Severe Thunderstorm Warning 111, NWS Cheyenne, WY

Issued

Sep 2, 1990, 3:00 PM MDT (21:00 UTC)

Expired

Sep 2, 1990, 3:30 PM MDT

In force

30 min

Issued by

NWS Cheyenne, WY

Area

Whole counties

Counties Goshen County, WY, Laramie County, WY

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

000 
TTAA00 KCYS 022103
SVRCYS
WYC015-021-022130-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
300 PM MDT SUN SEP 2 1990
 
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  330 PM MDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
 
IN SOUTHEAST WYOMING
          ...SOUTHERN GOSHEN...NORTHEASTERN LARAMIE
 
THIS WARNING INCLUDES THE TOWNS OF LA GRANGE AND HAWK SPRINGS.
 
AT 3 PM MDT WEATHER RADAR CONTINUED TO INDICATE A LINE OF SEVERE
THUNDERSTORMS WHICH EXTENDED FROM SOUTHERN GOSHEN COUNTY TO NORTH
CENTRAL LARAMIE COUNTY. THE STRONGEST STORM WAS LOCATED ABOUT 22 MILES
NORTHEAST OF CHEYENNE. STORMS WERE MOVING NORTHEAST AT 15 MILES AN
HOUR.
 
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 WINDeOWS UNTIL THE STORM HAS PASSED.
 
MENTZER

In the hours before

WYZ017-022015-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
110 PM MDT SUN SEP 2 1990

...THUNDERSTORMS DEVELOP ACROSS SOUTHEAST WYOMING...

AT 105 PM MDT WEATHER RADAR INDICATED A BAND OF SHOWERS AND
THUNDERSTORMS ACROSS THE LARAMIE MOUNTAINS ABOUT 40 MILES WEST OF
WHEATLAND. A FEW STORMS ALSO DEVELOPED BETWEEN CHEYENNE AND LARAMIE.
STORMS WERE MOVING NORTHEAST AT 15 MILES AN HOUR.

THE AIR MASS OVER SOUTHEAST WYOMING WILL BECOME MORE UNSTABLE THIS
AFTERNOON. THIS WILL CONTINUE TO PRODUCE SCATTERED THUNDERSTORMS.
SOME STORMS WILL CONTAIN SMALL HAIL...FREQUENT LIGHTNING...AND BRIEF
HEAVY RAIN.

IF A THUNDERSTORM APPROACHES YOUR AREA...MOVE INSIDE A REINFORCED
BUILDING IMMEDIATELY.

MENTZER

WYZ012-016-017-022115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
200 PM MDT SUN SEP 2 1990

...STRONG THUNDERSTORMS CONTINUE TO DEVELOP OVER SOUTHEAST WYOMING...

AT 150 PM MDT STRONG THUNDERSTORMS CONTINUED TO BUILD OVER SOUTHEAST
WYOMING. AT THAT TIME THE STRONGEST STORMS WERE IN A LINE FROM 15 MILES
SOUTHWEST OF TORRINGTON TO ABOUT 15 MILES WEST OF CHEYENNE. THE STORMS
WERE MOVING NORTHEAST AT 20 MILES AN HOUR...WHILE THE LINE ITSELF HAS
MOVED ONLY SLOWLY EAST.

THESE STORMS WILL LIKELY PRODUCE HEAVY RAIN...SMALL HAIL...DANGEROUS
LIGHTNING AND GUSTY WINDS. SINCE THE STORMS WERE MOVING OVER ROUGHLY
THE SAME AREA...SOME FLOODING OF LOW LYING AREAS AND SMALL STREAMS
MAY BE POSSIBLE.

UNTIL 300 PM MDT THE STORMS WILL AFFECT THE CITIES OF TORRINGTON AND
HAWK SPRINGS AS WELL AS RURAL AREAS BETWEEN TORRINGTON AND WEST OF
CHEYENNE. PEOPLE IN SOUTHEAST WYOMING...ESPECIALLY THOSE IN THE PATH
OF THE LINE OF THUND"ERSTORMS SHOULD BE PREPARED FOR THE STORMS AND
WHEN A STORM NEARS...TAKE IMMEDIATE SHELTER.
WEILAND

Severe Thunderstorm Warnings in Wyoming, 1990Every severe thunderstorm warning in 1990

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.