Tornado Watch 649

Issued

Jun 23, 1998, 7:30 PM CDT (00:30 UTC)

Expired

Jun 24, 1998, 1:00 AM CDT

In force

6 hr

Issued by

the Storm Prediction Center

The Sioux Falls radar (KFSD), 126 km from the middle of the area, began a volume at 00:32 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.

676 
WWUS9 KMKC 240018
SEL9  
MKC WW 240018
SDZ000-NEZ000-MNZ000-IAZ000-240600-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 649
STORM PREDICTION CENTER NORMAN OK
718 PM CDT TUE JUN 23 1998

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

   EXTREME SOUTHEASTERN SOUTH DAKOTA                       
   NORTHEAST NEBRASKA                           
   EXTREME SOUTHERN MINNESOTA                          
   NORTHWEST AND NORTH CENTRAL IOWA                               

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 730 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 70 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 45 MILES NORTHWEST OF SIOUX CITY IOWA TO 30
MILES EAST SOUTHEAST OF MASON CITY 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 647...WW 648...

DISCUSSION...SUPERCELL STORMS CONTINUE TO INTENSIFY OVER NORTHEAST
NEB.  DEVELOPMENT SHOULD CONTINUE ALONG BOUNDARY ACROSS NWRN/N
CENTRAL IA WITH LOW LEVEL JET OF 40 KT EXTENDS NWD THROUGH ERN NEB
AND CENTRAL IA.  VAD WIND PROFILES INDICATE DEEP VERTICAL SHEAR TO
SUPPORT FURTHER SUPERCELL DEVELOPMENT.


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 600. 
MEAN STORM MOTION VECTOR 26035.


...MCCARTHY

435,0970 435,0924 415,0924 415,0970

Tornado Watches in Iowa, 1998Tornado Watches in Minnesota, 1998Tornado Watches in Nebraska, 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; radar from the NEXRAD Level II archive.