Alert archive / Utah / Flash Flood Warnings in 2012
Flash Flood Warning 64, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this flash flood warning at Sep 2, 2012, 4:32 PM MDT for Garfield County, 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
- Sep 2, 2012, 4:32 PM MDT (22:32 UTC)
- Expired
- Sep 2, 2012, 7:30 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), 166 km from the middle of the area, began a volume at 22:33 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 |
|---|---|---|---|
| Sep 2, 5:47 PM MDT | FLASH FLOOD | Capitol Reef Np, UT | NATIONAL PARK RANGERS REPORTED A FLASH FLOOD IN SULPHUR CREEK. |
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, 10.5 hours before the alert went out and 251 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
- 5 J/kg
- Mixed-layer CIN
- -212 J/kg
- Mixed-layer LCL
- 1557 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
727
WGUS55 KSLC 022232
FFWSLC
UTC017-055-030130-
/O.NEW.KSLC.FF.W.0064.120902T2232Z-120903T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
432 PM MDT SUN SEP 2 2012
THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTH CENTRAL GARFIELD COUNTY IN UTAH
CENTRAL WAYNE COUNTY IN UTAH
CAPITOL REEF NATIONAL PARK
* UNTIL 730 PM MDT
* AT 424 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAIN FROM A THUNDERSTORM OVER THE NORTHERN PORTIONS OF CAPITOL
REEF NATIONAL PARK. RADAR ESTIMATES OF UP TO .75 INCHES OF RAIN HAS
FALLEN OVER THE LAST 20 MINUTES ACROSS THE UPPER BASIN OF SULPHUR
CREEK...AND UP TO .50 INCHES OVER THE UPPER BASIN OF SHEETS GULCH.
THIS HEAVY RAINFALL IS EXPECTED TO CREATE FLASH FLOODING IN AND
DOWNSTREAM OF BOTH SULPHUR CREEK AND SHEETS GULCH DURING THIS
WARNING PERIOD.
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 3838 11138 3838 11109 3833 11102 3821 11106
3806 11104 3804 11121
$$
MERRILL2 follow-up statements
022
WGUS75 KSLC 022353
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
553 PM MDT SUN SEP 2 2012
UTC017-055-030130-
/O.CON.KSLC.FF.W.0064.000000T0000Z-120903T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GARFIELD UT-WAYNE UT-
553 PM MDT SUN SEP 2 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM MDT FOR
CENTRAL WAYNE AND NORTH CENTRAL GARFIELD COUNTIES...SPECIFICALLY
NORTHERN PORTIONS OF CAPITOL REEF NATIONAL PARK.
AT 548 PM MDT...CAPITOL REEF NATIONAL PARK RANGERS REPORTED A FLASH
FLOOD MOVING THROUGH SULPHUR CREEK AT THIS TIME. IF IN THIS AREA...
IT IS CRUCIAL TO MOVE TO HIGHER GROUND NOW AS THE FLOOD CONTINUES
DOWNSTREAM THROUGH THE PARK. AS RAINFALL ACCUMULATIONS OF .50 TO
1.00 INCH OF RAIN FELL OVER THIS AND ADJACENT AREAS IN A VERY SHORT
PERIOD OF TIME...OTHER DRAINAGES IN THE ADJACENT AREA WILL LIKELY
SEE RISING WATER LEVELS AS WELL.
LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO CAPITOL REEF
NATIONAL PARK
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
&&
LAT...LON 3838 11138 3838 11109 3833 11102 3821 11106
3806 11104 3804 11121
$$
MERRILL145
WGUS75 KSLC 030122
FFSSLC
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
722 PM MDT SUN SEP 2 2012
UTC017-055-030131-
/O.EXP.KSLC.FF.W.0064.000000T0000Z-120903T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GARFIELD UT-WAYNE UT-
722 PM MDT SUN SEP 2 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 730 PM MDT FOR CENTRAL
WAYNE AND NORTH CENTRAL GARFIELD COUNTIES...SPECIFICALLY FOR THE
NORTHERN PORTIONS OF 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 3838 11138 3838 11109 3833 11102 3821 11106
3806 11104 3804 11121
$$
MERRILLThe office that day
Everything else NWS Salt Lake City, UT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 6:27 PM MDT | Severe Thunderstorm Warning | SLC | Morgan, Rich, Summit, Weber | 63 min |
| Sep 1, 6:34 PM MDT | Severe Thunderstorm Warning | SLC | Tooele | 45 min |
| Sep 1, 6:56 PM MDT | Special Weather Statement | SLC | Salt Lake | 49 min |
| Sep 1, 7:07 PM MDT | Severe Thunderstorm Warning | SLC | Utah | 53 min |
| Sep 1, 7:53 PM MDT | Areal Flood Advisory | SLC | Utah | 3 hr |
| Sep 2, 4:40 PM MDT | Special Weather Statement | SLC | Garfield | 50 min |
| Sep 2, 5:28 PM MDT | Special Weather Statement | SLC | Wayne | 47 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.