Tornado Watch 554

Issued

Jun 12, 1998, 2:45 PM CDT (19:45 UTC)

Expired

Jun 12, 1998, 9:00 PM CDT

In force

6 hr

Issued by

the Storm Prediction Center

The Lincoln radar (KILX), 81 km from the middle of the area, began a volume at 19:45 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.

815 
WWUS9 KMKC 121923
SEL4  
MKC WW 121923
ILZ000-INZ000-130200-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 554
STORM PREDICTION CENTER NORMAN OK
223 PM CDT FRI JUN 12 1998

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

   NORTHEASTERN AND CENTRAL ILLINOIS                           
   NORTHERN AND CENTRAL INDIANA                            

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 245 PM UNTIL 900
PM CDT.

THIS IS A PARTICULARLY DANGEROUS SITUATION WITH THE POSSIBILITY OF
VERY DAMAGING TORNADOES.  ALSO...LARGE 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 115 STATUTE MILES EAST AND WEST
OF A LINE FROM 35 MILES WEST SOUTHWEST OF MATTOON ILLINOIS TO 15
MILES WEST NORTHWEST OF SOUTH BEND INDIANA.

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 553...

DISCUSSION...VERY UNSTABLE AIR MASS OVER REGION WITH MUCAPES NEAR
5000 J/KG. APPROACHING SURFACE TROUGH AND UPPER SHORT WAVE SHOULD
THEREFORE SUPPORT INCREASING CONVECTION THROUGH THIS AFTERNOON. MID
LEVEL FLOW NEAR 70 KT WILL PROVIDE SUFFICIENT SHEAR FOR A FEW
TORNADIC SUPERCELLS WITH NUMEROUS LARGE HAIL AND DAMAGING
DOWNBURSTS EVENTS. 

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 500. 
MEAN STORM MOTION VECTOR 26040.


...ROGASH

391,0910 414,0884 414,0842 391,0864

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