Alert archive / Utah / Severe Thunderstorm Warnings in 1995
Severe Thunderstorm Warning 9, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this severe thunderstorm warning at May 21, 1995, 5:35 PM MDT for Box Elder County, Utah. It was in force for 40 min.
The area
The counties it named.
The facts
- Issued
- May 21, 1995, 5:35 PM MDT (23:35 UTC)
- Expired
- May 21, 1995, 6:15 PM MDT
- In force
- 40 min
- Issued by
- NWS Salt Lake City, UT
- Area
- Whole counties
County Box Elder County, UT
The nearest sounding before it
Salt Lake City I, UT (KSLC), launched 12:00Z, 11.6 hours before the alert went out and 129 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.
- Mixed-layer CAPE
- 385 J/kg
- Mixed-layer CIN
- -127 J/kg
- Mixed-layer LCL
- 1638 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 124 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSLC 212341 SVRSLC UTC003-220015- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SALT LAKE CITY UT 535 PM MDT SUN MAY 21 1995 THE NATIONAL WEATHER SERVICE IN SALT LAKE CITY HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 615 PM MDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHWEST UTAH ...EASTERN BOX ELDER COUNTY RADAR IS SHOWING A STRONG THUNDERSTORM ABOUT 10 MILES NORTHWEST OF BRIGHAM CITY. THIS STORM IS LIKELY PRODUCING LARGE HAIL AND STRONG WINDS. THE STORM IS MOVING EAST-NORTHEAST AT 10-15 MPH AND WILL BE AFFECTING THE TOWNS OF BEAR RIVER CITY AND HONEYVILLE WITHIN THE NEXT 30 MINUTES. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
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, May 21, 2:02 PM MDT, 3 hours 33 minutes before
UTZALL-220000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 200 PM MDT SAT MAY 20 1995 ...AFTERNOON THUNDERSTORMS DEVELOPING ACROSS UTAH... THUNDERSTORMS HAVE BEGUN TO DEVELOP ACROSS UTAH IN THE HEAT OF THE AFTERNOON. THE STRONGEST THUNDERSTORM AT 2 PM WAS OVER GRANTSVILLE IN TOOELE COUNTY AND MOVING TO THE EAST NORTHEAST AT ABOUT 15 MPH. A COUPLE MORE STRONG THUNDERSTORMS WERE IN NORTHERN BOX ELDER COUNTY JUST SOUTH OF PARK VALLEY. THESE THUNDERSTORMS WERE MOVING IN THE SAME GENERAL DIRECTION. ALSO...LIGHTNING DETECTION EQUIPMENT WAS SHOWING THUNDERSTORMS NEAR DUCHESNE AND JUST NORTH OF I-70 IN EASTERN UINTA COUNTY. THE AIRMASS OVER UTAH IS VERY UNSTABLE TODAY AND SOME THUNDERSTORMS MAY BE ACCOMPANIED BY STRONG WINDS AND SMALL HAIL. THOSE WHO WILL BE OUTDOORS THIS AFTERNOON AND EVENING NEED TO KEEP AN EYE ON THE WEATHER AND MOVE TO SHELTER WHEN THUNDERSTORMS APPROACH. SMITH...2002Z
Special weather statement, May 21, 3:29 PM MDT, 2 hours 6 minutes before
UTZALL-220000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 330 PM MDT SUN MAY 21 1995 ...AFTERNOON THUNDERSTORMS CONTINUING ACROSS UTAH... THUNDERSTORMS CONTINUE ACROSS UTAH THIS AFTERNOON. MOST OF THE THUNDERSTORM ACTIVITY IS IN EXTREME NORTHERN UTAH AND THERE ARE ALSO THUNDERSTORMS IN THE NORTHEAST UTAH DUCHESNE AND UINTAH COUNTIES. AT 330 PM THE STRONGEST THUNDERSTORMS WERE ON A LINE FROM WENDOVER IN WESTERN TOOELE COUNTY UP TO NEAR PORTAGE IN NORTHERN BOX ELDER COUNTY. THE GENERAL THUNDERSTORM MOVEMENT WAS TO THE NORTHEAST AT 15 MPH. THESE THUNDERSTORMS IN EXTREME NORTHERN UTAH WILL BE AFFECTING TRAVELERS ON I-80 NEAR WENDOVER...ON I-84 FROM SNOWVILLE SOUTHEAST TO TREMONTON AND ALSO TRAVELERS ON I-15 NEAR THE IDAHO BORDER. SOME OF THESE THUNDERSTORMS MAY BE ACCOMPANIED BY STRONG WINDS AND HAIL. THOSE WHO WILL BE OUTDOORS THIS AFTERNOON AND EVENING NEED TO KEEP AN EYE ON THE WEATHER AND MOVE TO S"HELTER WHEN THUNDERSTORMS APPROACH. SMITH...2130Z
Special weather statement, May 21, 5:04 PM MDT, 31 minutes before
UTZALL-220200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SALT LAKE CITY UT 505 PM MDT SUN MAY 21 1995 ...THUNDERSTORMS OVER NORTHERN UTAH... THUNDERSTORMS CONTINUE TO RUMBLE OVER NORTHERN UTAH THIS AFTERNOON. RADAR AND SATELLITE SHOW THE MAIN ACTIVITY OVER THE NORTHWEST AND ANOTHER AREA MOVING THROUGH THE EASTERN UINTA BASIN. AT 500 PM THE STRONGEST THUNDERSTORMS WERE OVER NORTHWEST UTAH FROM ABOUT DAVIS COUNTY WESTWARD TO THE NEVADA BORDER AND MAINLY NORTH OF I-80. THE GENERAL MOVEMENT OF THE STORMS WAS TO THE EAST-NORTHEAST AT ABOUT 15-20 MPH. THESE THUNDERSTORMS WILL BE AFFECTING PORTIONS OF THE WASATCH FRONT FROM ABOUT SALT LAKE COUNTY NORTHWARD THROUGH THIS EVENING. ALSO AFFECTED WILL BE TRAVELERS ON I-80 NEAR WENDOVER...ON UTAH PORTIONS OF I-84 FROM THE IDAHO BORDER SOUTHEAST TO TREMONTON AND ON I-15 ALONG THE WASATCH FRONT. BRIEF HEAVY RAINS AND DEADLY LIGHTNING WILL ACCOMPANY THESE THUNDERSTORMS...SOME ~MAY ALSO CONTAIN STRONG WINDS AND HAIL. THOSE WHO WILL BE OUTDOORS THIS AFTERNOON AND EVENING NEED TO KEEP AN EYE ON THE WEATHER AND MOVE TO SHELTER WHEN THUNDERSTORMS APPROACH. PJW...2303Z
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.