Sunday, May 23, 2010

An Extended Period of Very Warm Temperatures

An upper level ridge is situated over the eastern part of the USA, and a trough of low pressure is over the western part of the country.  With the ridge in place over the next several days, the very warm conditons will continue through Thursday.  There will be lots of low level moisture in place for most of the week, so the combination of heat and humidity will serve to make it uncomfortably warm for most people.  There is lots of low level moisture, but it is not very deep, so no widespread heavy thunderstorm activity is expected this week.  There may be some isolated thunderstorms on Monday, and some scattered thunderstorms on Tuesday.  On  Wednesday and Thursday there could be some more isolated thuderstorms.  On early Friday morning a backdoor cool front will slip southward out of Wisconsin across northern Illinois.  The moist air will be pushed southward by the cool front, and temperatures will be knocked down a few degrees under sunny skies with cooler Canadian air moving into the Stateline.  High temperatures on Friday, Saturday, and Sunday will be in the upper 70's to low 80's.
By Meteorologist
Eric Nefstead

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