified, max 31 days per request), "1" = 1-minute preliminary data (max 4 days), "hourly" = verified hourly heights (max 1 year). Heights are relative to the requested datum (MLLW by default — the US nautical chart zero). Returns per record: t (timestamp in requested time zone), v (height), s (sigma), f (quality flags, decoded in output), q (p=preliminary, v=verified). Recent data is preliminary; verification takes days to weeks. Use for: "what is the water level right now" (date=latest), storm surge analysis, comparing observed vs predicted tide. Do NOT use for future tides — use noaa_get_tide_predictions.

  Parameters:

  • station (required) — string — Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_find_nearest_stations.
  • date — string — Shortcut window: "today" = midnight to now, "latest" = single most recent reading, "recent" = last 72 hours. Mutually exclusive with begin_date/end_date/range.
  • datum — string — Vertical reference datum for heights. MLLW is the standard chart datum for coastal stations. IGLD and LWD apply to Great Lakes stations ONLY; NAVD/CRD exist only at stations where computed. Check a station's supported datums with noaa_get_station_datums.
  • range — integer — Number of hours. With begin_date: hours forward. With end_date: hours back. Alone: hours back from now.
  • units — string — Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH systems.
  • end_date — string — End date/time. Same formats as begin_date.
  • interval — string — Observation interval: "6" = 6-minute (standard, 31-day max), "1" = 1-minute preliminary (4-day max), "hourly" = verified hourly heights (1-year max).
  • time_zone — string — Time zone for timestamps: gmt = UTC, lst = station local standard time (no DST), lst_ldt = station local time with DST. Note: daily_mean data requires lst.
  • begin_date — string — Start date/time. Formats: yyyyMMdd, "yyyyMMdd HH:mm", MM/dd/yyyy, or ISO yyyy-MM-dd[THH:mm].
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• noaa_get_water_level_summaries read-only

  Get verified summary water-level products from a NOAA station: - high_low: each day's observed highs/lows with ty = HH (higher high), H, L, LL (lower low). Max 1 year per request. - daily_mean: daily mean levels — GREAT LAKES STATIONS ONLY; NOAA requires local standard time, which this tool applies automatically. Max 10 years. - daily_max_min: daily maxima/minima from hourly and 6-minute data with completeness percentages. Max 10 years. - monthly_mean: monthly tidal datum means (columns MHHW, MHW, MSL, MTL, MLW, MLLW, DTL, GT, MN, DHQ, DLQ, HWI, LWI, highest, lowest). Max 200 years — ideal for long-term climatology. Use for: historical extremes, mixed-tide analysis (HH vs H), long-term averages. For raw time series use noaa_get_water_levels; for future tides use noaa_get_tide_predictions.

  Parameters:

  • station (required) — string — Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_find_nearest_stations.
  • product (required) — string — Summary product: high_low (daily tide extremes, 1yr max), daily_mean (Great Lakes only, 10yr), daily_max_min (10yr), monthly_mean (datum means, 200yr).
  • date — string — Shortcut window: "today" = midnight to now, "latest" = single most recent reading, "recent" = last 72 hours. Mutually exclusive with begin_date/end_date/range.
  • datum — string — Vertical reference datum for heights. MLLW is the standard chart datum for coastal stations. IGLD and LWD apply to Great Lakes stations ONLY; NAVD/CRD exist only at stations where computed. Check a station's supported datums with noaa_get_station_datums.
  • range — integer — Number of hours. With begin_date: hours forward. With end_date: hours back. Alone: hours back from now.
  • units — string — Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH systems.
  • end_date — string — End date/time. Same formats as begin_date.
  • time_zone — string — Time zone for timestamps: gmt = UTC, lst = station local standard time (no DST), lst_ldt = station local time with DST. Note: daily_mean data requires lst.
  • begin_date — string — Start date/time. Formats: yyyyMMdd, "yyyyMMdd HH:mm", MM/dd/yyyy, or ISO yyyy-MM-dd[THH:mm].
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• noaa_get_tide_predictions read-only

