There is a temporary shift in the weather pattern that will take temperatures down to average levels for the next few days. The monster upper high that caused the string of 100 degree days is retrograding into the western states. The is allowing the upper air flow to come out of Canada. Surface high pressure from Canada will move into the northern plains by early Monday. It will push a dissipating re-enforcing cool front across the area around daybreak. A weak disturbance associated with the front could cause a stray thunderstorm to pop during the afternoon. The liklihood of precipitation across any part of northern Illinois on Monday afternoon is not greater than 15%. The sad part of this story is that is the best chance our are will have of getting precipitation all week. High temperatures on Monday will be in the middle 80's. The low temperatures on Monday night will be in the low 60's. The air conditioners will get a break, and get a chance to shut off during the late night hours for the next few nights.
The Canadian high will dominate Stateline weather for most of the coming week. It will be sunny to mostly sunny from Monday through Friday. High temperatures will be in the middle 80's for most of the week, and lows will be in the low to middle 60's for most of the week. The high will move off the east coast by late week, and temperatures will start to edge back up again reaching the upper 80's by Friday, the low 90's by Saturday, and the low to possibly mid 90's by Sunday. By Sunday southerly breezes will begin to tap moisture from the Gulf of Mexico leading to higher dew points, and more uncomfortable conditions. Little if any precipitation is anticipated during the next 7 days. The moderate drought that has developed will intensify futher during the next week. This is very bad news for northern Illinois farmers.
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