Alert archive / Utah / Flash Flood Warnings in 2011
Flash Flood Warning 41, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 25, 2011, 3:25 PM MDT for Wayne County, Utah. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 25, 2011, 3:25 PM MDT (21:25 UTC)
- Expired
- Aug 25, 2011, 6:15 PM MDT
- In force
- 3 hr
- Issued by
- NWS Salt Lake City, UT
- Area
- Storm-based polygon
- Flood severity
- None
County Wayne County, UT
The radar
The Cedar City radar (KICX), 161 km from the middle of the area, began a volume at 21:27 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 25, 4:40 PM MDT | FLASH FLOOD | Capitol Reef Np, UT | FLASH FLOOD IN SULPHER CREEK. WATER WAS 4-5 FT DEEP AT THE VISITOR CENTER. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Grand Junction, CO (KGJT), launched 12:00Z, 9.4 hours before the alert went out and 256 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2687 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
288
WGUS55 KSLC 252125
FFWSLC
UTC055-260015-
/O.NEW.KSLC.FF.W.0041.110825T2125Z-110826T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
325 PM MDT THU AUG 25 2011
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL WAYNE COUNTY IN UTAH...SPECIFICALLY SULPHER CREEK IN
CAPITOL REEF NATIONAL PARK.
* UNTIL 615 PM MDT
* AT 318 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN FROM A THUNDERSTORM ACROSS THE HEADWATERS OF SULPHER
CREEK IN CAPITOL REEF NATIONAL PARK. RAINFALL ESTIMATES OF .50-.75
INCHES OF RAINFALL HAS OCCURRED OVER THE LAST HOUR FROM THIS
STORM...AND ADDITIONAL RAINFALL IS EXPECTED. RAINFALL OF THIS
INTENSITY HAS PRODUCED FLASH FLOODING ALONG THIS CREEK IN RECENT
WEEKS. ADDITIONAL TO THE FLASH FLOODING MENTIONED ABOVE...RAPID
RISES TO THE FREMONT RIVER ARE POSSIBLE WITHIN CAPITOL REEF
NATIONAL PARK.
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.
TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN SALT
LAKE CITY.
&&
LAT...LON 3834 11138 3839 11130 3829 11108 3825 11110
3826 11134
$$
MERRILL2 follow-up statements
804
WGUS75 KSLC 252257
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
457 PM MDT THU AUG 25 2011
UTC055-260015-
/O.CON.KSLC.FF.W.0041.000000T0000Z-110826T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WAYNE UT-
457 PM MDT THU AUG 25 2011
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM MDT FOR
CENTRAL WAYNE COUNTY...SPECIFICALLY SULPHER CREEK IN CAPITOL REEF
NATIONAL PARK.
AT 440 PM MDT...LOCAL LAW ENFORCEMENT OFFICIALS IN CAPITOL REEF
NATIONAL PARK REPORTED THAT AN EARLIER THUNDERSTORM PRODUCED FLASH
FLOODING ON SULPHER CREEK NEAR THE VISITOR CENTER. THIS FLOOD WILL
CONTINUE TO WORK DOWNSTREAM AND DRAIN INTO THE FREMONT RIVER THROUGH
615 PM MDT. AREAS DOWNSTREAM ALONG THE FREMONT RIVER BETWEEN CAPITOL
REEF NATIONAL PARK AND CAINEVILLE CAN EXPECT A BRIEF RISE TO THE
THAT RIVER.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 3834 11138 3839 11130 3829 11108 3825 11110
3826 11134
$$
MERRILL318
WGUS75 KSLC 260014
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
614 PM MDT THU AUG 25 2011
UTC055-260022-
/O.EXP.KSLC.FF.W.0041.000000T0000Z-110826T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WAYNE UT-
614 PM MDT THU AUG 25 2011
...THE FLASH FLOOD WARNING WILL EXPIRE AT 615 PM MDT FOR CENTRAL
WAYNE COUNTY...SPECIFICALLY SULPHER CREEK IN CAPITOL REEF NATIONAL
PARK.
RUNOFF FROM EARLIER PRECIPITATION HAS DIMINISHED GREATLY AND RIVER
AND STREAM LEVELS HAVE DECREASED. REPORTS INDICATE THAT FLOODING HAS
ENDED. 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 3834 11138 3839 11130 3829 11108 3825 11110
3826 11134
$$
MERRILLThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 5:31 PM MDT | Flash Flood Warning | SLC | Kane, Washington | 3 hr |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.