Alert archive / Utah / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 20, NWS Salt Lake City, UT

July 18, 1995Utah County, Utah

NWS Salt Lake City, UT issued this severe thunderstorm warning at Jul 18, 1995, 6:05 PM MDT for Utah County, Utah. It was in force for 40 min.

The area

The counties it named.

The facts

Issued: Jul 18, 1995, 6:05 PM MDT (00:05 UTC)
Expired: Jul 18, 1995, 6:45 PM MDT
In force: 40 min
Issued by: NWS Salt Lake City, UT
Area: Whole counties

County Utah County, UT

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 00:00Z, 0.1 hours before the alert went out and 76 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 751 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 2250 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 60 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 
WUUS1 KSLC 190011
SVRSLC
UTC049-190045-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING FOR HIGH WINDS
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
605 PM MDT TUE JUL 18 1995

THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A 
SEVERE THUNDERSTORM WARNING FOR HIGH WINDS 
EFFECTIVE UNTIL  645 PM MDT
FOR PEOPLE IN THE FOLLOWING LOCATION...

IN CENTRAL UTAH

   ...UTAH COUNTY

AT 6 PM SPOTTERS REPORTED A WIND GUST TO 74 MPH IN PROVO.  THIS WAS
ASSOCIATED WITH A LINE OF THUNDERSTORMS MOVING NORTHEAST THROUGH UTAH
COUNTY.  THE STORM IS MOVING NORTH AT 15 MPH AND WILL AFFECT THE TOWNS
OF LEHI...PLEASANT GROVE...AND AMERICAN FORK OVER THE NEXT 15 MINUTES. 

THE HIGH WINDS ARE STRONG ENOUGH TO CAUSE PROPERTY DAMAGE. 
PRECAUTIONS SHOULD BE TAKEN TO TIE DOWN LOOSE OBJECTS.  TAKE COVER IF
YOU ARE IN THIS AREA IMMEDIATELY.

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 18, 1:10 PM MDT, 4 hours 55 minutes before

UTZALL-182200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
110 PM MDT TUE JUL 18 1995

               ...THUNDERSTORMS DEVELOPING ACROSS UTAH...

DOPPLER WEATHER RADAR...WEATHER SATELLITE PHOTOS...AND LIGHTNING
DETECTION SENSORS INDICATE THUNDERSTORMS HAVE DEVELOPED OVER THE
SOUTHERN TWO-THIRDS OF UTAH.  THE STRONGEST THUNDERSTORM WAS OCCURRING
ALONG THE UTAH/NEVADA BORDER IN JUAB COUNTY AT 1PM MDT.  THIS
THUNDERSTORM WAS PRODUCING HEAVY RAINFALL.  OTHER STORMS WERE IN EASTERN
UTAH...NEAR MOAB...AND IN THE UINTAS.

THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS MOST OF THE STATE THIS
AFTERNOON INTO THIS EVENING.  BRIEF HEAVY RAIN...GUSTY WINDS AND CLOUD-
TO-GROUND LIGHTNING CAN BE EXPECTED WITH ANY THUNDERSTORM.  PERSONS
PLANNING OUTDOOR ACTIVITIES THROUGH THIS EVENING CAN EXPECT
THUNDERSTORMS ANYWHERE IN THE STATE.  IF STORMS APPROACH YOUR
AREA...SEEK SHELTER INDOORS OR IN YOUR VEHICLE IMMEDIATELY.  IF HIKING
OR CAMPING NEAR CREEKS OR SMALL STREAMS...WATCH WATER FLOWS AND MOVE TO
HIGH GROUND IF WATER LEVELS RISE.

LEB...1910Z

Special weather statement, Jul 18, 1:11 PM MDT, 4 hours 54 minutes before

UTZALL-182200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
110 PM MDT TUE JUL 18 1995

               ...THUNDERSTORMS DEVELOPING ACROSS UTAH...

DOPPLER WEATHER RADAR...WEATHER SATELLITE PHOTOS...AND LIGHTNING
DETECTION SENSORS INDICATE THUNDERSTORMS HAVE DEVELOPED OVER THE
SOUTHERN TWO-THIRDS OF UTAH.  THE STRONGEST THUNDERSTORM WAS OCCURRING
ALONG THE UTAH/NEVADA BORDER IN JUAB COUNTY AT 1PM MDT.  THIS
THUNDERSTORM WAS PRODUCING HEAVY RAINFALL.  OTHER STORMS WERE IN EASTERN
UTAH...NEAR MOAB...AND IN THE UINTAS.

THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS MOST OF THE STATE THIS
AFTERNOON INTO THIS EVENING.  BRIEF HEAVY RAIN...GUSTY WINDS AND CLOUD-
TO-GROUND LIGHTNING CAN BE EXPECTED WITH ANY THUNDERSTORM.  PERSONS
PLANNING OUTDOOR ACTIVITIES THROUGH THIS EVENING CAN EXPECT
THUNDERSTORMS ANYWHERE IN THE STATE.  IF STORMS APPROACH YOUR
AREA...SEEK SHELTER INDOORS OR IN YOUR VEHICLE IMMEDIATELY.  IF HIK6ING
OR CAMPING NEAR CREEKS OR SMALL STREAMS...WATCH WATER FLOWS AND MOVE TO
HIGH GROUND IF WATER LEVELS RISE.

