Tornado Watch 859

Issued

Oct 18, 2004, 5:05 PM CDT (22:05 UTC)

Expired

Oct 18, 2004, 10:00 PM CDT

In force

5 hr

Issued by

the Storm Prediction Center

The Paducah radar (KPAH), 87 km from the middle of the area, began a volume at 22:07 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.

• Mesoscale Discussion 2325Oct 18, 1:55 PM CDT
• Mesoscale Discussion 2327Oct 18, 3:41 PM CDT
• Mesoscale Discussion 2330Oct 18, 6:05 PM CDT
• Mesoscale Discussion 2331Oct 18, 9:09 PM CDT

000 
WWUS20 KWNS 182213
SEL9  
SPC WW 182205
ILZ000-INZ000-KYZ000-MOZ000-190300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 859
NWS STORM PREDICTION CENTER NORMAN OK
505 PM CDT MON OCT 18 2004

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

       SOUTHERN ILLINOIS
       EXTREME SOUTHWESTERN INDIANA
       WESTERN KENTUCKY
       SOUTHEAST MISSOURI

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 505 PM UNTIL 1000
PM CDT.

TORNADOES...HAIL TO 2.5 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 50 MILES NORTH OF POPLAR BLUFF MISSOURI TO 30
MILES SOUTHEAST OF EVANSVILLE 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...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 856. WATCH NUMBER 856 WILL NOT BE IN EFFECT AFTER 505
PM CDT. CONTINUE...WW 857...WW 858...

DISCUSSION...TORNADIC SUPERCELLS ARE EXPECTED TO PERSIST FOR A FEW
MORE HOURS AS THEY MOVE EWD AT 40 KT ALONG WARM FRONT THAT STRETCHES
ESEWD SOUTH OF A STL-EVV LINE. AIR MASS ALONG AND SOUTH OF THE WARM
FRONT REMAINS STRONGLY UNSTABLE AND LOW/DEEP LAYER SHEAR IS
FAVORABLE FOR SUPERCELLS WITH LARGE HAIL AND ISOLATED TORNADOES.
NORTH OF THE WARM FRONT...LARGE HAIL WILL BE THE MAIN SEVERE WEATHER
THREAT.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 28035.


...IMY

382,0902 384,0870 364,0870 362,0902

Tornado Watches in Illinois, 2004Tornado Watches in Kentucky, 2004Tornado Watches in Missouri, 2004Every tornado watch in 2004

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.