NOAA NWS / Event history

Red Flag Warning issued October 22 at 11:31AM MDT until October 23 at 8:00PM MDT by NWS Riverton WY

Red Flag Warning · Johnson County/Casper BLM. Severe; likely; urgency: expected.

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Bulletin issued: 22 October 2026 at 17:31 UTC
First saved by us: 22 October 2026 at 17:42 UTC
Last included in a daily record: 22 October 2026
The linked daily edition preserves what we captured that UTC day; this event page is not a live warning.
Source classification: Severe · Source alert

A recent feed check does not mean a new observation. This page preserves source records; it does not establish current safety or warning status.

Issuer / area: NWS Riverton WY · Johnson County/Casper BLM
Certainty / urgency: Likely / Expected
Message expiry (not hazard end): 23 October 2026 at 13:00 UTC
Forecast onset / end: 23 October 2026 at 18:00 UTC / 24 October 2026 at 02:00 UTC

Archived official description

The National Weather Service in Riverton has issued a Red Flag Warning, which is in effect from noon to 8 PM MDT Friday. * IMPACTS: Low Humidities...Strong Gusty Winds...and Wind Shift with a Cold Front could cause erratic fire behavior. * AFFECTED AREA: In North Central WY...Fire Weather Zone 281. * COUNTIES AFFECTED: In North Central WY...Johnson. * COLD FRONT: Moves in after 8 PM MDT Friday, with northerly 20 to 35 mph winds and gusts of 35 to 40 mph. * WIND: Southwest 25 to 35 mph with gusts up to 50 mph. * HUMIDITY: As low as 20 percent.

Instructions in this archived message

A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.

The saved record

What changed

0 updates · 1 first record

Each update compares two versions we saved. This may not include every update from the source. A missing report does not mean an event has ended.

First saved record · 22 October 2026 at 17:42 UTC

Saved by us

22 October 2026 at 17:42 UTC

Starting point

First saved record

Our first saved version of Red Flag Warning issued October 22 at 11:31AM MDT until October 23 at 8:00PM MDT by NWS Riverton WY. We have no earlier saved version to compare.

Bulletin issued: 22 October 2026 at 17:31 UTC

View saved version 1

Original saved fields, unchanged. This is our record, not an archived copy of the external webpage.

{
  "id": "nws:7fcf8672d903ff64a9b3f7d3",
  "authorityId": "urn:oid:2.49.0.1.840.0.df4580455977900e0a0e8e0a209e72dc934daefd.001.1",
  "sender": "w-nws.webmaster@noaa.gov",
  "references": [],
  "category": "weather",
  "title": "Red Flag Warning issued October 22 at 11:31AM MDT until October 23 at 8:00PM MDT by NWS Riverton WY",
  "eventType": "Red Flag Warning",
  "occurredAt": "2026-10-22T17:31:00.000Z",
  "issuedAt": "2026-10-22T17:31:00.000Z",
  "timeBasis": "Bulletin issued",
  "effectiveAt": "2026-10-22T17:31:00.000Z",
  "onsetAt": "2026-10-23T18:00:00.000Z",
  "expiresAt": "2026-10-23T13:00:00.000Z",
  "forecastEndAt": "2026-10-24T02:00:00.000Z",
  "severity": "Severe",
  "urgency": "Expected",
  "certainty": "Likely",
  "messageType": "Alert",
  "status": "Source alert",
  "place": "Johnson County/Casper BLM",
  "coordinates": null,
  "issuer": "NWS Riverton WY",
  "summary": "Red Flag Warning · Johnson County/Casper BLM. Severe; likely; urgency: expected.",
  "description": "The National Weather Service in Riverton has issued a Red Flag\nWarning, which is in effect from noon to 8 PM MDT Friday.\n\n* IMPACTS: Low Humidities...Strong Gusty Winds...and Wind Shift\nwith a Cold Front could cause erratic fire behavior.\n\n* AFFECTED AREA:\nIn North Central WY...Fire Weather Zone 281.\n\n* COUNTIES AFFECTED:\nIn North Central WY...Johnson.\n\n* COLD FRONT: Moves in after 8 PM MDT Friday, with northerly 20 to\n35 mph winds and gusts of 35 to 40 mph.\n\n* WIND: Southwest 25 to 35 mph with gusts up to 50 mph.\n\n* HUMIDITY: As low as 20 percent.",
  "instruction": "A Red Flag Warning means that critical fire weather conditions are\neither occurring now....or will shortly. A combination of strong\nwinds...low relative humidity...and warm temperatures can\ncontribute to extreme fire behavior.",
  "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.df4580455977900e0a0e8e0a209e72dc934daefd.001.1",
  "source": "nws",
  "sourceName": "NOAA NWS"
}

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