Administrators NorthGeorgiaWX Posted October 1 Administrators Share Posted October 1 SPC 1200Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1155 PM CDT Mon Sep 30 2024 Valid 011200Z - 021200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected today. ...Synopsis and Discussion... An upper ridge will extend from CA across the Four Corners region and into the southern Plains today, as multiple strong troughs develop across Canada. One such lead trough will affect parts of the upper MS Valley and Great Lakes, eventually weakening the upper ridge over the Northeast. Behind this feature, a broad belt of strong westerlies will develop across the Canadian Rockies, sinking south across the US/CN border late. At the surface, high pressure will affect much of the intermountain West and Plains, with falling pressures across MT during the late afternoon. This developing surface trough will move into the Dakotas overnight, but will remain free of thunderstorms due to dry air. Dry air behind a cold front associated with the aforementioned surface high will push east across the Midwest and toward the lower MS Valley late, further stabilizing the air mass. Strong ascent moving across Lower MI and toward the lower Great Lakes may be sufficient for a few thunderstorms along the cold front, despite limited instability. Otherwise, the most favorable environment for general thunderstorms will be from FL into the eastern Carolinas where upper 60s F to 70s F dewpoints will remain. Shear will weaken over the Southeast throughout the day, but daytime heating as well as areas of weak surface convergence may support scattered thunderstorms over the interior FL Peninsula and near the coastal Carolinas. ..Jewell/Bentley.. 10/01/2024 Read more View the full article Quote Link to comment Share on other sites More sharing options...
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