Alert archive / Utah / Flash Flood Warnings in 2012
Flash Flood Warning 44, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 10, 2012, 12:40 PM MDT for 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 10, 2012, 12:40 PM MDT (18:40 UTC)
- Expired
- Aug 10, 2012, 3:45 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
County Wayne County, UT
The radar
The Cedar City radar (KICX), 156 km from the middle of the area, began a volume at 18:41 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, 6.7 hours before the alert went out and 262 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
- 2532 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
671 WGUS55 KSLC 101840 FFWSLC UTC055-102145- /O.NEW.KSLC.FF.W.0044.120810T1840Z-120810T2145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 1240 PM MDT FRI AUG 10 2012 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL WAYNE COUNTY IN UTAH...INCLUDING CAPITOL REEF NATIONAL PARK * UNTIL 345 PM MDT * AT 1233 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED HEAVY RAIN FROM A THUNDERSTORM OVER SULPHUR CREEK DRAINAGE. * FLASH FLOODING IS EXPECTED ALONG SULPHUR CREEK FROM ITS HEADWATERS TO ITS CONFLUENCE WITH THE FREMONT RIVER IN CAPITOL REEF NATIONAL PARK. 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 3832 11135 3831 11130 3828 11129 3827 11135 $$ MPS
2 follow-up statements
043 WGUS75 KSLC 102000 FFSSLC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 200 PM MDT FRI AUG 10 2012 UTC055-102145- /O.CON.KSLC.FF.W.0044.000000T0000Z-120810T2145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WAYNE UT- 200 PM MDT FRI AUG 10 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 PM MDT FOR SULPHUR CREEK IN CAPITOL REEF NATIONAL PARK IN CENTRAL WAYNE COUNTY... AT 150 PM MDT...NATIONAL PARK SERVICE RANGERS IN CAPITOL REEF REPORTED SULPHUR CREEK WAS RISING RAPIDLY NEAR THE VISITOR CENTER...THAT FLASH FLOODING WAS LIKELY OCCURRING UPSTREAM ALONG THE CREEK...AND APPEARED IMMINENT ALONG SULPHUR CREEK NEAR THE VISITOR CENTER. THOSE PERSONS NEAR OR AROUND SULPHUR CREEK SHOULD MOVE TO HIGHER GROUND...AND STAY AWAY FROM THE CREEK. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. && LAT...LON 3832 11135 3831 11130 3828 11129 3827 11135 $$ MPS
547 WGUS75 KSLC 102142 FFSSLC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 342 PM MDT FRI AUG 10 2012 UTC055-102151- /O.EXP.KSLC.FF.W.0044.000000T0000Z-120810T2145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WAYNE UT- 342 PM MDT FRI AUG 10 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 345 PM MDT FOR SULPHUR CREEK WITHIN CAPITOL REEF NATIONAL PARK IN CENTRAL WAYNE COUNTY... RUNOFF FROM EARLIER PRECIPITATION HAS DIMINISHED GREATLY AND RIVER AND STREAM LEVELS HAVE DECREASED. ADDITIONAL RAINFALL WILL CONTINUE TO ALLOW THE CREEK TO RUN HIGH...HOWEVER ADDITIONAL FLASH FLOODING IS NOT ANTICIPATED. THEREFORE...THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE. MONITOR NOAA WEATHER RADIO OR LOCAL TELEVISION OR RADIO FOR THE LATEST WEATHER INFORMATION. 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 3832 11135 3831 11130 3828 11129 3827 11135 $$ MPS
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 12:29 PM MDT | Flash Flood Warning | SLC | Emery | 3 hr |
| Aug 10, 1:25 PM MDT | Flash Flood Warning | SLC | Wayne | 3 hr |
| Aug 10, 4:17 PM MDT | Special Weather Statement | SLC | Emery | 43 min |
| Aug 10, 4:45 PM MDT | Special Weather Statement | SLC | Tooele | 60 min |
| Aug 10, 5:51 PM MDT | Special Weather Statement | SLC | Davis | 69 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.