Alert archive / Utah / Flash Flood Warnings in 2012
Flash Flood Warning 26, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Jul 28, 2012, 5:49 PM MDT for Wayne County, Utah. It was in force for 6 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
- Jul 28, 2012, 5:49 PM MDT (23:49 UTC)
- Expired
- Jul 28, 2012, 11:45 PM MDT
- In force
- 6 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), 158 km from the middle of the area, began a volume at 23:51 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 |
|---|---|---|---|
| Jul 28, 7:30 PM MDT | FLASH FLOOD | 10 Ne Torrey, UT | FLASH FLOOD REPORTED IN CATHEDRAL VALLEY, THE NORTHERN PORTION OF CAPITOL REEF NATIONAL PARK. ROADS IN THE AREA WERE WASHED OUT, STRANDING VISITORS. PARK RANGERS REPORTED THAT THE CATHEDRAL VALLEY ROAD HAD A 2 1/2 FOOT DEEP TRENCH CREATED BY THE WATER. |
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, 11.8 hours before the alert went out and 260 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
- 19 J/kg
- Mixed-layer CIN
- -281 J/kg
- Mixed-layer LCL
- 1377 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
032
WGUS55 KSLC 282349
FFWSLC
UTC055-290545-
/O.NEW.KSLC.FF.W.0026.120728T2349Z-120729T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
549 PM MDT SAT JUL 28 2012
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
WESTERN WAYNE COUNTY IN UTAH
* UNTIL 1145 PM MDT
* AT 541 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN FROM A THUNDERSTORM OVER THE WARNED AREA.
THIS EXPANDS THE EARLIER WARNING FOR CAPITOL REEF NATIONAL PARK TO
INCLUDE THE SULPHUR CREEK DRAINAGE THROUGH THE PARK. HEAVY RAIN
FALLING EARLIER IN THE UPPER PORTIONS OF THE SULPHUR CREEK DRAINAGE
NORTH OF TORREY HAVE GENERATED FLASH FLOODING REPORTED BY PARK
RANGERS. THIS FLOODING WILL MOVE THROUGH THE PARK LATER THIS
EVENING.
FLASH FLOODING IS STILL EXPECTED ALONG THE POLK CREEK DRAINAGE IN
THE CATHEDRAL VALLEY PORTION OF THE PARK...THAT HAS THE POTENTIAL TO
WASH OUT DIRT ROADS IN THAT AREA.
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 3830 11147 3837 11153 3850 11152 3849 11103
3819 11102 3820 11117 3823 11133
$$
PW2 follow-up statements
998
WGUS75 KSLC 290204
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
804 PM MDT SAT JUL 28 2012
UTC055-290545-
/O.CON.KSLC.FF.W.0026.000000T0000Z-120729T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WAYNE UT-
804 PM MDT SAT JUL 28 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 PM MDT FOR
WESTERN WAYNE COUNTY INCLUDING CAPITOL REEF NATIONAL PARK...
AT 748 PM MDT...HEAVY RAINFALL HAD ENDED OVER CAPITOL REEF NATIONAL
PARK. IT IS LIKELY THAT FLOOD WATERS FROM THE EARLIER RAIN CONTINUE
TO FLOW THROUGH THE DRAINAGES THAT CROSS THE NORTHERN PORTIONS OF
THE PARK. THESE INCLUDE BUT ARE NOT LIMITED TO SULPHUR CREEK...
SPRING CANYON...POLK CREEK AND DEEP CREEK.
DIRT ROADS IN THE CATHEDRAL VALLEY PORTION OF THE PARK INCLUDING
HARTNET ROAD WILL BE MUDDY TONIGHT AND COULD BE LOCALLY WASHED OUT
OR IMPASSABLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
&&
LAT...LON 3830 11147 3837 11153 3850 11152 3849 11103
3819 11102 3820 11117 3823 11133
$$
PW957
WGUS75 KSLC 290537
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1137 PM MDT SAT JUL 28 2012
UTC055-290547-
/O.EXP.KSLC.FF.W.0026.000000T0000Z-120729T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WAYNE UT-
1137 PM MDT SAT JUL 28 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 1145 PM MDT FOR WESTERN
WAYNE 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.
LAT...LON 3830 11147 3837 11153 3850 11152 3849 11103
3819 11102 3820 11117 3823 11133
$$
ROGOWSKIThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 5:26 PM MDT | Flash Flood Warning | SLC | Wayne | 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.