Alert archive / Utah / Flash Flood Warnings in 2012
Flash Flood Warning 54, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 20, 2012, 5:13 PM MDT for Kane County, Utah. It was in force for 7 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 20, 2012, 5:13 PM MDT (23:13 UTC)
- Expired
- Aug 21, 2012, 12:15 AM MDT
- In force
- 7 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
County Kane County, UT
The radar
The Cedar City radar (KICX), 94 km from the middle of the area, began a volume at 23:14 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 12:00Z, 11.2 hours before the alert went out and 210 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
- 808 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 974 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 41 m²/s²
- 0-3 km storm-relative helicity
- 5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
649
WGUS55 KSLC 202313
FFWSLC
UTC025-210615-
/O.NEW.KSLC.FF.W.0054.120820T2313Z-120821T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
513 PM MDT MON AUG 20 2012
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTH CENTRAL KANE COUNTY IN UTAH INCLUDING THE PARIA RIVER AND
BUCKSKIN GULCH.
* UNTIL 1215 AM MDT
* AT 510 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN HAS FALLEN ACROSS THE PARIA AND BUCKSKIN GULCH
DRAINAGES...RESULTING FROM MULTIPLE THUNDERSTORMS MOVING ACROSS
THE SAME AREA.
* THESE STORMS ARE EXPECTED TO CONTINUE REDEVELOPING AND MOVING
ACROSS SOUTH CENTRAL KANE COUNTY THROUGH AT LEAST 6 PM...BRINGING
ADDITIONAL HEAVY RAIN TO THE PARIA AND BUCKSKIN GULCH AREAS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 3700 11201 3723 11219 3730 11200 3726 11190
3700 11184 3700 11193
$$
MPS1 follow-up statement
377
WGUS75 KSLC 210208
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
808 PM MDT MON AUG 20 2012
UTC025-210615-
/O.CON.KSLC.FF.W.0054.000000T0000Z-120821T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KANE UT-
808 PM MDT MON AUG 20 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1215 AM MDT FOR
SOUTH CENTRAL KANE COUNTY...
AT 800 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATED
0.75 TO 1.25 INCHES OF RAIN HAD FALLEN LATE MONDAY AFTERNOON ACROSS
THE HEADWATERS OF THE PARIA RIVER DRAINAGE...PRIMARILY ACROSS
COTTONWOOD CANYON. THIS RAINFALL HAS ENDED...HOWEVER EXCESSIVE
RUNOFF FROM THIS RAINFALL IS LIKELY MAKING ITS WAY DOWN THE PARIA
RIVER...AND SHOULD PASS UNDER THE HIGHWAY 89 BRIDGE BY 10 PM.
PEOPLE ARE STRONGLY ENCOURAGED TO STAY AWAY FROM THE PARIA RIVER
THIS EVENING AS THIS FLOOD MAKES ITS WAY DOWNSTREAM.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 3700 11201 3723 11219 3730 11200 3726 11190
3700 11184 3700 11193
$$
MPSThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 4:54 AM MDT | Flash Flood Watch | SLC | 15 hr | |
| Aug 20, 3:06 PM MDT | Red Flag Warning | SLC | Box Elder, Davis, Juab, Millard, Salt Lake, Sanpete and 2 more | 33 hr |
Nearby
Flash Flood Warnings in Utah, 2012Every flash flood warning in 2012
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.