Monday, May 30, 2011

Heat expands here...strong storms in the Upper Midwest

As a ridge of high pressure builds in the southeast today strong southerly winds will help push temperatures near records across parts of the Midwest and lower Great Lakes.  While we likely won't see any record breaking heat here, our record high for today is 96° set back in 1934, the lower 90s will be felt across the Stateline.  The ridge will act as a bubble keeping the bulk of storm activity to the west and northwest through this afternoon.  With a breezy southerly wind and dew points in the low 60s, it's possible that heat index readings may approach the middle 90s by this afternoon.  So if you're planning on heading out today to any parades or other events make sure you wear the sunscreen and drink plenty of water.

Unfortunately, severe weather is going to be a problem for residents in the eastern Plains and upper Midwest later this afternoon.  Ongoing storms through Minnesota this morning continue to move into northern Wisconsin as the warm air lifts north.  As those storms move out, the atmosphere will likely destabilize again as an area of low pressure and associated cold front lift northeast out of the Rockies.  This area will be the focus for stronger storms, some of which could produce tornadoes, later this afternoon.  A moderate risk has been placed from north-central Nebraska northward along the North Dakota/Minnesota border.  That system will stay north of us tomorrow, but the trailing cold front will move through during the afternoon and evening which could provide a few stronger storms; especially if our cap (lid on the atmosphere) weakens.  We do have a slight risk out for this area.

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