Subj : DAY3SVR: Nws Storm Prediction Center Norman Ok To : wx-storm@lists.illinois.edu From : COD Weather Processor Date : Thu Aug 08 2024 07:30:17 ACUS03 KWNS 080730 SWODY3 SPC AC 080729 Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0229 AM CDT Thu Aug 08 2024 Valid 101200Z - 111200Z ....NO SEVERE THUNDERSTORM AREAS FORECAST... ....SUMMARY... The risk for severe thunderstorms appears negligible across the U.S. Saturday through Saturday night. ....New England... Models are varied in depiction of surface cyclogenesis east-northeast of the Great Lakes region into the upper St. Lawrence Valley through 12Z Saturday, and the merging of Debby's remnant low into this cyclonic regime. However, in general, it appears that one initial occluding cyclone may continue to weaken across western Quebec during the day Saturday, while another area of consolidating low pressure continues to deepen east-northeastward through the remainder of the St. Lawrence Valley and the Gulf of St. Lawrence by Saturday night. Regardless, most guidance indicates that the belt of seasonably strong southerly lower/mid-tropospheric flow and convective development associated with this regime will shift into the Canadian Maritimes early in the period, prior to any potential for appreciable boundary-layer destabilization. ....Elsewhere... Generally beneath mid-level ridging across the southern mid- and subtropical latitudes, while a plume of moisture emanating from the lower latitudes appears likely to shift east of the Atlantic Seaboard during this period, lingering boundary-layer moisture ahead of a surface cold front advancing toward the south Atlantic coast may support moderately large CAPE with daytime heating. This might be accompanied by widely scattered strong thunderstorm development Saturday afternoon. More widespread, but generally weaker, elevated thunderstorm development appears probable above the western flank of the front, across the Great Plains to the east of the southern Rockies, aided by forcing associated with low-level warm advection Saturday through Saturday night. A low-amplitude wave migrating around the periphery of the ridging may also contribute to widely scattered strong thunderstorm development, where boundary-layer instability becomes diurnally maximized across the eastern Great Basin into the Rockies late Saturday afternoon and evening. Although in each of these areas a few of the strongest storms could pose some risk for severe wind and/or hail, this still seems likely to remain sparse enough in coverage to maintain severe probabilities at less than 5 percent. However, it is possible that this could still change in later outlooks for this period. ...Kerr.. 08/08/2024 $$ = = = To unsubscribe from WX-STORM and you already have a login, go to https://lists.illinois.edu and use the "Unsubscribe" link. Otherwise email Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM. --- SBBSecho 3.20-Linux * Origin: capitolcityonline.net * Telnet/SSH:2022/HTTP (1:2320/105) .