:tornado: NOAA Weather Alerts Tracker

Real-time severe weather warnings and alerts from the National Weather Service (NWS). Tracks tornadoes, hurricanes, floods, winter storms, heat advisories, and all active NWS alerts across the United States, updated continuously.

What data does it extract?

For each active weather alert, the Actor extracts:

Field	Description
Event	Alert type (Tornado Warning, Flood Watch, Winter Storm Warning, etc.)
Severity	Extreme, Severe, Moderate, Minor, or Unknown
Urgency	Immediate, Expected, Future, Past, or Unknown
Certainty	Observed, Likely, Possible, Unlikely, or Unknown
Area	Affected counties, zones, and regions
Headline	Short alert headline
Description	Full alert text with weather details
Instruction	Recommended protective actions
Onset/Expires	When the hazard begins and when the alert expires
Sender	Issuing NWS office

Output example

{
  "alertId": "urn:oid:2.49.0.1.840.0.1234567890",
  "event": "Tornado Warning",
  "severity": "Extreme",
  "urgency": "Immediate",
  "certainty": "Observed",
  "areaDesc": "Shelby County, TN; Fayette County, TN",
  "headline": "Tornado Warning issued for Shelby County, TN",
  "description": "The National Weather Service has issued a Tornado Warning for...",
  "instruction": "TAKE COVER NOW! Move to a basement or interior room on the lowest floor.",
  "onset": "2026-02-25T18:30:00-06:00",
  "expires": "2026-02-25T19:15:00-06:00",
  "ends": "2026-02-25T19:15:00-06:00",
  "senderName": "NWS Memphis TN",
  "category": "Met",
  "status": "Actual",
  "response": "Shelter",
  "scrapedAt": "2026-02-25T18:35:00.000Z",
  "sourceUrl": "https://api.weather.gov/alerts/active"
}

Input options

Parameter	Type	Description
states	string[]	Filter by US state codes (e.g., ["TX", "FL", "OK"]). Leave empty for all states.
severity	string	Filter by severity: Extreme, Severe, Moderate, Minor.
urgency	string	Filter by urgency: Immediate, Expected, Future.
certainty	string	Filter by certainty: Observed, Likely, Possible.
eventTypes	string[]	Filter by event type (e.g., ["Tornado Warning", "Flash Flood Warning"]).
maxRecords	integer	Maximum alerts to fetch. Default: 500.

Common alert types

Tornado Warning, Severe Thunderstorm Warning, Flash Flood Warning, Winter Storm Warning, Hurricane Warning, Heat Advisory, Wind Advisory, Freeze Warning, Dense Fog Advisory, Red Flag Warning, Tsunami Warning, and many more.

Use cases

• Emergency management agencies — Monitor severe weather threats in real time for response planning
• Insurance companies — Track active weather events for claims anticipation and risk assessment
• Logistics & transportation — Route around severe weather and plan for weather-related delays
• Agriculture — Monitor freeze warnings, heat advisories, and severe storms that affect crops
• News & media — Get real-time weather alert data for reporting and visualization
• Event planners — Check for weather warnings affecting outdoor event locations
• IoT & smart home apps — Integrate weather alerts into home automation and safety systems

Data freshness

The NWS updates alerts continuously as conditions change. Schedule this Actor to run every 15-60 minutes for real-time severe weather monitoring.

Cost

This Actor uses the NWS public API. Typical cost: less than $0.01 per run.