SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1116 PM CST Sun Feb 16 2025 Valid 171200Z - 181200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... No areas of thunderstorm activity are forecast across the CONUS today. ...Discussion... A trough will depart the eastern US today, with zonal flow temporarily settling in across the CONUS. At the surface, a cold front will be moving southward across the Florida peninsula early in the period. A storm or two may linger into the early D1 period along the departing front, however, coverage will remain sparse before quickly moving into the coastal waters. Flow will begin to modify Monday afternoon/evening, as a belt of enhanced upper level flow ejects and a trough deepens across the Pacific Northwest into the Great Basin. Breezy westerly flow will remain across the southern Rockies, promoting lee troughing and surface cyclone development across the central High Plains with moisture return beginning across the far southern Plains. Diurnally driven shower activity will be possible across the Pacific Northwest into the central/northern Rockies in association with the deepening trough. A lightning strike or two cannot be ruled out in this region, but coverage will remain below 10 percent for inclusion of thunder areas. ..Thornton.. 02/17/2025