Widspread frost developed early Wednesday morning as temperatures fell into the 20s for most. But under sun-filled skies afternoon readings have warmed into the low to 50s, still a bit below the average high of 62 degrees.
Temperatures will once again fall into the upper 20s and low 30s with widespread frost expected into Thursday morning. A Freeze Warning has been issued for Winnebago, Boone, Ogle, Lee, and DeKalb counties beginning late Wednesday night, lasting through Thursday morning. Sunshine will continue to fill the skies through the end of the week as high pressure sits to our south and east.
This will allow surface winds to turn more to the southwest bringing temperatures into the 60s both Thursday and Friday. Wind speeds, however, will increase with a tightening pressure gradient to the west allowing winds to gust as high as 25 mph during the afternoon. The gusty southwest winds could lead to an elevated field fire risk for some, especially over northwest Illinois. Those breezy southwest winds will continue into Friday. Dry conditions can still be expected straight through the weekend.
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