SPC 0730Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0218 AM CDT Sun Sep 10 2023 Valid 121200Z - 131200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Organized severe thunderstorms are not forecast across the contiguous United States on Tuesday. ...Synopsis... A mid-level trough over the Great Lakes is forecast to evolve into a closed low. A mid-level ridge over MT and the western Dakotas will shift east as an upstream trough moves into the Pacific Northwest. A low-amplitude westerly mid-level flow regime will extend across the southern tier of states north of a flattened mid-level anticyclone. In the low levels, a surface low will migrate slowly northeast from the Great Lakes into southeastern Canada. A trailing cold front will push southeast across the Lower Great Lakes and the southwestern portion of the boundary will become draped west to east across the southern Great Plains. Showers and isolated to scattered thunderstorms are forecast near the boundary and in the vicinity of a lee trough in the Mid-Atlantic states. The dislocation of appreciable buoyancy and moderately strong shear will seemingly preclude vigorous storm development across the CONUS on Tuesday. ..Smith.. 09/10/2023
