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Powerhouse Storm System to Affect Wisconsin Next Week?

Oct 19, 2010
GFS Model - 300 MB - 162 HoursEarly indications are for the upper air pattern to change and take hold of the U.S. starting this weekend. A very strong powerful jet stream will move onshore the Pacific Northwest and head into the Central U.S. next week. This will result in a strong low pressure system to develop across the Upper Midwest states bringing showers and possibly some thunderstorms. Below is this morning's GFS model depicting a 140-150 mph jet stream across the U.S sometime around Monday. Keep in mind, this type of energy is usually common when heading into the fall months as more cold air is edging closer to the U.S.

Surface PressureThere will be changes in the forecast as this storm system is still 7 days out. Remember, accuracy decreases with time so the computer models will eventually get a better handle on this system at the end of this week and into the weekend. Right now, there is a consensuses there will be finally some needed precipitation across Wisconsin. The GFS model also shows a very strong low pressure system deepening to around 972mb which is a very strong low! However, the model tends to have a bias of generating strong lows this far out. Time will tell and stay tuned!

Update! Thursday October 21, 2010

On Tuesday I mentioned there was a chance of some significant weather heading towards Wisconsin sometime this weekend into next week. It now appears a major storm system will take shape across the Upper Midwest by Monday into Tuesday. Both the GFS and ECMWF model have come into better agreement regarding the surface low intensity and track. However, I should state there are some issues to be yet ironed out regarding these variables. Overall, this system will be a rain and strong wind producer as severe weather is not expected.


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