Alert archive / Utah / Flash Flood Warnings in 2021
Flash Flood Warning 7, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 13, 2021, 2:14 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
- Jul 13, 2021, 2:14 PM MDT (20:14 UTC)
- Expired
- Jul 13, 2021, 5:15 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Wayne County, UT
The radar
The Cedar City radar (KICX), 150 km from the middle of the area, began a volume at 20:17 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, 8.2 hours before the alert went out and 271 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.
- Mixed-layer CAPE
- 27 J/kg
- Mixed-layer CIN
- -350 J/kg
- Mixed-layer LCL
- 3436 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 184 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
242
WGUS55 KSLC 132014
FFWSLC
UTC055-132315-
/O.NEW.KSLC.FF.W.0007.210713T2014Z-210713T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
214 PM MDT Tue Jul 13 2021
The National Weather Service in Salt Lake City has issued a
* Flash Flood Warning for...
West Central Wayne County in southern Utah...
* Until 515 PM MDT.
* At 214 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.75 and 1.25 inches of
rain have fallen. Flash flooding is ongoing or expected to begin
shortly in the headwaters of the Sand Creek Wash to the confluence
of Sulfur Creek and through the town of Torrey. Additionally,
flows are expected out of Sunglow Canyon near the town of Bicknell.
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...
Bicknell and Torrey.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3842 11147 3838 11142 3833 11136 3831 11136
3829 11138 3830 11155 3834 11156 3838 11153
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
SW2 follow-up statements
377
WGUS75 KSLC 132219
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
419 PM MDT Tue Jul 13 2021
UTC055-132315-
/O.CON.KSLC.FF.W.0007.000000T0000Z-210713T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wayne UT-
419 PM MDT Tue Jul 13 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM MDT THIS
AFTERNOON FOR WEST CENTRAL WAYNE COUNTY...
At 419 PM MDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 1 and 2 inches of rain have
fallen in the upper headwaters of the Sand Creek Wash. Flash
flooding is ongoing or expected to begin shortly. This water is
expected to continue flowing through the Sand Creek Wash downstream
toward Sulphur Creek.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Bicknell and Torrey.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3842 11147 3838 11142 3833 11136 3831 11136
3829 11138 3830 11155 3834 11156 3838 11153
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
SW792
WGUS75 KSLC 132311
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
511 PM MDT Tue Jul 13 2021
UTC055-132321-
/O.EXP.KSLC.FF.W.0007.000000T0000Z-210713T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wayne UT-
511 PM MDT Tue Jul 13 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 515 PM MDT THIS AFTERNOON FOR
WEST CENTRAL WAYNE COUNTY...
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 1200 AM MDT Wednesday
for portions of southern Utah and southwest Utah.
LAT...LON 3842 11147 3838 11142 3833 11136 3831 11136
3829 11138 3830 11155 3834 11156 3838 11153
$$
SWThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 3:03 PM MDT | Flash Flood Warning | SLC | Wayne | 3 hr |
| Jul 13, 3:28 PM MDT | Special Weather Statement | SLC | Carbon | 32 min |
| Jul 13, 4:50 PM MDT | Special Weather Statement | SLC | Beaver | 40 min |
| Jul 13, 5:17 PM MDT | Special Weather Statement | SLC | Beaver, Millard | 43 min |
Nearby
Flash Flood Warnings in Utah, 2021Every flash flood warning in 2021
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.