Alert archive / Utah / Flash Flood Warnings in 1998

Flash Flood Warning 13, NWS Salt Lake City, UT

July 25, 19984 counties in Utah

NWS Salt Lake City, UT issued this flash flood warning at Jul 25, 1998, 7:13 PM MDT for 4 counties in 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
Jul 25, 1998, 7:13 PM MDT (01:13 UTC)
Expired
Jul 25, 1998, 9:15 PM MDT
In force
2 hr
Issued by
NWS Salt Lake City, UT
Area
Whole counties

Counties Emery County, UT, Garfield County, UT, San Juan County, UT, Wayne County, UT

The nearest sounding before it

Grand Junction, CO (KGJT), launched 00:00Z, 1.2 hours before the alert went out and 218 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 00:00Z on 1998-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 120 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 00:00Z on 1998-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -32 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
120 J/kg
Mixed-layer CIN
-88 J/kg
Mixed-layer LCL
1578 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-32 m²/s²
0-3 km storm-relative helicity
-15 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 260119
FFWSLC
UTC015-017-037-055-260315-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
713 PM MDT SAT JUL 25 1998

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A

   * FLASH FLOOD WARNING FOR...
     WAYNE COUNTY IN UTAH
     NORTH CENTRAL SAN JUAN COUNTY IN UTAH
     NORTHEASTERN GARFIELD COUNTY IN UTAH
     INCLUDING CAPITOL REEF NATIONAL PARK AND
     CANYONLANDS NATIONAL PARK

   * UNTIL 915 PM MDT

   * AT 715 PM MDT WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY
     RAIN OVER CAPITOL REEF NATIONAL PARK AS WELL AS CANYONLANDS     
     NATIONAL PARKS.    

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS 
IMMANENT.  AVOID ALL WASHES AND CANYONS IN THE WARNING AREA.  DO NOT 
ATTEMPT TO DRIVE ACROSS FLOODED ROADWAYS.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 25, 9:15 PM MDTFlash Flood WarningSLCGarfield, San Juan, Wayne8 hr
Jul 25, 9:15 PM MDTFlash Flood WarningSLCEmery8 hr
Jul 25, 9:53 PM MDTFlash Flood WarningSLCEmery2 hr
Jul 26, 12:39 PM MDTFlash Flood WarningSLCSanpete, Sevier2 hr
Jul 26, 1:00 PM MDTFlash Flood WarningSLCSan Juan3 hr
Jul 26, 5:00 PM MDTFlash Flood WarningSLCKane2 hr
Jul 26, 5:18 PM MDTFlash Flood WarningSLCDavis, Morgan, Weber57 min

Nearby

Flash Flood Warnings in Utah, 1998Every flash flood warning in 1998

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.