Alert archive / Utah / Flash Flood Warnings in 2026

Flash Flood Warning 113, NWS Salt Lake City, UT

August 31, 2026Piute County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Aug 31, 2026, 3:11 PM MDT for Piute County, Utah. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 31, 2026, 3:11 PM MDT (21:11 UTC)
Expired
Aug 31, 2026, 6:15 PM MDT
In force
3 hr
Issued by
NWS Salt Lake City, UT
Area
Storm-based polygon
Damage threat
Considerable
Flood severity
None

County Piute County, UT

The radar

The Cedar City radar (KICX), 90 km from the middle of the area, began a volume at 21:11 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.

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 9.2 hours before the alert went out and 280 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Salt Lake City I, UT at 12:00Z on 2026-08-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 39 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Salt Lake City I, UT at 12:00Z on 2026-08-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 34 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
39 J/kg
Mixed-layer CIN
-292 J/kg
Mixed-layer LCL
1883 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
34 m²/s²
0-3 km storm-relative helicity
87 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

566 
WGUS55 KSLC 312111
FFWSLC
UTC031-010015-
/O.NEW.KSLC.FF.W.0113.260831T2111Z-260901T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
311 PM MDT Mon Aug 31 2026

The National Weather Service in Salt Lake City has issued a

* Flash Flood Warning for...
  The Cottonwood burn scar Piute in...
  West Central Piute County in central Utah...

* Until 615 PM MDT.

* At 311 PM MDT, Emergency management reported flooding and debris
  flow on the City Creek drainage and subsequent flooding across
  Highway 89 due to heavy rain over the Cottonwood Burn Scar. Between
  0.5 and 1 inch of rain has fallen. Flash flooding is ongoing. The
  debris flow can consist of rock, mud, vegetation and other loose
  materials.

  HAZARD...Life threatening flash flooding. Thunderstorms producing
           flash flooding in and around the Cottonwood Burn Scar.

  SOURCE...Emergency management reported.

  IMPACT...Life threatening flash flooding of areas in and around the
           Cottonwood Burn Scar, especially the City Creek drainage.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a life threatening situation. Heavy rainfall will cause
extensive and severe flash flooding of creeks...streams...and ditches
in the Cottonwood Burn Scar. Severe debris flows can also be
anticipated across roads. Roads and driveways may be washed away in
places. If you encounter flood waters...climb to safety.

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

&&

LAT...LON 3831 11234 3831 11233 3827 11231 3828 11231
      3826 11225 3826 11221 3825 11220 3826 11228
      3827 11230 3824 11235 3825 11238 3829 11234
      3830 11235 3831 11235

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

$$

AD
1 follow-up statement
921 
WGUS75 KSLC 010013
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
613 PM MDT Mon Aug 31 2026

UTC031-010023-
/O.EXP.KSLC.FF.W.0113.000000T0000Z-260901T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Piute UT-
613 PM MDT Mon Aug 31 2026

...FLASH FLOOD WARNING FOR THE COTTONWOOD BURN SCAR WILL EXPIRE AT
615 PM MDT THIS EVENING FOR WEST CENTRAL PIUTE COUNTY...

The heavy rain has ended and flows have decreased.

A Flood Watch remains in effect until 900 PM MDT for portions of
central, southern, and southwest Utah.

&&

LAT...LON 3831 11234 3831 11233 3827 11231 3828 11231
      3826 11225 3826 11221 3825 11220 3826 11228
      3827 11230 3824 11235 3825 11238 3829 11234
      3830 11235 3831 11235

