Monday, August 27, 2018

Severe Thunderstorms Remain North Monday Night - Move Closer Tuesday Night

Severe thunderstorms have been ongoing over Minnesota and Wisconsin Monday evening with numerous severe thunderstorm warnings, and even a couple tornado warnings.  Southerly winds in the atmosphere will keep the storm threat north of the state line, with only a small chance for storms clipping parts of northern/northeast Illinois by Tuesday morning.

Severe storms will continue to move east into central and northern Wisconsin Monday night, posing a wind and heavy rain threat.  Closer to the Stateline strong southerly winds will keep temperatures in the mid 70's overnight with partly cloudy skies.

A cold front moving in from the northwest Tuesday afternoon will allow thunderstorms to once again develop over Wisconsin.  The high moisture in the air will cause instability to build quite a bit during the afternoon Tuesday.  Temperatures will warm into the mid 80's, but the heat index will be pushing could be pushing the mid and upper 90's.

Outside of a small storm chance Tuesday
morning, most of the early afternoon is looking to be dry.  By late afternoon, after 4pm, storms will be possible stretching from Wisconsin down into Iowa.  A line of thunderstorms will then develop along and ahead of the advancing cold front, pushing into southern Wisconsin and northern Illinois between 7pm and Midnight.  Damaging wind gusts will be our primary concern, followed by very heavy rainfall.  Rainfall totals could add up to two inches in some locations through Wednesday morning.

The Storm Prediction Center has placed southern Wisconsin and northern Illinois under a Slight Risk for strong to severe storms for the afternoon and evening Tuesday. 

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