Alert archive / Utah / Flash Flood Warnings in 2012
Flash Flood Warning 11, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 16, 2012, 1:13 PM MDT for Washington County, Utah. It was in force for 11 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 16, 2012, 1:13 PM MDT (19:13 UTC)
- Expired
- Jul 17, 2012, 12:26 AM MDT
- In force
- 11 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), 77 km from the middle of the area, began a volume at 19:14 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, 7.2 hours before the alert went out and 206 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
- 610 J/kg
- Mixed-layer CIN
- -168 J/kg
- Mixed-layer LCL
- 1601 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
657 WGUS55 KSLC 161913 FFWSLC UTC053-170115- /O.NEW.KSLC.FF.W.0011.120716T1913Z-120717T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 113 PM MDT MON JUL 16 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 715 PM MDT * AT 106 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED HEAVY RAINFALL ACROSS PORTIONS OF THE FORT PEARCE WASH DRAINAGE AREA. RUNOFF FROM THIS HEAVY RAINFALL IS EXPECTED TO RESULT IN A FLASH FLOOD THROUGH THE FORT PEARCE WASH TO ITS CONFLUENCE WITH THE VIRGIN RIVER NEAR ST GEORGE. 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 3708 11357 3703 11310 3700 11310 3700 11355 $$ MPS
4 follow-up statements
321 WGUS75 KSLC 162136 FFSSLC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 336 PM MDT MON JUL 16 2012 UTC053-170115- /O.CON.KSLC.FF.W.0011.000000T0000Z-120717T0115Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WASHINGTON UT- 336 PM MDT MON JUL 16 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM MDT FOR FORT PEARCE WASH IN SOUTH CENTRAL WASHINGTON COUNTY... EXCESSIVE RUNOFF FROM EARLIER HEAVY RAINFALL CONTINUES TO MAKE ITS WAY THROUGH FORT PEARCE WASH. THIS WILL CONTINUE THROUGH THE REMAINDER OF THE AFTERNOON UNTIL THIS RUNOFF REACHES THE CONFLUENCE WITH THE VIRGIN RIVER. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. && LAT...LON 3708 11357 3703 11310 3700 11310 3700 11355 $$ MPS
390 WGUS55 KSLC 170109 FFWSLC UTC053-170715- /O.EXT.KSLC.FF.W.0011.000000T0000Z-120717T0715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 709 PM MDT MON JUL 16 2012 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS EXTENDED THE * FLASH FLOOD WARNING FOR... THE FORT PEARCE WASH IN SOUTH CENTRAL WASHINGTON COUNTY IN UTAH * UNTIL 115 AM MDT TUESDAY * EXCESSIVE RUNOFF FROM EARLIER HEAVY RAINFALL CONTINUES TO WORK ITS WAY THROUGH THE FORT PEARCE WASH...AND WILL CONTINUE TO RESULT IN FLASH FLOODING WITHIN THE WASH THROUGH THE REMAINDER OF THE EVENING. RADAR ESTIMATES INDICATE AS MUCH AS 3 INCHES OF RAIN FELL WITHIN PORTIONS OF THE WASH. * FLASH FLOODING CAN BE EXPECTED ALONG THE FORT PEARCE WASH ACROSS WASHINGTON COUNTY TO ITS CONFLUENCE WITH THE VIRGIN RIVER. 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 11357 3703 11310 3700 11310 3700 11355 $$ MPS
