Alert archive / Wyoming / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 80, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jul 23, 1990, 5:01 PM MDT for Laramie County, Wyoming. It was in force for 49 min.
The area
The counties it named.
The facts
- Issued
- Jul 23, 1990, 5:01 PM MDT (23:01 UTC)
- Expired
- Jul 23, 1990, 5:50 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, 11.0 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
- 89 J/kg
- Mixed-layer CIN
- -239 J/kg
- Mixed-layer LCL
- 1396 m above ground
- 0-6 km bulk shear
- 0 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 0 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 232301
SVRCYS
WYC021-240000-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
501 PM MDT MON JUL 23 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 600 PM MDT FOR PEOPLE IN THE FOLLOWING
COUNTY
IN THE SOUTHEAST PART OF WYOMING
LARAMIE COUNTY
THIS INCLUDES THE CITY OF CHEYENNE.
AT 458 PM MDT 2 INCH DIAMETER HAIL WAS REPORTED ABOUT 2 MILES NORTH
OF CHEYENNE. THE STORM PRODUCING THIS HAIL WAS 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 23, 3:25 PM MDT, 1 hour 36 minutes before
WYZ013-232330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 325 PM MDT MON JUL 23 1990 ...WIND GUSTS TO 50 MPH REPORTED WEST OF THE WYOMING BORDER NEAR COKEVILLE IN THE SOUTHWEST CORNER OF WYOMING... AT 315 PM MDT OBSERVERS NEAR SODA SPRINGS IDAHO REPORTED WIND GUSTS NEAR 50 MILES AN HOUR IN A THUNDERSTORM. SODA SPRINGS IS ABOUT 30 MILES WEST OF COKEVILLE. THE THUNDERSTORM PRODUCING THESE WINDS IS MOVING EAST AT 15 MILES AN HOUR AND WILL REACH THE COKEVILLE AREA AROUND 345 PM MDT. EVEN STRONGER WINDS ARE VERY POSSIBLE WITH THIS STORM ALONG HAIL... HEAVY RAIN AND DANGEROUS LIGHTNING. PEOPLE SHOULD KEEP AN EYE ON THE SKY AND BE READY TO QUICKLY SEEK SHELTER AS THE STORM APPROACHES. MOVE TO INTERIOR ROOMS IN THE EVENT THAT THE WINDOWS ARE DAMAGED BY A WIND-DRIVEN OBJECT. CAS
Special weather statement, Jul 23, 3:54 PM MDT, 1 hour 7 minutes before
WYZ017-232330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 355 PM MDT MON JUL 23 1990 ...STRONG THUNDERSTORMS HAVE DEVELOPED OVER SOUTHEAST WYOMING... SINCE 200 PM MDT THUNDERSTORMS HAVE DEVELOPED OVER THE EXTREME SOUTHEAST PART OF WYOMING. BY 345 PM MDT NATIONAL WEATHER SERVICE RADAR INDICATED STRONG THUNDERSTORMS ABOUT 6 MILES EAST OF CHEYENNE... 15 MILES NORTH OF CHEYENNE AND 20 MILES SOUTH OF LARAMIE...NEAR TIE SIDING. AT 330 PM MDT THE CHEYENNE AIRPORT RECIEVED ONE QUARTER INCH DIAMETER HAIL FOR A FIVE MINUTE PERIOD. HAIL...GUSTY WINDS TO 40 MILES AN HOUR DANGEROUS LIGHTNING AND BRIEF HEAVY RAIN WILL ACCOMPANY THE STORMS THROUGH THE EVENING. THE STORMS WERE MOVING TO THE SOUTHEAST AT 20 MILES AN HOUR. THE THUNDERSTORMS WILL CONTINUE IN THE SOUTHEAST TIL AROUND MIDNIGHT. PEOPLE IN THE SOUTHEAST CORNER OF WYOMING...INCLUDING THE CITY OF CHEYENNE SHOULD BE AWARE OF THE THUNDERSTORMS. TAKE IMMEDIATE CO"VER WHEN A STORM APPROACHES...AS LIGHTNING CAN BE DEADLY. WEILAND
Special weather statement, Jul 23, 4:53 PM MDT, 8 minutes before
WYZ017-240000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 450 PM MDT MON JUL 23 1990 ...STRONG THUNDERSTORMS CONTINUE OVER SOUTHEAST WYOMING... STRONG THUNDERSTORMS CONTINUE OVER THE SOUTHEAST CORNER OF WYOMING LATE MONDAY AFTERNOON. AT 445 PM MDT MARBLE SIZED DIAMETER HAIL WAS REPORTED AT WARREN AFB ON THE WEST SIDE OF CHEYENNE. AT THAT TIME...STRONG THUNDERSTORMS WERE LOCATED OVER CHEYENNE... 10 MILES WEST OF CHEYENNE AND 10 MILES SOUTHEAST OF CHEYENNE. ALL OF THE STORMS WERE MOVING TO THE SOUTHEAST AT EAST AT 20 MILES AN HOUR. FOR THE REST OF THE EVENING THUNDERSTORMS...SOME OF THEM STRONG... WILL OCCUR ROVER SOUTHEAST WYOMING. THESE STORMS WILL PRODUCE HAIL... WIND GUSTS TO 45 MILES AN HOUR...DANGEROUS LIGHTNING AND BRIEF HEAVY RAIN. < PEOPLE IN THE SOUTHEAST CORNER OF WYOMING...INCLUDING THE CITY OF CHEYENNE SHOULD BE AWARE OF THE THUNDERSTORMS. TAKE IMMEDIATE COVER WHEN A STORM APPROACHES...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 22, 6:15 PM MDT | Severe Thunderstorm Warning | CYS | Laramie | 45 min |
| Jul 23, 3:33 PM MDT | Severe Thunderstorm Warning | CYS | Lincoln | 57 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.