The thunderstorm forecast is issued daily from March 1 to September 30.
Monday, June 21st:
Isolated-severe thunderstorms are possible in numerous areas of the U.S. today. Due to an area of low pressure in these area(s), these storms will be in an area with enough instability to create supercells, and potentially a few Tornadoes. Large hail, isolated heavy downpours, and damaging wind gusts are likely with these discrete and/or semi-discrete thunderstorms.
Non-severe thunderstorms are also expected today in numerous areas of the U.S. Small hail, wind gusts up to 55 mph, and isolated flooding may occur with these storms.