Monday almanac: Temps below normal with gusty winds

NOTE: This article is now an almanac of Monday’s weather. We have published a new forecast story for Tuesday.

Highs were noticeably cooler Monday in the wake of the low 80s on Sunday afternoon prior to the arrival of mid-afternoon thunderstorms.

Peak readings were in the low 70s, a level nearly 10 degrees below normal.

The cooler temperatures were accompanied by a gusty westerly wind that passed 30 mph at times while we enjoyed nearly 70% of the day’s potential sunshine.

Snapshot of mid to late afternoon temperatures and how much different they were than the same time on Sunday.  

Monday departure map indicates that much of the Upper Midwest logged highs well below normal for early June.     

Sunday isolated severe thunderstorm recap

A severe thunderstorm on Sunday produced golf ball to even tennis ball size hail and 80 mph winds in Kane County’s Batavia leading to a substantial amount of damage.

The storm that produced the damage was a supercell, meaning the updraft was rotating. As it moved over Kane County, a massive “core” developed which was a mass of heavy rain and hail, about 10,000 to 15,000 feet above the ground. A severe thunderstorm warning was issued for Kane County. As the core grew larger, it became too heavy to stay suspended in the storm and came crashing down directly over Batavia. Again, this storm was highly localized but still a very destructive storm.