Temperatures for the week peaked on Tuesday with a high temperature at the Rockford Airport of 62 degrees. It was a fabulous late March day with full sunshine, blue skies, low humidity, and light winds. A series of weather systems will affect the Stateline during the next week taking the area on a roller coaster ride with temperatures. The trend will be downward for the next 3 days. Temperatures will top out in the middle 50's on Wednesday, and the upper 40's on Thrusday and Friday. On Saturday it will recover into the middle 50's before dropping back to near 50 degrees on Sunday, and the upper 40's on Monday. Tuesday looks like the start of a significant warm up that may last for a few days. It will be in the middle 50's on Tuesday, and as of this time it looks like we will see temperatures above 70 degrees on Wednesday or Thursday. Remember, Thursday of next week is the 1st day of April.
Now let's take a look at the weather features that will cause the fluctuations in temperatures over the next week. A weak cool front and it associated low pressure system over eastern Iowa will slide off to the southeast tonight. No precipitation and very few clouds will be associated with this system because of very dry air parked over our part of the upper midwest. Weak high pressure will provide us with partly cloudy skies on Wednesday, and it will be a few degrees cooler than Tuesday. A weather system over the southern plains will push moisture northeastward into northern Illinois on Wednesday night increasing clouds overnight, and bringing areas to the west and south of Rockford a chance of light rain before daybreak. It will be colder with a brisk northeast wind on Thursday gusting above 25 mph, and there will be a good chance of light rain across all of northern Illinois as colder air is re-enforced with a backdoor Canadian cold front. The system will be pushed off to the southeast on Friday by chilly Canadian high pressure that will keep temperatures in the 40's all day despite plenty of sunshine. By Saturday the ridge will be off to the east, and a good warm up will set in, but it will be brief as yet another in a series of systems will spin up over Missouri, tap some Gulf moisture, and bring rain to northern Illinois which will mix with some wet snow on Sunday night before ending. Monday will be partly cloudy and chilly with more Canadian air drawn into the midwest behind the departing storm system. A new ridge of high pressure will shift across the area on Tuesday with mostly sunny skies and temperatures recovering into the middle to upper 50's. It looks as if a strong warm front will pass through the upper midwest on Wednesday kicking temperatures into the 70's on Wednesday or Thursday.
By Meteorologist
Eric Nefstead
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