Return of the heat

Temperatures this weekend weren't too terrible; 90° on Saturday and 85° Sunday.  That's all about to change for the next few days this week as a building ridge of high pressure  pulls heat and humidity northward.

A complex of thunderstorms early this morning moved across Wisconsin and Michigan.  Cloud cover from those storms were with us overnight but have quickly faded into mostly sunny skies early this morning.  Winds within the jetstream are quickly moving from west to east across the northern tier of the country but will soon shift a little further north into Canada.  This will allow some of the heat that has been building across the Plains and Southwestern states to move into the Midwest this afternoon.  While 90° temperatures have been reached this season already, today we'll add the humidity with dew points readings in the middle 60s.  Those two things combined will cause heat index values to reach the upper 90s. 

Storms for the next couple of days will generally move from southwest to northeast as they follow the winds within the jetstream.  It won't be until late Wednesday afternoon when the blocking ridge of high pressure in the Ohio River Valley breaks down to allow the jetstream to shift a little further south.  A cold front will move through Wednesday bringing temperatures back to normal; in the low 80s.

We'll rise close to record high temperatures today and possibly tomorrow, but I think the current records will remain:
Forecast high today: 96°  (Record High: 99°)
Forecast high tomorrow: 94°  (Record High: 99°)
Forecast high Wednesday: 92°  (Record High: 101°)