  Get NOAA harmonic tide predictions (future or past) for a station. interval="hilo" (recommended for "when is high/low tide") returns the daily tide events with type H/L — up to 10 years per request. Other intervals (h, 1, 5, 6, 10, 15, 30, 60 minutes) return a height time series — up to 1 year per request. Heights are relative to the requested datum (MLLW default). Notes: - Great Lakes stations have NO tide predictions (lake levels are not tidal). - Subordinate stations (type "S") only support interval=hilo; use the station's reference (R) station for interval series. - Predictions are astronomical only — they exclude weather effects (storm surge, wind setup). Compare with noaa_get_water_levels for actual conditions.

  Parameters:

  • station (required) — string — Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_find_nearest_stations.
  • date — string — Shortcut window: "today" = midnight to now, "latest" = single most recent reading, "recent" = last 72 hours. Mutually exclusive with begin_date/end_date/range.
  • datum — string — Vertical reference datum for heights. MLLW is the standard chart datum for coastal stations. IGLD and LWD apply to Great Lakes stations ONLY; NAVD/CRD exist only at stations where computed. Check a station's supported datums with noaa_get_station_datums.
  • range — integer — Number of hours. With begin_date: hours forward. With end_date: hours back. Alone: hours back from now.
  • units — string — Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH systems.
  • end_date — string — End date/time. Same formats as begin_date.
  • interval — string — "hilo" = high/low tide events only (max 10-year span). "h" = hourly, or 1/5/6/10/15/30/60-minute series (max 1-year span).
  • time_zone — string — Time zone for timestamps: gmt = UTC, lst = station local standard time (no DST), lst_ldt = station local time with DST. Note: daily_mean data requires lst.
  • begin_date — string — Start date/time. Formats: yyyyMMdd, "yyyyMMdd HH:mm", MM/dd/yyyy, or ISO yyyy-MM-dd[THH:mm].
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• noaa_get_currents read-only

  Get observed current speed and direction from a NOAA current meter station. Current stations use alphanumeric IDs (e.g. "cb0102" Chesapeake, "bh0101" Boston Harbor) — NOT the 7-digit water-level station IDs. Find them with noaa_search_stations (type "currents") or noaa_find_nearest_stations. UNITS WARNING: english = knots, but metric = cm/s (centimeters/second, not m/s). Returns per record: t (time), s (speed), d (direction, degrees true), b (bin number). Max 7 days per request. Set expand_detailed=true to include per-beam echo intensity and correlation diagnostics.

  Parameters:

  • station (required) — string — Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_find_nearest_stations.
  • bin — integer — Depth bin number (current meters measure at multiple depths). Find valid bins with noaa_get_station_info (expand ["bins"]). bin=0 returns ALL bins but caps the request at 7 days. Omit at single-bin stations.
  • date — string — Shortcut window: "today" = midnight to now, "latest" = single most recent reading, "recent" = last 72 hours. Mutually exclusive with begin_date/end_date/range.
  • range — integer — Number of hours. With begin_date: hours forward. With end_date: hours back. Alone: hours back from now.
  • units — string — Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH systems.
  • end_date — string — End date/time. Same formats as begin_date.
  • time_zone — string — Time zone for timestamps: gmt = UTC, lst = station local standard time (no DST), lst_ldt = station local time with DST. Note: daily_mean data requires lst.
  • begin_date — string — Start date/time. Formats: yyyyMMdd, "yyyyMMdd HH:mm", MM/dd/yyyy, or ISO yyyy-MM-dd[THH:mm].
  • expand_detailed — boolean — Include ADCP beam diagnostics (echo1-4, corr1-4) per record.
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• noaa_get_current_predictions read-only

  Get predicted tidal currents for a NOAA current prediction station. interval="max_slack" (recommended for navigation) returns the tidal-current events — maximum flood, maximum ebb, and slack water times — up to 1 year per request. Other intervals (h, 1, 6, 10, 30, 60 minutes) return a velocity time series — up to 31 days. UNITS WARNING: english = knots; metric = cm/s. vel_type="speed_dir" returns Speed/Direction pairs; "default" returns velocities projected on the flood/ebb axis (Velocity_Major: positive = flood direction, negative = ebb) with meanFloodDir/meanEbbDir. Subordinate (type "S") prediction stations derive from a reference station — see noaa_get_prediction_offsets.

