United States Severe Weather Alerts
Live storm, flood, fire and heat warnings issued across the United States.
Active public weather alerts issued by the U.S. National Weather Service, including tornado, hurricane, flood, winter storm, red flag and extreme heat warnings. Each alert carries the event type, affected area description, severity, urgency, certainty and the time window it applies to. Logistics platforms, insurers, field-service schedulers and operations agents use it to reroute work and warn staff before conditions hit.
Source: National Weather Service API (NOAA) · Public Domain (U.S. Government work, 17 U.S.C. 105) · Source: NOAA / National Weather Service, api.weather.gov.
Endpoints
Every request is authenticated with your X-API-Key and counted against your plan.
- GET /v1/data/united-states-severe-weather-alerts
- GET /v1/data/united-states-severe-weather-alerts/search?q=...
- GET /v1/data/united-states-severe-weather-alerts/{key}
Base path /v1/data/united-states-severe-weather-alerts · full reference in the interactive docs. Also exposed as an MCP tool for AI agents.
Fields
| Field | Type | Description |
|---|---|---|
| alert_id | str | Unique National Weather Service alert identifier |
| event | str | Alert type, e.g. Tornado Warning or Flood Watch |
| headline | str | One-line human readable headline for the alert |
| area_description | str | Counties, zones or regions covered by the alert |
| severity | str | Extreme, Severe, Moderate, Minor or Unknown |
| urgency | str | Immediate, Expected, Future, Past or Unknown |
| certainty | str | Observed, Likely, Possible, Unlikely or Unknown |
| status | str | Actual, Exercise, Test or Draft |
| message_type | str | Alert, Update or Cancel |
| sender_name | str | Issuing weather forecast office |
| effective_at | date | When the alert takes effect |
| expires_at | date | When the alert expires |
What you get
FAQ
- Is this real-time?
- Alerts are refreshed from the National Weather Service feed on our ingest schedule. For life-safety decisions always confirm against the official NWS source.
- Does it include map geometry?
- No. This API serves the flat alert attributes. Affected areas are given as text in area_description rather than polygons.
- Does it cover countries outside the US?
- No. Coverage is the United States and its territories, as issued by NOAA.
Pricing
Simple, transparent pricing
Start free, upgrade when you need more. All plans include full API access.
Free
Get started and explore the API
- 100 API requests per day
- All endpoints included
- Community support
Pro
For production apps and AI agents
- 10,000 API requests per day
- All endpoints included
- Priority support
- Usage dashboard
Enterprise
Unlimited access for high-volume use
- Unlimited API requests
- All endpoints included
- Priority support
- Usage dashboard
- Dedicated support channel
Getting Started
Start building in minutes
Register for a free API key, make your first request, and upgrade when you're ready.
Register
Create an account to get your API key. It's free — no credit card required.
curl -X POST https://api.aristocles.com.au/v1/auth/register \
-H "Content-Type: application/json" \
-d '{"email": "you@example.com", "name": "Your Name"}'Make a request
Use your API key in the X-API-Key header to authenticate requests.
curl https://api.aristocles.com.au/v1/data/asx \
-H "X-API-Key: your_api_key_here"Upgrade
Need more requests? Upgrade to Pro or Enterprise — you'll be redirected to Stripe Checkout.
curl -X POST "https://api.aristocles.com.au/v1/billing/checkout?tier=pro" \
-H "X-API-Key: your_api_key_here"Check usage
Monitor your daily request count and remaining quota at any time.
curl https://api.aristocles.com.au/v1/usage \
-H "X-API-Key: your_api_key_here"