Alert archive / Utah / Flash Flood Warnings in 1997

Flash Flood Warning 36, NWS Salt Lake City, UT

September 1, 1997Washington County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Sep 1, 1997, 5:36 PM MDT for Washington County, Utah. It was in force for 89 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
Sep 1, 1997, 5:36 PM MDT (23:36 UTC)
Expired
Sep 1, 1997, 7:05 PM MDT
In force
89 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

County Washington County, UT

The nearest sounding before it

Mercury/Desert R, NV (KDRA), launched 12:00Z, 11.6 hours before the alert went out and 234 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, Mercury/Desert R, NV at 12:00Z on 1997-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 157 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, Mercury/Desert R, NV at 12:00Z on 1997-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 square meters per square second.1939587897Sfc1 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
157 J/kg
Mixed-layer CIN
-159 J/kg
Mixed-layer LCL
2764 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
43 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 012335
FFWSLC
UTC053-020105-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
536 PM MDT MON SEP 1 1997

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 705 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN SOUTHWESTERN UTAH

   ...CENTRAL WASHINGTON COUNTY
 
AT 530 PM MDT DOPPLER RADAR WAS FOLLOWING A STRONG THUNDERSTORM
JUST NORTHEAST OF ST GEORGE WHICH WAS PRODUCING HEAVY RAINS.
THE DOPPLER RADAR ESTIMATED 2 INCHES OF RAIN FROM THIS
STORM IN THE PAST HOUR.

FLASH FLOODING IS LIKELY ALONG WASHES AND CREEKS NORTHEAST OF ST
GEORGE.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
I<MMINENT. MOVE TO HIGHER GROUND TO ESCAPE RISING WATER.


BURCH

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 1, 1:35 PM MDTFlash Flood WarningSLCGarfield2 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.