Friday, August 21st 2009 Weather Outlook

21 08 2009

Friday’s Weather Outlook; Great Lakes/Northeast/Mid-Atlantic/Southeast/Gulf Coast System

12:00PM

On Friday, a system will continue to push through the Great Lakes. Showers and storms will be likely in portions of the Great Lakes, Northeast, Mid-Atlantic, Southeast and Gulf Coast, associated with this system. There is a slight risk for severe storms in portions of New York, New Hampshire, Vermont, Maine, Conneticut, Rhode Island, Massachusetts, New Jersey, Pennsylvania, Delware and Virginia. CAPE values will be around 3500 J/KG, LI’s of -7 and effective Bulk Shear values of 25-55KT. Severe storms will develop during the early Afternoon from along and ahead of the cold front from New York down into Virginia. these storms will push eastward intot he evening, before pushing offshore or weakening as diurnal coolign sets in. The main threats from the severe storms will be damagign winds, hail and an isolated tornado. Further south along the cold front in portions of the Southeast and Gulf Coast, some storms may become severe. As CAPE values will be around 3000 J/KG, LI’s of -8 and effective Bulk Shear values up to 25KT. Limited shear and forcing will limit the overall severe threat and coverage, which will preclude a slight risk from being issued. The main threats from any storms that become severe, will be damaging winds, hail and an isolated tornado. In the Northwest, a new system will begin to move in. With limited instibility, a few storms may become severe. With the main threats being hail and damaging winds.Below is the severe weather outlook for Friday.

sev 620


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