Clouds filled our skies Tuesday afternoon but that didn't stop temperatures from reaching the upper 60s in northern Illinois. When you look at radar you will notice a little green showing up indicating some precipitation moving through the region but given our dry atmosphere not much - if any - of that is actually reaching the ground. This means that we'll just continue to see mostly cloudy skies for the remainder of the evening.
These clouds have been the result of a weak low-pressure system (upper-level disturbance, really) moving through the Midwest. It's pulled in a little more moisture which has led to the increase in cloud cover. But late tonight that low will move out which will help clear our skies into the overnight and bring temperatures down into the mid-40s once again. There may even be some patchy fog early Wednesday.
Clouds, however, will fill back in with another cold front that'll move into the western Great Lakes late Wednesday night. With a little instability building along the front there may be an isolated rumble of thunder or two during the early morning hours of Thursday. Temperatures won't fall much Wednesday night, which means it'll be a warm start to the day. But with the cold front coming through during the morning highs likely won't climb much into the afternoon and remain capped right around 69/70 degrees. Still above average, however.
Heading into Friday we will once again see an increase in cloud cover during the afternoon. That combined with an easterly wind will help hold afternoon highs in the low to mid 60s, which is still above average. Temperatures for both Friday and Saturday (Halloween) continue to trend down some with it looking like we may see a little more cloud cover during the afternoon, unfortunately. There could also be a few showers around during the first half of the day Saturday, but hopefully by Saturday evening things will be drying out.
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