Sunday, June 27, 2010

It's About Time For a Change

The first in as series of cool fronts is sweeping across the northern part of Illinois as the pattern switches from being very warm and humid with repeated rounds of thunderstorms to cooler and drier with very comfortable conditions for the next several days. The jet stream will be diving in from the north to our west for the next couple of days allowing Canadian air from the Hudson bay region to overspread the upper midwest. There will be lots of sunshine, too  There is a possibility of some isolated afternoon showers on Monday to the north of the Wisconsin state line as the next cool front barrels in from the north.  There will be a limited amount of low level instability which could kick up some showers mid-day through the afternoon.  Other than that it is expected to be mostly sunny on Monday with fair weather cumulus clouds gracing a beautiful blue sky.  Skies will clear on Monday night and the Stateline will see the coolest overnight low in several weeks, dropping to the middle 50's.  A surface high pressure ridge from Canada will take full control of area weather from Tuesday through Friday as is inches slowly eastward across the area.  Skies will be sunny in the daytime and clear at night.  This is about as nice a period of weather that you can expect this time of year as we head into July.  Temperatures will gradually warm as the high shifts to the east late in the week.  By the time the weekend arrives the heat and humidity will return on the heels of a southerly wind.  With the approach of the next cool front on Sunday, there could be some scattered thunderstorms.
By Meterologist
Eric Nefstead

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