National Weather Service United States Department of Commerce

Dangerous Heat in the East; Critical Fire Weather in the Southwest

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Heat is likely to continue across the eastern U.S. through the Independence Day holiday weekend. Critical fire weather conditions will continue today and likely Tuesday across portions of the Four Corners and northern High Plains. Read More >

A Spring Snowstorm For The Record Books

 

On May 10, 1990, eastern Wisconsin experienced its latest snowstorm on record.  The snow was very wet and heavy, and unfortunately it occurred when most trees and other plants had just leafed out for the new season.  As a result, thousands of trees and tree branches came down under the weight of the heavy snow.  Many power-lines snapped as the trees/branches came down.

Below is a rough plot of the snow amounts along with a 6-inch contour line. 

Below is a Storm Data event narrative for the snowstorm.  Click on the image for a larger version. 

For the meteorology wonks out there...

Below are maps at 850/700/500mb at 7 PM May 9th, 1 AM May 10th and 7 AM May 10th. Clearly, this was an energetic system that was deepening rapidly.  We have a saying in the office, "Upper low, look out below."

 

  7 PM May 9th 1 AM May 10th 7AM May 10th
Surface Pressure
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Here's the 1000mb-500mb Thicknesses at 7 am May 10th.  A cold system for sure.


Davis