Alert archive / Utah / Flash Flood Warnings in 2012
Flash Flood Warning 24, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 24, 2012, 2:44 PM MDT for Washington County, Utah. It was in force for 6 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 24, 2012, 2:44 PM MDT (20:44 UTC)
- Expired
- Jul 24, 2012, 8:45 PM MDT
- In force
- 6 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
County Washington County, UT
The radar
The Cedar City radar (KICX), 82 km from the middle of the area, began a volume at 20:46 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
Las Vegas, NV (KVEF), launched 12:00Z, 8.7 hours before the alert went out and 198 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
- 2422 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
969
WGUS55 KSLC 242044
FFWSLC
UTC053-250245-
/O.NEW.KSLC.FF.W.0024.120724T2044Z-120725T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
244 PM MDT TUE JUL 24 2012
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
THE FORT PEARCE WASH IN SOUTH CENTRAL WASHINGTON COUNTY IN UTAH
* UNTIL 845 PM MDT
* AT 242 PM MDT...HEAVY RAINFALL HAS CONTINUED OVER THE FORT PEARCE
WASH DRAINAGE BASIN OVER THE PAST SEVERAL HOURS.
* FLASH FLOODING REMAINS LIKELY ALONG THE FORT PEARCE WASH IN SOUTH
CENTRAL WASHINGTON COUNTY. THE FORT PEARCE GAGE SOUTH OF ST GEORGE
IS CURRENTLY MEASURING FLOW AT AROUND 633 CUBIC FEET PER SECOND OR
CFS. FLOW HAS INCREASED OVER THE PAST HOUR AND THIS IS EXPECTED TO
CONTINUE OVER THE NEXT SEVERAL HOURS.
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.
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. MOVE TO HIGHER GROUND.
&&
LAT...LON 3708 11359 3708 11354 3703 11349 3701 11331
3699 11332 3699 11353
$$
KRUSE1 follow-up statement
376
WGUS75 KSLC 250238
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
838 PM MDT TUE JUL 24 2012
UTC053-250246-
/O.EXP.KSLC.FF.W.0024.000000T0000Z-120725T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WASHINGTON UT-
838 PM MDT TUE JUL 24 2012
...THE FLASH FLOOD WARNING FOR THE FORT PEARCE WASH IN SOUTH CENTRAL
WASHINGTON COUNTY WILL EXPIRE AT 845 PM MDT...
RIVER GAUGES ON THE FORT PEARCE WASH INDICATE WATER LEVELS HAVE
RECEDED...THUS THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
LAT...LON 3708 11359 3708 11354 3703 11349 3701 11331
3699 11332 3699 11353
$$
MPSThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 8:58 AM MDT | Flash Flood Warning | SLC | Washington | 6 hr |
| Jul 24, 12:56 PM MDT | Flash Flood Warning | SLC | Garfield | 3 hr |
| Jul 24, 1:28 PM MDT | Flash Flood Warning | SLC | Wayne | 4 hr |
| Jul 24, 1:34 PM MDT | Special Weather Statement | SLC | Washington | 41 min |
| Jul 24, 1:45 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 18 min |
| Jul 24, 3:18 PM MDT | Special Weather Statement | SLC | Iron | 42 min |
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.