Alert archive / Utah / Flash Flood Warnings in 2012
Flash Flood Warning 49, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 19, 2012, 3:52 PM MDT for Kane 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 19, 2012, 3:52 PM MDT (21:52 UTC)
- Expired
- Aug 19, 2012, 7:45 PM MDT
- In force
- 4 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
County Kane County, UT
The radar
The Cedar City radar (KICX), 69 km from the middle of the area, began a volume at 21:56 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, 9.9 hours before the alert went out and 217 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.
049 WGUS55 KSLC 192152 FFWSLC UTC025-200145- /O.NEW.KSLC.FF.W.0049.120819T2152Z-120820T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 352 PM MDT SUN AUG 19 2012 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTH CENTRAL KANE COUNTY IN UTAH...INCLUDING THE CITY OF KANAB...ALONG WITH KANAB CREEK AND JOHNSON WASH * UNTIL 745 PM MDT * AT 347 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED HEAVY RAIN FROM A THUNDERSTORM OVER THE WARNED AREA. RADAR ESTIMATES OF 0.75 TO 1 INCH HAVE FALLEN AROUND KANAB EASTWARD INTO THE JOHNSON WASH. * ADDITIONAL HEAVY RAINFALL IS EXPECTED IN AND AROUND KANAB AS WELL AS THE JOHNSON WASH EAST OF KANAB 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 3728 11220 3700 11208 3700 11258 3713 11258 $$ MPS
2 follow-up statements
930 WGUS75 KSLC 192304 FFSSLC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 504 PM MDT SUN AUG 19 2012 UTC025-200145- /O.CON.KSLC.FF.W.0049.000000T0000Z-120820T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ KANE UT- 504 PM MDT SUN AUG 19 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM MDT FOR SOUTH CENTRAL KANE COUNTY INCLUDING KANAB...KANAB CREEK AND JOHNSON WASH... AT 500 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 1 TO 2 INCHES OF RAIN HAS FALLEN IN AND AROUND THE KANAB AREA SINCE 3 PM. THUNDERSTORMS HAVE GENERALLY WEAKENED ACROSS THE AREA...HOWEVER EXCESS RUNOFF FROM THIS HEAVY RAINFALL IS LIKELY STILL MAKING ITS WAY THROUGH KANAB CREEK AND JOHNSON WASH...AND WILL CONTINUE TO DO SO THROUGH EARLY EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. && LAT...LON 3728 11220 3700 11208 3700 11258 3713 11258 $$ MPS
322 WGUS75 KSLC 200139 FFSSLC FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 739 PM MDT SUN AUG 19 2012 UTC025-200148- /O.EXP.KSLC.FF.W.0049.000000T0000Z-120820T0145Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ KANE UT- 739 PM MDT SUN AUG 19 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 745 PM MDT FOR AREAS AROUND KANAB IN SOUTH CENTRAL KANE 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. 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 3728 11220 3700 11208 3700 11258 3713 11258 $$ 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, 4:29 PM MDT | Flash Flood Warning | SLC | Washington | 3 hr |
| Aug 19, 4:39 PM MDT | Flash Flood Warning | SLC | Garfield | 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.