Alert archive / Utah / Flash Flood Warnings in 2012
Flash Flood Warning 58, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 23, 2012, 12:45 PM MDT for Garfield 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 23, 2012, 12:45 PM MDT (18:45 UTC)
- Expired
- Aug 23, 2012, 3:45 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
Counties Garfield County, UT, Wayne County, UT
The radar
The Cedar City radar (KICX), 158 km from the middle of the area, began a volume at 18:49 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, 6.8 hours before the alert went out and 261 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
- 191 J/kg
- Mixed-layer CIN
- -77 J/kg
- Mixed-layer LCL
- 1007 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
124
WGUS55 KSLC 231845
FFWSLC
UTC017-055-232145-
/O.NEW.KSLC.FF.W.0058.120823T1845Z-120823T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1245 PM MDT THU AUG 23 2012
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTH CENTRAL GARFIELD COUNTY IN UTAH
SOUTH CENTRAL WAYNE COUNTY IN UTAH INCLUDING SHEETS GULCH IN
CAPITOL REEF NATIONAL PARK.
* UNTIL 345 PM MDT
* AT 1240 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN FROM A THUNDERSTORM OVER THE CENTRAL PORTION OF CAPITOL
REEF NATIONAL PARK. THIS WARNING INCLUDES SHEETS GULCH AND PORTIONS
OF THE NOTOM ROAD.
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.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
&&
LAT...LON 3803 11123 3818 11125 3820 11108 3798 11103
3793 11118
$$
NH1 follow-up statement
113
WGUS75 KSLC 232139
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
339 PM MDT THU AUG 23 2012
UTC017-055-232146-
/O.EXP.KSLC.FF.W.0058.000000T0000Z-120823T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GARFIELD UT-WAYNE UT-
339 PM MDT THU AUG 23 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 345 PM MDT FOR SOUTH
CENTRAL WAYNE AND NORTH CENTRAL GARFIELD COUNTIES...
THE RAINFALL OVER THE SOUTHERN END OF CAPITOL REEF NATIONAL PARK HAS
DIMINISHED...AS A RESULT THE FLASH FLOOD WARNING FOR THIS AREA HAS
BEEN ALLOWED TO EXPIRE.
ALTHOUGH RAINFALL HAS TEMPORARILY MOVED ON...IT IS ANTICIPATED THAT
ADDITIONAL STORMS WILL MOVE THROUGH THIS AREA PROVIDING ADDITIONAL
WATER FOR HEIGHTENED FLOWS THROUGH THE DRAINAGES.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
LAT...LON 3803 11123 3818 11125 3820 11108 3798 11103
3793 11118
$$
MCINERNEYThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 11:59 AM MDT | Flash Flood Warning | SLC | Sevier, Wayne | 3 hr |
| Aug 23, 2:52 PM MDT | Flash Flood Warning | SLC | Kane, San Juan | 6 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.