US Weather Alerts: NWS Warnings, Watches & Advisories

Get every active NWS weather alert for a US state: event (tornado warning, flood advisory...), severity, urgency, certainty, headline, affected areas, onset/expiry times, description and safety instructions. Free official weather.gov API, no key, public data. For alert bots, logistics, insurance.

What does US Weather Alerts do?

Active National Weather Service warnings, watches and advisories for any US state or marine zone.

What can you use it for?

• Send severe-weather notifications to Slack or email with a scheduled run.
• Monitor flood, fire and winter storm warnings across your store or warehouse locations.
• Feed live hazard alerts into logistics, insurance or field-service dashboards.
• Archive NWS alerts for a state over time for research.

Why use this Actor?

• Fast and cheap: lightweight HTTP-based Actor with no browser, so runs finish in seconds and cost very little.
• No API keys or accounts needed for the data source (see notes below).
• Clean, structured JSON that you can export as CSV, Excel, JSON or XML, or pull through the Apify API and integrations.
• Scheduling, webhooks and integrations: run it daily and send results to Google Sheets, Slack, Zapier, Make, n8n or your own API.

Input

Configure the run in the Input tab (all fields have sensible defaults).

Field	Type	Required	Default	Description
area	string	yes	-	2-letter US state, territory or marine area code, e.g. TX, CA, FL.
severity	string (Extreme / Severe / Moderate / Minor / Unknown)	no	-	Only return alerts of this severity.
event	string	no	-	Exact NWS event name, e.g. Tornado Warning, Flood Advisory, Red Flag Warning.
maxResults	integer	no	100	Maximum number of alerts.

Example input

{
  "area": "TX",
  "maxResults": 50
}

Output

Results are stored in the default dataset. Download them from the Output tab or via the API.

Example result

{
  "id": "urn:oid:2.49.0.1.840.0.6f4394b6a249014254b09a983a5bb047d3247501.001.1",
  "event": "Flood Warning",
  "severity": "Severe",
  "urgency": "Immediate",
  "certainty": "Observed",
  "headline": "Flood Warning issued October 16 at 2:25PM CDT until October 20 at 3:15AM CDT by NWS Norman OK",
  "areaDesc": "Wichita, TX; Wilbarger, TX",
  "sent": "2026-10-16T14:25:00-05:00",
  "onset": "2026-10-18T01:00:00-05:00",
  "expires": "2026-10-17T02:30:00-05:00",
  "ends": "2026-10-20T03:15:00-05:00",
  "senderName": "NWS Norman OK",
  "messageType": "Update",
  "response": "Avoid",
  "description": "...The Flood Warning is extended for the following rivers in Texas... Beaver Creek near Electra affecting Wilbarger and Wichita Counties. * WHAT...Minor floo...",
  "instruction": "Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov. The ne...",
  "zoneCodes": "TXC485, TXC487",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.6f4394b6a249014254b09a983a5bb047d3247501.001.1",
  "license": "U.S. Government Work - public domain (NOAA National Weather Service)",
  "scrapedAt": "2026-10-16T20:40:27.927Z"
}

Output fields

Field	Type	Example
id	string	"urn:oid:2.49.0.1.840.0.6f4394b6a249014254b09a983a5bb047d...
event	string	"Flood Warning"
severity	string	"Severe"
urgency	string	"Immediate"
certainty	string	"Observed"
headline	string	"Flood Warning issued October 16 at 2:25PM CDT until Octo...
areaDesc	string	"Wichita, TX; Wilbarger, TX"
sent	string	"2026-10-16T14:25:00-05:00"
onset	string	"2026-10-18T01:00:00-05:00"
expires	string	"2026-10-17T02:30:00-05:00"
ends	string	"2026-10-20T03:15:00-05:00"
senderName	string	"NWS Norman OK"
messageType	string	"Update"
response	string	"Avoid"
description	string	"...The Flood Warning is extended for the following river...
instruction	string	"Turn around, don't drown when encountering flooded roads...
zoneCodes	string	"TXC485, TXC487"
url	string	"https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.6f...
license	string	"U.S. Government Work - public domain (NOAA National Weat...
scrapedAt	string	"2026-10-16T20:40:27.927Z"

How much does it cost?

The Actor is billed by Apify according to the pricing shown on the Pricing tab of this page. Runs are small and fast, and the Apify Free plan includes monthly platform credits so you can try it at no cost. You can set a maximum cost per run, and the Actor stops cleanly when that limit is reached.

Notes and limitations

• Only currently active alerts are returned; expired alerts drop out of the feed automatically.
• Use a 2-letter US state or territory code (TX, CA, FL, PR...) or a marine area code (e.g. GM for Gulf of Mexico).

Tips

• Start with a small test run, then scale up the input.
• Use Schedules to automate recurring runs and Webhooks or Integrations to deliver the data where you need it.
• Call the Actor from your code with the Apify API or the official JavaScript and Python clients.

FAQ

What do severity and urgency mean?

Severity is Extreme, Severe, Moderate, Minor or Unknown; urgency is Immediate, Expected, Future, Past or Unknown, following the CAP alert standard.

How fresh is the data?

Live: the National Weather Service publishes alerts to this API within seconds of issuing them.

Feedback

Found a bug or need an extra field? Open an issue from the Issues tab of this Actor and it will be looked at quickly.

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