Alert archive / Utah / Flash Flood Warnings in 1992

Flash Flood Warning 8, NWS Salt Lake City, UT

May 26, 19924 counties in Utah

NWS Salt Lake City, UT issued this flash flood warning at May 26, 1992, 6:45 PM MDT for 4 counties in Utah. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: May 26, 1992, 6:45 PM MDT (00:45 UTC)
Expired: May 26, 1992, 9:00 PM MDT
In force: 2 hr
Issued by: NWS Salt Lake City, UT
Area: Whole counties

Counties Carbon County, UT, Emery County, UT, Grand County, UT, Uintah County, UT

The nearest sounding before it

Grand Junction, CO (KGJT), launched 00:00Z, 0.8 hours before the alert went out and 141 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 210 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 2007 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 32 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 
TTAA00 KSLC 270043
FFWSLC
UTC007-015-019-047-270300-

BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
645 PM MDT TUE MAY 26 1992

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A 
FLASH FLOOD WARNING EFFECTIVE UNTIL  900 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN EAST CENTRAL UTAH

   ...CARBON COUNTY...EMERY COUNTY...GRAND COUNTY

IN NORTHEAST UTAH

   ...UINTAH COUNTY

FLOODING AND FLASH FLOODING CONTINUES TO BE REPORTED IN PORTIONS OF
CENTRAL AND NORTHEAST UTAH.  STRONG THUNDERSTORMS PRODUCING HEAVY
PRECIPITATION...ESPECIALLY OVER MOUNTAINOUS TERRAIN...ALSO CONTINUE
TO BE REPORTED.  HIGHWAY 40...JUST EAST OF JENSEN IN UINTAH COUNTY...
REMAINS CLOSED FROM THUNDERSTORM RUNOFF.

IT APPEARS THAT THUNDERSTORMS ARE DIMINISHING SLOWLY FROM THE
NORTHWEST.  HOWEVER...RUNOFF FROM THUNDERSTORMS OVER HIGHER TERRAIN
WILL TAKE ANOTHER FEW HOURS TO SUBSIDE.  THEREFORE...FLASH FLOODING
WILL CONTINUE TO BE A THREAT.

DO NOT TRY TO OUTRACE A FLASH FLOOD...EITHER ON FOOT OR IN YOUR
VEHICLE.  MOVE TO HIGHER GROUND IMMEDIATELY.  BE ESPECIALLY CAUTIOUS
AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND
FLASH FLOODS.

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, May 26, 1:13 PM MDT, 5 hours 32 minutes before

UTZALL-270100-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
110 PM MDT TUE MAY 26 1992

      ...THUNDERSTORMS ON THE INCREASE OVER WESTERN UTAH...

A COLD FRONT ENTERING NORTHWEST UTAH HAS BROUGHT A RAPID DEVELOPMENT
IN THUNDERSTORMS OVER NORTHERN AND WESTERN PORTIONS OF THE STATE
EARLY THIS AFTERNOON.  STRONG THUNDERSTORMS EXTEND FROM NEAR SALT
LAKE CITY SOUTH TO DELTA UTAH.  ANOTHER AREA OF STRONG STORMS WAS
NOTED OVER THE UINTA MOUNTAINS OF NORTHEAST UTAH.

WIDESPREAD SHOWER AND THUNDERSTORM ACTIVITY IS EXPECTED OVER ALL OF
WESTERN UTAH LATER THIS AFTERNOON AS THE COLD FRONT CONTINUES
EASTWARD.  THUNDERSTORMS WILL ALSO INCREASE OVER EASTERN UTAH LATER
THIS AFTERNOON AS DAYTIME HEATING REACHES IT'S MAXIMUM.

THUNDERSTORMS WILL PRODUCE BRIEF HEAVY RAINFALL...SMALL HAIL...GUSTY
WINDS AND FREQUENT LIGHTNING.  REPORTS RECEIVED ALREADY HAVE WEST
KEARNS WITH A HALF AN INCH OF RAIN /.50/ AND PEA-SIZE HAIL.  WEST
JORDAN AND MAGNA HAVE ALSO REPORTED PEA-SIZE HAIL FROM THUNDERSTORMS.

OUTDOOR ACTIVITIES WILL BE IMPAIRED BY TODAY`S THUNDERSTORMS.  LIGHTNING
IS A PROVEN KILLER...THERFORE STAY INDOORS OF IN YOUR CAR WITH LIGHTNING
IN YOUR AREA.  ALSO...MINOR FLOODING OF ROADWAYS IN URBAN AREAS IS
POSSIBLE.  DRIVE CAUTIOUSLY IF FLOODED ROADS ARE ENCOUNTERED.

MCC...1910Z

The office that day

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

Issued	Product	Office	Counties	Lasted
May 26, 8:23 PM MDT	Flash Flood Warning	SLC	Garfield, Kane, San Juan, Wayne	4 hr
May 26, 9:40 PM MDT	Severe Thunderstorm Warning	SLC	Washington	50 min
May 27, 4:00 PM MDT	Severe Thunderstorm Warning	SLC	Kane, Washington	60 min
May 27, 4:11 PM MDT	Severe Thunderstorm Warning	SLC	Garfield, Kane, San Juan	49 min
May 27, 4:11 PM MDT	Severe Thunderstorm Warning	SLC	Washington	49 min

Nearby

Flash Flood Warnings in Utah, 1992 Every flash flood warning in 1992

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.