[LeArc] Severe Thunderstorm Watch for Macomb, IL

[Duane Whittingham]

Severe Thunderstorm Watch
urgent - immediate broadcast requested
Severe Thunderstorm Watch number 15
NWS Storm Prediction Center Norman OK
1130 am CST Mon Mar 1 2004

The NWS Storm Prediction Center has issued a
Severe Thunderstorm Watch for portions of

Eastern Iowa
northern Illinois
northwest corner Indiana
southern Wisconsin
Lake Michigan

Effective this Monday morning and afternoon from 1130 am until 
500 PM CST.

Hail to 2 inches in diameter...thunderstorm wind gusts to 70
mph...and dangerous lightning are possible in these areas.

The Severe Thunderstorm Watch area is along and 95 statute miles
north and south of a line from 10 miles west southwest of Cedar
Rapids Iowa to 5 miles southeast of Meigs Field Illinois.

Remember...a Severe Thunderstorm Watch means conditions are
favorable for 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. Severe thunderstorms can and occasionally do produce
tornadoes.



Discussion...ahead of the strong low moving ewd from wrn IA 
heating has resulted in the air mass becoming sufficiently 
unstable to support development of strong/severe thunderstorms 
across watch area.  With steep lapse rates in place and low 
freezing levels coupled with MDT/stg deep layer shear...storms 
will quickly develop hail potential as they spread ewd.  With 
favorable veering shearprofiles...potential for isolated 
supercells will improve during afternoon increasing threat for 
damaging winds.

Aviation...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 450. Mean storm
motion vector 24035.


...Hales

;431,0915 431,0873 402,0873 402,0915;

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Duane Whittingham (N9SSN) - Producer
Tom and Darryl Radio Shows & Saturday Morning Confusion
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