Alert archive / Utah / Flash Flood Warnings in 1996

Flash Flood Warning 3, NWS Salt Lake City, UT

July 7, 1996Garfield County, Wayne County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Jul 7, 1996, 1:11 PM MDT for Garfield County, Wayne County, Utah. It was in force for 109 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 7, 1996, 1:11 PM MDT (19:11 UTC)
Expired
Jul 7, 1996, 3:00 PM MDT
In force
109 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

Counties Garfield County, UT, Wayne County, UT

The nearest sounding before it

Grand Junction, CO (KGJT), launched 12:00Z, 7.2 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 1996-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 34 joules per kilogram.LCLLFCEL10008507005003002001001 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 1996-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 24 square meters per square second.193958Sfc1 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
34 J/kg
Mixed-layer CIN
-394 J/kg
Mixed-layer LCL
3112 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
24 m²/s²
0-3 km storm-relative helicity
40 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSLC 071917
FFWSLC
UTC017-055-072100-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
111 PM MDT SUN JUL 7 1996

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A 
FLASH FLOOD WARNING EFFECTIVE UNTIL  300 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN SOUTH CENTRAL UTAH

   ...CENTRAL GARFIELD COUNTY...SOUTH CENTRAL WAYNE COUNTY


DOPPLER RADAR INDICATES TWO VERY STRONG THUNDERSTORMS ONE NEAR
ESCALANTE AND THE OTHER NEAR GROVER.  THESE STORMS ARE MOVING SLOWLY
NORTHEAST.  HEAVY RAIN FROM THESE STORMS IS EXPECTED TO CAUSE FLASH
FLOODING IN THE NORMALLY DRY WASHES AROUND ESCALANTE AND ALSO IN
CAPITOL REEF NATIONAL PARK. 

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE
ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...
ON F~OOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jul 7, 1:01 PM MDT, 10 minutes before
UTZ005>013-080000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
100 PM MDT SUN JUL 7 1996

...A FEW STRONG THUNDERSTORMS OVER SOUTHERN UTAH...

DOPPLER RADAR AND SATELLITE INDICATE A FEW STRONG THUNDERSTORMS HAVE
FORMED OVER SOUTH-CENTRAL UTAH...BETWEEN BRYCE CANYON AND CAPITOL
REEF NATIONAL PARKS.  THESE STORMS WILL HAVE FREQUENT LIGHTNING
ASSOCIATED WITH THEM AND MAY ALSO PRODUCE LOCALLY HEAVY
RAIN...HAIL...AND STRONG GUSTY WINDS.

THE STORMS ARE GENERALLY MOVING NORTHEAST AT 10-15 MPH.
HOWEVER...ONE STORM WEST OF ESCALANTE CONTINUES TO REDEVELOP
RESULTING IN SLOWER MOVEMENT.

SOME FLOODING OF SMALL STREAMS OR NORMALLY DRY WASHES IS POSSIBLE
FROM THESE STORMS.

THUNDERSTORM ACTIVITY OVER THE REMAINDER OF SOUTHERN UTAH IS EXPECTED
TO INCREASE THROUGH LATE AFTERNOON.  HIKERS OR OTHER OUTDOOR
RECREATIONISTS SHOULD BE ALERT TO THE HAZARDS ASSOCIATED WITH
THUNDERSTORMS...ESPECIALLY LIGHTNING AND FLOONDING...AND SEEK SHELTER
IN A SAFE AREA IF THUNDERSTORMS ARE IN THE AREA.

DRS...1900Z

Nearby

Flash Flood Warnings in Utah, 1996Every flash flood warning in 1996

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.