---
title: "Latest observation for an NWS station"
method: GET
path: "/api/v1/weather/nws/station/{station_id}/observation/latest"
tags: ["Environment"]
---

# Latest observation for an NWS station

`GET /api/v1/weather/nws/station/{station_id}/observation/latest`

Return the most recent observation reported by the requested NWS station. Surface ASOS sites report on a 5-minute cadence (METAR published at H:20, H:40, H:00); other station types vary. Each numeric measurement carries the WMO unit symbol and an NWS quality-control flag (`V` verified, `Z` preliminary, `C` coarse pass, etc.). The raw METAR string is also returned for clients that want to parse it themselves. Attribution: NOAA National Weather Service (api.weather.gov).

## Path parameters

- `station_id` string, required — NWS station identifier (e.g. `KJFK`, `KLWX`, `KDEN`).

## Response `200`

Latest observation plus raw METAR.

- EnvelopeNwsObservationLatestPayload
  - `data` NwsObservationLatestPayload, required — Single latest observation payload.
    - `station_id` string, nullable — Station identifier.
    - `timestamp` string, nullable — Observation time in ISO 8601 UTC.
    - `raw_message` string, nullable — Raw METAR string.
    - `text_description` string, nullable — Short human-readable sky condition (e.g. `Mostly Clear`).
    - `icon` string, nullable — NWS icon URL.
    - `temperature` NwsMeasurement, required — A single quantitative measurement with unit + QC flag. Mirrors the NWS `{value, unitCode, qualityControl}` triplet with unit codes translated to short human-readable symbols (e.g. `degC`, `m/s`).
      - `value` number, nullable — Numeric value of the measurement, or null when missing upstream.
      - `unit` string, nullable — Short unit symbol translated from the upstream WMO unit URI (e.g. `degC`, `km/h`, `Pa`, `%`).
      - `quality_control` string, nullable — NWS QC flag. `V` verified, `Z` preliminary (no QC), `C` coarse pass, `S` subjective good, `G` subjective questionable, `B` subjective bad.
    - `dewpoint` NwsMeasurement, required — A single quantitative measurement with unit + QC flag. Mirrors the NWS `{value, unitCode, qualityControl}` triplet with unit codes translated to short human-readable symbols (e.g. `degC`, `m/s`).
      - `value` number, nullable — Numeric value of the measurement, or null when missing upstream.
      - `unit` string, nullable — Short unit symbol translated from the upstream WMO unit URI (e.g. `degC`, `km/h`, `Pa`, `%`).
      - `quality_control` string, nullable — NWS QC flag. `V` verified, `Z` preliminary (no QC), `C` coarse pass, `S` subjective good, `G` subjective questionable, `B` subjective bad.
    - `wind_direction` NwsMeasurement, required — A single quantitative measurement with unit + QC flag. Mirrors the NWS `{value, unitCode, qualityControl}` triplet with unit codes translated to short human-readable symbols (e.g. `degC`, `m/s`).
      - `value` number, nullable — Numeric value of the measurement, or null when missing upstream.
      - `unit` string, nullable — Short unit symbol translated from the upstream WMO unit URI (e.g. `degC`, `km/h`, `Pa`, `%`).
      - `quality_control` string, nullable — NWS QC flag. `V` verified, `Z` preliminary (no QC), `C` coarse pass, `S` subjective good, `G` subjective questionable, `B` subjective bad.
    - `wind_speed` NwsMeasurement, required — A single quantitative measurement with unit + QC flag. Mirrors the NWS `{value, unitCode, qualityControl}` triplet with unit codes translated to short human-readable symbols (e.g. `degC`, `m/s`).
      - `value` number, nullable — Numeric value of the measurement, or null when missing upstream.
      - `unit` string, nullable — Short unit symbol translated from the upstream WMO unit URI (e.g. `degC`, `km/h`, `Pa`, `%`).
      - `quality_control` string, nullable — NWS QC flag. `V` verified, `Z` preliminary (no QC), `C` coarse pass, `S` subjective good, `G` subjective questionable, `B` subjective bad.
    - `wind_gust` NwsMeasurement, required — A single quantitative measurement with unit + QC flag. Mirrors the NWS `{value, unitCode, qualityControl}` triplet with unit codes translated to short human-readable symbols (e.g. `degC`, `m/s`).
      - `value` number, nullable — Numeric value of the measurement, or null when missing upstream.
      - `unit` string, nullable — Short unit symbol translated from the upstream WMO unit URI (e.g. `degC`, `km/h`, `Pa`, `%`).
      - `quality_control` string, nullable — NWS QC flag. `V` verified, `Z` preliminary (no QC), `C` coarse pass, `S` subjective good, `G` subjective questionable, `B` subjective bad.
