Alert archive / Utah / Flash Flood Warnings in 2021
Flash Flood Warning 126, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 26, 2021, 3:28 PM MDT for Emery 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 26, 2021, 3:28 PM MDT (21:28 UTC)
- Expired
- Aug 26, 2021, 6:30 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, Wayne County, UT
The radar
The Grand Junction radar (KGJX), 217 km from the middle of the area, began a volume at 21:28 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, 9.5 hours before the alert went out and 197 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3119 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -78 m²/s²
- 0-3 km storm-relative helicity
- -14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
144
WGUS55 KSLC 262128
FFWSLC
UTC015-055-270030-
/O.NEW.KSLC.FF.W.0126.210826T2128Z-210827T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
328 PM MDT Thu Aug 26 2021
The National Weather Service in Salt Lake City has issued a
* Flash Flood Warning for...
Southern Emery County in central Utah...
Eastern Wayne County in southern Utah...
* Until 630 PM MDT.
* At 328 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain across a large portion of Wayne county. 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,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Hanksville, Caineville, Blue John Canyon, Horseshoe Canyon,
Robbers Roast, and slot canyons and drainages going into the Dirty
Devil.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3815 11097 3844 11108 3856 11013 3839 11003
3838 11003 3833 11000 3815 11096
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
MT3 follow-up statements
529
WGUS75 KSLC 262132
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
332 PM MDT Thu Aug 26 2021
UTC015-055-270030-
/O.CON.KSLC.FF.W.0126.000000T0000Z-210827T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Emery UT-Wayne UT-
332 PM MDT Thu Aug 26 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM MDT THIS
EVENING FOR SOUTHERN EMERY AND EASTERN WAYNE COUNTIES...
At 332 PM MDT, Doppler radar indicated thunderstorms producing heavy
rain across a large portion of Wayne county. Flash flooding is
ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Hanksville, Caineville, Blue John Canyon, Horseshoe Canyon,
Robbers Roost, and slot canyons and drainages going into the Dirty
Devil.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3815 11097 3844 11108 3856 11013 3839 11003
3838 11003 3833 11000 3815 11096
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
MT106
WGUS75 KSLC 262301
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
501 PM MDT Thu Aug 26 2021
UTC015-055-270030-
/O.CON.KSLC.FF.W.0126.000000T0000Z-210827T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Emery UT-Wayne UT-
501 PM MDT Thu Aug 26 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM MDT THIS
EVENING FOR SOUTHERN EMERY AND EASTERN WAYNE COUNTIES...
At 501 PM MDT, Doppler radar indicated thunderstorms producing heavy
rain have passed through a large portion of Wayne county. Flash
flooding is expected to be ongoing as the storms exit the area.
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...
Hanksville, Caineville, Blue John Canyon, Horseshoe Canyon,
Robbers Roost, and slot canyons and drainages going into the Dirty
Devil.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3815 11097 3844 11108 3856 11013 3839 11003
3838 11003 3833 11000 3815 11096
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
MT642
WGUS75 KSLC 270021
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
621 PM MDT Thu Aug 26 2021
UTC015-055-270031-
/O.EXP.KSLC.FF.W.0126.000000T0000Z-210827T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Emery UT-Wayne UT-
621 PM MDT Thu Aug 26 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 630 PM MDT THIS EVENING FOR
SOUTHERN EMERY AND EASTERN WAYNE COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 3815 11097 3844 11108 3856 11013 3839 11003
3838 11003 3833 11000 3815 11096
$$
MTThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 6:02 PM MDT | Special Weather Statement | SLC | Utah | 28 min |
| Aug 25, 6:30 PM MDT | Special Weather Statement | SLC | Salt Lake | 30 min |
| Aug 25, 6:48 PM MDT | Special Weather Statement | SLC | Wasatch | 27 min |
| Aug 25, 7:24 PM MDT | Special Weather Statement | SLC | Utah | 36 min |
| Aug 25, 10:10 PM MDT | Special Weather Statement | SLC | Salt Lake | 35 min |
| Aug 26, 1:23 PM MDT | Special Weather Statement | SLC | Duchesne | 37 min |
| Aug 26, 2:27 PM MDT | Special Weather Statement | SLC | Wayne | 33 min |
| Aug 26, 2:50 PM MDT | Severe Thunderstorm Warning | SLC | Emery, Wayne | 25 min |
| Aug 26, 3:00 PM MDT | Special Weather Statement | SLC | Emery | 45 min |
| Aug 26, 3:09 PM MDT | Severe Thunderstorm Warning | SLC | Emery | 36 min |
| Aug 26, 3:13 PM MDT | Severe Thunderstorm Warning | SLC | Emery, Wayne | 32 min |
| Aug 26, 3:44 PM MDT | Special Weather Statement | SLC | Emery | 31 min |
| Aug 26, 3:49 PM MDT | Special Weather Statement | SLC | 26 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.