Alert archive / Utah / Flash Flood Warnings in 2011
Flash Flood Warning 21, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 1, 2011, 3:07 PM MDT for Garfield County, Wayne 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 1, 2011, 3:07 PM MDT (21:07 UTC)
- Expired
- Aug 1, 2011, 6:00 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
Counties Garfield County, UT, Wayne County, UT
The radar
The Cedar City radar (KICX), 158 km from the middle of the area, began a volume at 21:09 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, 9.1 hours before the alert went out and 259 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
- 8 J/kg
- Mixed-layer CIN
- -145 J/kg
- Mixed-layer LCL
- 1422 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 101 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
578
WGUS55 KSLC 012107
FFWSLC
UTC017-055-020000-
/O.NEW.KSLC.FF.W.0021.110801T2107Z-110802T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
307 PM MDT MON AUG 1 2011
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTH CENTRAL GARFIELD COUNTY IN UTAH...
SOUTH CENTRAL WAYNE COUNTY IN UTAH...
* UNTIL 600 PM MDT
* AT 300 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
FLASH FLOODING FROM A THUNDERSTORM OVER PLEASANT CREEK AND BURRO
WASH IN CAPITOL REEF NATIONAL PARK.
* CAPITOL REEF NATIONAL PARK IS A VERY FLASH FLOOD PRONE AREA...AND
ANYONE VENTURING INTO THESE DRAINAGES NEEDS TO BE AWARE OF 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 3812 11139 3820 11132 3826 11113 3829 11104
3819 11103 3807 11107 3802 11109 3801 11120
3803 11134
$$
MCINERNEY1 follow-up statement
829
WGUS75 KSLC 012355
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
555 PM MDT MON AUG 1 2011
UTC017-055-020004-
/O.EXP.KSLC.FF.W.0021.000000T0000Z-110802T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GARFIELD UT-WAYNE UT-
555 PM MDT MON AUG 1 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 600 PM MDT FOR THE BURRO
AND PLEASANT CREEK DRAINAGES IN CAPITOL REEF NATIONAL PARK...
THUNDERSTORM ACTIVITY IN THE AREA HAS MOVED TO THE EAST...AND FLOOD
WATERS HAVE ATTENUATED. AS A RESULT...THE FLASH FLOOD WARNING HAS
BEEN ALLOWED TO EXPIRE.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
LAT...LON 3812 11139 3820 11132 3826 11113 3829 11104
3819 11103 3807 11107 3802 11109 3801 11120
3803 11134
$$
MCINERNEYThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 6:21 PM MDT | Flash Flood Warning | SLC | Kane | 3 hr |
| Aug 1, 6:59 AM MDT | Areal Flood Advisory | SLC | Box Elder, Cache, Davis, Weber | 2 hr |
| Aug 1, 3:35 PM MDT | Flash Flood Warning | SLC | Garfield, Wayne | 3 hr |
| Aug 1, 5:39 PM MDT | Severe Thunderstorm Warning | SLC | Box Elder | 36 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.