Alert archive / Utah / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 23, NWS Salt Lake City, UT

July 20, 1995Emery County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 20, 1995, 7:15 PM MDT for Emery County, Utah. It was in force for 45 min.

The area

The counties it named.

The facts

Issued
Jul 20, 1995, 7:15 PM MDT (01:15 UTC)
Expired
Jul 20, 1995, 8:00 PM MDT
In force
45 min
Issued by
NWS Salt Lake City, UT
Area
Whole counties

County Emery County, UT

The nearest sounding before it

Grand Junction, CO (KGJT), launched 00:00Z, 1.3 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 00:00Z on 1995-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 449 joules per kilogram.LCLEL10008507005003002001001 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 1995-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 square meters per square second.193958Sfc1 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
449 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
2907 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
68 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSLC 210122 RRA
SVRSLC
UTC015-210200-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
715 PM MDT THU JUL 20 1995

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A 
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  800 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN EAST CENTRAL UTAH

   ...CENTRAL EMERY COUNTY

AT 715 PM RADAR SHOWED A SEVERE THUNDERSTORM OVER THE REMOTE AREA OF
EMERY COUNTY IN THE VICINITY OF THE NORTHERN SAN RAFAEL SWELL AND CEDAR
MOUNTAIN. 

THIS THUNDERSTORM IS LIKELY PRODUCING HEAVY RAINS...LARGE HAIL...AND
DAMAGING GUSTY WINDS..ALONG WITH DEADLY LIGHTNING.  HEAVY RAINS FLOOD
ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

What forecasters said that day

The local office's own words before this severe thunderstorm 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, Jul 20, 4:45 PM MDT, 2 hours 30 minutes before
UTZ001>005-010-210200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
445 PM MDT WED JUL 20 1995

...LOCALLY HEAVY RAINS OVER NORTHERN UTAH...

THUNDERSTORMS HAVE FORMED OVER PARTS OF NORTHERN UTAH WHICH ARE
PRODUCING LOCALLY HEAVY RAINS.  ONE LARGE STORM IS IN NORTHWESTERN
BOX ELDER COUNTY...WHERE REPORTS OF 0.60 INCHES OF RAIN FELL IN TEN
MINUTES IN PARK VALLEY.  ANOTHER STORM IS LOCATED OVER THE SOUTHERN
ASPECT OF THE CENTRAL UNITA MOUNTAINS.  NATIONAL WEATHER SERVICE
DOPPLER RADAR INDICATES THESE STORMS ARE PRODUCING BRIEF HEAVY RAINS
WITH THE POSSIBILITY OF RAPID RISES ON STREAMS CREEKS AND DRY WASHES.

MORE SCATTERED THUNDERSTORMS...WITH BRIEF HEAVY RAIN...ARE EXPECTED
OVER NORTHERN UTAH THIS EVENING UNTIL SUNSET.

PJW/LEB...2245Z
Special weather statement, Jul 20, 4:49 PM MDT, 2 hours 26 minutes before
UTZ001>005-010-210200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
445 PM MDT WED JUL 20 1995

...LOCALLY HEAVY RAINS OVER NORTHERN UTAH...

THUNDERSTORMS HAVE FORMED OVER PARTS OF NORTHERN UTAH WHICH ARE
PRODUCING LOCALLY HEAVY RAINS.  ONE LARGE STORM IS IN NORTHWESTERN
BOX ELDER COUNTY...WHERE REPORTS OF 0.60 INCHES OF RAIN FELL IN TEN
MINUTES IN PARK VALLEY.  ANOTHER STORM IS LOCATED OVER THE SOUTHERN
ASPECT OF THE CENTRAL UNITA MOUNTAINS.  NATIONAL WEATHER SERVICE
DOPPLER RADAR INDICATES THESE STORMS ARE PRODUCING BRIEF HEAVY RAINS
WITH THE POSSIBILITY OF RAPID RISES ON STREAMS CREEKS AND DRY WASHES.

MORE SCATTERED THUNDERSTORMS...WITH BRIEF HEAVY RAIN...ARE EXPECTED
OVER NORTHERN UTAH THIS EVENING UNTIL SUNSET.

PJW/LEB...2245Z

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 2:44 PM MDTSevere Thunderstorm WarningSLCDuchesne, Uintah66 min

Nearby

Severe Thunderstorm Warnings in Utah, 1995Every severe thunderstorm warning in 1995

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.