LEB...1910Z

Special weather statement, Jul 18, 4:30 PM MDT, 1 hour 35 minutes before

UTZALL-190000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
430 PM MDT TUE JUL 18 1995

           ...HEAVY RAINFALL WITH THUNDERSTORMS ACROSS UTAH...

AT 415 PM...THUNDERSTORMS CONTINUED OVER UTAH...MAINLY OVER THE EASTERN
AND NORTHERN PORTIONS OF THE STATE.  SATELLITE PICTURES AND DOPPLER
RADAR INDICATE THE HEAVIEST STORMS OVER TOOELE COUNTY NEAR I-80 AND
SOUTHERN TOOELE COUNTY SOUTHWEST OF DUGWAY PROVING GROUNDS.  STRONG
THUNDERSTORMS WERE ALSO OVER THE NORTHERN MOUNTAINS EAST OF THE WASATCH
FRONT EXTENDING NORTHWEST TOWARD MALAD CITY IDAHO.

WITH VERY WEAK WINDS ABOVE THE SURFACE OVER UTAH...THUNDERSTORM MOVEMENT
WILL BE VERY SLOW.  THE AIR MASS IS ALSO VERY MOIST AND HEAVY RAINFALL
SHOULD BE EXPECTED IN THE VICINITY OF THE THUNDERSTORMS....ESPECIALLY
OVER HIGHER TERRAIN.  SALT LAKE CITY RADAR ESTIMATES INDICATE OVER ONE
INCH OF RAINFALL CAN BE EXPECTED FROM SOME THESE STORMS.  THE UHP PORT
OF ENTRY NEAR EVANSTON WYOMING RECEIVED .86 INCHES OF RAIN IN 30 MINUTES
VERIFYING THE RADAR ESTIMATES.

MOTORISTS SHOULD PREPARE FOR SLICK ROADS ASSOCIATED WITH HEAVY RAINFALL.
STREAMS AND CREEKS CAN RISE RAPIDLY...ESPECIALLY IN MOUNTAINS AREAS.
AVOID CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS.
ESTABLISH CAMPSITES ON HIGH GROUND...BUT NOT ON TOP OF EXPOSED PEAKS OR
RIDGES WHERE LIGHTNING COULD POSE A DANGER.

DB...2230Z

Special weather statement, Jul 18, 4:33 PM MDT, 1 hour 32 minutes before

UTZALL-190000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
430 PM MDT TUE JUL 18 1995

           ...HEAVY RAINFALL WITH THUNDERSTORMS ACROSS UTAH...

AT 415 PM...THUNDERSTORMS CONTINUED OVER UTAH...MAINLY OVER THE EASTERN
AND NORTHERN PORTIONS OF THE STATE.  SATELLITE PICTURES AND DOPPLER
RADAR INDICATE THE HEAVIEST STORMS OVER TOOELE COUNTY NEAR I-80 AND
SOUTHERN TOOELE COUNTY SOUTHWEST OF DUGWAY PROVING GROUNDS.  STRONG
THUNDERSTORMS WERE ALSO OVER THE NORTHERN MOUNTAINS EAST OF THE WASATCH
FRONT EXTENDING NORTHWEST TOWARD MALAD CITY IDAHO.

WITH VERY WEAK WINDS ABOVE THE SURFACE OVER UTAH...THUNDERSTORM MOVEMENT
WILL BE VERY SLOW.  THE AIR MASS IS ALSO VERY MOIST AND HEAVY RAINFALL
SHOULD BE EXPECTED IN THE VICINITY OF THE THUNDERSTORMS....ESPECIALLY
OVER HIGHER TERRAIN.  SALT LAKE CITY RADAR ESTIMATES INDICATE OVER ONE
INCH OF RAINFALL CAN BE EXPECTED FROM SOME THESE STORMS.  THE UHP PORT
OF ENTRY NEAR EVANSTON WYOMING RECEIVED .86 INCHES OF RAIN IN 30 MINUTES
VERIFYING THE RADAR ESTIMATES.

MOTORISTS SHOULD PREPARE FOR SLICK ROADS ASSOCIATED WITH HEAVY RAINFALL.
STREAMS AND CREEKS CAN RISE RAPIDLY...ESPECIALLY IN MOUNTAINS AREAS.
AVOID CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS.
ESTABLISH CAMPSITES ON HIGH GROUND...BUT NOT ON TOP OF EXPOSED PEAKS OR
RIDGES WHERE LIGHTNING COULD POSE A DANGER.

DB...2230Z

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 4:35 PM MDT	Severe Thunderstorm Warning	SLC	Box Elder	40 min

Nearby

Severe Thunderstorm Warnings in Utah, 1995 Every 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.