Sunday, July 23, 2017

Brief Break from the Humidity - Returns by the Middle of the Week

Dew point temperatures have been slow to come down Sunday afternoon.  The high moisture and incoming cold front prompted a few thunderstorms, some of which turned severe, to develop Sunday afternoon and early evening.  Most of those storms have now moved out of the immediate area, with skies remaining partly to mostly cloudy through the evening.

Drier air (lower dew points) will follow the front late Sunday night and throughout the day on Monday.  This will help wipe out the high humidity that we've had for the past week.  Unfortunately the break doesn't last too long, because an incoming cold front will shift winds back around to the south late Tuesday night.  This will help draw in quite a bit of moisture into the Midwest during the day on Wednesday and Thursday.

An incoming cold front Wednesday afternoon will likely trigger strong to severe thunderstorms over parts of Minnesota, Wisconsin and northern Iowa.  As the cold front sinks south, the threat for thunderstorms will shift south as well.  The set-up in the atmosphere does not support the repeated rounds of heavy rainfall like we just experienced, however, the high moisture in the atmosphere will support the possibility of thunderstorms to produce quick heavy downpours. 

The good news is the storms will be out by Thursday with drier days leading into the weekend.  The only two days this week with a 'Moderate' Weatherisk are Wednesday and Thursday.  Every other day we've got a 'green' light.

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