Alert archive / Wyoming / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 96, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 4, 1990, 3:24 PM MDT for Laramie County, Wyoming. It was in force for 41 min.
The area
The counties it named.
The facts
- Issued
- Aug 4, 1990, 3:24 PM MDT (21:24 UTC)
- Expired
- Aug 4, 1990, 4:05 PM MDT
- In force
- 41 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, 9.4 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
- 2025 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -24 m²/s²
- 0-3 km storm-relative helicity
- 92 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 042126
SVRCYS
WYC021-042230-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
324 PM MDT SAT AUG 4 1990
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 430 PM MDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN SOUTHEAST WYOMING
...SOUTHERN LARAMIE
AT 325 PM MDT RADAR INDICATED A SEVERE THUNDERSTORM 17 MILES WEST
OF CHEYENNE. MOVEMENT OF THE THUNDERSTORM WAS EAST AT 15 MILES
AN HOUR. THIS WARNING DOES INCLUDE THE CITY OF CHEYENNE.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
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
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD
PREPARE FOR DAMAGING WIND IN0 EXCESS OF 55 MPH...LARGE HAIL...AND
DEADLY LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.
EKBWhat 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, Aug 4, 9:34 AM MDT, 5 hours 50 minutes before
WYZALL-041800- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 935 AM MDT SAT AUG 4 1990 ...STRONG THUNDERSTORMS ARE EXPECTED IN EASTERN WYOMING THIS AFTERNOON... THUNDERSTORMS ARE EXPECTED TO DEVELOP AGAIN THIS AFTERNOON ACROSS MUCH OF WYOMING. THE STRONGEST WILL BE IN THE EASTERN PART OF THE STATE. STRONG GUSTY WINDS...HAIL...AND LOCALLY BRIEF HEAVY RAIN ARE POSSIBLE THERE. DANGEROUS LIGHTNING CAN ALSO OCCUR. PERSONSX PLANNING OUTDOOR ACTIVITIES THIS AFTERNOON...ESPECIALLY IN EASTERN WYOMING...SHOULD BE AWARE OF POSSIBLE ADVERSE WEATHER CONDITIONS. CGB
Special weather statement, Aug 4, 9:37 AM MDT, 5 hours 47 minutes before
NEZ005-041630- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE SCOTTSBLUFF NE 937 AM MDT FRI AUG 4 1990 ...A STRONG THUNDERSTORM IN THE CENTRAL NEBRASKA PANHANDLE... AT 935 AM MDT SHOWERS AND THUNDERSTORMS EXTENDED FROM 30 MILES WEST OF CHADRON NEBRASKA TO 5 MILES NORTHWEST OF SCOTTSBLUFF TO ALLIANCE NEBRASKA. THE STRONGEST STORM WAS LOCATED 7 MILES NORTHWEST OF SCOTTSBLUFF NEBRASKA IN NORTHERN SCOTTS BLUFF COUNTY. ALL OF THE SHOWERS AND THUNDERSTORMS WERE MOVING TO THE SOUTHEAST AT 15 MILES PER HOUR. BRIEF HEAVY RAIN...GUSTY WIND...DANGEROUS LIGHTNING CAN BE EXPECTD WITH WITH THE THUNDERSTORMS AS THEY MOVE ACROSS THE NORTH AND CENTRAL NEBRASKA PANHANDLE UNTIL 1030 AM MDT. PEEK ^
Special weather statement, Aug 4, 12:37 PM MDT, 2 hours 47 minutes before
WYZALL-042000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 1240 PM MDT SAT AUG 4 1990 ...THUNDERSTORMS HAVE BEGUN IN WYOMING... AS EXPECTED THUNDERSTORMS HAVE BEGUN TO FIRE AT A NUMBER LOCATIONS. THE YELLOWSTONE AREA IN NORTHWEST WYOMING...THE BIG HORN MOUNTAINS IN THE NORTH AND PARTS OF CENTRAL WYOMING ARE REPORTING THUNDER. THUNDERSTORMS WILL INCREASE IN NUMBER AND INTENSITY THIS AFTERNOON MAINLY IN THE CENTRAL AND EAST. THE AREA BETWEEN LANDER AND CASPER AS WELL AS THE EAST SLOPES OF THE LARAMIE RANGE ALONG INTERSTATE 25 WILL BE FAVORED AREAS FOR DEVELOPMENT. SOUTHEAST WYOMING COULD VERY WELL HAVE SOME SEVERE THUNDERSTORMS ALONG WITH VERY HEAVY RAIN. THUNDERSTORMS WILL MOVE SOUTHEAST VERY SLOWLY WHICH COULD PRODUCE LOCALLY HEAVY RAINFALL AND LEAD TO LOCALIZED FLOODING. < PEOPLE IN EAST WYOMING SHOULD KEEP CLOSE TABS ON DEVELOPING WEATHER THROUGH THE AFTERNOON AND EARLY EVENING AND BE READY TO SEEK INDOORj SHELTER IF THREATENING WEATHER APPEARS. CAS
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.