Alert archive / Utah / Flash Flood Warnings in 2011
Flash Flood Warning 27, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 4, 2011, 3:28 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
- Aug 4, 2011, 3:28 PM MDT (21:28 UTC)
- Expired
- Aug 4, 2011, 7:54 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), 162 km from the middle of the area, began a volume at 21:29 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, 9.5 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
- 186 J/kg
- Mixed-layer CIN
- -129 J/kg
- Mixed-layer LCL
- 1273 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
824 WGUS55 KSLC 042128 FFWSLC UTC055-050230- /O.NEW.KSLC.FF.W.0027.110804T2128Z-110805T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 328 PM MDT THU AUG 4 2011 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A * FLASH FLOOD WARNING FOR... WESTERN WAYNE COUNTY IN UTAH INCLUDING CAPITOL REEF NATIONAL PARK BICKNELL AND TORREY * UNTIL 830 PM MDT * AT 319 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED HEAVY RAIN FROM A THUNDERSTORM OVER THE WARNED AREA. 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. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS. && LAT...LON 3843 11114 3818 11111 3831 11158 3845 11152 $$ STRUTHWOLF
2 follow-up statements
265 WGUS75 KSLC 042352 FFSSLC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 552 PM MDT THU AUG 4 2011 UTC055-050230- /O.CON.KSLC.FF.W.0027.000000T0000Z-110805T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WAYNE UT- 552 PM MDT THU AUG 4 2011 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM MDT FOR WESTERN WAYNE COUNTY... THIS INCLUDES THE NORTHERN PORTION OF CAPITOL REEF NATIONAL PARK. AT 538 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT SHOWERS AND THUNDERSTORMS WERE DIMINISHING ACROSS THE AREA. HOWEVER...HEAVY RAINFALL AMOUNTS IN EXCESS OF 3 INCHES OCCURRED ACROSS THE HEAD WATERS OF THE FREMONT RIVER AND ALSO ACROSS THE UPPER REACHES OF SPRING AND DEEP CREEK DRAINAGES. RUNOFF FROM THESE EARLIER HEAVY RAINS IS EXPECTED TO CONTINUE THROUGH 830 PM. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. && LAT...LON 3843 11114 3818 11111 3831 11158 3845 11152 $$ STRUTHWOLF
382 WGUS75 KSLC 050154 FFSSLC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 754 PM MDT THU AUG 4 2011 UTC055-050200- /O.CAN.KSLC.FF.W.0027.000000T0000Z-110805T0230Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WAYNE UT- 754 PM MDT THU AUG 4 2011 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR WESTERN WAYNE COUNTY... THE THUNDERSTORMS THAT BROUGHT HEAVY RAIN IN EXCESS OF 3 INCHES TO THE HEADWATERS OF THE FREMONT RIVER AND ALSO ACROSS THE SAND AND DEEP CREEK DRAINAGES NEAR AND IN THE NORTHERN PORTION OF CAPITOL REEF NATIONAL PARK HAVE ALL BUT ENDED. HOWEVER...TRAVELERS IN THE AREA SHOULD EXERCISE CAUTION AS SOME ROADS MAY HAVE HAD MUD AND DEBRIS STREWN ACROSS THEM. LAT...LON 3843 11114 3818 11111 3831 11158 3845 11152 $$ STRUTHWOLF
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 6:26 PM MDT | Special Weather Statement | SLC | Piute | 34 min |
| Aug 3, 8:54 PM MDT | Special Weather Statement | SLC | Piute | 21 min |
| Aug 3, 10:26 PM MDT | Flash Flood Warning | SLC | Piute, Sevier | 3 hr |
| Aug 4, 2:31 PM MDT | Severe Thunderstorm Warning | SLC | Juab, Utah | 29 min |
| Aug 4, 3:14 PM MDT | Flash Flood Warning | SLC | Piute | 3 hr |
| Aug 4, 3:27 PM MDT | Severe Thunderstorm Warning | SLC | Salt Lake | 32 min |
| Aug 4, 3:31 PM MDT | Severe Thunderstorm Warning | SLC | Duchesne | 59 min |
| Aug 4, 3:41 PM MDT | Severe Thunderstorm Warning | SLC | Utah | 64 min |
| Aug 4, 3:44 PM MDT | Flash Flood Warning | SLC | Garfield, Piute | 117 min |
| Aug 4, 3:58 PM MDT | Flash Flood Warning | SLC | Wayne | 2 hr |
| Aug 4, 4:07 PM MDT | Severe Thunderstorm Warning | SLC | Salt Lake, Utah | 38 min |
| Aug 4, 4:11 PM MDT | Severe Thunderstorm Warning | SLC | Duchesne, Wasatch | 36 min |
| Aug 4, 4:43 PM MDT | Severe Thunderstorm Warning | SLC | Juab | 62 min |
| Aug 4, 4:56 PM MDT | Severe Thunderstorm Warning | SLC | Emery | 34 min |
| Aug 4, 5:27 PM MDT | Severe Thunderstorm Warning | SLC | Utah | 63 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.