Day 4-8 Outlook

Day 4-8 Outlook Image

Day 4-8 Convective Outlook  
NWS Storm Prediction Center Norman OK
0346 AM CST Thu Dec 03 2020

Valid 061200Z - 111200Z

A shortwave trough is expected to drop from the northern
Plains/Upper MS Valley into the Mid MS/Lower OH Valley on D4/Sunday,
continuing eastward through the TN Valley and into Mid-Atlantic on
D5/Monday. Upper ridging is anticipated across the central and
eastern CONUS in the wake of this shortwave from D6/Tuesday through
D8/Thursday. As a result, stable conditions are anticipated across
the eastern CONUS for the entire period.

Farther west, an upper low is forecast to develop on D4/Sunday or
D5/Monday across the Great Basin before moving southward off the
southern CA/Baja coast. Some severe could be possible when/if this
low ejects northeastward across Mexico into the southern Plains late
next week. However, the overall evolution of this low remains
uncertain and forecast confidence past D7/Wednesday is low.

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