Alert archive / Utah / Flash Flood Warnings in 2023
Flash Flood Warning 13, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 18, 2023, 1:32 PM MDT for Emery 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 18, 2023, 1:32 PM MDT (19:32 UTC)
- Expired
- Jul 18, 2023, 4:30 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Emery County, UT
The radar
The Grand Junction radar (KGJX), 216 km from the middle of the area, began a volume at 19:31 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, 7.5 hours before the alert went out and 193 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
- 3953 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 0 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
199
WGUS55 KSLC 181932
FFWSLC
UTC015-182230-
/O.NEW.KSLC.FF.W.0013.230718T1932Z-230718T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
132 PM MDT Tue Jul 18 2023
The National Weather Service in Salt Lake City has issued a
* Flash Flood Warning for...
South Central Emery County in central Utah...
* Until 430 PM MDT.
* At 132 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.25 and 0.75 inches of
rain have fallen. Additional rainfall amounts of 0.25 to 0.5
inches are possible in 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,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Goblin Valley.
This includes the following streams and drainages...
Straight Wash, Cottonwood Wash, Wild Horse Creek and Iron Wash.
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 3871 11084 3884 11052 3874 11040 3857 11075
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
HM2 follow-up statements
078
WGUS75 KSLC 182103
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
303 PM MDT Tue Jul 18 2023
UTC015-182230-
/O.CON.KSLC.FF.W.0013.000000T0000Z-230718T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Emery UT-
303 PM MDT Tue Jul 18 2023
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM MDT THIS
AFTERNOON FOR SOUTH CENTRAL EMERY COUNTY...
At 303 PM MDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 0.50 and 0.75 inches of rain
have fallen. Little additional rainfall expected in the warned area.
Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Goblin Valley.
This includes the following streams and drainages...
Straight Wash, Cottonwood Wash, Wild Horse Creek and Iron Wash.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Remain alert for flooding even in locations not receiving rain. Dry
washes, streams, and rivers can become raging killer currents in a
matter of minutes, even from distant rainfall.
Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.
&&
LAT...LON 3871 11084 3884 11052 3874 11040 3857 11075
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
HM582 WGUS75 KSLC 182226 FFSSLC Flash Flood Statement National Weather Service Salt Lake City UT 426 PM MDT Tue Jul 18 2023 UTC015-182236- /O.EXP.KSLC.FF.W.0013.000000T0000Z-230718T2230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Emery UT- 426 PM MDT Tue Jul 18 2023 ...FLASH FLOOD WARNING WILL EXPIRE AT 430 PM MDT THIS AFTERNOON FOR SOUTH CENTRAL EMERY COUNTY... Flood waters have receded. The heavy rain has ended. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. LAT...LON 3871 11084 3884 11052 3874 11040 3857 11075 $$ HM
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 6:11 PM MDT | Special Weather Statement | SLC | Juab | 64 min |
| Jul 18, 11:45 AM MDT | Flash Flood Warning | SLC | Garfield, Wayne | 3 hr |
| Jul 18, 12:44 PM MDT | Special Weather Statement | SLC | Wayne | 31 min |
| Jul 18, 3:11 PM MDT | Special Weather Statement | SLC | Sanpete | 49 min |
| Jul 18, 3:12 PM MDT | Excessive Heat Watch | SLC | Box Elder, Davis, Garfield, Iron, Kane, Salt Lake and 5 more | 47 hr |
| Jul 18, 3:14 PM MDT | Special Weather Statement | SLC | Sevier | 31 min |
| Jul 18, 3:25 PM MDT | Special Weather Statement | SLC | Tooele | 50 min |
| Jul 18, 3:57 PM MDT | Special Weather Statement | SLC | Box Elder | 33 min |
| Jul 18, 4:50 PM MDT | Special Weather Statement | SLC | Utah | 25 min |
| Jul 18, 5:03 PM MDT | Special Weather Statement | SLC | Cache, Rich | 57 min |
Nearby
Flash Flood Warnings in Utah, 2023Every flash flood warning in 2023
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.