Flash Flood Warning issued October 21 at 2:49PM MDT until October 21 at 4:00PM MDT by NWS Salt Lake City UT

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   21 October 2026 at 20:55 UTC

   Version 2

   Source status changed

   Title

   Before

   Flash Flood Warning issued October 21 at 1:04PM MDT until October 21 at 4:00PM MDT by NWS Salt Lake City UT

   After

   Flash Flood Warning issued October 21 at 2:49PM MDT until October 21 at 4:00PM MDT by NWS Salt Lake City UT

   Source updated

   Before

   21 October 2026 at 19:04 UTC

   After

   21 October 2026 at 20:49 UTC

   Effective from

   Before

   21 October 2026 at 19:04 UTC

   After

   21 October 2026 at 20:49 UTC

   Forecast onset

   Before

   21 October 2026 at 19:04 UTC

   After

   21 October 2026 at 20:49 UTC

   Message type

   Before

   Alert

   After

   Update

   Source status

   Before

   Source alert

   After

   Source update

   Official description

   Before

   FFWSLC The National Weather Service in Salt Lake City has issued a * Flash Flood Warning for... East Central Washington County in southwestern Utah... * Until 400 PM MDT. * At 104 PM MDT, Doppler radar indicated thunderstorms producing heavy rain across Zion Canyon within Zion National Park. Up to 0.25 inches of rain have fallen. Additional rainfall amounts of 0.25 to 0.5 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding. SOURCE...Radar indicated. IMPACT...Life threatening flash flooding of slot canyons and normally dry washes. * Some locations that will experience flash flooding include... Zion National Park.

   After

   At 249 PM MDT, Zion National Park Service dispatch reported ongoing flash flooding within Zion Canyon in Zion National Park, specifically Behunin Canyon and upper Emerald Pools...but additional flash flooding is occurring in areas on the east side of the canyon as well. Up to 0.5 inches of rain have fallen. Additional thunderstorms capable of heavy rain remain possible through the remainder of the day. Flash flooding is already occurring. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding. SOURCE...National Park Service reported. IMPACT...Life threatening flash flooding of slot canyons and normally dry washes. Some locations that will experience flash flooding include... Zion National Park.

   Official instructions

   Before

   …o protect your life. Stay away or be swept away. River banks and culverts can become unstable and unsafe. Flooding is occurring or is imminent. It is important to know where you are relative to streams, rivers, or creeks which can become killers in heavy rains. Campers and hikers should avoid streams or creeks.

   After

   …o protect your life. Stay away or be swept away. River banks and culverts can become unstable and unsafe. Flooding is occurring. It is important to know where you are relative to waterways within the park which can become killers in heavy rains. Campers and hikers should avoid slot canyons, normally dry washes, creeks, and streams.

   External source link

   Before

   https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.9024af0ff84ce79a33889c105131743842b82dfb.001.1

   After

   https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.10eb5d6b04d08b914504fc193c16b4a26dbbc078.001.1

   Bulletin issued: 21 October 2026 at 20:49 UTC

   View saved version 2

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

   {
     "id": "nws:0b23db01be3d2759825f5be5",
     "authorityId": "urn:oid:2.49.0.1.840.0.10eb5d6b04d08b914504fc193c16b4a26dbbc078.001.1",
     "sender": "w-nws.webmaster@noaa.gov",
     "references": [
       {
         "identifier": "urn:oid:2.49.0.1.840.0.9024af0ff84ce79a33889c105131743842b82dfb.001.1",
         "sender": "w-nws.webmaster@noaa.gov"
       }
     ],
     "category": "weather",
     "title": "Flash Flood Warning issued October 21 at 2:49PM MDT until October 21 at 4:00PM MDT by NWS Salt Lake City UT",
     "eventType": "Flash Flood Warning",
     "occurredAt": "2026-10-21T20:49:00.000Z",
     "issuedAt": "2026-10-21T20:49:00.000Z",
     "timeBasis": "Bulletin issued",
     "effectiveAt": "2026-10-21T20:49:00.000Z",
     "onsetAt": "2026-10-21T20:49:00.000Z",
     "expiresAt": "2026-10-21T22:00:00.000Z",
     "forecastEndAt": "2026-10-21T22:00:00.000Z",
     "severity": "Severe",
     "urgency": "Immediate",
     "certainty": "Likely",
     "messageType": "Update",
     "status": "Source update",
     "place": "Washington, UT",
     "coordinates": null,
     "issuer": "NWS Salt Lake City UT",
     "summary": "Flash Flood Warning · Washington, UT. Severe; likely; urgency: immediate.",
     "description": "At 249 PM MDT, Zion National Park Service dispatch reported ongoing\nflash flooding within Zion Canyon in Zion National Park, specifically\nBehunin Canyon and upper Emerald Pools...but additional flash\nflooding is occurring in areas on the east side of the canyon as\nwell. Up to 0.5 inches of rain have fallen. Additional thunderstorms\ncapable of heavy rain remain possible through the remainder of the\nday. Flash flooding is already occurring.\n\nHAZARD...Life threatening flash flooding. Thunderstorms producing\nflash flooding.\n\nSOURCE...National Park Service reported.\n\nIMPACT...Life threatening flash flooding of slot canyons and normally\ndry washes.\n\nSome locations that will experience flash flooding include...\nZion National Park.",
     "instruction": "Move to higher ground now. Act quickly to protect your life.\n\nStay away or be swept away. River banks and culverts can become\nunstable and unsafe.\n\nFlooding is occurring. It is important to know where you are relative\nto waterways within the park which can become killers in heavy rains.\nCampers and hikers should avoid slot canyons, normally dry washes,\ncreeks, and streams.",
     "url": "https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.10eb5d6b04d08b914504fc193c16b4a26dbbc078.001.1",
     "source": "nws",
     "sourceName": "NOAA NWS"
   }

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