SPC 0830Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0114 AM CST Sun Dec 07 2025 Valid 091200Z - 101200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for thunderstorms appears negligible across the U.S. Tuesday through Tuesday night. ...Discussion... Models continue to indicate little substantive change to the large-scale mid/upper flow impacting the U.S. through this period. Broad ridging is likely to persist across the eastern mid-latitude Pacific into the U.S. Intermountain West and Rockies, with downstream troughing east of the Rockies through the Atlantic Seaboard and western Atlantic. The troughing is likely to be reinforced by another significant short wave perturbation, digging within northwesterly flow to the lee of the crest of the ridge. It appears that this will be accompanied by a rapidly migrating cyclone across the northern Great Plains through much of the upper Great Lakes region by late tonight. In the wake of this feature, models indicate an increasingly significant intrusion of cold air will begin to surge southward into parts of the northern Great Plains and upper Mississippi Valley, preceded by strengthening flow veering to an increasing westerly component as far south as the Gulf coast vicinity. Even as the Gulf boundary layer begins to modify to the north of a stalling and weakening front, south of the Florida Peninsula through the southern Gulf Basin, appreciable inland moisture is unlikely through this period and beyond. ..Kerr.. 12/07/2025
