Alert archive / Utah / Flash Flood Warnings in 2021
Flash Flood Warning 61, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 28, 2021, 12:19 PM MDT for Cache 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 28, 2021, 12:19 PM MDT (18:19 UTC)
- Expired
- Jul 28, 2021, 3:15 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
County Cache County, UT
The radar
The Salt Lake City radar (KMTX), 96 km from the middle of the area, began a volume at 18:21 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
Salt Lake City I, UT (KSLC), launched 12:00Z, 6.3 hours before the alert went out and 113 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
- 104 J/kg
- Mixed-layer CIN
- -191 J/kg
- Mixed-layer LCL
- 2082 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
553
WGUS55 KSLC 281819
FFWSLC
UTC005-282115-
/O.NEW.KSLC.FF.W.0061.210728T1819Z-210728T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
1219 PM MDT Wed Jul 28 2021
The National Weather Service in Salt Lake City has issued a
* Flash Flood Warning for...
East Central Cache County in northern Utah...
* Until 315 PM MDT.
* At 1219 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain across the headwaters of Saddle Creek. Between 2 and 3
inches of rain have fallen in the past hour. Flash flooding is
ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
mainly rural areas of East Central Cache County
This includes the following streams and drainages...
Saddle Creek and associated tributaries.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4181 11146 4178 11145 4176 11145 4168 11145
4167 11151 4167 11160 4173 11155 4177 11153
4180 11151
FLASH FLOOD...RADAR INDICATED
$$
SW1 follow-up statement
989
WGUS75 KSLC 282114
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
314 PM MDT Wed Jul 28 2021
UTC005-282124-
/O.EXP.KSLC.FF.W.0061.000000T0000Z-210728T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cache UT-
314 PM MDT Wed Jul 28 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 315 PM MDT THIS AFTERNOON FOR
EAST CENTRAL CACHE COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Runoff from earlier heavy rainfall will continue to decrease
through the afternoon and evening hours. Please continue to heed any
road closures.
LAT...LON 4181 11146 4178 11145 4176 11145 4168 11145
4167 11151 4167 11160 4173 11155 4177 11153
4180 11151
$$
SWThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 11:57 AM MDT | Special Weather Statement | SLC | Cache | 48 min |
| Jul 28, 1:55 PM MDT | Flash Flood Warning | SLC | Morgan | 3 hr |
| Jul 28, 2:17 PM MDT | Flash Flood Warning | SLC | Emery | 3 hr |
| Jul 28, 3:47 PM MDT | Flash Flood Warning | SLC | Davis, Morgan | 3 hr |
| Jul 28, 3:50 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder | 25 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.