  Parameters:

  • station (required) — string — Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_find_nearest_stations.
  • bin — integer — Depth bin number (current meters measure at multiple depths). Find valid bins with noaa_get_station_info (expand ["bins"]). bin=0 returns ALL bins but caps the request at 7 days. Omit at single-bin stations.
  • date — string — Shortcut window: "today" = midnight to now, "latest" = single most recent reading, "recent" = last 72 hours. Mutually exclusive with begin_date/end_date/range.
  • range — integer — Number of hours. With begin_date: hours forward. With end_date: hours back. Alone: hours back from now.
  • units — string — Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH systems.
  • end_date — string — End date/time. Same formats as begin_date.
  • interval — string — "max_slack" = max flood/ebb + slack events (1-year max span); h/1/6/10/30/60 = time series (31-day max span).
  • vel_type — string — "default" = flood/ebb-axis velocity (Velocity_Major signed: + flood, - ebb); "speed_dir" = speed and compass direction.
  • time_zone — string — Time zone for timestamps: gmt = UTC, lst = station local standard time (no DST), lst_ldt = station local time with DST. Note: daily_mean data requires lst.
  • begin_date — string — Start date/time. Formats: yyyyMMdd, "yyyyMMdd HH:mm", MM/dd/yyyy, or ISO yyyy-MM-dd[THH:mm].
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• noaa_get_meteorological_data read-only

  Get observed meteorological/oceanographic sensor data from a NOAA station. Products: air_temperature, water_temperature, wind (speed/gust/direction), air_pressure, air_gap (bridge clearance to water surface), conductivity, visibility, humidity, salinity. Units by system: temps °F/°C; wind knots (english) or m/s (metric); air_gap feet/meters; visibility nautical miles/kilometers; air_pressure always millibars; salinity always PSU. Max span ~31 days per request; interval "6" (6-minute, default) or "h" (hourly). Not every station has every sensor — check with noaa_get_station_info (expand ["sensors"]). Water-level data is served by noaa_get_water_levels, not this tool.

  Parameters:

  • station (required) — string — Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_find_nearest_stations.
  • product (required) — string — Sensor product to retrieve.
  • date — string — Shortcut window: "today" = midnight to now, "latest" = single most recent reading, "recent" = last 72 hours. Mutually exclusive with begin_date/end_date/range.
  • range — integer — Number of hours. With begin_date: hours forward. With end_date: hours back. Alone: hours back from now.
  • units — string — Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH systems.
  • end_date — string — End date/time. Same formats as begin_date.
  • interval — string — "6" = 6-minute observations (default), "h" = hourly.
  • time_zone — string — Time zone for timestamps: gmt = UTC, lst = station local standard time (no DST), lst_ldt = station local time with DST. Note: daily_mean data requires lst.
  • begin_date — string — Start date/time. Formats: yyyyMMdd, "yyyyMMdd HH:mm", MM/dd/yyyy, or ISO yyyy-MM-dd[THH:mm].
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• noaa_search_stations read-only

  Search the NOAA CO-OPS station directory by capability type, name, and/or state. Filter with: - type: what the station does (waterlevels, tidepredictions, currents, currentpredictions, met, ...) — pick the type matching the data you plan to request. - name: case-insensitive substring ("San Francisco", "Boston"). - state: two-letter code ("CA", "MA"). Returns id, name, location, tide type, Great Lakes flag, and for prediction stations whether they are reference (R, harmonic) or subordinate (S, offset-based — hilo predictions only). Results are paginated (limit/offset). For proximity search by coordinates use noaa_find_nearest_stations instead.