    - `barometric_pressure` NwsMeasurement, required — A single quantitative measurement with unit + QC flag. Mirrors the NWS `{value, unitCode, qualityControl}` triplet with unit codes translated to short human-readable symbols (e.g. `degC`, `m/s`).
      - `value` number, nullable — Numeric value of the measurement, or null when missing upstream.
      - `unit` string, nullable — Short unit symbol translated from the upstream WMO unit URI (e.g. `degC`, `km/h`, `Pa`, `%`).
      - `quality_control` string, nullable — NWS QC flag. `V` verified, `Z` preliminary (no QC), `C` coarse pass, `S` subjective good, `G` subjective questionable, `B` subjective bad.
    - `sea_level_pressure` NwsMeasurement, required — A single quantitative measurement with unit + QC flag. Mirrors the NWS `{value, unitCode, qualityControl}` triplet with unit codes translated to short human-readable symbols (e.g. `degC`, `m/s`).
      - `value` number, nullable — Numeric value of the measurement, or null when missing upstream.
      - `unit` string, nullable — Short unit symbol translated from the upstream WMO unit URI (e.g. `degC`, `km/h`, `Pa`, `%`).
      - `quality_control` string, nullable — NWS QC flag. `V` verified, `Z` preliminary (no QC), `C` coarse pass, `S` subjective good, `G` subjective questionable, `B` subjective bad.
    - `visibility` NwsMeasurement, required — A single quantitative measurement with unit + QC flag. Mirrors the NWS `{value, unitCode, qualityControl}` triplet with unit codes translated to short human-readable symbols (e.g. `degC`, `m/s`).
      - `value` number, nullable — Numeric value of the measurement, or null when missing upstream.
      - `unit` string, nullable — Short unit symbol translated from the upstream WMO unit URI (e.g. `degC`, `km/h`, `Pa`, `%`).
      - `quality_control` string, nullable — NWS QC flag. `V` verified, `Z` preliminary (no QC), `C` coarse pass, `S` subjective good, `G` subjective questionable, `B` subjective bad.
    - `max_temperature_last_24h` NwsMeasurement, required — A single quantitative measurement with unit + QC flag. Mirrors the NWS `{value, unitCode, qualityControl}` triplet with unit codes translated to short human-readable symbols (e.g. `degC`, `m/s`).
      - `value` number, nullable — Numeric value of the measurement, or null when missing upstream.
      - `unit` string, nullable — Short unit symbol translated from the upstream WMO unit URI (e.g. `degC`, `km/h`, `Pa`, `%`).
      - `quality_control` string, nullable — NWS QC flag. `V` verified, `Z` preliminary (no QC), `C` coarse pass, `S` subjective good, `G` subjective questionable, `B` subjective bad.
    - `min_temperature_last_24h` NwsMeasurement, required — A single quantitative measurement with unit + QC flag. Mirrors the NWS `{value, unitCode, qualityControl}` triplet with unit codes translated to short human-readable symbols (e.g. `degC`, `m/s`).
      - `value` number, nullable — Numeric value of the measurement, or null when missing upstream.
      - `unit` string, nullable — Short unit symbol translated from the upstream WMO unit URI (e.g. `degC`, `km/h`, `Pa`, `%`).
      - `quality_control` string, nullable — NWS QC flag. `V` verified, `Z` preliminary (no QC), `C` coarse pass, `S` subjective good, `G` subjective questionable, `B` subjective bad.
    - `precipitation_last_hour` NwsMeasurement, required — A single quantitative measurement with unit + QC flag. Mirrors the NWS `{value, unitCode, qualityControl}` triplet with unit codes translated to short human-readable symbols (e.g. `degC`, `m/s`).
      - `value` number, nullable — Numeric value of the measurement, or null when missing upstream.
      - `unit` string, nullable — Short unit symbol translated from the upstream WMO unit URI (e.g. `degC`, `km/h`, `Pa`, `%`).
      - `quality_control` string, nullable — NWS QC flag. `V` verified, `Z` preliminary (no QC), `C` coarse pass, `S` subjective good, `G` subjective questionable, `B` subjective bad.
    - `precipitation_last_3h` NwsMeasurement, required — A single quantitative measurement with unit + QC flag. Mirrors the NWS `{value, unitCode, qualityControl}` triplet with unit codes translated to short human-readable symbols (e.g. `degC`, `m/s`).
      - `value` number, nullable — Numeric value of the measurement, or null when missing upstream.
      - `unit` string, nullable — Short unit symbol translated from the upstream WMO unit URI (e.g. `degC`, `km/h`, `Pa`, `%`).
      - `quality_control` string, nullable — NWS QC flag. `V` verified, `Z` preliminary (no QC), `C` coarse pass, `S` subjective good, `G` subjective questionable, `B` subjective bad.
    - `precipitation_last_6h` NwsMeasurement, required — A single quantitative measurement with unit + QC flag. Mirrors the NWS `{value, unitCode, qualityControl}` triplet with unit codes translated to short human-readable symbols (e.g. `degC`, `m/s`).
