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API · /weatheralerts-api

US Weather Alerts API

healthy 3,716 Subscribers

Live United States weather alerts as an API, straight from the National Weather Service. Get every active severe-weather warning, watch and advisory — tornado warnings, flash-flood and river-flood warnings, severe thunderstorm, winter storm, blizzard, excessive-heat, hurricane, red-flag and dozens more — filtered by US state, by a latitude/longitude point, or by NWS forecast/county zone, and refine by severity (Extreme, Severe, Moderate, Minor), urgency or event type. Each alert carries the event name, severity, urgency and certainty, the headline, the affected areas, the full description and the official protective-action instructions, plus the effective, onset, expires and ends times. See how many alerts are active nationwide and broken down by state, resolve any location to its NWS office, forecast zone and county, browse the full list of alert event types, and look up terms in the NWS weather glossary. Perfect for weather dashboards and safety apps, emergency-notification systems, smart-home automations, Discord/Slack bots and travel tools. No accounts, no upstream key. Covers the United States; for forecasts use the Weather API.

#weather-alerts #nws #severe-weather #warnings #emergency #usa
api.oanor.com/weatheralerts-api
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Machine-readable spec so AI agents can integrate this API.

/api/weatheralerts-api/openapi.json
/api/weatheralerts-api/llms.txt

Discovery: GET /api/index.json lists every API.

API health

healthy
Uptime
100.00%
Server probes · 24h
Avg latency
189 ms
Server probes · 24h
Subscribers
3,716
active
Total calls
126
last 7 days
status Full status page → · 14 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

Free

  • 3,450 calls / month
  • 2 requests / second
  • Hard cap (429 above quota, no overage)
  • 3,450 calls/month
  • 2 req/sec
  • Active alerts, count, zones & glossary
  • No credit card
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Starter

€4.20 /month

  • 45,000 calls / month
  • 5 requests / second
  • Hard cap (429 above quota, no overage)
  • 45k calls/month
  • 5 req/sec
  • Point & severity filters
  • Email support
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Pro

€13.50 /month

  • 214,000 calls / month
  • 15 requests / second
  • Hard cap (429 above quota, no overage)
  • 214k calls/month
  • 15 req/sec
  • Weather & safety dashboards
  • Priority support
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Mega

€38.40 /month

  • 1,070,000 calls / month
  • 40 requests / second
  • Hard cap (429 above quota, no overage)
  • 1.07M calls/month
  • 40 req/sec
  • Alerting systems & bots
  • Dedicated SLA
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api.oanor.com/bls-api

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Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for US Weather Alerts API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call US Weather Alerts API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for US Weather Alerts API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does US Weather Alerts API cost?
US Weather Alerts API has a free tier with 100 calls / month. Paid plans start at €4.20 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is US Weather Alerts API GDPR-compliant?
All requests to US Weather Alerts API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Pick an endpoint from the list on the left to see its details and try it.

Code snippets

Sign up to get an API key, then call any path under your slug.

curl https://api.oanor.com/weatheralerts-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."
const res = await fetch("https://api.oanor.com/weatheralerts-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();
$ch = curl_init("https://api.oanor.com/weatheralerts-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);
import requests
r = requests.get(
    "https://api.oanor.com/weatheralerts-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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