Thursday, 18 April 2013

Severe storms possible across the western half of the region today

Severe storms possible across the western half of the region today, Low pressure will deepen as it moves northeastward into the Great Lakes through tonight. A strong cold front trailing this system will slowly advance eastward toward the region.

A strong pre-frontal squall line has already developed from Lake Michigan, southwestward through Illinois. This band of thunderstorms will intensify today as it moves eastward across lower Michigan and into western Ohio late in the day.

View slideshow: Eastern Great Lakes Daily Weather Graphics April 18, 2013
Very strong upper level dynamics will spread across the region as strong jet stream winds surge northeastward across the region. In addition, models show very favorable low level shear, or a turning of the winds with height, ahead of this band.

This set up will favor the development of strong to severe storms capable or producing widespread damaging wind gusts, possibly to hurricane force in some areas, as well as very large hail, and a few strong to violent tornadoes. The greatest threat will be across lower Michigan and northwestern Ohio this afternoon and this evening, coinciding with maximum daytime heating.

The Storm Prediction Center has already placed much of the southern half of lower Michigan and northwestern Ohio under a Tornado Watch.

The thunderstorms will spread eastward across the remainder of Ohio, northwestern Pennsylvania, and western New York later tonight through Friday with the potential for isolated severe storms.


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