Day 4-8 Outlook

Day 4-8 Outlook Image

Day 4-8 Convective Outlook  
NWS Storm Prediction Center Norman OK
0308 AM CST Mon Feb 08 2021

Valid 111200Z - 161200Z

A progressive upper pattern is forecast during the Day 4-8 period,
with a series of troughs migrating across the CONUS. The first upper
trough in this series will spread eastward across the Plains and
toward the Atlantic coast on Day 4/Thu. At the surface, an arctic
air mass will percolate south and east behind a cold front,
extending from the coastal Carolinas to the central Gulf coast
vicinity by Day 5/Fri morning. Thunderstorm potential will exist
across parts of the Southeast in the vicinity of the front on
Thursday and Friday, though most of this activity is expected to
remain elevated/to the cool side of the boundary, limiting severe
potential in the absence of stronger surface cyclogenesis.

Strong surface high pressure will continue to build south/southeast
across the Plains and Midwest, as a second upper trough digs across
the western states and shifts eastward over the Plains and Midwest
during the weekend. This will reinforce a bitterly cold air mass
across much of the U.S. through the end of the period, precluding
severe thunderstorm potential.

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