A very active weather pattern this week

Thunderstorms developing along a warm front will continue to drift northeast Monday morning but this won't be the only threat for rain/storms this week. 

High pressure in the southeast will keep the jet stream winds almost over top Iowa, Illinois and Wisconsin for the next few days.  A warm front draped directly over northern Illinois this morning has been the focus for thunderstorm development with the leading edge of the storms moving into northwest Illinois.  Storms will continue to move northeast through early afternoon with a few lingering showers lasting into the evening.  Once the warm front moves into Wisconsin later today the threat for rainfall or storms will decrease.  You can see the greatest chance for storm activity will be this morning and afternoon with only a slight or isolated threat developing Tuesday and Wednesday.  The reason for this is with the warm front north of the area there will be no real trigger mechanism for storm development.  That is not until Thursday when a cold front comes through.

Not only will temperatures rise behind the front the next few days but the moisture will increase as well.  Already if you were to step outside you would notice a cool, but damp feeling with the humidity creeping up.  Dew points will rise into the upper 50s/low 60s the next few days which will keep overnight lows very mild but also allow for haze and fog to form.  For late October standards it will feel fairly humid these next several days. 

Rainfall amounts won't be in short supply either; especially with what's coming through Monday morning.  Rainfall totals through the middle of the week could near an inch or so for northern Illinois and southern Wisconsin.  Definitely some much needed rainfall coming these next few days.