  Parameters:

  • name — string — Case-insensitive substring of the station name.
  • type — string — Station capability filter. Common: "waterlevels" (active water level), "tidepredictions", "currents" (observed currents), "currentpredictions", "met" (weather sensors). Full list via noaa_get_reference_guide topic "station_types".
  • limit — integer — Maximum stations to return.
  • state — string — Two-letter US state/territory code, e.g. "CA".
  • offset — integer — Pagination offset.
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• noaa_find_nearest_stations read-only

  Find the NOAA stations closest to a latitude/longitude point, sorted by distance. Use this to answer "what's the tide station near <place>?" — geocode the place to coordinates first, then call this. Filter by type to match the data you need (e.g. type "tidepredictions" before calling noaa_get_tide_predictions, "currents" before noaa_get_currents — current stations have different IDs than water-level stations). Distance is computed great-circle (Haversine) and reported in both km and miles. (NOAA's API has no native coordinate search; this tool maintains a cached station directory.)

  Parameters:

  • latitude (required) — number — Latitude in decimal degrees (-90 to 90).
  • longitude (required) — number — Longitude in decimal degrees (-180 to 180).
  • type — string — Station capability filter. Common: "waterlevels" (active water level), "tidepredictions", "currents" (observed currents), "currentpredictions", "met" (weather sensors). Full list via noaa_get_reference_guide topic "station_types".
  • limit — integer — Number of stations to return.
  • max_distance_km — number — Optional cutoff radius in kilometers.
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• noaa_get_station_info read-only

  Get a NOAA station's full metadata record: location, state, time zone, tide type, Great Lakes flag, capability flags, and links to available sub-resources. Optionally expand sub-resources inline via the "expand" list: - details (established/removed dates), sensors (installed instruments + elevations), floodlevels (NOS/NWS minor/moderate/major flood thresholds), benchmarks, products (available data page links), notices, disclaimers — for water-level stations - bins (ADCP depth bins), deployments — for current stations (alphanumeric IDs) Use this before requesting data to confirm what the station actually collects. For datum values use noaa_get_station_datums; for harmonic constituents use noaa_get_harmonic_constituents.

  Parameters:

  • station (required) — string — Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_find_nearest_stations.
  • units — string — Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH systems.
  • expand — array — Sub-resources to embed inline (availability varies by station type).
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• noaa_get_station_datums read-only

  Get the accepted tidal datum values for a station: the elevations of MHHW, MHW, MTL, MSL, DTL, MLW, MLLW, STND, NAVD88 (where computed), plus GT (great diurnal range), MN (mean range), LAT/HAT (lowest/highest astronomical tide), and the station's historical extreme min/max water levels with dates. epoch "current" returns the present National Tidal Datum Epoch (1983–2001) values; "superseded" returns the prior epoch's values (useful for historical comparisons — not all stations have one). All values share one reference zero (the station datum), so datum-to-datum conversion is subtraction: height_above_MLLW = height_above_MSL + (MSL − MLLW). Use this tool to (1) check which datums a station supports before requesting data, and (2) convert heights between datums.

  Parameters:

  • station (required) — string — Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_find_nearest_stations.
  • epoch — string — "current" = present NTDE (1983–2001); "superseded" = prior epoch values.
  • units — string — Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH systems.
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• noaa_get_harmonic_constituents read-only

  Get the harmonic constituents NOAA uses to compute tide or current predictions at a station — the amplitude, phase, and angular speed of each tidal constituent (M2, S2, N2, K1, O1, ...). For water-level stations: amplitude (feet/meters), phase_GMT and phase_local (degrees), speed (degrees/hour). For current stations (alphanumeric IDs) constituents are current ellipses (major/minor amplitudes and phases per depth bin — pass bin to filter). Use for: building custom tide computations, checking a station's dominant constituents (M2 amplitude indicates semidiurnal range), verifying whether a station is harmonically predicted at all. Only reference (R) stations have constituents — subordinate stations use offsets (noaa_get_prediction_offsets).

