May 21, 2013
Thunderstorms Are Unlikely Day 3...Continuing The Trend That Cool
Continental Air Persisting Across The U.S. Will Preclude Presence Of
Airmass Instability.
A Clipper-Type System Will Move Across The Great Lakes Region Into Ern Canada And The Nern Conus...While A Reinforcing Shot Of Cold Air Shifts Swd Across The Central U.S. In Its Wake -- With Large-Scale Cyclonic Flow Aloft To Persist Through The Period.
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