Weather Underground Forecast for Wednesday, June 12, 2013.
A severe weather event is expected in the Midwest on Wednesday as a strengthening disturbance reaches across the Ohio Valley.
In the Midwest, a cold front extending across the Great Lakes will drop southward and reach across the Ohio Valley to the southern New England coast by Wednesday afternoon. Low pressure on the western edge of this front in the Central Plains will trek eastward across the Mid-Mississippi Valley through the day reaching the western Ohio Valley by Wednesday evening. Rich gulf moisture pooling along this system will trigger showers and thunderstorms from the Northern Plains through the Ohio Valley and Upper Great Lakes into the Mid-Atlantic states. Areas of eastern Illinois through western Ohio are at moderate risk of a widespread severe weather event, mainly in the form of damaging wind gusts and large hail from Wednesday afternoon through the evening. Major cities in this moderate risk area include Chicago, Indianapolis, Columbus, Cincinnati, and Ft. Wayne, IN. Residents in this moderate risk area are encouraged to monitor their local weather conditions throughout the day and take proper precautions against inclement weather. Areas surrounding this moderate risk region, from a large part of the Ohio Valley and the southern Great Lakes into the Mid-Atlantic, are at slight risk of severe weather development with similar primary threats.
Elsewhere, a frontal system and trough of low pressure will trek eastward across the Northwest, kicking up showers and thunderstorms in areas from the Northern Intermountain West through the Northern High Plains. Isolated severe storms may develop in the region with damaging winds and hail possible. In the East, wet weather in the Northeast will gradually diminish as low pressure over the region moves offshore, away from the coast.
Temperatures in the Lower 48 states Tuesday have ranged from a morning low of 34 degrees at Meacham, Ore. to a high of 109 degrees at Lamar, Colo.