Day 4-8 Outlook
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0232 AM CST Tue Dec 15 2020 Valid 181200Z - 231200Z ...DISCUSSION... Medium-range models continue to indicate increasing amplification within branching flow, downstream of a persistent strong and zonal mid/upper jet across the western and central, southern mid-latitude Pacific. It appears that this will include building mid-level ridging to the west of the U.S./Canadian Pacific coast by early next week, though downstream short wave developments are more uncertain. Regardless, there currently appears little opportunity for substantive, deep Gulf of Mexico boundary-layer moistening and inland return flow, which is expected to contribute to the maintenance of generally low convective potential through the period.
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