Friday, July 26, 2013

Why the Weekend Chill?

A fall-like weekend is setting up--very uncommon for lat July!  A cold front passed through the Stateline Friday evening with the center of the low pressure system relatively close by.
Friday Night - Cold Front Passes
Usually when cold fronts pass through our area in the summer-time, skies are clear the next day and the sun can heat up the earth and allow temps to rebound a little bit.  But, because the main low pressure system is passing relatively close to the Stateline in the Midwest, there will be wrap around moisture on the back end of the system causing for dense clouds to build in Saturday.  Couple this with a growing high pressure feature over the Central Plains, and winds are going to flow in from Canada bringing in cooler air.  Because of this, temps will barely skim 70° in the afternoon.  In fact, most of Saturday will be spent in the mid 60s.
Saturday Setup - Relatively Cool
The last time we had a July day at or below 70° was four years ago, and the coolest high temperature Rockford has ever had on July 27th was 67° back in 1982.  We're going to give that record a run for its money this weekend. - MT

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