SPC 1300Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0641 AM CST Mon Nov 10 2025 Valid 101300Z - 111200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected today or tonight across the U.S. ...Synopsis... Deep upper troughing currently covers much of the central and eastern CONUS, with upper ridging across the western CONUS. The upper troughing is forecast to spread eastward throughout the day while trending towards a more negative tilt. The western CONUS ridging is expected to dampen as a shortwave trough progresses through its northern periphery along the western US/Canada border and into the northern High Plains/northern Plains. This evolution will result in a less amplified upper pattern characterized by northwesterly flow aloft by early Tuesday morning. Surface pattern will be dominated by dry and stable high pressure associated with a continental airmass. This will preclude thunderstorms across the majority of the CONUS. The only exceptions are across far south FL, and from far eastern MA into eastern ME. Far south FL remains ahead of the cold front and could see isolated thunderstorms this morning. Warm-air advection near a surface low expected to track across far eastern MA through eastern ME could also support a few deeper convective cores capable of lightning. ..Mosier/Squitieri.. 11/10/2025
