SEL6
SPC WW 200057
IAZ000-ILZ000-200500-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 706
NWS STORM PREDICTION CENTER NORMAN OK
800 PM CDT SAT JUL 19 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTHERN AND EASTERN IOWA
FAR NORTHWEST ILLINOIS
EFFECTIVE THIS SATURDAY NIGHT FROM 800 PM UNTIL MIDNIGHT 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 APPROXIMATELY ALONG AND 50 STATUTE
MILES EITHER SIDE OF A LINE FROM 30 MILES NORTH OF MOLINE
ILLINOIS TO 50 MILES SOUTH OF DENISON IOWA. FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU6).
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 703...WW 704...WW 705...
DISCUSSION...BROKEN LINE OF SUPERCELLS/BOW ECHOES WILL CONTINUE
SAGGING SSEWD ACROSS WW THROUGH THE EVENING WITHIN A VERY UNSTABLE
AIR MASS. WSWLY LLJ FROM 25-30 KT IS FORECAST TO DEVELOP THIS
EVENING ACROSS THIS REGION...ENHANCING LOW LEVEL SHEAR AND POTENTIAL
FOR TORNADOES. DAMAGING WINDS AND ISOLATED LARGE HAIL WILL BE
ADDITIONAL HAZARDS.
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 34035.
...EVANS
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