Day 4-8 Outlook

Day 4-8 Outlook Image

Day 4-8 Convective Outlook  
NWS Storm Prediction Center Norman OK
0303 AM CST Sat Dec 12 2020

Valid 151200Z - 201200Z

Medium-range model output suggests that initially northwest flow
across much of Canada will transition to a more zonal regime, while
a belt of westerlies emanating from the mid-latitude Pacific remains
a prominent influence across much of the U.S. through the middle and
latter portions of next week.  As this occurs, it appears that an
initially amplified trough to the lee of the southern Rockies will
lose amplitude, with the most significant embedded perturbation
accelerating toward the Mid Atlantic, where it may support
significant surface cyclogenesis offshore Wednesday into Thursday. 
An additional perturbation or two may follow within this stream,
inland across the Pacific coast and through the U.S. by early next
weekend.  However, models indicate little in the way of substantive
surface cyclogenesis and inland return flow of moisture off the Gulf
of Mexico, resulting in the maintenance of generally stable
conditions and low convective potential.

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