SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1122 PM CST Thu Jan 02 2025 Valid 031200Z - 041200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Sporadic lightning flashes may occur this afternoon and evening over the coastal Pacific Northwest into interior northern California. Severe weather is not expected. ...Pacific Northwest... Upper ridge will shift east into the Rockies later this afternoon as a strong trough advances inland along the Pacific northwest. Latest guidance suggests 120-150m, 12hr height falls will overspread this region, coincident with highly diffluent flow aloft. Very cold mid-level temperatures, and cooling/steepening lapse rates favor an increasingly buoyant profile by afternoon within the post-frontal environment. Scattered convection should develop within this environment, and the strongest updrafts may penetrate levels necessary for lightning discharge, hence the continuation of thunder probabilities. ..Darrow/Wendt.. 01/03/2025
