Alert archive / Utah / Flash Flood Warnings in 2021
Flash Flood Warning 22, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 19, 2021, 8:19 PM MDT for Kane County, Utah. It was in force for 86 min. 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 19, 2021, 8:19 PM MDT (02:19 UTC)
- Expired
- Jul 19, 2021, 9:45 PM MDT
- In force
- 86 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Kane County, UT
The radar
The Cedar City radar (KICX), 132 km from the middle of the area, began a volume at 02:20 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
Flgstf/Belemont, AZ (KFGZ), launched 00:00Z, 2.3 hours before the alert went out and 211 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
- 220 J/kg
- Mixed-layer CIN
- -81 J/kg
- Mixed-layer LCL
- 1401 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
107
WGUS55 KSLC 200219
FFWSLC
UTC025-200345-
/O.NEW.KSLC.FF.W.0022.210720T0219Z-210720T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Salt Lake City UT
819 PM MDT Mon Jul 19 2021
The National Weather Service in Salt Lake City has issued a
* Flash Flood Warning for...
South Central Kane County in southern Utah...
* Until 945 PM MDT.
* At 819 PM MDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 0.75 and 1 inch of rain
has fallen. 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...
southern portions of Warm Creek and associated tributaries.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3715 11154 3715 11150 3714 11147 3712 11145
3705 11142 3705 11146 3707 11147 3710 11155
3711 11156
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
SW2 follow-up statements
262
WGUS75 KSLC 200309
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
909 PM MDT Mon Jul 19 2021
UTC025-200345-
/O.CON.KSLC.FF.W.0022.000000T0000Z-210720T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kane UT-
909 PM MDT Mon Jul 19 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM MDT THIS
EVENING FOR SOUTH CENTRAL KANE COUNTY...
At 909 PM MDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 0.75 and 1.1 inches of rain
have fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
the southern portions of Warm Creek and associated tributaries.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3715 11154 3715 11150 3714 11147 3712 11145
3705 11142 3705 11146 3707 11147 3710 11155
3711 11156
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
SW055
WGUS75 KSLC 200337
FFSSLC
Flash Flood Statement
National Weather Service Salt Lake City UT
937 PM MDT Mon Jul 19 2021
UTC025-200347-
/O.EXP.KSLC.FF.W.0022.000000T0000Z-210720T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kane UT-
937 PM MDT Mon Jul 19 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 945 PM MDT THIS EVENING FOR
SOUTH CENTRAL KANE COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed any road closures.
LAT...LON 3715 11154 3715 11150 3714 11147 3712 11145
3705 11142 3705 11146 3707 11147 3710 11155
3711 11156
$$
SWThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 6:01 PM MDT | Special Weather Statement | SLC | Tooele | 59 min |
| Jul 19, 6:10 PM MDT | Special Weather Statement | SLC | Juab | 65 min |
| Jul 19, 6:13 PM MDT | Special Weather Statement | SLC | Washington | 47 min |
| Jul 20, 12:11 PM MDT | Flash Flood Warning | SLC | Wayne | 3 hr |
| Jul 20, 1:18 PM MDT | Flash Flood Warning | SLC | Iron, Washington | 4 hr |
| Jul 20, 2:21 PM MDT | Special Weather Statement | SLC | Iron | 39 min |
| Jul 20, 3:26 PM MDT | Flash Flood Warning | SLC | Garfield, Kane | 6 hr |
| Jul 20, 3:41 PM MDT | Flash Flood Warning | SLC | Garfield, Kane | 3 hr |
| Jul 20, 4:03 PM MDT | Special Weather Statement | SLC | Sevier | 27 min |
| Jul 20, 4:58 PM MDT | Flash Flood Warning | SLC | Garfield | 3 hr |
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.