Tuesday, September 23, 2008

Severe Weather Update (Sep. 23)

A line of showers and thunderstorms has been slowly progressing eastward through the morning and afternoon hours. This line of storms has developed along a differential heating axis that is approximately 50 miles east of the cold front. The cold front will likely move eastward and begin to push these thunderstorms off to the east with time, moving them into central Iowa by evening and into eastern Iowa during the overnight hours.

The Storm Prediction Center did issue a discussion earlier this afternoon indicating that given moderate heating and moisture ahead of the cold front and cloud cover, that a few storms may be capable of severe weather. If this does occur, a severe thunderstorm watch may be issued later this afternoon that may encompass much of the western half of the state. The main threats with any of the storms will be damaging winds and some large hail, although the gusty winds with any storms are likely to be above 40 mph given strong winds in general this afternoon/evening. Any later updates will include the issuance of watches/warnings, or a general update on the progression of the storms.

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