      - `value` number, nullable — Numeric value of the measurement, or null when missing upstream.
      - `unit` string, nullable — Short unit symbol translated from the upstream WMO unit URI (e.g. `degC`, `km/h`, `Pa`, `%`).
      - `quality_control` string, nullable — NWS QC flag. `V` verified, `Z` preliminary (no QC), `C` coarse pass, `S` subjective good, `G` subjective questionable, `B` subjective bad.
    - `relative_humidity` NwsMeasurement, required — A single quantitative measurement with unit + QC flag. Mirrors the NWS `{value, unitCode, qualityControl}` triplet with unit codes translated to short human-readable symbols (e.g. `degC`, `m/s`).
      - `value` number, nullable — Numeric value of the measurement, or null when missing upstream.
      - `unit` string, nullable — Short unit symbol translated from the upstream WMO unit URI (e.g. `degC`, `km/h`, `Pa`, `%`).
      - `quality_control` string, nullable — NWS QC flag. `V` verified, `Z` preliminary (no QC), `C` coarse pass, `S` subjective good, `G` subjective questionable, `B` subjective bad.
    - `wind_chill` NwsMeasurement, required — A single quantitative measurement with unit + QC flag. Mirrors the NWS `{value, unitCode, qualityControl}` triplet with unit codes translated to short human-readable symbols (e.g. `degC`, `m/s`).
      - `value` number, nullable — Numeric value of the measurement, or null when missing upstream.
      - `unit` string, nullable — Short unit symbol translated from the upstream WMO unit URI (e.g. `degC`, `km/h`, `Pa`, `%`).
      - `quality_control` string, nullable — NWS QC flag. `V` verified, `Z` preliminary (no QC), `C` coarse pass, `S` subjective good, `G` subjective questionable, `B` subjective bad.
    - `heat_index` NwsMeasurement, required — A single quantitative measurement with unit + QC flag. Mirrors the NWS `{value, unitCode, qualityControl}` triplet with unit codes translated to short human-readable symbols (e.g. `degC`, `m/s`).
      - `value` number, nullable — Numeric value of the measurement, or null when missing upstream.
      - `unit` string, nullable — Short unit symbol translated from the upstream WMO unit URI (e.g. `degC`, `km/h`, `Pa`, `%`).
      - `quality_control` string, nullable — NWS QC flag. `V` verified, `Z` preliminary (no QC), `C` coarse pass, `S` subjective good, `G` subjective questionable, `B` subjective bad.
    - `cloud_layers` NwsCloudLayer[], required — Reported cloud layers, lowest base first.
      - `amount` string, nullable — METAR cloud amount code: SKC, CLR, FEW, SCT, BKN, OVC.
      - `base_m` number, nullable — Cloud base altitude in metres above ground level.
  - `meta` SugraMeta, required — Metadata attached to every /api/v1/* response envelope.
    - `endpoint` string, required — Requested endpoint path.
    - `data_time` string, required — ISO 8601 UTC timestamp of the source data, not of the request.
    - `response_time` string, required — ISO 8601 UTC timestamp when this response was produced.
    - `provider` string, required — API name and version.
    - `source` string, nullable — Identifier of the primary upstream source used for this response.
    - `attribution` string, nullable — Human-readable attribution mandated by an upstream source (e.g. a securities regulator or self-regulatory organization). Present only on responses whose source requires the owner and source to be clearly identified. Do not remove or alter it when using the response.
    - `fallback_used` boolean, nullable — True when the primary source failed and a fallback produced the data.
    - `fallback_chain` string[], nullable — Ordered list of sources attempted, in the order they were tried.
    - `cached` boolean, nullable — True when this response was served from the internal cache.
    - `stale` boolean, nullable — True when the cached response was returned after the upstream rate-limited or errored. Clients can use this to detect degraded data.

## Other responses

- `401` — Missing or invalid `x-api-key` header. JSON body with a stable `code` distinguishing `missing_api_key` (no header sent) from `invalid_api_key` (header sent, key not accepted); any other 401 source carries the generic `unauthorized` with its detail as `reason`. Plus `hint`. `plan` is always null on 401 - an unauthenticated request has no plan; quota exhaustion is 429, not 401.
- `422` — Validation Error
- `429` — Daily rate limit exceeded. Check `X-RateLimit-Reset` for the next window.
- `503` — Upstream source is temporarily unavailable. Retry after a short delay.

---

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