Tuesday, April 21st 2009 Weather Outlook

20 04 2009

Tuesday’s Weather Outlook; Great Lakes/Northeast/Southeast System

10:30PM

On Tuesday, a system will continue to slowly push east through the Great Lakes, as a system enters the far Northwest. Showers and storms will be likely in portions of the Southeast and Northeast,as a wave works in behind the main system pushing through the Great Lakes.With limited instibility and low freezing levels, a few storms may become severe in portions of the Mid-Atlantic Region. The main threat will be hail. On the north side of the system, snow will be possible in portions of Wisconsin and Michigan. Some accumulation is likely. In the Northwest, showers and storms will be possible on the north side of a dome of warmth sitting over the region, as a system clips the region. With limited instibility, a few storms may become severe. With the main threats being haila nd damaging winds. Below is the thunderstorm and snowfall outlook for Tuesday.

sev-437

snow-243





Monday, April 20th 2009 Weather Outlook

20 04 2009

Monday’s Weather Outlook; Great Lakes/Southeast/Northeast System

12:00PM

On Monday, a system will continue to push northeast into the Great Lakes. Showers and storms will be possible over portions of the Great Lakes, Northeast and Southeast. There is a slight risk for severe storms in portions of Florida, Georiga, South Carolina, North Carolina, Virginia, Maryland and Deleware. CAPE values will be around 1500 J/KG, LI’s of -6, and Effective Bulk Shear values of 45-60KT. This along with a system pushing through, will help storms become severe. Severe storms will develop along and ahead of the cold front in the Afternoon, from Virginia down into Georiga. These storms will push east, before weakening in the Evening. The main threats will be hail, damaging winds, and an isolated tornado. In the Southern Great Lakes and Ohio Valley, a weak wave will push through on the backside of the main system. With limited instibility and low freezing levels, some storms may become severe with a small hail threat .On the north side of the system, snow will be possible in portions of Minnesota, Wisconsin and Michigan. Some accumulation is likely. Below is the severe weather and snowfall outlook for Monday.

sev-436

snow-242