Severe Thunderstorm Warning 55, NWS Cheyenne, WY

Issued

Jul 1, 2001, 4:26 PM MDT (22:26 UTC)

Expired

Jul 1, 2001, 5:30 PM MDT

In force

64 min

Issued by

NWS Cheyenne, WY

Area

Whole counties

County Morrill County, NE

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.

000 
WUUS55 KCYS 012229
SVRCYS

NEC123-012330-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
426 PM MDT SUN JUL 1 2001

THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN MORRILL COUNTY IN THE PANHANDLE OF NEBRASKA

* UNTIL 530 PM MDT...THIS WARNING REPLACES THE PREVIOUS WARNING
  THAT WAS ISSUED FOR EASTERN MORRILL COUNTY.

* AT 423 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER BROADWATER...OR ABOUT 33 MILES SOUTH OF
  ALLIANCE...MOVING SOUTH AT 20 MPH.

AT 425 PM MDT...GOLF BALL SIZE HAIL WAS REPORTED WITH THIS 
THUNDERSTORM 3 MILES EAST OF BROADWATER.

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.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

LAT..i.LON 4173 10272 4168 10295 4144 10290 4144 10264

DAUGHERTY

NWS Cheyenne, WY wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 1, 1:45 PM MDT, 2 hours 41 minutes earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
145 PM MDT SUN JUL 1 2001

APPEARS TO BE ENOUGH SUBSIDENCE BEHIND UPPER FEATURE MOVING INTO
PLAINS THAT IT IS INHIBITING DEVELOPMENT THIS AFTERNOON.  STILL
EXPECT SOME STORMS TO FIRE ON WEAK BOUNDARIES...LIKE ONE FROM ARL TO
LAR AND ANOTHER ONE ACROSS W LARAMIE COUNTY.  AIRMASS ALSO REMAINS
STRONGLY CAPPED.  FRONT HAS RETREATED N...NOW NEAR S EDGE OF LOW
CLOUDS FROM LUSK TO N OF AIA.  NEXT S/WV TROF APPEARS TO BE THE ONE
BACK OVER CENTRAL UT TURNING NNE AROUND UPPER HIGH.  AVN LIKELY TOO
STRONG AND FAST WITH THIS FEATURE...WILL LEAN TOWARD MESOETA WHICH
DOES BRING IT INTO OUR AREA...MAINLY LATER THIS EVENING.  FEATURE
WEAKENS WITH TIME...BUT MAY BE ENOUGH FOR SOME TSTMS ON MON
AFTERNOON SE WY.  FRONT FCST TO REMAIN ABOUT WHERE IT IS NOW THROUGH
MON...WITH ANOTHER HOT DAY LIKELY ON MON S OF FRONT.  IN LONGER RANGE
...THE ETA IS STRONGEST WITH A FEATURE WHICH MOVES INTO THE REGION
ON MON EVENING.  AVN ALSO SUGGESTS IT IS THERE.  BOTH MODELS HAVE
DECENT RISING MOTION WITH FEATURE...WITH SOME RAIN...AND ALSO USE IT
TO HELP FORCE FRONT S AGAIN MON NIGHT.  TUE LOOKS TO BE A BIT COOLER
E OF MTNS WITH SFC HIGH BUILDING INTO MT/DAKS...BUT AGAIN CAN'T RULE
OUT A FEW LATE DAY STORMS.  IN EXTENDED...NOT MUCH CHANGES...UPPER
HIGH SHIFTS A LITTLE WNW INTO UT...THEN DROPS SE INTO CO...WHILE
FLOW ALOFT BECOMES A BIT MORE NW OVER REGION.  WILL GIVE UP ON IDEA
OF NOTICEABLY COOLER WEATHER SLIPPING INTO REGION...ALTHOUGH APPEARS
THAT WED/THU SHOULD BE A BIT COOLER...THEN WARMER AGAIN ON FRI/SAT.
HOWEVER...TEMPS NOT CHANGING BY MUCH MORE THAN 5 TO 8 DEGREES...NOT
REALLY WORTH BREAKING OUT SPECIFIC DAYS FOR.  THREAT OF LATE DAY
STORMS CONTINUES...ESPECIALLY E OF MTNS WHERE IT LOOKS LIKE DECENT
MOISTURE WILL CONTINUE TO BE IN PLACE.

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

JAD

Severe Thunderstorm Warnings in Nebraska, 2001Every severe thunderstorm warning in 2001

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.