Alert archive / Utah / Flash Flood Warnings in 2012
Flash Flood Warning 51, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 19, 2012, 4:39 PM MDT for Garfield 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 19, 2012, 4:39 PM MDT (22:39 UTC)
- Expired
- Aug 19, 2012, 7:30 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
County Garfield County, UT
The radar
The Cedar City radar (KICX), 139 km from the middle of the area, began a volume at 22:39 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
Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 10.7 hours before the alert went out and 270 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
- 155 J/kg
- Mixed-layer CIN
- -108 J/kg
- Mixed-layer LCL
- 1712 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -30 m²/s²
- 0-3 km storm-relative helicity
- -32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
237 WGUS55 KSLC 192239 FFWSLC UTC017-200130- /O.NEW.KSLC.FF.W.0051.120819T2239Z-120820T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 439 PM MDT SUN AUG 19 2012 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTH CENTRAL GARFIELD COUNTY IN UTAH...INCLUDING THE EGYPT 3 SLOT CANYON AND 25 MILE WASH * UNTIL 730 PM MDT * AT 430 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM OVER THE 25 MILE WASH INCLUDING EGYPT 3 AND OTHER SLOT CANYONS IN THE AREA. * RADAR ESTIMATES INDICATE RAINFALL TOTAL IN EXCESS OF 2 INCHES HAVE FALLEN THUS FAR...WITH ADDITIONAL HEAVY RAIN EXPECTED THROUGH AT LEAST 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 3766 11138 3770 11125 3754 11106 3754 11135 $$ MPS
2 follow-up statements
707 WGUS75 KSLC 192354 FFSSLC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 554 PM MDT SUN AUG 19 2012 UTC017-200130- /O.CON.KSLC.FF.W.0051.000000T0000Z-120820T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ GARFIELD UT- 554 PM MDT SUN AUG 19 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM MDT FOR 25 MILE WASH...EGYPT 3 SLOT CANYON...AND OTHER SLOT CANYONS IN SOUTH CENTRAL GARFIELD COUNTY... AT 550 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATED A WIDESPREAD 1 TO 2 INCHES OF RAIN HAS FALLEN ACROSS THE AREA SINCE 4 PM. RUNOFF FROM THIS RAINFALL IS LIKELY RESULTING IN A SIGNIFICANT FLASH FLOOD ALONG 25 MILE WASH...AS WELL AS ALL SLOT CANYONS IN THE AREA INCLUDING EGYPT 3. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. && LAT...LON 3766 11138 3770 11125 3754 11106 3754 11135 $$ MPS
222 WGUS75 KSLC 200124 FFSSLC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 724 PM MDT SUN AUG 19 2012 UTC017-200132- /O.EXP.KSLC.FF.W.0051.000000T0000Z-120820T0130Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ GARFIELD UT- 724 PM MDT SUN AUG 19 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 730 PM MDT FOR 25 MILE WASH...EGYPT 3 SLOT CANYON...AND OTHER SLOT CANYONS IN SOUTH CENTRAL GARFIELD COUNTY... RUNOFF FROM EARLIER PRECIPITATION HAS LIKELY MADE IT THROUGH 25 MILE WASH AND INTO THE ESCALANTE RIVER...THUS THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE. RADAR ESTIMATES 1 TO 2 INCHES OF RAIN FELL ACROSS THE 25 MILE WASH EARLIER SUNDAY AFTERNOON. 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 3766 11138 3770 11125 3754 11106 3754 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 19, 2:53 AM MDT | Flash Flood Watch | SLC | 19 hr | |
| Aug 19, 2:41 PM MDT | Flash Flood Warning | SLC | Kane | 9 hr |
| Aug 19, 3:52 PM MDT | Flash Flood Warning | SLC | Kane | 4 hr |
| Aug 19, 4:29 PM MDT | Flash Flood Warning | SLC | Washington | 3 hr |
| Aug 19, 4:59 PM MDT | Flash Flood Warning | SLC | Kane, Washington | 4 hr |
| Aug 19, 5:38 PM MDT | Flash Flood Warning | SLC | Washington | 4 hr |
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.