  Parameters:

  • station (required) — string — Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_find_nearest_stations.
  • bin — integer — For current stations: restrict to one depth bin.
  • units — string — Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH systems.
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• noaa_get_prediction_offsets read-only

  Get the offsets a subordinate (type "S") prediction station applies to its reference station's predictions. kind "tide": returns refStationId, time offsets for high/low tide (minutes), height offsets for high/low tide, and whether the height adjustment is a ratio (multiplied) or fixed value — this is how NOAA derives subordinate-station tide times from the reference harmonic station. kind "current": returns refStationId/bin, mean flood/ebb directions, and time adjustments (minutes) for max flood, slack-before-ebb, max ebb, slack-before-flood plus amplitude ratios. Note: current prediction offsets are indexed per bin — pass the station_bin_suffix ID form (e.g. "ACT0091_1") if the plain ID returns nothing. Reference (R) stations return empty/null offsets — they don't need any.

  Parameters:

  • station (required) — string — Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_find_nearest_stations.
  • kind — string — "tide" = tidepredoffsets; "current" = currentpredictionoffsets.
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• noaa_get_sea_level_trends read-only

  Get the long-term relative sea level trend at a NOAA station: trend and error (reported by NOAA in mm/yr or inches/decade — the payload's trendUnits field says which), the observation period (startDate/endDate), and seasonal amplitude. Relative sea level combines ocean rise AND local land movement (subsidence/uplift), so trends vary widely by station (e.g. strongly positive on the Gulf Coast, negative in Alaska). Requires a station with a long water-level record; omit station to list all (affil "US" or "Global" filters the network).

  Parameters:

  • affil — string — Network filter when listing multiple stations.
  • station — string — Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_find_nearest_stations.
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• noaa_get_sea_level_rise_projections read-only

  Get NOAA's Interagency Sea Level Rise Scenario projections for a station (from the 2022 technical report): projected relative sea level (meters or feet, see units field) per decade through 2150 under the chosen scenario. Scenarios: low, intermediate-low, intermediate, intermediate-high, high, extreme, or all. Use for coastal planning questions ("how much sea level rise is projected at X by 2050?"). Pair with noaa_get_sea_level_trends (observed) and noaa_get_high_tide_flooding (flooding impact).

  Parameters:

  • units — string — Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH systems.
  • station — string — Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_find_nearest_stations.
  • scenario — string — Emissions/rise scenario from the 2022 Interagency report.
  • projection_year — integer — Filter to a single decade year (e.g. 2050).
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• noaa_get_extreme_water_levels read-only

  Get NOAA's extreme water level exceedance statistics for a station: the annual exceedance probability levels (e.g. the 1%-annual-chance "100-year" level) and historical extreme events, computed from the station's verified record. Use for flood risk questions ("what water level has a 1% chance per year at X?"). Levels are relative to the station's datums for the 1983–2001 epoch. Only long-record stations have this product.

  Parameters:

  • station (required) — string — Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_find_nearest_stations.
  • units — string — Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH systems.
  • levelType — string — High extremes (default) or low.
  • extremeType — string — Extreme statistics basis: annual (default) or monthly extremes.
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• noaa_get_top_ten_water_levels read-only

  Get a station's highest recorded water levels: analysis "toptenwaterlevels" returns the ten highest events on record (with date, height, causal event name like "Great New England Hurricane", and category); "peakwaterlevels" returns peak event records (optionally filtered by year). Heights are relative to the requested datum (MHHW is typical for flood comparisons). Use for "what's the worst flooding ever recorded at X?".

  Parameters:

  • station (required) — string — Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_find_nearest_stations.
  • year — integer — For peakwaterlevels: filter to one year.
  • datum — string — Reference datum for reported heights (MHHW is standard for flood context).
  • units — string — Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH systems.
  • analysis — string — "toptenwaterlevels" = ten highest on record; "peakwaterlevels" = peak event records.
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• noaa_get_high_tide_flooding read-only

  Get NOAA high tide flooding (HTF, "nuisance"/"sunny day" flooding) statistics for a station. Reports: - daily: flood occurrence per day (REQUIRES start_date and end_date, YYYYMMDD) - monthly / seasonal / annual: counts of minor/moderate/major flood days per period (filter with year/month/season_months, or range = last N periods) - met_year_annual: counts by meteorological year (May–April) - annual_outlook: NOAA's projected flood-day outlook for the coming met year - projections: decadal flood-day projections through 2100 (filter by decade, flood_threshold) - record_days: record flood-day counts - likely_scenarios: likely decadal flooding scenarios - daily_likelihoods: day-by-day flood likelihood forecasts Use for: "how often does X flood?", trends in nuisance flooding, future flooding projections. Not all stations have HTF products — check the HTFhistorical flag via noaa_get_station_info.

