Alert archive / Utah / Flash Flood Warnings in 2007

Flash Flood Warning 21, NWS Salt Lake City, UT

August 3, 2007Garfield County, Wayne County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Aug 3, 2007, 1:46 PM MDT for Garfield County, Wayne County, Utah. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 3, 2007, 1:46 PM MDT (19:46 UTC)
Expired
Aug 3, 2007, 4:45 PM MDT
In force
3 hr
Issued by
NWS Salt Lake City, UT
Area
Whole counties

Counties Garfield County, UT, Wayne County, UT

The radar

The Cedar City radar (KICX), 158 km from the middle of the area, began a volume at 19:48 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, 7.8 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.

Skew-T log-pSkew-T log-p diagram, Grand Junction, CO at 12:00Z on 2007-08-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Grand Junction, CO at 12:00Z on 2007-08-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 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
1727 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
35 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.

000 
WGUS55 KSLC 031948
FFWSLC
UTC017-055-032245-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
146 PM MDT FRI AUG 3 2007

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...

* UNTIL 445 PM MDT

* AT 142 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
INTENSE RAINFALL OVER THE HEADWATER AREAS OF CAPITOL GORGE OF 
CAPITOL REEF NATIONAL PARK.

THE INTENSE RAINFALL IS EXPECTED TO CREATE FLASH FLOODING IN THE 
CAPITOL GORGE WASH.  THIS WASH IS A POPULAR HIKE IN CAPITOL REEF.

IF YOU PLAN ON HIKING OR DRIVING IN THIS AREA...PLEASE USE CAUTION 
TO ENSURE YOUR SAFETY.

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 3806 11125 3826 11106 3830 11107 3831 11140

$$

MCINERNEY
1 follow-up statement
000 
WGUS75 KSLC 032212
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
404 PM MDT FRI AUG 3 2007

UTC017-055-032245-
GARFIELD UT-WAYNE UT-
404 PM MDT FRI AUG 3 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 445 PM MDT FOR
CENTRAL WAYNE AND NORTH CENTRAL GARFIELD COUNTIES...

AT 400 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORM ACTIVITY MOVING THROUGH CAPITOL REEF NATIONAL 
PARK.  THE CAPITOL GORGE ROAD HAS BEEN CLOSED DUE TO MINOR FLASH 
FLOODING.

CONTINUED THUNDERSTORM ACTIVITY IS FORMING ALL THROUGH THE WARNING 
AREA AS HEATING OF THE AFTERNOON HOURS INCREASES. PERSONS HIKING OR 
DRIVING IN CAPITOL REEF NATIONAL PARK AND AREAS TO THE EAST ARE 
ADVISED TO USE CAUTION.

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 3806 11125 3826 11106 3830 11107 3831 11140

$$

MCINERNEY

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 2, 6:24 PM MDTSevere Thunderstorm WarningSLCWayne51 min
Aug 3, 3:45 PM MDTFlash Flood WatchSLC8 hr
Aug 3, 4:33 PM MDTFlash Flood WarningSLCGarfield4 hr
Aug 3, 5:09 PM MDTFlash Flood WarningSLCGarfield, Kane6 hr
Aug 3, 5:42 PM MDTFlash Flood WarningSLCGarfield, Kane6 hr

Nearby

Flash Flood Warnings in Utah, 2007Every flash flood warning in 2007

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.