SPC 1930Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0224 PM CDT Fri Oct 02 2026 Valid 041200Z - 051200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe storms are not forecast for Sunday. ...Synopsis... A deep midlevel trough will move from the Great Lakes to New England, as upstream ridging persists from the Four Corners into the Great Basin. A previously stalled front will be reinforced and will begin to move southeastward across the southern states, in the wake of the Great Lakes midlevel trough. A moisture plume will persist along and ahead of the front, with sufficient buoyancy for embedded thunderstorms along and ahead of the front, in an environment with weak vertical shear. Elsewhere, isolated/diurnal convection with a few lightning flashes will be possible over the high terrain of southwest CO. Farther west, a weak midlevel trough over the eastern Pacific will approach northern CA/OR by late Sunday. There is low potential for enough moistening/ascent to support isolated lightning flashes. However, the threat appears sufficiently low to preclude adding a thunderstorm area for CA/OR in this update. ..Thompson.. 10/02/2026 Read more

SPC 1930Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0224 PM CDT Fri Oct 02 2026 Valid 041200Z - 051200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe storms are not forecast for Sunday. ...Synopsis... A deep midlevel trough will move from the Great Lakes to New England, as upstream ridging persists from the Four Corners into the Great Basin. A previously stalled front will be reinforced and will begin to move southeastward across the southern states, in the wake of the Great Lakes midlevel trough. A moisture plume will persist along and ahead of the front, with sufficient buoyancy for embedded thunderstorms along and ahead of the front, in an environment with weak vertical shear. Elsewhere, isolated/diurnal convection with a few lightning flashes will be possible over the high terrain of southwest CO. Farther west, a weak midlevel trough over the eastern Pacific will approach northern CA/OR by late Sunday. There is low potential for enough moistening/ascent to support isolated lightning flashes. However, the threat appears sufficiently low to preclude adding a thunderstorm area for CA/OR in this update. ..Thompson.. 10/02/2026 Read more

SPC 1930Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0224 PM CDT Fri Oct 02 2026 Valid 041200Z - 051200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe storms are not forecast for Sunday. ...Synopsis... A deep midlevel trough will move from the Great Lakes to New England, as upstream ridging persists from the Four Corners into the Great Basin. A previously stalled front will be reinforced and will begin to move southeastward across the southern states, in the wake of the Great Lakes midlevel trough. A moisture plume will persist along and ahead of the front, with sufficient buoyancy for embedded thunderstorms along and ahead of the front, in an environment with weak vertical shear. Elsewhere, isolated/diurnal convection with a few lightning flashes will be possible over the high terrain of southwest CO. Farther west, a weak midlevel trough over the eastern Pacific will approach northern CA/OR by late Sunday. There is low potential for enough moistening/ascent to support isolated lightning flashes. However, the threat appears sufficiently low to preclude adding a thunderstorm area for CA/OR in this update. ..Thompson.. 10/02/2026 Read more

SPC 1930Z Day 3 Outlook Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0224 PM CDT Fri Oct 02 2026 Valid 041200Z - 051200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe storms are not forecast for Sunday. ...Synopsis... A deep midlevel trough will move from the Great Lakes to New England, as upstream ridging persists from the Four Corners into the Great Basin. A previously stalled front will be reinforced and will begin to move southeastward across the southern states, in the wake of the Great Lakes midlevel trough. A moisture plume will persist along and ahead of the front, with sufficient buoyancy for embedded thunderstorms along and ahead of the front, in an environment with weak vertical shear. Elsewhere, isolated/diurnal convection with a few lightning flashes will be possible over the high terrain of southwest CO. Farther west, a weak midlevel trough over the eastern Pacific will approach northern CA/OR by late Sunday. There is low potential for enough moistening/ascent to support isolated lightning flashes. However, the threat appears sufficiently low to preclude adding a thunderstorm area for CA/OR in this update. ..Thompson.. 10/02/2026 Read more

SPC 1730Z Day 2 Outlook Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1224 PM CDT Fri Oct 02 2026 Valid 031200Z - 041200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... No severe thunderstorms are expected across the U.S. on Saturday. ...Synopsis... A midlevel trough now over WA will progress eastward across the upper MS Valley tomorrow, accompanied by a surface cold front. Conditionally unstable midlevel lapse rates, in combination with sufficient midlevel moistening in the zone of ascent preceding the midlevel trough, will support the potential for elevated thunderstorms across the upper MS Valley. Elsewhere, a slow-moving front will extend from the Carolinas to the northwest Gulf and provide a focus for thunderstorm development. Severe storms are not expected as a result of deep, moist profiles and weak vertical shear. ..Thompson.. 10/02/2026 Read more