Alert archive / Utah / Flash Flood Warnings in 1997

Flash Flood Warning 40, NWS Salt Lake City, UT

September 5, 1997Garfield County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Sep 5, 1997, 5:43 PM MDT for Garfield County, Utah. It was in force for 2 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
Sep 5, 1997, 5:43 PM MDT (23:43 UTC)
Expired
Sep 5, 1997, 7:45 PM MDT
In force
2 hr
Issued by
NWS Salt Lake City, UT
Area
Whole counties

County Garfield County, UT

The nearest sounding before it

Grand Junction, CO (KGJT), launched 12:00Z, 11.7 hours before the alert went out and 293 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 1997-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 79 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 1997-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 99 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
79 J/kg
Mixed-layer CIN
-182 J/kg
Mixed-layer LCL
1243 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
99 m²/s²
0-3 km storm-relative helicity
151 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 052347
FFWSLC
UTC017-060145-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD/SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
543 PM MDT FRI SEP 5 1997

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A
FLASH FLOOD/SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 745 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTH CENTRAL UTAH

   ...SOUTHEASTERN GARFIELD COUNTY
 
AT 539 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
RADAR 30 MILES NORTHWEST OF BULLFROG OR 17 MILES SOUTHEAST OF
BOULDER MOVING EAST AT 15 MPH.  IT WILL REMAIN IN THE VICINITY OF
THE ESCALANTE RIVER AND ITS TRIBUTARIES SOUTHEAST OF BOUDER.

THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS
 
THIS THUNDERSTORM MAY PRODUCE STRONG GUSTY WIND...LARGE HAIL...AND
FREQUENT LIGHTNING.  TAKE COVER WHEN THREATENING WEATHER APPROACHES.

IF FLASH FLOODING IS OBSERVED...ACT QUICKLY.  MOVE TO ESCAPE FLOOD
WATERS.  DO NOT STAY IN AREAS SUBJECT TO LFLOODING WHEN WATER BEGINS
RISING.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 4, 8:15 PM MDTSevere Thunderstorm WarningSLCTooele45 min
Sep 4, 9:07 PM MDTSevere Thunderstorm WarningSLCKane48 min
Sep 5, 3:44 PM MDTSevere Thunderstorm WarningSLCGarfield, Piute46 min

Nearby

Flash Flood Warnings in Utah, 1997Every flash flood warning in 1997

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.