Day 4-8 Outlook
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0348 AM CST Tue Dec 22 2020 Valid 251200Z - 301200Z ...DISCUSSION... Medium-range guidance is in good agreement that a deep upper trough will cover the eastern CONUS early D4/Friday. Surface low associated with this trough will likely be over Ontario, with its attendant cold front likely offshore. This system will continue eastward/northeastward off the East Coast on D4/Friday. Another shortwave will likely progress through southern Plains on D5/Saturday, with another shortwave in its wake over the central/southern Plains on D6/Sunday. Despite this active and progressive upper pattern, stable conditions are anticipated in the wake of the eastern CONUS upper trough and the short duration between all the shortwaves will limit moisture return. As such, severe potential appears low through at least early next week.
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