Alert archive / Utah / Flash Flood Warnings in 2022

Flash Flood Warning 113, NWS Salt Lake City, UT

September 30, 2022Wayne County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Sep 30, 2022, 4:45 PM MDT for Wayne 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: Sep 30, 2022, 4:45 PM MDT (22:45 UTC)
Expired: Sep 30, 2022, 7:45 PM MDT
In force: 3 hr
Issued by: NWS Salt Lake City, UT
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Wayne County, UT

The radar

The Cedar City radar (KICX), 159 km from the middle of the area, began a volume at 22:47 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

Grand Junction, CO (KGJT), launched 12:00Z, 10.8 hours before the alert went out and 259 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 11 J/kg
Mixed-layer CIN: -167 J/kg
Mixed-layer LCL: 1764 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 99 m²/s²
0-3 km storm-relative helicity: 254 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

865 
WGUS55 KSLC 302245
FFWSLC
UTC055-010145-
/O.NEW.KSLC.FF.W.0113.220930T2245Z-221001T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
445 PM MDT Fri Sep 30 2022

The National Weather Service in Salt Lake City has issued a

* Flash Flood Warning for...
  West Central Wayne County in southern Utah...

* Until 745 PM MDT.

* At 445 PM MDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the Sulphur Creek. 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 dry washes, creeks
           and streams.

* Some locations that will experience flash flooding include...
  Sulphur Creek and the Grand Wash in Capitol Reef National Park, 
  and Fruita.

This includes the following streams and drainages...
  Fremont River and Sulphur Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 3828 11117 3826 11121 3826 11124 3827 11135
      3833 11145 3837 11140 3834 11136 3831 11130
      3830 11121

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

$$

LC

2 follow-up statements

552 
WGUS75 KSLC 010015
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
615 PM MDT Fri Sep 30 2022

UTC055-010145-
/O.CON.KSLC.FF.W.0113.000000T0000Z-221001T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wayne UT-
615 PM MDT Fri Sep 30 2022

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM MDT THIS 
EVENING FOR WEST CENTRAL WAYNE COUNTY...

At 615 PM MDT, Doppler radar indicated thunderstorms producing heavy 
rain over Sulphur Creek. 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 dry washes, creeks
         and streams.

Some locations that will experience flash flooding include...
  Sulphur Creek and the Grand Wash in Capitol Reef National Park, 
  and Fruita.

This includes the following streams and drainages...
  Fremont River and Sulphur Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 3828 11117 3826 11121 3826 11124 3827 11135
      3833 11145 3837 11140 3834 11136 3831 11130
      3830 11121

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

$$

LC

956 
WGUS75 KSLC 010141
FFSSLC

Flash Flood Statement
National Weather Service Salt Lake City UT
741 PM MDT Fri Sep 30 2022

UTC055-010151-
/O.EXP.KSLC.FF.W.0113.000000T0000Z-221001T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wayne UT-
741 PM MDT Fri Sep 30 2022

...FLASH FLOOD WARNING WILL EXPIRE AT 745 PM MDT THIS EVENING FOR 
WEST CENTRAL WAYNE COUNTY...

The heavy rain has ended over Capitol Reef National Park. Flooding 
is no longer expected to pose a threat. Please continue to heed 
remaining closures.

LAT...LON 3828 11117 3826 11121 3826 11124 3827 11135
      3833 11145 3837 11140 3834 11136 3831 11130
      3830 11121

$$

LC

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 30, 11:49 AM MDT	Special Weather Statement	SLC	Emery	26 min
Sep 30, 12:04 PM MDT	Special Weather Statement	SLC	Carbon	26 min
Sep 30, 12:21 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Emery	3 hr
Sep 30, 12:23 PM MDT	Special Weather Statement	SLC	Emery	52 min
Sep 30, 12:36 PM MDT	Special Weather Statement	SLC	Carbon	39 min
Sep 30, 1:03 PM MDT	Special Weather Statement	SLC	Wayne	27 min
Sep 30, 1:10 PM MDT	Special Weather Statement	SLC	Garfield	50 min
Sep 30, 1:26 PM MDT	Severe Thunderstorm Warning	SLC	Garfield, Wayne	17 min
Sep 30, 1:47 PM MDT	Special Weather Statement	SLC		43 min
Sep 30, 1:50 PM MDT	Special Weather Statement	SLC	Wayne	40 min
Sep 30, 1:52 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Wayne	3 hr
Sep 30, 2:07 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Wayne	3 hr
Sep 30, 2:41 PM MDT	Special Weather Statement	SLC		34 min
Sep 30, 5:03 PM MDT	Special Weather Statement	SLC	Emery	27 min
Sep 30, 5:19 PM MDT	Flash Flood Warning Considerable damage threat	SLC	Emery	116 min
Sep 30, 5:25 PM MDT	Special Weather Statement	SLC	Iron	35 min
Sep 30, 5:34 PM MDT	Special Weather Statement	SLC	Emery	26 min

Nearby

Flash Flood Warnings in Utah, 2022 Every flash flood warning in 2022

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.