US severe weather (NWS, NHC, NWPS, FAA TFR)

CEV-OS / Data API / US severe weather (NWS, NHC, NWPS, FAA TFR)

CEV-OS Data API · last updated 2026-11-04. Status: live. Version 1.

Use this when you need current US severe-weather alerts, tropical storms, rivers in flood and FAA TFRs, reduced to state, region or zone (no coordinates or station IDs).

What it is

Mostly US: NWS Severe/Extreme alerts (zone text only), NHC active storms (name, classification, wind — no track), NOAA NWPS river gauges in flood (state + flood category, no gauge IDs) and FAA Temporary Flight Restrictions (state + kind). Not for navigation or flight planning.

Endpoints

REST: GET /v1/severe-weather on https://api.cev-os.com
Legacy host (same service): GET /v1/severe-weather on https://cev-os.com
MCP tool: get_severe_weather on https://mcp.cev-os.com/mcp

Parameters

Query parameters for `GET /v1/severe-weather`
Name	Type	Description	Constraints
`state`	string	Two-letter USPS state filter (also matches NWS zone text).	example FL; pattern ^[A-Za-z]{2}$

Example request

No account and no key. Query values below are the examples or defaults from the registry. An optional free key (header x-api-key) raises the limits; create one at https://cev-os.com/#api_keys after signing in with a verified email (Google sign-in is already verified).

curl -s "https://api.cev-os.com/v1/severe-weather?state=FL"

Example response

Every /v1 response is a JSON envelope (schema_version, product, timestamps, license, attribution, data). The registry example is the data member:

{
  "count": 2,
  "coverage": "Mostly US",
  "alerts": [
    {
      "source": "nws",
      "event": "Tornado Warning",
      "zone": "Miami-Dade",
      "state": "FL",
      "severity": "Extreme",
      "headline": "Tornado Warning for Miami-Dade"
    },
    {
      "source": "nhc",
      "name": "Pat",
      "classification": "Hurricane",
      "wind_kt": 90
    }
  ]
}

Update frequency

TRIPWIRE: NWS 5 min, NHC 30 min, NWPS 60 min, FAA TFR 30 min; Data API caches 3 min.

Public cache: 180 seconds (Cache-Control: public, max-age=180).

Sources, license and usage

License status: cleared. NWS, NHC, NWPS and FAA TFR are US Government works. Not for navigation or flight planning.

Underlying sources
Source	License	commercialOk	Terms
NOAA / National Weather Service alerts	US Government work (public domain)	true	—
NOAA / National Hurricane Center	US Government work (public domain)	true	—
NOAA National Water Prediction Service	US Government work (public domain)	true	—
FAA Temporary Flight Restrictions	US Government work (public domain). Not for flight planning or navigation.	true	—

Attribution (show this wherever you display the data):

NOAA / National Weather Service (https://www.weather.gov/).
NOAA / National Hurricane Center (https://www.nhc.noaa.gov/).
NOAA National Water Prediction Service (https://water.noaa.gov/).
FAA TFR list (https://tfr.faa.gov/). Not for navigation or flight planning.

Privacy class: public-derived. Access: public. Price: free (price is null; pay-per-call is not active).

Gaps

Mostly CONUS / US waters. Reduced to state, zone or storm name; no coordinates or station IDs.

Disclaimer

Not an official warning. Not for navigation, life-safety or flight planning. Follow NWS, NHC and the FAA.

Data API hub (all products, limits, license notes)
MCP Registry listing com.cev-os/data
OpenAPI 3.1
Machine product list: /v1/products

Reference data, not investment advice.