Alert archive / Utah / Flash Flood Warnings in 2012
Flash Flood Warning 45, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Aug 10, 2012, 1:25 PM MDT for Wayne County, Utah. It was in force for 3 hr. 2 reports 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 10, 2012, 1:25 PM MDT (19:25 UTC)
- Expired
- Aug 10, 2012, 4:30 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), 163 km from the middle of the area, began a volume at 19:25 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 10, 1:50 PM MDT | FLASH FLOOD | Capitol Reef Np, UT | THE ROAD TO GRAND WASH IN CAPITOL REEF IS CLOSED DUE TO FLOODING. |
| Aug 10, 2:10 PM MDT | FLASH FLOOD | Capitol Reef Np, UT | THE SCENIC DRIVE IN CAPITOL REEF IS CLOSED DUE TO FLASH FLOODING. |
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, 7.4 hours before the alert went out and 254 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
- 2532 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 70 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 101925
FFWSLC
UTC055-102230-
/O.NEW.KSLC.FF.W.0045.120810T1925Z-120810T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
125 PM MDT FRI AUG 10 2012
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTH CENTRAL WAYNE COUNTY IN UTAH INCLUDING CAPITOL REEF NATIONAL
PARK
* UNTIL 430 PM MDT
* AT 120 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN FROM A THUNDERSTORM ACROSS THE SCENIC DRIVE IN CAPITOL
REEF NATIONAL PARK.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SCENIC
DRIVE IN CAPITOL REEF NATIONAL PARK...INCLUDING THE GRAND WASH AND
CAPITOL GORGE AREAS.
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 3828 11129 3831 11130 3829 11114 3828 11108
3815 11110 3815 11120
$$
MPS2 follow-up statements
427
WGUS75 KSLC 102003
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
203 PM MDT FRI AUG 10 2012
UTC055-102230-
/O.CON.KSLC.FF.W.0045.000000T0000Z-120810T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WAYNE UT-
203 PM MDT FRI AUG 10 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM MDT FOR SOUTH
CENTRAL WAYNE COUNTY...
AT 155 PM MDT...NATIONAL PARK SERVICE RANGERS IN CAPITOL REEF
REPORTED SCENIC DRIVE HAS BEEN CLOSED DUE TO FLASH FLOODING WITHIN
THE GRAND WASH AREA. THIS FLOODING WILL CONTINUE FOR ANOTHER ONE TO
TWO HOURS AS ADDITIONAL RAINFALL MOVES ACROSS THE AREA.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SCENIC DRIVE
IN CAPITOL REEF NATIONAL PARK INCLUDING THE GRAND WASH AND CAPITOL
GORGE AREAS.
THOSE PERSONS IN OR AROUND THE CAPITOL GORGE AND GRAND WASH
AREAS...AS WELL AS LOW LYING AREAS ACROSS CAPITOL REEF NATIONAL PARK
SHOULD MOVE TO HIGHER GROUND...AND STAY AWAY FROM SMALL STREAMS AND
NORMALLY DRY WASHES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 3828 11129 3831 11130 3829 11114 3828 11108
3815 11110 3815 11120
$$
MPS884
WGUS75 KSLC 102228
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
428 PM MDT FRI AUG 10 2012
UTC055-102238-
/O.EXP.KSLC.FF.W.0045.000000T0000Z-120810T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WAYNE UT-
428 PM MDT FRI AUG 10 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 430 PM MDT FOR THE SCENIC
DRIVE ALONG WITH CAPITOL GORGE AND GRAND WASHES WITHIN CAPITOL REEF
NATIONAL PARK IN SOUTH CENTRAL WAYNE COUNTY...
RUNOFF FROM EARLIER PRECIPITATION HAS DIMINISHED GREATLY AND RIVER
AND STREAM LEVELS HAVE DECREASED. ADDITIONAL RAINFALL WILL CONTINUE
TO ALLOW THE CREEK TO RUN HIGH...HOWEVER ADDITIONAL FLASH FLOODING
IS NOT ANTICIPATED. 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 3828 11129 3831 11130 3829 11114 3828 11108
3815 11110 3815 11120
$$
MPSThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 12:29 PM MDT | Flash Flood Warning | SLC | Emery | 3 hr |
| Aug 10, 12:40 PM MDT | Flash Flood Warning | SLC | Wayne | 3 hr |
| Aug 10, 4:17 PM MDT | Special Weather Statement | SLC | Emery | 43 min |
| Aug 10, 4:45 PM MDT | Special Weather Statement | SLC | Tooele | 60 min |
| Aug 10, 5:51 PM MDT | Special Weather Statement | SLC | Davis | 69 min |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.