Alert archive / Utah / Flash Flood Warnings in 1994

Flash Flood Warning 10, NWS Salt Lake City, UT

August 11, 1994Sevier County, Utah

NWS Salt Lake City, UT issued this flash flood warning at Aug 11, 1994, 6:00 PM MDT for Sevier County, Utah. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Aug 11, 1994, 6:00 PM MDT (00:00 UTC)
Expired
Aug 11, 1994, 8:00 PM MDT
In force
2 hr
Issued by
NWS Salt Lake City, UT
Area
Whole counties

County Sevier County, UT

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 00:00Z, 0.0 hours before the alert went out and 226 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 00:00Z on 1994-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 35 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 00:00Z on 1994-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.19395878Sfc1 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
35 J/kg
Mixed-layer CIN
-162 J/kg
Mixed-layer LCL
2790 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
78 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, Aug 11, 5:38 PM MDT, 22 minutes before
UTZ001>003-010-110300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
538 PM MDT THU AUG 11 1994

...A BAND OF THUNDERSTORMS ARE MOVING INTO NORTHWESTERN UTAH...

THUNDERSTORMS IN NORTHEASTERN NEVADA ARE MOVING INTO NORTHWESTERN UTAH.
THESE THUNDERSTORMS HAVE PRODUCED SMALL HAIL AND MODERATE RAIN AT OASIS
NEVADA /25 MILES EAST OF WELLS/.

THE THUNDERSTORMS MAY PRODUCE LOCALLY HEAVY SHOWERS...WINDS...AND SMALL
HAIL.

LOOSE ITEMS THAT COULD BE BLOWN AWAY OR DAMAGED BY STRONG WINDS
SHOULD BE SECURED.

OMAI...2338Z

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 11, 6:00 PM MDTFlash Flood WarningSLCGarfield, Wayne2 hr
Aug 11, 9:43 PM MDTSevere Thunderstorm WarningSLCJuab, Millard62 min

Nearby

Flash Flood Warnings in Utah, 1994Every flash flood warning in 1994

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.