Alert archive / Utah / Flash Flood Warnings in 2021
Flash Flood Warning 82, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 1, 2021, 6:01 PM MDT for Emery County, Garfield County, 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
- Aug 1, 2021, 6:01 PM MDT (00:01 UTC)
- Expired
- Aug 1, 2021, 9:00 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Emery County, UT, Garfield County, UT, Wayne County, UT
The radar
The Grand Junction radar (KGJX), 175 km from the middle of the area, began a volume at 00:03 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 00:00Z, 0.0 hours before the alert went out and 154 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
- 162 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 2258 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
524
WGUS55 KSLC 020001
FFWSLC
UTC015-017-055-020300-
/O.NEW.KSLC.FF.W.0082.210802T0001Z-210802T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
601 PM MDT Sun Aug 1 2021
The National Weather Service in Salt Lake City has issued a
* Flash Flood Warning for...
Southeastern Emery County in central Utah...
Northeastern Garfield County in southern Utah...
Eastern Wayne County in southern Utah...
* Until 900 PM MDT.
* At 601 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,
normally dry washes, highways, and slot canyons.
* Some locations that will experience flash flooding include...
mainly rural areas of Southeastern Emery, Northeastern Garfield
and Eastern Wayne Counties
This includes the following highways...
Utah Route 95 between mile markers 6 and 24 as well as Poison
Springs Canyon, Moonshine Wash, and additional tributaries of the
Dirty Devil River.
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.
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 3878 11038 3877 11009 3875 11008 3875 11010
3873 11011 3871 11011 3871 11009 3869 11010
3868 11009 3867 11009 3867 11007 3866 11007
3866 11006 3862 11006 3861 11007 3860 11006
3845 11005 3802 11029 3806 11081
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
CRK2 follow-up statements
646
WGUS75 KSLC 020129
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
729 PM MDT Sun Aug 1 2021
UTC015-017-055-020300-
/O.CON.KSLC.FF.W.0082.000000T0000Z-210802T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Emery UT-Garfield UT-Wayne UT-
729 PM MDT Sun Aug 1 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING
FOR SOUTHEASTERN EMERY, NORTHEASTERN GARFIELD AND EASTERN WAYNE
COUNTIES...
At 729 PM MDT, Heavy rain has fallen across the warned area. Flash
flooding is ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
normally dry washes, highways, and slot canyons.
Some locations that will experience flash flooding include...
mainly rural areas of Southeastern Emery, Northeastern Garfield
and Eastern Wayne Counties
This includes the following highways...
Utah Route 95 between mile markers 6 and 24 as well as Poison
Springs Canyon, Moonshine Wash, and additional tributaries of the
Dirty Devil River.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Remain alert for flooding even in locations not receiving rain. Dry
washes, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.
Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.
&&
LAT...LON 3878 11038 3877 11009 3875 11008 3875 11010
3873 11011 3871 11011 3871 11009 3869 11010
3868 11009 3867 11009 3867 11007 3866 11007
3866 11006 3862 11006 3861 11007 3860 11006
3845 11005 3802 11029 3806 11081
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
CRK717
WGUS75 KSLC 020256
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
856 PM MDT Sun Aug 1 2021
UTC015-017-055-020306-
/O.EXP.KSLC.FF.W.0082.000000T0000Z-210802T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Emery UT-Garfield UT-Wayne UT-
856 PM MDT Sun Aug 1 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING FOR
SOUTHEASTERN EMERY, NORTHEASTERN GARFIELD AND EASTERN WAYNE
COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Elevated runoff will continue in area slot canyons, normally
dry washes and streams through late tonight.
A Flash Flood Watch remains in effect until 1200 AM MDT for portions
of central Utah, northern Utah, southern Utah and southwest Utah.
LAT...LON 3878 11038 3877 11009 3875 11008 3875 11010
3873 11011 3871 11011 3871 11009 3869 11010
3868 11009 3867 11009 3867 11007 3866 11007
3866 11006 3862 11006 3861 11007 3860 11006
3845 11005 3802 11029 3806 11081
$$
CRKThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 6:09 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder, Tooele | 51 min |
| Aug 1, 6:17 PM MDT | Special Weather Statement | SLC | Box Elder | 43 min |
| Aug 1, 6:27 PM MDT | Areal Flood Advisory | SLC | Tooele | 3 hr |
| Aug 1, 6:36 PM MDT | Special Weather Statement | SLC | Salt Lake | 39 min |
| Aug 1, 6:47 PM MDT | Severe Thunderstorm Warning | SLC | Davis, Salt Lake, Tooele | 43 min |
| Aug 1, 7:00 PM MDT | Areal Flood Advisory | SLC | Salt Lake | 3 hr |
| Aug 1, 7:07 PM MDT | Areal Flood Advisory | SLC | Garfield, Iron | 113 min |
| Aug 1, 7:25 PM MDT | Severe Thunderstorm Warning | SLC | Davis, Salt Lake | 35 min |
| Aug 1, 7:41 PM MDT | Areal Flood Advisory | SLC | Salt Lake | 3 hr |
| Aug 1, 7:58 PM MDT | Flash Flood Warning | SLC | Davis | 3 hr |
| Aug 1, 8:25 PM MDT | Areal Flood Advisory | SLC | Davis | 3 hr |
| Aug 1, 8:51 PM MDT | Areal Flood Advisory | SLC | Utah | 114 min |
| Aug 1, 9:06 PM MDT | Areal Flood Advisory | SLC | Davis, Weber | 3 hr |
| Aug 2, 2:04 AM MDT | Flash Flood Watch | SLC | Beaver, Box Elder, Cache, Carbon, Davis, Duchesne and 19 more | 18 hr |
| Aug 2, 1:16 PM MDT | Flash Flood Warning | SLC | Carbon | 3 hr |
| Aug 2, 1:27 PM MDT | Flash Flood Warning | SLC | Emery | 3 hr |
| Aug 2, 2:30 PM MDT | Flash Flood Warning | SLC | Wayne | 4 hr |
| Aug 2, 2:56 PM MDT | Flash Flood Warning | SLC | Garfield, Wayne | 3 hr |
| Aug 2, 3:24 PM MDT | Severe Thunderstorm Warning | SLC | Garfield | 66 min |
| Aug 2, 3:32 PM MDT | Special Weather Statement | SLC | Emery | 43 min |
| Aug 2, 3:52 PM MDT | Flash Flood Warning | SLC | Garfield | 4 hr |
| Aug 2, 4:00 PM MDT | Special Weather Statement | SLC | Juab | 45 min |
| Aug 2, 4:14 PM MDT | Flash Flood Warning | SLC | Garfield, San Juan | 3 hr |
| Aug 2, 4:25 PM MDT | Special Weather Statement | SLC | 50 min | |
| Aug 2, 4:55 PM MDT | Special Weather Statement | SLC | 50 min | |
| Aug 2, 5:22 PM MDT | Special Weather Statement | SLC | Box Elder | 38 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.