Day 4-8 Outlook
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0248 AM CST Sun Dec 07 2025 Valid 101200Z - 151200Z ...DISCUSSION... After becoming suppressed a bit, medium-range guidance indicates that a blocking high may become more prominent again, near/north of the Aleutians late this coming work week into next weekend. Surrounding developments across the mid- and higher latitudes of the Pacific do become characterized by increasing spread. However, it is not yet clear how much impact this will have on downstream flow across North America. It still appears that an increasingly confluent northwesterly mid-level regime, between persistent ridging across the eastern Pacific into western North America and downstream troughing, may support the development of another expansive surface ridge east of the Rockies into the Gulf Basin and Atlantic Seaboard late this week through next weekend. This is likely to further impede deep boundary-layer moistening over the northwestern Gulf. Coupled with the lack of a developing southerly return flow from the Gulf Basin until at least early next week, it appears that generally stable conditions will be maintained through this period.
