BBS: TELESC.NET.BR Assunto: DAY48SVR: Nws Storm Prediction Center Norman Ok De: COD Weather Processor Data: Sat, 30 May 2026 08:44:14 +0000 ----------------------------------------------------------- ACUS48 KWNS 300844 SWOD48 SPC AC 300842 Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0342 AM CDT Sat May 30 2026 Valid 021200Z - 071200Z ...DISCUSSION... ...Tuesday/Day 4 to Thursday/Day 6... At mid-levels, a ridge is forecast to move slowly eastward from the upper Mississippi Valley on Tuesday to the northeastern U.S. by Thursday. During that time, a shortwave trough is forecast to move slowly eastward across the north-central U.S. Isolated severe thunderstorms will be possible ahead of the trough each afternoon and evening. The greatest severe threat is currently expected in the Dakotas on Tuesday and Wednesday, and in the upper Mississippi Valley on Thursday. Regarding the spatial extent of any severe threat, some uncertainty exists concerning the timing of the trough and the location of maximum instability. ...Friday/Day 7 and Saturday/Day 8... Multiple shortwave troughs are forecast to move across the central U.S. on Friday and Saturday. During this time, moisture and instability is forecast to be maximized in the Great Plains. As surface temperatures heat up each day, thunderstorm development and potentially an isolated severe threat will be possible across a relatively broad moist sector. Concerning predictability, the convoluted pattern introduces considerable uncertainty as to where the greatest severe threat will be. ..Broyles.. 05/30/2026 = = = 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]