BBS: TELESC.NET.BR Assunto: DAY2SVR: Nws Storm Prediction Center Norman Ok De: COD Weather Processor Data: Thu, 28 May 2026 17:20:34 +0000 ----------------------------------------------------------- ACUS02 KWNS 281720 SWODY2 SPC AC 281718 Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1218 PM CDT Thu May 28 2026 Valid 291200Z - 301200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FOR PORTIONS OF WESTERN AND NORTHERN MONTANA...THE CENTRAL HIGH PLAINS...AND THE SOUTHERN HIGH PLAINS INTO THE CENTRAL PLAINS... ...SUMMARY... A few storms may produce marginal hail or strong gusts from eastern New Mexico and western Texas across Oklahoma and toward Kansas on Friday. A few strong to severe storms may also occur across western Montana with gusty winds and marginal hail. Isolated severe storms are also possible across portions of the central High Plains. ...Synopsis... A closed low across the Great Basin will become an open wave on Friday and start to advance northeast toward the central Rockies. As this occurs, lee troughing will begin across the southern and central High Plains and into eastern Montana. A strong mid-level trough will move southward across eastern Canada into the Northeast. ...Western into north-central Montana... Weak to moderate instability will build across western Montana on Friday as dewpoints increase into the mid 50s and mid-level temperatures cool. Mid-level flow is forecast to increase to 25 to 30 knots across western Montana which may provide sufficient shear for a few more organized storms. These storms should develop by mid-afternoon and move northward, potentially growing upscale into one or more linear structures. ...Central High Plains... Surface moisture is forecast to back up near the terrain across northern Colorado and southeast Wyoming on Friday. This will lead to weak to moderate instability across the region. In addition to typical terrain circulations, guidance suggests a weak mid-level shortwave trough may emerge across the region and provide additional support for storm development. Shear is forecast to remain relatively weak, but weak to moderate instability, and steep lapse rates will support some threat for severe wind gusts and perhaps isolated large hail. ...Southern High Plains into the central Plains... A southern stream mid-level jet streak is forecast to emerge from northern Mexico into the southern High Plains Friday afternoon/evening. This ~40 knot jet streak will overspread portions of the southern High Plains and the dryline. This should provide ample shear for storm organization during the afternoon/evening. Greater storm coverage and storm organization may exist between Midland and Amarillo at the nose of this stronger mid-level flow. However, it appears the greater moisture will remain farther east and thus, storm intensity maybe somewhat mitigated. Therefore, hail/wind probabilities remain 5% at this time. Additional storms may develop from central Kansas to north-central Oklahoma along a frontal boundary amid weak isentropic ascent. Greater instability is expected within this zone, however, mid-level flow is forecast to be weaker which may challenge storm organization. ..Bentley.. 05/28/2026 $$ = = = 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]