Severe Thunderstorm Warning 15, NWS Cheyenne, WY

Issued

Jun 2, 2002, 7:47 PM MDT (01:47 UTC)

Expired

Jun 2, 2002, 8:15 PM MDT

In force

28 min

Issued by

NWS Cheyenne, WY

Area

Counties, with a storm outline in the text

County Niobrara County, WY

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

929 
WUUS55 KCYS 030147
SVRCYS
WYC027-030215-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
745 PM MDT SUN JUN 2 2002

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EXTREME NORTHEASTERN NIOBRARA COUNTY IN EAST CENTRAL WYOMING

* UNTIL 815 PM MDT

* AT 740 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER NORTH CENTRAL NIOBRARA COUNTY...SOME 50
  MILES NORTH OF LUSK...MOVING EAST TO NORTHEAST AT 20 MPH.

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE
THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN
EXCESS OF 55 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN.

HAIL UP TO ONE INCH IN DIAMETER HAS BEEN REPORTED WITH THIS STORM. 
IF YOU ARE IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND 
MOVE TO A SUBSTANTIAL SHELTER.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN CHEYENNE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM MDT SUNDAY
EVENING FOR EAST CENTRAL WYOMING. A SEVERE THUNDERSTORM WATCH ALSO
REMAINS IN EFFECT UNTIL 1000 PM MDT SUNDAY EVENING FOR THE PANHANDLE
OF NEBRASKA.

THIS WARNING REPLACES THE SEVERE THUNDERSTORM WARNING FOR NORTHERN
NIOBRARA COUNTY THAT EXPIRED AT 745 PM.

LAT...LON 4351 10443 4334 10441 4334 10406 4350 10407

&&

JLH                    

WCJIN-WYNE

NWS Cheyenne, WY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 2, 3:35 PM MDT, 4 hours 12 minutes earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
335 PM MDT SUN JUN 2 2002

BOUNDARY REMAINS ACROSS THE SOUTHEAST PLAINS...SEPERATING AIR WITH
DEWPOINTS IN THE 40S AND 50S FROM DEWPOINTS IN THE 20S.  CU FIELD
STILL PRETTY FLAT AROUND CHEYENNE. DOPPLER RADAR SHOWS A FEW SHOWERS
TRYING TO DEVELOP ALONG THE BOUNDARY IN PLATTE AND GOSHEN COUNTIES
BUT NOT DOING TOO WELL ONCE THEY PULL OFF THE BOUNDARY. ALSO LOOKS
LIKE CONVECTION BEING INHIBITED BY RIGHT EXIT REGION OF A SPEED MAX
WHICH WORKED ITS WAY IN THE FROM THE SOUTHWESTERN U.S. EARLIER THIS
MORNING.  DONT PLAN ON DOING TOO MUCH WITH THE CHANCE OF
THUNDERSTORMS OVER THE SOUTHEAST PLAINS OR SOUTHERN PANHANDLE...WITH
ONLY BETTER CHANCE OF EVENING THUNDERSTORMS ON WEST AND NORTH SIDE
OF CWA...NOTE SEVERE THUNDERSTORM WATCH ACROSS CONVERSE AND
NIOBRARA COUNTIES UNTIL 800 PM.  COLD FRONT WILL BE DROPPING ACROSS
CWA LATER TONIGHT AND MONDAY...BRINGING CLOUDS AND AN INCREASING
CHANCE OF RAIN.  MESO ETA SHOWS A SMALL POCKET OF SUB ZERO DEGREE AIR
AT 700 MB MONDAY NIGHT...WITH THICKNESS VALUES ONLY MAKING IT TO
5570-5590 METERS...SO PLAN TO KEEP MENTION OF ANY SNOW CONFINED TO
THE MOUNTAINS THOUGH LARAMIE MAY BE CLOSE. STILL SHOULD HAVE SOME
LINGERING SHOWERS EARLY ON TUESDAY UNTIL TROF AXIS MOVES AWAY.  WILL
KEEP MENTION OF SOME SHOWERS INTO THE AFTERNOON DUE TO LAPSE RATE
GETTING CRANKED OVER BY COLD AIR ALOFT AND SOME INSOLATION.
TEMPERATURES FINALLY START REBOUNDING BY MIDWEEK AS UPPER RIDGE MOVES
IN.

IN THE EXTENDED FORECAST PERIOD...
ZONAL FLOW WILL OCCUR OVER THE FORECAST AREA ON THURSDAY...AS UPPER
HIGH IS CENTERED OVER 4 CORNERS AREA.  SOUTHWEST FLOW DEVELOPS ALOFT
ON FRIDAY AS UPPER LEVEL TROUGH MOVES INTO THE PACIFIC NORTHWEST.
COOLER WITH A CHANCE OF SHOWERS AND AFTERNOON THUNDERSTORMS ACROSS
THE CWA FOR SATURDAY AND SUNDAY AS UPPER LEVEL TROUGH MOVES ACROSS
WYOMING AND ONTO THE PLAINS.  BREEZY CONDITIONS WILL ALSO OCCUR WITH
THE PASSAGE OF THE TROUGH.

.CYS...
WY...NONE.
NE...NONE.

RGB/KMD

Severe Thunderstorm Warnings in Wyoming, 2002Every severe thunderstorm warning in 2002

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.