BBS: TELESC.NET.BR Assunto: DAY1SVR: Day 1 Convective Outlook De: COD Weather Processor Data: Wed, 27 May 2026 05:55:53 +0000 ----------------------------------------------------------- ACUS01 KWNS 270555 SWODY1 SPC AC 270554 Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1254 AM CDT Wed May 27 2026 Valid 271200Z - 281200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE MID-ATLANTIC... ...SUMMARY... Thunderstorms with severe wind gusts will be possible today across parts of the Mid-Atlantic and Ohio Valley. Isolated wind gusts and hail will also be possible in the western Great Lakes and from the southern Texas Panhandle into west Texas and far western Oklahoma. ...Mid-Atlantic/Ohio Valley... An upper-level trough will move southeastward today across the Great Lakes. Flow ahead of the trough will be westerly over the Ohio Valley and Mid-Atlantic. At the surface, a cold front will move southward into the Ohio Valley. South of the front, dewpoints in the 60s F will contribute to pockets of moderate instability by afternoon. As low-level convergence and instability maximizes near the front, thunderstorms are expected to form and move east-southeastward across the Ohio Valley and Mid-Atlantic. RAP forecast soundings just ahead of the front in northern Virginia at 21Z have MLCAPE near 1200 J/kg with 0-6 km shear around 40 knots. This will support organized thunderstorms, potentially in the form of multiple short severe line segments. During the mid to late afternoon, low-level lapse rates are forecast to peak near 7.5 C/km, which will be favorable for a wind-damage threat. Hail will also be possible within the stronger cores. ...Western Great Lakes... Northwesterly mid-level flow will be in place across the western Great Lakes today, as a shortwave trough moves southeastward across the region. At the surface, a pocket of maximized low-level moisture will be located over Wisconsin, where MLCAPE is expected to peak in the 1500 to 2500 J/kg range. Thunderstorms that form during the afternoon that have access to moderate instability and steep low-level lapse rates could have potential for isolated wind gusts. Hail could also occur. ...Southern Texas Panhandle/West Texas/Far Western Oklahoma... At low-levels, a moist and unstable airmass is forecast to advect northward across west Texas into the southern Texas Panhandle today. A zone of low-level convergence will likely develop over the southern Texas Panhandle, with upslope flow to the north of this feature. As surface temperatures warm during the day, scattered thunderstorm development is expected near the convergence zone. RAP forecast soundings to the south and east of Amarillo at 21Z have steep low to mid-level lapse rates with large surface temperature-dewpoint spreads. This may be enough for isolated severe wind gusts and hail. ..Broyles/Chalmers.. 05/27/2026 $$ = = = 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]