Alert archive / Utah / Flash Flood Warnings in 2011
Flash Flood Warning 7, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 11, 2011, 1:35 PM MDT for Wayne County, Utah. It was in force for 4 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 11, 2011, 1:35 PM MDT (19:35 UTC)
- Expired
- Jul 11, 2011, 5:30 PM MDT
- In force
- 4 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), 160 km from the middle of the area, began a volume at 19:35 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, 7.6 hours before the alert went out and 257 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
- 171 J/kg
- Mixed-layer CIN
- -134 J/kg
- Mixed-layer LCL
- 1172 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 81 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
635 WGUS55 KSLC 111935 FFWSLC UTC055-112330- /O.NEW.KSLC.FF.W.0007.110711T1935Z-110711T2330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 135 PM MDT MON JUL 11 2011 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTH CENTRAL WAYNE COUNTY IN UTAH... THIS INCLUDES CAPITOL REEF NATIONAL PARK... * UNTIL 530 PM MDT * AT 128 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED HEAVY RAIN FROM A THUNDERSTORM OVER THE PARK. LOCATIONS IMPACTED INCLUDE THE FREMONT TRAIL...GRAND WASH TRAIL...AND SCENIC DRIVE. * RADAR ESTIMATES 0.75 TO 1 INCH OF RAIN HAS FALLEN ACROSS DRAINAGES LEADING INTO THE PARK OVER THE PAST HOUR. THUNDERSTORMS WILL CONTINUE TO BRING HEAVY RAIN TO THE AREA THROUGH AT LEAST 2 PM. RUNOFF FROM THIS RAINFALL WILL RESULT IN FLASH FLOODING. 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 3827 11130 3827 11114 3816 11114 3816 11122 $$ SEAMAN
2 follow-up statements
522 WGUS75 KSLC 112005 FFSSLC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 205 PM MDT MON JUL 11 2011 UTC055-112330- /O.CON.KSLC.FF.W.0007.000000T0000Z-110711T2330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WAYNE UT- 205 PM MDT MON JUL 11 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 PM MDT FOR SOUTH CENTRAL WAYNE COUNTY... AT 200 PM MDT...FLASH FLOODING HAS BEEN REPORTED ALONG SULPHUR CREEK WITHIN CAPITOL REEF NATIONAL PARK...AND THE SCENIC DRIVE HAS BEEN CLOSED. WATER HAS ALSO BEEN REPORTED FLOWING ACROSS SCENIC DRIVE BETWEEN THE VISITOR CENTER AND SLICKROCK DIVIDE. NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATES ONE HALF TO ONCE INCH OF RAIN HAS FALLEN ACROSS THE AREA. ALTHOUGH THE THUNDERSTORM WHICH PRODUCED THIS HEAVY RAINFALL HAS WEAKENED AND MOVED NORTH OF THE AREA...EXCESSIVE RUNOFF AND FLASH FLOODING WILL LIKELY PERSIST THROUGH 5 PM. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. && LAT...LON 3827 11130 3827 11114 3816 11114 3816 11122 $$ SEAMAN
337 WGUS75 KSLC 112333 FFSSLC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 533 PM MDT MON JUL 11 2011 UTC055-112343- /O.EXP.KSLC.FF.W.0007.000000T0000Z-110711T2330Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WAYNE UT- 533 PM MDT MON JUL 11 2011 ...THE FLASH FLOOD WARNING HAS EXPIRED FOR CAPITOL REEF NATIONAL PARK IN SOUTH CENTRAL WAYNE COUNTY... RUNOFF FROM EARLIER PRECIPITATION HAS DIMINISHED GREATLY AND RIVER AND STREAM LEVELS HAVE DECREASED. THEREFORE...THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE. MONITOR NOAA WEATHER RADIO OR LOCAL TELEVISION OR RADIO FOR THE LATEST WEATHER INFORMATION. LAT...LON 3827 11130 3827 11114 3816 11114 3816 11122 $$ SEAMAN
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 4:26 PM MDT | Special Weather Statement | SLC | 49 min |
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.