Alert archive / Utah / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 114, NWS Salt Lake City, UT

September 19, 1997Emery County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Sep 19, 1997, 1:55 PM MDT for Emery County, Utah. It was in force for 30 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, 1:55 PM MDT (19:55 UTC)
Expired
Sep 19, 1997, 2:25 PM MDT
In force
30 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 19:55 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, 7.9 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.

000 
TTAA00 KSLC 191955 RRA
SVRSLC
UTC015-192025-

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

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY UT HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 225 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN CENTRAL UTAH

   ...NORTHEASTERN EMERY COUNTY
 
A SEVERE THUNDERSTORM WAS OVER NORTHEASTERN EMERY COUNTY AT 150 PM
MOVING TOWARDS THE NORTHEAST AT ABOUT 35 MPH.

THIS STORM BLEW A CAMPER OFF A TRUCK ALONG HIGHWAY 6 ABOUT 40 MILES
SOUTHEAST OF PRICE.  IT WILL AFFECT THE HIGHWAY IN THIS AREA FOR
ABOUT ANOTHER 15 TO 20 MINUTES THEN MOVE INTO REMOTE TERRAIN
OVER THE BOOK CLIFFSN.
 
THIS IS A DANGEROUS STORM.  IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN EXCESS OF 60 MPH...HAIL...AND
DEADLY LIGHTNING.

&

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 19, 2:26 PM MDTSevere Thunderstorm WarningSLCEmery34 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.