069 WGUS75 KSLC 170203 FFSSLC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 803 PM MDT MON JUL 16 2012 UTC053-170715- /O.CON.KSLC.FF.W.0011.000000T0000Z-120717T0715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WASHINGTON UT- 803 PM MDT MON JUL 16 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 115 AM MDT FOR FORT PEARCE WASH IN SOUTH CENTRAL WASHINGTON COUNTY... AT 755 PM MDT...A GAUGE ON THE FORT PEARCE WASH INDICATED A RISE OF OVER 8 FEET IN LESS THAN AN HOUR. THIS FLOOD WAVE WILL CONTINUE TO MOVE DOWN THE FORT PEARCE WASH TO THE CONFLUENCE WITH THE VIRGIN RIVER THROUGH THE REMAINDER OF THE EVENING. THIS THUNDERSTORM WITH EXCESSIVE RAIN WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. && LAT...LON 3708 11357 3703 11310 3700 11310 3700 11355 $$ MPS
153 WGUS75 KSLC 170626 FFSSLC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 1226 AM MDT TUE JUL 17 2012 UTC053-170633- /O.CAN.KSLC.FF.W.0011.000000T0000Z-120717T0715Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ WASHINGTON UT- 1226 AM MDT TUE JUL 17 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR SOUTH CENTRAL WASHINGTON COUNTY... WATER LEVELS IN THE FORT PEARCE WASH IN SOUTHERN WASHINGTON COUNTY HAVE FALLEN DOWN TO ONLY A SHALLOW FLOW AS OF MIDNIGHT. THEREFORE... THE FLASH FLOOD WARNING HAS BEEN CANCELLED. MONITOR NOAA WEATHER RADIO OR LOCAL TELEVISION OR RADIO FOR THE LATEST WEATHER INFORMATION. LAT...LON 3708 11357 3703 11310 3700 11310 3700 11355 $$ PW
The office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 6:20 PM MDT | Severe Thunderstorm Warning | SLC | Emery | 55 min |
| Jul 15, 8:06 PM MDT | Flash Flood Warning | SLC | Washington | 4 hr |
| Jul 16, 1:04 PM MDT | Flash Flood Warning | SLC | Wayne | 3 hr |
| Jul 16, 1:24 PM MDT | Special Weather Statement | SLC | Tooele | 66 min |
| Jul 16, 1:37 PM MDT | Severe Thunderstorm Warning | SLC | Kane | 38 min |
| Jul 16, 1:49 PM MDT | Flash Flood Warning | SLC | Kane, Washington | 4 hr |
| Jul 16, 2:00 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder, Tooele | 43 min |
| Jul 16, 2:20 PM MDT | Special Weather Statement | SLC | 70 min | |
| Jul 16, 2:26 PM MDT | Special Weather Statement | SLC | 49 min | |
| Jul 16, 2:33 PM MDT | Severe Thunderstorm Warning | SLC | Kane | 27 min |
| Jul 16, 2:55 PM MDT | Flash Flood Warning | SLC | Kane | 3 hr |
| Jul 16, 3:01 PM MDT | Special Weather Statement | SLC | 44 min | |
| Jul 16, 3:24 PM MDT | Special Weather Statement | SLC | Carbon | 51 min |
| Jul 16, 4:10 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 50 min |
| Jul 16, 4:38 PM MDT | Special Weather Statement | SLC | Weber | 67 min |
| Jul 16, 4:49 PM MDT | Special Weather Statement | SLC | 26 min | |
| Jul 16, 4:54 PM MDT | Flash Flood Warning | SLC | Utah | 50 min |
| Jul 16, 4:56 PM MDT | Severe Thunderstorm Warning | SLC | Washington | 49 min |
| Jul 16, 5:00 PM MDT | Special Weather Statement | SLC | Rich | 60 min |
| Jul 16, 5:01 PM MDT | Flash Flood Warning | SLC | Washington | 4 hr |
| Jul 16, 5:10 PM MDT | Severe Thunderstorm Warning | SLC | Salt Lake, Utah | 50 min |
| Jul 16, 5:19 PM MDT | Severe Thunderstorm Warning | SLC | Davis, Salt Lake, Tooele | 41 min |
| Jul 16, 5:22 PM MDT | Special Weather Statement | SLC | Cache | 38 min |
| Jul 16, 5:28 PM MDT | Flash Flood Warning | SLC | Kane, Washington | 6 hr |
| Jul 16, 5:54 PM MDT | Special Weather Statement | SLC | Davis, Salt Lake | 51 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.