Flash Flood Warning 102, NWS Salt Lake City, UT

Issued

Aug 18, 2021, 4:41 AM MDT (10:41 UTC)

Expired

Aug 18, 2021, 7:45 AM MDT

In force

3 hr

Issued by

NWS Salt Lake City, UT

Area

Storm-based polygon

Damage threat

Considerable

Flood severity

None

County Iron County, UT

The Cedar City radar (KICX), 12 km from the middle of the area, began a volume at 10:42 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.

683 
WGUS55 KSLC 181041
FFWSLC
UTC021-181345-
/O.NEW.KSLC.FF.W.0102.210818T1041Z-210818T1345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Salt Lake City has issued a

* Flash Flood Warning for...
  South Central Iron County in southern Utah...

* Until 745 AM MDT.

* At 441 AM MDT, emergency management reported flash flooding in 
  Coal Creek near Cedar City. Between 1 and 1.5 inches of rain have 
  fallen in the past 3 hours in the headwaters of Coal Creek. Flash 
  flooding is already occurring.

  HAZARD...Life threatening flash flooding. Heavy rain producing
           flash flooding.

  SOURCE...Emergency management reported.

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

* Some locations that will experience flash flooding include...
  Cedar City and Cedar Breaks National Monument.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3771 11307 3768 11300 3765 11294 3768 11287
      3761 11285 3758 11291 3761 11296 3765 11301
      3767 11308

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

LC

887 
WGUS75 KSLC 181240
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
640 AM MDT Wed Aug 18 2021

UTC021-181345-
/O.CON.KSLC.FF.W.0102.000000T0000Z-210818T1345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Iron UT-
640 AM MDT Wed Aug 18 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 AM MDT THIS 
MORNING FOR SOUTH CENTRAL IRON COUNTY...

At 640 AM MDT, emergency management reported flash flooding in Coal 
Creek near Cedar City. Between 1 and 1.5 inches of rain have fallen. 
Flash flooding is already occurring.

HAZARD...Life threatening flash flooding. Heavy rain producing
         flash flooding.

SOURCE...Emergency management reported.

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

Some locations that will experience flash flooding include...
  Cedar City.

The river gage on Coal Creek near Cedar City peaked at 1160 cfs 
overnight.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3771 11307 3768 11300 3765 11294 3768 11287
      3761 11285 3758 11291 3761 11296 3765 11301
      3767 11308

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

LC

063 
WGUS75 KSLC 181343
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
743 AM MDT Wed Aug 18 2021

UTC021-181353-
/O.EXP.KSLC.FF.W.0102.000000T0000Z-210818T1345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Iron UT-
743 AM MDT Wed Aug 18 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 745 AM MDT THIS MORNING FOR 
SOUTH CENTRAL IRON COUNTY...

The heavy rain has ended over Coal Creek. Additional flooding is not 
imminent. However, periods of heavy rain may redevelop, so 
additional flooding may be possible later today.

A Flash Flood Watch remains in effect until 1200 AM MDT Thursday.

LAT...LON 3771 11307 3768 11300 3765 11294 3768 11287
      3761 11285 3758 11291 3761 11296 3765 11301
      3767 11308

$$

LC

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.