SPC 1930Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0107 PM CST Sun Dec 14 2025 Valid 161200Z - 171200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... A few lightning flashes may occur over parts of the Pacific Northwest on Tuesday/Tuesday evening, with isolated thunderstorms also possible over the Texas Coast Plain early Wednesday morning. ...Synopsis... A series of mid-level troughs will progress across the northern CONUS on Tuesday, resulting in pronounced surface troughs becoming established across the Pacific Northwest and the central CONUS. Cooler temperatures aloft will overspread the northern OR and WA coastline, resulting in scant buoyancy amid deep-layer ascent to support a few lightning flashes during the day Tuesday. A warm-air advection regime should develop along the western Gulf Coast in response to the glancing mid-level trough to the north, resulting in the onset of moisture return. Elevated buoyancy should develop within the warm-air advection regime after 06Z Wednesday morning, which may support isolated thunderstorm development across the TX Coastal Plain. ..Squitieri.. 12/14/2025
