Tornado Watch 239

Issued

May 7, 2000, 2:30 PM MDT (20:30 UTC)

Expired

May 7, 2000, 8:00 PM MDT

In force

6 hr

Issued by

the Storm Prediction Center

The North Platte radar (KLNX), 101 km from the middle of the area, began a volume at 20:36 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

967 
WWUS9 KMKC 072004
SEL9  
MKC WW 072004
COZ000-NEZ000-SDZ000-WYZ000-080200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 239
STORM PREDICTION CENTER NORMAN OK
204 PM MDT SUN MAY 7 2000

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   EXTREME NORTHEAST COLORADO                           
   WESTERN AND CENTRAL NEBRASKA                           
   SOUTHWEST AND SOUTH CENTRAL SOUTH DAKOTA                       
   EAST CENTRAL WYOMING                            

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 230 PM UNTIL 800
PM MDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 120 STATUTE MILES EAST AND WEST
OF A LINE FROM 80 MILES NORTH NORTHEAST OF CHADRON NEBRASKA TO 15
MILES EAST SOUTHEAST OF IMPERIAL NEBRASKA.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

DISCUSSION...SURFACE PRESSURE FALLS CONTINUE TO FOCUS OVER THE SRN
SD/NRN NEB BORDER AREA...WHERE CYCLOGENESIS IS UNDERWAY DOWNSTREAM
FROM APPROACHING SHORTWAVE TROUGH NOW OVER WRN WY.  AMPLE BOUNDARY
LAYER MOISTURE IN DEVELOPING WARM SECTOR...COUPLED WITH WEAK
UPSLOPE COMPONENTS AND INCREASING DEEP LAYER SHEAR /WSWLY AT 40-50
KTS/...WILL CREATE FAVORABLE ENVIRONMENT FOR SUPERCELLS WITH VERY
LARGE HAIL/HIGH WINDS AND A FEW TORNADOES.    

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. 
MEAN STORM MOTION VECTOR 24030.

...CORFIDI

402,1033 435,1045 435,1000 402,0990

Tornado Watches in Nebraska, 2000Tornado Watches in South Dakota, 2000Tornado Watches in Colorado, 2000Every tornado watch in 2000

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; radar from the NEXRAD Level II archive.