514
ACUS48 KWNS 060907
SWOD48
SPC AC 060905

Day 4-8 Convective Outlook
NWS Storm Prediction Center Norman OK
0305 AM CST Sat Dec 06 2025

Valid 091200Z - 141200Z

...DISCUSSION...
Downstream of an increasingly prominent blocking high evolving near
and to the north of the Aleutians, it appears that the large-scale
mid/upper flow pattern may not appreciably change, aside from
perhaps some amplification, across North America into next weekend.
Models indicate that large-scale mid/upper ridging will generally be
maintained across the Pacific Coast through Rockies, with downstream
troughing across the Mississippi Valley into western Atlantic.

Short wave developments within this regime are forecast to lead to
another notable intrusion of cold/dry air to the lee of the Rockies,
through much of the Southeast and Gulf Basin, late this coming week
into next weekend.  It appears that this will occur before Gulf
boundary-layer modification, in the wake of the prior cold/dry
intrusion, can become potentially supportive of a substantive moist
return flow.

..Kerr.. 12/06/2025