Tornado Watch 656

Issued

Jun 24, 1998, 6:30 PM CDT (23:30 UTC)

Expired

Jun 25, 1998, 1:00 AM CDT

In force

7 hr

Issued by

the Storm Prediction Center

990 
WWUS9 KMKC 242310
SEL6  
MKC WW 242310
NEZ000-SDZ000-MNZ000-IAZ000-250600-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 656
STORM PREDICTION CENTER NORMAN OK
610 PM CDT WED JUN 24 1998

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

   NORTHERN AND EASTERN NEBRASKA                           
   SOUTHEAST SOUTH DAKOTA                       
   SOUTHWEST MINNESOTA                          
   NORTHWEST IOWA                               

EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 630 PM
UNTIL 100 AM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 95 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 45 MILES NORTH OF BURWELL NEBRASKA TO 20 MILES
NORTHEAST OF SPENCER IOWA.

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.

OTHER WATCH INFORMATION...  CONTINUE...WW 652...WW 653...WW
654...WW 655...

DISCUSSION...THREAT FOR TORNADOES EXPECTED TO INCREASE OVER WATCH
AREA THIS EVENING AS 50-60 KT MID-LEVEL SPEED MAX AND ASSOCIATED
SURFACE WAVE NOW OVER N CENTRAL NEB CONTINUE ENEWD.  WARM FRONT NOT
VERY WELL-DEFINED...BUT SUFFICIENT BACKING OF LOW-LEVEL FLOW LIKELY
TO PERSIST ALONG MAJOR AXIS OF WATCH TO SUPPORT LOW-LEVEL STORM
ROTATION GIVEN HIGH SURFACE DEWPOINTS /LOW TO MID 70S/.   

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. 
MEAN STORM MOTION VECTOR 26035.


...CORFIDI

434,0990 444,0945 415,0945 410,0990

Tornado Watches in Nebraska, 1998Tornado Watches in South Dakota, 1998Tornado Watches in Iowa, 1998Every tornado watch in 1998

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.