Tornado Watch 653

Issued

Jul 6, 2003, 11:45 AM CDT (16:45 UTC)

Expired

Jul 6, 2003, 6:00 PM CDT

In force

6 hr

Issued by

the Storm Prediction Center

The Quad Cities radar (KDVN), 108 km from the middle of the area, began a volume at 16:49 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 1647Jul 6, 7:45 AM CDT
• Mesoscale Discussion 1648Jul 6, 9:48 AM CDT
• Mesoscale Discussion 1650Jul 6, 12:36 PM CDT
• Mesoscale Discussion 1653Jul 6, 2:00 PM CDT
• Mesoscale Discussion 1657Jul 6, 5:28 PM CDT

000 
WWUS20 KWNS 061648
SEL3  
SPC WW 061645
IAZ000-ILZ000-INZ000-WIZ000-LMZ000-062300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 653 
NWS STORM PREDICTION CENTER NORMAN OK 
1145 AM CDT SUN JUL 6 2003

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

       EASTERN IOWA
       NORTHERN ILLINOIS
       FAR NORTHWEST INDIANA
       SOUTH CENTRAL AND SOUTHEAST WISCONSIN
       LAKE MICHIGAN

EFFECTIVE THIS SUNDAY MORNING AND EVENING FROM 1145 AM UNTIL 600
PM CDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 100 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 50 MILES NORTHEAST OF MEIGS FIELD ILLINOIS TO
55 MILES WEST NORTHWEST OF MOLINE 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.




DISCUSSION...VORT CENTER AND 35-45 KT MID LEVEL SPEED MAX NOW MOVING
ACROSS ERN IA WILL CONTINUE EWD THIS AFTERNOON.  AHEAD OF IT...A
VERY UNSTABLE AIR MASS WILL DEVELOP GIVEN DEW POINTS IN THE LOWER
70S AND TEMPS IN THE 80S.  SEVERAL WEAK SURFACE BOUNDARIES ARE ALSO
PERSISTING OVER NRN IL/SRN WI FROM EARLIER CONVECTION. EXPECT
SEVERE THUNDERSTORMS WILL DEVELOP WITHIN THE NEXT HOUR OR SO OVER
THIS AREA AND PERSIST INTO THE EARLY EVENING.  DEEP LAYER SHEAR IS
SUPPORTIVE OF SUPERCELLS... WITH EVENTUAL EVOLUTION INTO A BOW ECHO
POSSIBLE DURING THE LATE AFTERNOON.  DAMAGING WINDS WILL BE PRIMARY
SEVERE THREAT...THOUGH ISOLATED TORNADOES ARE ALSO ANTICIPATED NEAR
THE VORT CENTER AND INVOF SURFACE BOUNDARIES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 25030.


...EVANS

405,0865 401,0912 431,0912 434,0865

Tornado Watches in Illinois, 2003Tornado Watches in Wisconsin, 2003Tornado Watches in Iowa, 2003Every tornado watch in 2003

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.