Alert archive / Wyoming / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 82, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 24, 1990, 3:36 PM MDT for Laramie County, Wyoming. It was in force for 49 min.
The area
The counties it named.
The facts
- Issued
- Jul 24, 1990, 3:36 PM MDT (21:36 UTC)
- Expired
- Jul 24, 1990, 4:25 PM MDT
- In force
- 49 min
- Issued by
- NWS Cheyenne, WY
- Area
- Whole counties
County Laramie County, WY
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Denver, CO (KDEN), launched 12:00Z, 9.6 hours before the alert went out and 202 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2660 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KCYS 242136
SVRCYS
WYC021-242245-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
336 PM MDT TUE JUL 24 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 445 PM MDT FOR PEOPLE IN THE FOLLOWING
COUNTY
IN THE SOUTHEAST PART OF WYOMING
LARAMIE COUNTY
THIS WARNING INCLUDES THE CITY OF CHEYENNE...PLUS THE TOWNS OF
PINE BLUFFS...ALBIN...AND HORSE CREEK.
AT 335 PM MDT RADAR INDICATED SEVERAL SEVERE THUNDERSTORMS. THE
STRONGEST STORM WAS LOCATED NEAR HORSE CREEK...OR ABOUT 25 MILES
NORTHWEST OF CHEYENNE. ANOTHER SEVERE STORM WAS LOCATED ABOUT 10
MILES NORTH OF CHEYENNE. STORMS WERE MOVING EAST AT 20 MILES AN
HOUR.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD.
MENTZERWhat 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 24, 1:02 PM MDT, 2 hours 34 minutes before
WYZ007-008-009-013-014-242000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 100 PM MDT TUE JUL 24 1990 RADAR AND LIGHTNING DETECTION EQUIPMENT SHOWED SCATTERED THUNDERSTORMS OVER SOUTHWEST WYOMING AT 1245 PM. MOST OF THE STORMS WERE BETWEEN EVANSTON AND KEMMERER WITH ANOTHER STRONG CELL FURTHER NORTH...JUST NORTHWEST OF PINEDALE. ALL OF THE THUNDERSTORMS WERE MOVING NORTHEAST AROUND 15 MILES AN HOUR. THUNDERSTORMS WILL CONTINUE OVER SOUTHWEST WYOMING THIS AFTERNOON AND EVENING. A FEW OF THE STORMS WILL PRODUCE BRIEF HEAVY RAIN...SMALL HAIL AND WIND GUSTS TO 50 MILES AN HOUR AS WELL AS DEADLY LIGHTNING. SCATTERED THUNDERSTORMS...A FEW POSSIBLY STRONG...WILL ALSOh BE DEVELOPING OVER SOUTHEAST WYOMING THROUGH THE EVENING. PEOPLE IN SOUTHERN WYOMING SHOULD BE ALERT TO DEVELOPING THUNDERSTORMS THIS AFTERNOON AND EVENING. SHOULD A STORM APPROACH YOUR AREA...SEEK A SAFE PLACE IMMEDIATELY. HATTEN
Special weather statement, Jul 24, 2:09 PM MDT, 1 hour 27 minutes before
WYZ007-008-009-013-014-015-016-017-242100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 205 PM MDT TUE JUL 24 1990 THUNDERSTORMS CONTINUE TO DEVELOP OVER THE WEST AND SOUTH PART OF WYOMING EARLY THIS AFTERNOON. AT 155 PM MDT THE STRONGEST STORMS IN THE SOUTH AND WEST WERE LOCATED BETWEEN EVANSTON AND AFTON...WEST OF ROCK SPRINGS AND ABOUT 20 MILES NORTHWEST OF CHEYENNE. ALL OF THE STORMS WERE MOVING TO THE EAST OR NORTHEAST AT 20 MILES AN HOUR. THE STORMS WILL PRODUCE STRONG AND GUSTY WINDS TO 50 MILES AN HOUR... HAIL...DANGEROUS LIGHTNING AND BRIEF HEAVY RAIN. THUNDERSTORMS WILL BE LIKELY OVER MUCH OF WYOMING THROUGH EARLY TONIGHT. PEOPLE IN THE STATE SHOULD BE A1LERT TO THE POSSIBILITY OF THUNDERSTORMS AND TAKE IMMEDIATE COVER AS LIGHTNING CAN BE DEADLY. WEILAND
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 2:58 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 62 min |
| Jul 24, 4:06 PM MDT | Tornado Warning | CYS | Sweetwater | 39 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 1990Every severe thunderstorm warning in 1990
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.