Alert archive / Utah / Flash Flood Warnings in 2011
Flash Flood Warning 31, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 15, 2011, 6:38 PM MDT for Garfield County, Wayne County, Utah. It was in force for 6 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 15, 2011, 6:38 PM MDT (00:38 UTC)
- Expired
- Aug 16, 2011, 12:30 AM MDT
- In force
- 6 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), 205 km from the middle of the area, began a volume at 00:40 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 00:00Z, 0.6 hours before the alert went out and 213 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
- 289 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 2697 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- -11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
048
WGUS55 KSLC 160038
FFWSLC
UTC017-055-160630-
/O.NEW.KSLC.FF.W.0031.110816T0038Z-110816T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
638 PM MDT MON AUG 15 2011
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
THE FREMONT RIVER BELOW CAINEVILLE AND THE DIRTY DEVIL RIVER FROM
HANKSVILLE TO HITE MARINA
NORTHEASTERN GARFIELD COUNTY IN UTAH
CENTRAL WAYNE COUNTY IN UTAH
* UNTIL 1230 AM MDT
* AT 617 PM MDT...PARK OFFICIALS IN CAPITOL REEF NATIONAL PARK
REPORTED FLASH FLOODING FROM A THUNDERSTORM THAT PASSED OVER THE
AREA EARLIER THIS AFTERNOON. A RIVER GAUGE ON THE FREMONT RIVER IN
CAINEVILLE HAS SHOWN A RISE IN RIVER FLOW TO JUST OVER 3000
CUBIC FEET PER SECOND /CFS/...FLOW PRIOR TO FLASH FLOOD EARLIER
TODAY WAS 45 CFS. THIS FLASH FLOOD IS EXPECTED TO CONTINUE
DOWNSTREAM TO THE CONFLUENCE OF THE DIRTY DEVIL RIVER...THEN
CONTINUE DOWN THE DIRTY DEVIL RIVER TO WHERE IT DRAINS INTO LAKE
POWELL NEAR HITE MARINA.
* THIS IS A LARGE AND DANGEROUS FLASH FLOOD.
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.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
&&
LAT...LON 3835 11104 3839 11074 3843 11067 3836 11053
3814 11037 3788 11037 3789 11040 3813 11044
3838 11068 3834 11079 3831 11101
$$
MERRILL2 follow-up statements
506
WGUS75 KSLC 160335
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
935 PM MDT MON AUG 15 2011
UTC017-055-160630-
/O.CON.KSLC.FF.W.0031.000000T0000Z-110816T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GARFIELD UT-WAYNE UT-
935 PM MDT MON AUG 15 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1230 AM MDT FOR
CENTRAL WAYNE AND NORTHEASTERN GARFIELD COUNTIES...
AT 924 PM MDT...THE FREMONT RIVER AT CAINEVILLE HAS PEAKED AT A FLOW
OF 5221 CUBIC FEET PER SECOND. ALTHOUGH THE FREMONT IS CURRENTLY
RECEDING...FLOWS WILL REMAIN ELEVATED THROUGH LATE THIS EVENING. THE
WATER FROM THE FREMONT WILL FLOW INTO THE DIRTY DEVIL RIVER. THE
WATER LEVEL AT THE DIRTY DEVIL AT POISON SPRINGS IS CURRENTLY
RISING...AND THE FLOW ALONG THE DIRTY DEVIL WILL REMAIN ELEVATED
THROUGH MIDNIGHT TONIGHT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 3835 11104 3839 11074 3843 11067 3836 11053
3814 11037 3788 11037 3789 11040 3813 11044
3838 11068 3834 11079 3831 11101
$$
LC553
WGUS75 KSLC 160630
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1230 AM MDT TUE AUG 16 2011
UTC017-055-160640-
/O.EXP.KSLC.FF.W.0031.000000T0000Z-110816T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GARFIELD UT-WAYNE UT-
1230 AM MDT TUE AUG 16 2011
...THE FLASH FLOOD WARNING HAS EXPIRED FOR CENTRAL WAYNE AND
NORTHEASTERN GARFIELD COUNTIES...
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.
LAT...LON 3835 11104 3839 11074 3843 11067 3836 11053
3814 11037 3788 11037 3789 11040 3813 11044
3838 11068 3834 11079 3831 11101
$$
MPSThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 15, 6:01 PM MDT | Severe Thunderstorm Warning | SLC | Carbon, Duchesne | 44 min |
| Aug 15, 6:09 PM MDT | Special Weather Statement | SLC | Utah | 6 min |
| Aug 15, 6:37 PM MDT | Special Weather Statement | SLC | Duchesne | 38 min |
| Aug 15, 7:09 PM MDT | Severe Thunderstorm Warning | SLC | Duchesne | 51 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.