Tornado Watch 619

Issued

Jul 13, 2004, 10:55 AM CDT (15:55 UTC)

Expired

Jul 13, 2004, 5:00 PM CDT

In force

6 hr

Issued by

the Storm Prediction Center

The Quad Cities radar (KDVN), 98 km from the middle of the area, began a volume at 15:54 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 1643Jul 13, 10:32 AM CDT
• Mesoscale Discussion 1645Jul 13, 1:39 PM CDT
• Mesoscale Discussion 1647Jul 13, 2:30 PM CDT

000 
WWUS20 KWNS 131555
SEL9  
SPC WW 131555
IAZ000-ILZ000-132200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 619
NWS STORM PREDICTION CENTER NORMAN OK
1055 AM CDT TUE JUL 13 2004

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

       EASTERN IOWA
       NORTHERN AND CENTRAL ILLINOIS

EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 1055 AM UNTIL
500 PM 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 85 STATUTE MILES EAST AND WEST
OF A LINE FROM 30 MILES EAST NORTHEAST OF DUBUQUE IOWA TO 15 MILES
SOUTHWEST OF BLOOMINGTON 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...EXTREME INSTABILITY ERN IA SPREADING INTO IL AHEAD OF
VIGOROUS UPPER TROUGH.  RAPID SEVERE THUNDERSTORM DEVELOPMENT WILL
OCCUR AHEAD OF COLD FRONT ACROSS NERN IA/NWRN IL. 40-50KT OF DEEP
LAYER SHEAR COUPLED WITH MUCAPES ABOVE 5000 J/KG WILL SUPPORT
SUPERCELLS WHICH WILL ENHANCE LARGE HAIL AND TORNADO THREAT.

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 30030.


...HALES

423,0883 401,0873 401,0904 423,0915

Tornado Watches in Illinois, 2004Tornado Watches in Iowa, 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.