  Parameters:

  • station (required) — string — Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_find_nearest_stations.
  • year — integer — Filter to a calendar year (monthly/seasonal/annual/record_days).
  • month — integer — Filter to a month (monthly report).
  • range — integer — Number of years to cover: with year (or met_year) set, returns year..year+range; without, returns the last N years.
  • decade — integer — Decade for projections/likely_scenarios (e.g. 2050).
  • report — string — Which HTF report to retrieve (see tool description).
  • end_date — string — YYYYMMDD — required for report "daily".
  • met_year — integer — Meteorological year (met_year_annual / annual_outlook).
  • start_date — string — YYYYMMDD — required for report "daily".
  • season_months — string — Season for the seasonal report (Dec-Jan-Feb, Mar-Apr-May, ...).
  • flood_threshold — string — Flood severity threshold for projections/likely_scenarios.
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• astro_get_moon_phase read-only

  Get the moon phase for a date (or each day of a date range if end_date is given): phase name (New Moon, Waxing Crescent, ...), illuminated fraction, age in days within the 29.53-day cycle, distance (km), apparent diameter (degrees), and waxing/waning. Tide context: spring tides (largest range) occur just after new and full moons; neap tides after quarter moons. Computed locally — no NOAA data involved.

  Parameters:

  • date — string — Date in YYYY-MM-DD format. Defaults to today.
  • end_date — Optional range end (YYYY-MM-DD): returns one entry per day from date through end_date.
  • latitude — number — Optional latitude for distance/diameter precision.
  • longitude — number — Longitude in decimal degrees (-180 to 180).
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• astro_get_next_moon_phase read-only

  Find the date(s) of the next occurrence(s) of a principal moon phase (New Moon, First Quarter, Full Moon, Last Quarter) from a starting date. Use for: "when is the next full moon?", planning around spring tides (which follow new/full moons by 1–2 days).

  Parameters:

  • phase (required) — string — Which principal phase to find.
  • date — string — Search start date (YYYY-MM-DD). Defaults to today.
  • count — integer — How many occurrences to return.
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• astro_get_sun_times read-only

  Get sunrise, sunset, solar noon, dawn/dusk (civil), nautical dawn/dusk, astronomical dawn/dusk, golden hour, and day length for a location and date (or each day of a range if end_date is given). Times are ISO UTC unless an IANA timezone is provided. At high latitudes some events may be null (e.g. no astronomical night in summer). Computed locally.

  Parameters:

  • latitude (required) — number — Latitude in decimal degrees (-90 to 90).
  • longitude (required) — number — Longitude in decimal degrees (-180 to 180).
  • date — string — Date in YYYY-MM-DD format. Defaults to today.
  • end_date — Optional range end: one entry per day.
  • timezone — string — IANA timezone for output times (e.g. "America/New_York"). Defaults to UTC ISO timestamps.
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• astro_get_sun_position read-only

  Get the sun's position for a date, time, and location: azimuth (degrees clockwise from north as rendered here), altitude above the horizon (degrees), plus approximate declination and right ascension. Use for: shadow/lighting analysis, solar exposure. Computed locally with suncalc; declination/RA are approximate.

  Parameters:

  • latitude (required) — number — Latitude in decimal degrees (-90 to 90).
  • longitude (required) — number — Longitude in decimal degrees (-180 to 180).
  • date — string — Date in YYYY-MM-DD format. Defaults to today.
  • time — string — Time of day (HH:MM[:SS], interpreted in the local runtime timezone). Defaults to now.
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• astro_get_next_sun_event read-only

  Find the next occurrence(s) of a sun event (sunrise, sunset, dawn, dusk, solarNoon, night, nightEnd, goldenHourStart, goldenHourEnd, nauticalDawn, nauticalDusk, astronomicalDawn, astronomicalDusk) at a location from a starting date. Use for: "when is sunset today?", planning golden-hour photography or dawn fishing around tide windows.

