Wednesday, May 27th 2009 Weather Outlook

26 05 2009

Wednesday’s Weather Outlook; Great Lakes/Mississippi Valley/Northeast/Southeast System

12:00AM

On Wednesday, two combined system will push eastward through the Great Lakes and Mississippi Valley. Showers and storms will be likely ahead of these systems in portions of the Great Lakes, Mississippi Valley, Southeast and Northeast. There is a slight risk for severe stroms in portions of Texas, Louisiana, Mississippi, Alabama, Arkansas, Tennesse, Kentucky, Illinois, Missouri, Indiana, Ohio and Michigan. CAPE values will be around 3000 J/KG, LI’s of -8 and Shear Values of 25-35KT. This along with a system pushing through, will help storms become severe. Storms will develop ahead of a cold front from Michigan down into Louisiana in the afternoon. Some of these storms will be severe as they push eastward, before weakening in the Evening as diurnal cooling sets in. In Texas, and MCS will be ongoing in the Morning with some severe storms. This complex will weaken and push offshore during the day. In its wake, storms will develop in the late Afternoon, some will be severe. The main threats from the severe storms will be hail, damaging winds and an isolated tornado. In the West, with daytime heating and some instibility. Afternoon showers and storms will be possible across portions of the region. With limited instibility, a few storms may become severe. With the main threats being hail and damaging winds. Below is the thunderstorm outlook for Wednesday.

sev 493


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