Flash Flood Warning 109, NWS Salt Lake City, UT

Issued

Aug 18, 2021, 1:39 PM MDT (19:39 UTC)

Expired

Aug 18, 2021, 4:45 PM MDT

In force

3 hr

Issued by

NWS Salt Lake City, UT

Area

Storm-based polygon

Damage threat

Considerable

Flood severity

None

Counties Kane County, UT, Washington County, UT

The Cedar City radar (KICX), 36 km from the middle of the area, began a volume at 19:39 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

876 
WGUS55 KSLC 181939
FFWSLC
UTC025-053-182245-
/O.NEW.KSLC.FF.W.0109.210818T1939Z-210818T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
139 PM MDT Wed Aug 18 2021

The National Weather Service in Salt Lake City has issued a

* Flash Flood Warning for...
  West Central Kane County in southern Utah...
  East Central Washington County in southwestern Utah...

* Until 445 PM MDT.

* At 139 PM MDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Radar.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Zion National Park, Springdale and Rockville.

Impacted areas include the North Fork of the Virgin River, the 
Narrows, Clear Creek, the East Fork of the Virgin River and 
Parunuweap Canyon. All slot canyons in the area including Keyhole, 
Pine and Spry.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Remain alert for flooding even in locations not receiving rain. Dry 
washes, streams, and rivers can become raging killer currents in a 
matter of minutes, even from distant rainfall.

&&

LAT...LON 3738 11297 3739 11277 3722 11271 3713 11285
      3716 11305 3724 11299

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

CRK

583 
WGUS75 KSLC 182143
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
343 PM MDT Wed Aug 18 2021

UTC025-053-182245-
/O.CON.KSLC.FF.W.0109.000000T0000Z-210818T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kane UT-Washington UT-
343 PM MDT Wed Aug 18 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM MDT THIS 
AFTERNOON FOR WEST CENTRAL KANE AND EAST CENTRAL WASHINGTON 
COUNTIES...

At 343 PM MDT, Doppler radar indicated thunderstorms produced heavy 
rain across the warned area. Flash flooding is ongoing or expected 
to begin shortly.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding.

SOURCE...Radar.

IMPACT...Life threatening flash flooding of creeks, streams,
         normally dry washes and slot canyons.

Some locations that will experience flash flooding include...
  Zion National Park, Springdale and Rockville.

Impacted areas include the North Fork of the Virgin River, the 
Narrows, Clear Creek, the East Fork of the Virgin River and 
Parunuweap Canyon. All slot canyons in the area including Keyhole, 
Pine and Spry.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Remain alert for flooding even in locations not receiving rain. Dry 
washes, streams, and rivers can become raging killer currents in a 
matter of minutes, even from distant rainfall.

&&

LAT...LON 3738 11297 3739 11277 3722 11271 3713 11285
      3716 11305 3724 11299

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

CRK

091 
WGUS75 KSLC 182237
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
437 PM MDT Wed Aug 18 2021

UTC025-053-182247-
/O.EXP.KSLC.FF.W.0109.000000T0000Z-210818T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kane UT-Washington UT-
437 PM MDT Wed Aug 18 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 445 PM MDT THIS AFTERNOON FOR 
WEST CENTRAL KANE AND EAST CENTRAL WASHINGTON COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

A Flash Flood Watch remains in effect until 600 AM MDT Thursday for 
a portion of southwest Utah.

LAT...LON 3738 11297 3739 11277 3722 11271 3713 11285
      3716 11305 3724 11299

$$

CRK

Flash Flood Warnings in Utah, 2021Every flash flood warning in 2021

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.