  Parameters:

  • event (required) — string — Sun event to find.
  • latitude (required) — number — Latitude in decimal degrees (-90 to 90).
  • longitude (required) — number — Longitude in decimal degrees (-180 to 180).
  • date — string — Search start date. Defaults to today.
  • count — integer — How many occurrences to return.
  • timezone — string — IANA timezone for output times (e.g. "America/New_York"). Defaults to UTC ISO timestamps.
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• nws_get_wind_forecast read-only

  Get the NWS hourly wind FORECAST (speed, gust, direction — plus wave height where the grid carries it) for a latitude/longitude. Data comes from the NWS forecast grid (api.weather.gov gridpoints — numeric NDFD values, not display strings). Horizon is up to ~7 days (156 hours), starting at the current hour. US and territories only. Wave height appears for marine/nearshore gridpoints; swell/period fields are typically only populated for open-ocean points. Units: english = knots and feet (default), metric = m/s and meters. Direction is degrees true, the direction the wind blows FROM. This is FORECAST data. For observed (measured) wind at a NOAA station right now, use noaa_get_meteorological_data (product "wind"). For the official marine text forecast (Coastal Waters Forecast narrative with small-craft advisories), use nws_get_marine_forecast.

  Parameters:

  • latitude (required) — number — Latitude in decimal degrees (-90 to 90).
  • longitude (required) — number — Longitude in decimal degrees (-180 to 180).
  • hours — integer — Forecast hours to return, starting at the current hour (max 156 ≈ 7 days; the grid may end sooner).
  • units — string — Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH systems.
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• nws_get_marine_forecast read-only

  Get the official NWS Coastal Waters Forecast (CWF) narrative for the marine zone covering a latitude/longitude — day-part wind/seas text ("SE winds 10 to 15 kt... Bay waters choppy"), including Small Craft Advisories. The point must lie in (or very near) US coastal waters; CWF zones extend roughly 20-60 NM offshore. Returns the zone's segment from the latest bulletin plus the office-wide synopsis. For numeric hourly wind values use nws_get_wind_forecast; for observed wind at a NOAA station use noaa_get_meteorological_data (product "wind").

  Parameters:

  • latitude (required) — number — Latitude in decimal degrees (-90 to 90).
  • longitude (required) — number — Longitude in decimal degrees (-180 to 180).
  • response_format — string — Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

  Hints: read-only yes · destructive no · idempotent yes · open-world yes

• noaa_get_reference_guide read-only

  Get curated reference documentation for NOAA CO-OPS concepts and parameters. Topics: - products: Every NOAA CO-OPS data product and which tool serves it - datums: Vertical datums (MLLW, MSL, IGLD...) and station applicability - units: What english vs metric means per measurement (incl. cm/s currents) - time_zones: gmt / lst / lst_ldt semantics and restrictions - intervals: Valid interval values per product family - station_types: Station type filters and station ID formats - data_limits: Maximum date-range span per product - quality_flags: Data quality fields (v/s/f/q), flag letters, HH/H/L/LL - date_formats: Accepted date formats and parameter combinations - marine_forecast: NWS wind & marine forecast tools vs CO-OPS observations Consult this before constructing unusual requests — especially "datums" (which vertical reference to use and station applicability), "units" (english/metric asymmetries like cm/s current speeds), and "data_limits" (maximum date spans per product).

  Parameters:

  • topic (required) — string — Reference topic to retrieve.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• perigee_whoami read-only

  Show how this MCP connection is authenticated: the Perigee account it is linked to (if any), how it signed in (OAuth connector or API key), its rate-limit tier, and the requests-per-minute limit. Use when the user asks which account they're connected as, why they're rate limited, or whether their sign-in worked.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

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