Thursday, October 22nd 2009 Weather Outlook

21 10 2009

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

11:30PM

On Thursday, a system will push through the Northeast, as a system pushes through the Plains, and a new system enters the Northwest. Rain will be possible in portions of the Northwest, as a system quickly moves through. Snow will be possible in portions of Maine, where a general 1-3″ of accumulation will be possible. In the Plains, a system will continue to push through the area. Showers and storms will be possible in portions of the Plains, Midwest, Mississippi Valley, Great Lakes and Ohio Valley, associated with this system. There is a slight risk fo rsevere storms in portions of Texas, Louisiana, Arkansas and Missisippi. CAPE values will be aroudn 1000 J/KG, LI’s up to -5 and Effective Bulk Shear value sup to 60KT. High helicity values and winds turing with height will help to promote a high tornado threat, even though instibility will be limited. The main threats from any severe storms will be damaging winds, hail and a few tornadoes. On the backside of this system, snow will be possible in a swath from Colorado and Kansas up into Nebraska, Iowa and Minnesota. Accumulations of 3-6″ or more will be likely in portions of Colorado and Nebraska, with lower amounts elsewhere. In the Northwest, a new system will push intot he area, bringing a chance of rain to the area. Snow will be possible in the higher elevations of the Rockies. Below are the severe weather and snowfall outlooks for Thursday.

sev 695

snow 34





October 19-24th 2009 Plains/Midwest/Great Lakes “Winter” Storm

21 10 2009

Monday-Saturday Plains/Midwest/Great Lakes “Winter” Storm

12:00PM

Yet anothe rsystem will push through the Central US, brining the chance of accumulating snow to some areas. The storm system will move from the Panhandle of Texas, up into Missouri and into the Great Lakes by Saturday. A swath of snow will be likely on the north side of the system.  A general 1-3″ of snow will be likely in portions of the Plains into the Great Lakes. There will be higher accumulations of over 6″ back towards Nebraska, Kansas, Colorado and New Mexico. In this area dynamic cooling will be stronger, also an upsloap flow along the Front Range of the Rockies will increase accumulations. Below is the snowfall forecast for this system.

snow 38





Wednesday, October 21st 2009 Weather Outlook

21 10 2009

Wednesday’s Weather Outlook; Plains/Midwest/Great Lakes System, Northwest System

12:00PM

On Wednesday, a system will push intot he Plains, while a system pushes through the Northwest. Showers and storms will be likely in portions of the Plains, Midwest and Great Lakes, as a system pushes into the Plains. On the backside of the system, snow will be likely along the Front Range of the Rockies, and in portions of the Plains and Northern Great Lakes. Several inches of accumulation can be expected, especially back into the higher elevations of Colorad and New Mexico. In the Northwest, a weak system will continue to push through the area. Bringing a chance of rain to the area, with snow being possible in the higher elevaitons. Below are the thunderstorm and snowfall outlooks for Wednesday.

sev 694

snow 32