Alert archive / Utah / Flash Flood Warnings in 2011
Flash Flood Warning 50, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Sep 13, 2011, 5:44 PM MDT for Washington 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
- Sep 13, 2011, 5:44 PM MDT (23:44 UTC)
- Expired
- Sep 13, 2011, 8:45 PM MDT
- In force
- 3 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), 44 km from the middle of the area, began a volume at 23:48 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, 11.7 hours before the alert went out and 241 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
- 239 J/kg
- Mixed-layer CIN
- -98 J/kg
- Mixed-layer LCL
- 1707 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
528 WGUS55 KSLC 132344 FFWSLC UTC053-140245- /O.NEW.KSLC.FF.W.0050.110913T2344Z-110914T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 544 PM MDT TUE SEP 13 2011 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A * FLASH FLOOD WARNING FOR... EAST CENTRAL WASHINGTON COUNTY IN UTAH INCLUDING ZION NATIONAL PARK * UNTIL 845 PM MDT * AT 534 PM MDT...PARK RANGERS REPORTED FLASH FLOODING ALONG PINE CREEK AND CLEAR CREEK WITH WATER 7 TO 8 FEET DEEP. THIS DRAINAGE RUNS ALONG THE ROAD FROM THE EAST ENTRANCE OF THE PARK TOWARDS THE VISITORS CENTER. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ZION NATIONAL PARK AND SPRINGVILLE. HEAVY RAINS WILL CONTINUE ACROSS THIS AREA THROUGH AT LEAST 600 PM AND ADDITIONAL FLASH FLOODING IS LIKELY. 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. MOVE TO HIGHER GROUND. && LAT...LON 3731 11315 3731 11290 3712 11291 3709 11315 $$ PW
2 follow-up statements
488 WGUS75 KSLC 140127 FFSSLC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 727 PM MDT TUE SEP 13 2011 UTC053-140245- /O.CON.KSLC.FF.W.0050.000000T0000Z-110914T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WASHINGTON UT- 727 PM MDT TUE SEP 13 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 PM MDT FOR EAST CENTRAL WASHINGTON COUNTY... AT 717 PM MDT... HEAVY RAINS HAVE ENDING IN THE WARNING AREA AND THE THREAT OF ADDITIONAL HEAVY RAIN HAS DIMINISHED. HOWEVER...FLOODING IS STILL LIKELY OCCURRING ALONG STREAMS IN THE PINE CREEK DRAINAGE AS WELL AS ALONG THE NORTH FORK OF THE VIRGIN RIVER THROUGH THE LOWER PORTIONS OF ZION NATIONAL PARK. WATER LEVELS ARE EXPECTED TO FALL OVER THE NEXT HOUR OR TWO. LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ZION NATIONAL PARK PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. && LAT...LON 3731 11315 3731 11290 3712 11291 3709 11315 $$ PW
927 WGUS75 KSLC 140242 FFSSLC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 842 PM MDT TUE SEP 13 2011 UTC053-140248- /O.EXP.KSLC.FF.W.0050.000000T0000Z-110914T0245Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WASHINGTON UT- 842 PM MDT TUE SEP 13 2011 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 845 PM MDT FOR EAST CENTRAL WASHINGTON COUNTY... RUNOFF FROM EARLIER PRECIPITATION HAS DIMINISHED GREATLY AND RIVER AND STREAM LEVELS HAVE DECREASED. REPORTS INDICATE THAT FLOODING HAS ENDED. THEREFORE... THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE. SOME ADDITIONAL RAINFALL IS EXPECTED IN THIS AREA OVERNIGHT BUT THE THREAT OF RENEWED FLASH FLOODING FROM THIS IS VERY LOW. 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 3731 11315 3731 11290 3712 11291 3709 11315 $$ PW
Nearby
Flash Flood Warnings in Utah, 2011Every flash flood warning in 2011
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.