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The Storm Prediction Center (SPC) issues Mesoscale Discussions (MDs or MCDs) that focus on severe thunderstorm potential over the continental U.S. for the next 6 hours with an emphasis on the first 1-3 hours. SPC also issues MDs for mesoscale aspects of hazardous winter weather events including heavy snow, blizzards, and freezing rain. All MDs contain an areas affected line, concerning line, valid time, a paragraph for a summary, and a paragraph for a technical discussion, along with a graphical depiction of the highlighted area.<\/span><\/p>

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Link to graphical web page: <\/span>https://www.spc.noaa.gov/products/md/<\/span><\/a><\/p>

Link to data download (shapefile): <\/span>https://www.spc.noaa.gov/products/md/ActiveMD.kmz<\/span><\/a><\/p>

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Questions/Concerns about the service, please contact the <\/span>DISS GIS<\/span><\/span><\/a> team<\/span><\/p>

Time Information:<\/span><\/p>

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