Alert archive / Utah / Flash Flood Warnings in 2012

Flash Flood Warning 23, NWS Salt Lake City, UT

July 24, 2012Wayne County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Jul 24, 2012, 1:28 PM MDT for Wayne County, Utah. It was in force for 4 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
Jul 24, 2012, 1:28 PM MDT (19:28 UTC)
Expired
Jul 24, 2012, 5:30 PM MDT
In force
4 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), 164 km from the middle of the area, began a volume at 19:31 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 12:00Z, 7.5 hours before the alert went out and 255 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.

Skew-T log-pSkew-T log-p diagram, Grand Junction, CO at 12:00Z on 2012-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Grand Junction, CO at 12:00Z on 2012-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -16 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2151 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-16 m²/s²
0-3 km storm-relative helicity
-5 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

024 
WGUS55 KSLC 241928
FFWSLC
UTC055-242330-
/O.NEW.KSLC.FF.W.0023.120724T1928Z-120724T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
128 PM MDT TUE JUL 24 2012

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CAPITOL REEF NATIONAL PARK IN CENTRAL WAYNE COUNTY IN UTAH

* UNTIL 530 PM MDT

* AT 121 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
HEAVY RAIN FROM A THUNDERSTORM OVER THE DEEP CREEK...SULPHUR CREEK 
AND SPRING CANYON AND OTHER DRY WASHES IN THE AREA.

FLASH FLOODING IS EXPECTED ALONG THE SPRING CANYON AND SULPHUR CREEK 
DRAINAGES AS WELL AS OTHER DRAINAGES IN THE AREA INCLUDING THE 
CATHEDRAL VALLEY AREA. THIS INCLUDES A SIGNIFICANT PORTION OF 
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.

&&

LAT...LON 3828 11113 3825 11131 3826 11137 3851 11143
      3852 11136 3849 11120

$$

KRUSE
2 follow-up statements
525 
WGUS75 KSLC 242143
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
343 PM MDT TUE JUL 24 2012

UTC055-242330-
/O.CON.KSLC.FF.W.0023.000000T0000Z-120724T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WAYNE UT-
343 PM MDT TUE JUL 24 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 PM MDT FOR 
PORTIONS OF CAPITOL REEF NATIONAL PARK IN CENTRAL WAYNE COUNTY...

AT 337 PM MDT...HEAVY RAINFALL HAS ENDED FOR THE TIME BEING ACROSS 
THE DEEP CREEK...SPRING CANYON AND SULPHUR CREEK DRAINAGES AS WELL 
AS THE CATHEDRAL VALLEY. FLASH FLOODING REMAINS LIKELY IN THESE 
AREAS THROUGH 530 PM MDT.

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 11113 3825 11131 3826 11137 3851 11143
      3852 11136 3849 11120

$$

KRUSE
305 
WGUS75 KSLC 242326
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
526 PM MDT TUE JUL 24 2012

UTC055-242335-
/O.EXP.KSLC.FF.W.0023.000000T0000Z-120724T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WAYNE UT-
526 PM MDT TUE JUL 24 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 530 PM MDT FOR PORTIONS OF 
CAPITOL REEF NATIONAL PARK IN CENTRAL WAYNE COUNTY...

HEAVY RAINFALL HAS ENDED ACROSS THE AREA...AND ANY EXCESSIVE RUNOFF 
HAS DIMINISHED.

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 11113 3825 11131 3826 11137 3851 11143
      3852 11136 3849 11120

$$

MPS

The office that day

Everything else NWS Salt Lake City, UT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 24, 8:58 AM MDTFlash Flood WarningSLCWashington6 hr
Jul 24, 12:56 PM MDTFlash Flood WarningSLCGarfield3 hr
Jul 24, 1:34 PM MDTSpecial Weather StatementSLCWashington41 min
Jul 24, 1:45 PM MDTSevere Thunderstorm WarningSLCWashington18 min
Jul 24, 2:44 PM MDTFlash Flood WarningSLCWashington6 hr
Jul 24, 3:18 PM MDTSpecial Weather StatementSLCIron42 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.