Tornado Watch 337

Issued

May 12, 1998, 7:30 PM CDT (00:30 UTC)

Expired

May 13, 1998, 1:00 AM CDT

In force

6 hr

Issued by

the Storm Prediction Center

The Lincoln radar (KILX), 43 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.

420 
WWUS9 KMKC 130018 COR
SEL7  
MKC WW 130018 COR
ILZ000-INZ000-LMZ000-130600-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 337...CORRECTION TO WATCH END POINTS
STORM PREDICTION CENTER NORMAN OK
718 PM CDT TUE MAY 12 1998

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

NORTHERN AND CENTRAL ILLINOIS
EXTREME NORTHWEST INDIANA
SOUTHERN LAKE MICHIGAN

EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 730 PM
UNTIL 100 AM CDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 60 STATUTE MILES EAST AND WEST
OF A LINE FROM 65 MILES SOUTH SOUTHEAST OF SPRINGFIELD ILLINOIS TO
45 MILES NORTH NORTHWEST OF MEIGS FIELD CHICAGO ILLINOIS.

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 332...WW 333...WW
334...WW 335...WW 336...

DISCUSSION...SEVERE STORMS OVER CENTRAL ILLINOIS ARE EXPECTED TO
MOVE EASTWARD AND NORTHEASTWARD TONIGHT IN ASSOCIATION WITH
SOUTHERN END OF UPPER TROUGH MOVING ACROSS THE UPPER MISSISSIPPI
VALLEY.  AIR MASS OVER THE REGION IS MODERATELY UNSTABLE WITH
LIFTED INDEX TO -7.  VAD AND PROFILER WINDS SHOW VEERING WITH
HEIGHT AND SUFFICIENT SHEAR TO MAINTAIN THREAT OF A FEW TORNADIC
SUPERCELLS.


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. 
MEAN STORM MOTION VECTOR 24035.


...WEISS

385,0902 422,0890 422,0864 385,0880

Tornado Watches in Illinois, 1998Tornado Watches in Indiana, 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.