Alert archive / Utah / Flash Flood Warnings in 1997

Flash Flood Warning 16, NWS Salt Lake City, UT

August 4, 1997Piute County, Wayne County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Aug 4, 1997, 4:35 PM MDT for Piute County, Wayne 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
Aug 4, 1997, 4:35 PM MDT (22:35 UTC)
Expired
Aug 4, 1997, 6:35 PM MDT
In force
2 hr
Issued by
NWS Salt Lake City, UT
Area
Whole counties

Counties Piute County, UT, Wayne County, UT

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 10.6 hours before the alert went out and 274 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, Salt Lake City I, UT at 12:00Z on 1997-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 6 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, Salt Lake City I, UT at 12:00Z on 1997-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 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
6 J/kg
Mixed-layer CIN
-72 J/kg
Mixed-layer LCL
1484 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
30 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 042239
FFWSLC
UTC017-025-031-053-055-050035-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
435 PM MDT MON AUG 4 1997

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 635 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN SOUTH CENTRAL UTAH

   ...WESTERN GARFIELD COUNTY
   ...WESTERN AND SOUTHERN KANE COUNTY
   ...PIUTE COUNTY
   ...WESTERN WAYNE COUNTY

IN SOUTHWESTERN UTAH

   ...EASTERN WASHINGTON COUNTY
 
THUNDERSTORMS SPREADING ACROSS THE WARNING AREA WILL PRODUCE LOCALLY
HEAVY RAIN THAT WILL RESULT IN FLASH FLOODING OF NARROW CANYONS AND
WASHES.  DOPPLER RADAR HAS ESTIMATED RAINFALL AMOUNTS OF OVER 2
INCHES IN LESS THAN AN HOUR OVER PARTS OF THE AREA...ESPECIALLY
SOUTHEAST WASHINGTON COUNTY JUST SOUTH OF ZION PARK.  THUNDERSTORMS
ARE MOVING TO THE NORTHEAST AT 10 MPH.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 3, 8:00 PM MDTFlash Flood WarningSLCSan Juan4 hr
Aug 4, 2:24 PM MDTFlash Flood WarningSLCKane106 min
Aug 4, 4:02 PM MDTFlash Flood WarningSLCWayne58 min
Aug 4, 4:35 PM MDTFlash Flood WarningSLCGarfield, Kane, Washington2 hr

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.