Alert archive / Utah / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 115, NWS Salt Lake City, UT

September 19, 1997Emery County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Sep 19, 1997, 2:26 PM MDT for Emery County, Utah. It was in force for 34 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 19, 1997, 2:26 PM MDT (20:26 UTC)
Expired
Sep 19, 1997, 3:00 PM MDT
In force
34 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

County Emery County, UT

The radar

The Grand Junction radar (KGJX), 215 km from the middle of the area, began a volume at 20:26 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Grand Junction, CO (KGJT), launched 12:00Z, 8.4 hours before the alert went out and 191 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 1997-09-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 160 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 1997-09-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 211 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
160 J/kg
Mixed-layer CIN
-196 J/kg
Mixed-layer LCL
1567 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
211 m²/s²
0-3 km storm-relative helicity
254 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.

539 
WUUS1 KSLC 192029 RRA
SVRSLC
UTC015-192100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING FOR HIGH WINDS
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
226 PM MDT FRI SEP 19 1997

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A
SEVERE THUNDERSTORM WARNING FOR HIGH WINDS EFFECTIVE UNTIL 300 PM
MDT FOR PEOPLE IN THE FOLLOWING LOCATION...

IN CENTRAL UTAH

   ...EASTERN EMERY COUNTY
 
AT 223 PM MDT...A SEVERE THUNDERSTORM WAS INDICATED BY DOPPLER
RADAR 14 MILES NORTHWEST OF GREEN RIVER OR 10 MILES SOUTH OF
WOODSIDE MOVING NORTHEAST AT 45 MPH.

THIS STORM IS EXPECTED TO REMAIN IN RURAL AREAS BUT WILL MOVE
ACROSS HIGHWAY 6 ABOUT 230 PM.  A SIMILAR STORM PRODUCED WINDS
STRONG ENOUGH TEAR A CAMPER OFF OF A TRUCK IN THE SAME AREA EARLIER
THIS AFTERNOON.
 
THIS THUNDERSTORM MAY PRODUCE STRONG GUSTY WIND...HAIL...AND
FREQUENT LIGHTNING.  TAKE COVER WHEN THREATENING WEATHER APPROACHES.

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 19, 1:55 PM MDTSevere Thunderstorm WarningSLCEmery30 min

Nearby

Severe Thunderstorm Warnings in Utah, 1997Every severe thunderstorm 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; radar from the NEXRAD Level II archive.