Friday, October 30th 2009 Weather Outlook

29 10 2009

Friday’s Weather Outlook; Plains/Midwest/Great Lakes/Mississippi Valley/Ohio Valley System, Northwest System

11:00PM

On Friday, a system will through the Midwest. Showers and storms will be likely in portions of the Plains, Midwest, Great Lakes, Ohio Valley and Mississippi Valley, associated with a system pushing through the Midwest. Some storms may become severe in portions of the Southern Mississippi Valely and Gulf Coast.¬†As Cape values will be up to 2500 J/KG, LI’s up to -5 and Effective Bulk Shear values up to 60KT. The lack of forcing will limit the overall severe threat and coverage. The main threats from any storms that become severe, will be damaging winds, hail and an isolated tornado. Flooding rainfall will be likely in portions of the Missisisppi Valley, due to the high moisture content and training storms. On the northside of the system, accumulating snow will be likely in portions of the Plains and Midwest. Accumulations are likely, with up to 6″ being possible in some areas. High winds may create blizzard conditions at times, with blowing and drifting snow. In the Northwest a new system will push into area. This system will bring the chance of rain the the area, with snow being possible in the highest elevations in portions of the Cascades and Rockies. Below are the thunderstorm and snowfall outlooks for Friday.

sev 706

snow 45