BBS: TELESC.NET.BR Assunto: DAY48SVR: Nws Storm Prediction Center Norman Ok De: COD Weather Processor Data: Mon, 23 Mar 2026 09:01:03 +0000 ----------------------------------------------------------- ACUS48 KWNS 230900 SWOD48 SPC AC 230859 Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0359 AM CDT Mon Mar 23 2026 Valid 261200Z - 311200Z ...DISCUSSION... ...Thursday/Day 4 and Friday/Day 5... Strong westerly mid-level flow will be in place across much of the central and eastern U.S. on Thursday. At low-levels, moisture advection is forecast to strengthen during the day from the mid Mississippi Valley into the lower Ohio Valley as surface dewpoints gradually increase into the lower to mid 60s F. A cold front is forecast to advance southeastward into the southern Great Lakes by Thursday afternoon, with scattered to numerous thunderstorms developing along and near the front. Moderate instability should develop to the south of the front, which combined with strong deep-layer shear will likely support a severe threat during the afternoon and evening. The greatest threat is expected to be from northeast Missouri east-northeastward into western and northern Ohio, where a threat area has been added for Thursday. On Friday, a mid-level trough is forecast to dig southeastward into the mid Mississippi Valley, as a front moves southeastward into the Tennessee Valley and southern Appalachians. Although isolated to scattered thunderstorms will be possible near the front during the afternoon and evening, model forecasts suggest that instability will remain relatively weak. This should keep any severe threat minimal. ...Saturday/Day 6 to Monday/Day 8... The cold front is forecast to move southward through the Southeast on Saturday and should remain near the Gulf Coast on Sunday. In its wake, a relatively dry airmass is forecast to be in place over much of the nation, making thunderstorm development unlikely in most areas. On Monday, some model forecasts suggest that a mid-level shortwave trough will move into the southern Plains. Low-level moisture could return northward into the southern Plains Monday into Monday night. If this where to occur, then thunderstorm activity would be mostly likely Monday night as a low-level jet develops. However, this scenario is highly uncertain due to the extended range in the forecast period. ..Broyles.. 03/23/2026 = = = 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]