BBS: TELESC.NET.BR Assunto: DAY3SVR: Nws Storm Prediction Center Norman Ok De: COD Weather Processor Data: Fri, 1 May 2026 19:26:56 +0000 ----------------------------------------------------------- ACUS03 KWNS 011926 SWODY3 SPC AC 011925 Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0225 PM CDT Fri May 01 2026 Valid 031200Z - 041200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS PARTS OF THE MID-MISSOURI AND MID-MISSISSIPPI VALLEYS... ...SUMMARY... A few strong thunderstorms are possible across parts of northern/central Missouri and central Illinois on Sunday. ...Synopsis... Broad cyclonic flow aloft across much of the central/eastern CONUS will continue on Sunday. Within the broader cyclone, shortwave troughs will rotate into the northern Plains and lower Missouri/mid-Mississippi Valleys. A surface high will continue to shift southeastward allowing some southerly return flow into the southern Plains/Mid-South into parts of Missouri/Illinois. As the northern Plains trough intensifies, a weak surface boundary will move southeastward into the Midwest. ...Lower Missouri/Mid-Mississippi Valleys... Moisture return ahead of the weak surface front is not expected to be significant. The initial return flow pattern may allow low 50s F dewpoints to reach parts of Missouri/Illinois. Despite the limited moisture, temperatures aloft will be quite cold (nearing -20 C at 500 mb). At least a narrow zone of 1000-2000 J/kg MLCAPE appears possible. Storm coverage may remain isolated, but there is reasonable confidence in development given surface convergence and aid from a passing shortwave trough by late afternoon. Where storms can develop, 40-50 kt of effective shear, a well-mixed boundary layer, and the steep mid-level lapse rates would support a risk for large hail and severe wind gusts. The most notable change with this outlook is to shift probabilities southward given the latest guidance trends. ..Wendt.. 05/01/2026 $$ = = = 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 3.28-Linux * Origin: Capitol City Online (1:2320/107) ----------------------------------------------------------- [Voltar]