$$

AD

The office that day

Everything else NWS Salt Lake City, UT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 30, 6:23 PM MDTSpecial Weather StatementSLCDuchesne52 min
Aug 30, 7:07 PM MDTSpecial Weather StatementSLCDuchesne38 min
Aug 31, 6:37 AM MDTFlash Flood Warning Considerable damage threatSLCKane4 hr
Aug 31, 9:50 AM MDTFlash Flood Warning Considerable damage threatSLCGarfield3 hr
Aug 31, 10:19 AM MDTFlash Flood Warning Considerable damage threatSLCGarfield, Wayne3 hr
Aug 31, 10:46 AM MDTFlash Flood Warning Considerable damage threatSLCEmery, Wayne4 hr
Aug 31, 10:59 AM MDTSpecial Weather StatementSLCIron46 min
Aug 31, 11:04 AM MDTFlash Flood Warning Considerable damage threatSLCGarfield, Kane14 hr
Aug 31, 11:16 AM MDTFlash Flood Warning Considerable damage threatSLCKane, Washington5 hr
Aug 31, 11:21 AM MDTSpecial Weather StatementSLC39 min
Aug 31, 11:27 AM MDTSpecial Weather StatementSLCWashington48 min
Aug 31, 11:47 AM MDTAreal Flood AdvisorySLCWashington3 hr
Aug 31, 11:51 AM MDTSevere Thunderstorm WarningSLCGarfield, Iron, Kane24 min
Aug 31, 12:04 PM MDTSevere Thunderstorm WarningSLCWashington41 min
Aug 31, 12:06 PM MDTSpecial Weather StatementSLCWashington39 min
Aug 31, 12:07 PM MDTSpecial Weather StatementSLCMillard38 min
Aug 31, 12:16 PM MDTSpecial Weather StatementSLC44 min
Aug 31, 12:20 PM MDTFlash Flood Warning Considerable damage threatSLCGarfield3 hr
Aug 31, 1:00 PM MDTFlash Flood Warning Considerable damage threatSLCKane, Washington3 hr
Aug 31, 1:05 PM MDTSpecial Weather StatementSLCKane40 min
Aug 31, 1:10 PM MDTSpecial Weather StatementSLC50 min
Aug 31, 1:16 PM MDTSpecial Weather StatementSLCKane44 min
Aug 31, 1:43 PM MDTSpecial Weather StatementSLCBeaver47 min
Aug 31, 1:45 PM MDTSevere Thunderstorm WarningSLCJuab, Millard45 min
Aug 31, 1:48 PM MDTFlash Flood Warning Considerable damage threatSLCGarfield10 hr
Aug 31, 1:52 PM MDTFlash Flood Warning Considerable damage threatSLCPiute3 hr
Aug 31, 2:04 PM MDTSpecial Weather StatementSLC41 min
Aug 31, 2:22 PM MDTFlash Flood Warning Considerable damage threatSLCWashington3 hr
Aug 31, 2:30 PM MDTSpecial Weather StatementSLCIron45 min
Aug 31, 2:30 PM MDTSevere Thunderstorm WarningSLCJuab, Millard45 min
Aug 31, 2:40 PM MDTSpecial Weather StatementSLCSalt Lake35 min
Aug 31, 3:13 PM MDTSpecial Weather StatementSLCJuab32 min
Aug 31, 3:39 PM MDTAreal Flood AdvisorySLCGarfield3 hr
Aug 31, 3:41 PM MDTRiver Flood AdvisorySLCWashington8 hr
Aug 31, 3:58 PM MDTFlash Flood Warning Considerable damage threatSLCKane, Washington9 hr
Aug 31, 4:39 PM MDTSpecial Weather StatementSLCSalt Lake51 min
Aug 31, 4:57 PM MDTSpecial Weather StatementSLCWayne33 min
Aug 31, 5:36 PM MDTSpecial Weather StatementSLCDavis, Weber24 min
Aug 31, 5:41 PM MDTSpecial Weather StatementSLCTooele34 min
Aug 31, 5:53 PM MDTSevere Thunderstorm WarningSLCBox Elder, Tooele37 min

Nearby

Flash Flood Warnings in Utah, 2026Every flash flood warning in 2026

Sources

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.