Subj : DAY2SVR: Nws Storm Predic To : All From : Mike Powell Date : Thu Jun 25 2026 10:20:10 ACUS02 KWNS 250536 SWODY2 SPC AC 250535 Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1235 AM CDT Thu Jun 25 2026 Valid 261200Z - 271200Z ....THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS THE HIGH PLAINS AND EASTWARD ACROSS SOUTHERN KANSAS AND NORTHERN OKLAHOMA TO THE OHIO VALLEY... ....SUMMARY... Isolated severe storms capable of large hail and severe wind gusts will be possible across the High Plains, southern Kansas and northern Oklahoma, and into the Ohio Valley on Friday. Additional severe storms capable of damaging wind and isolated large hail will also be possible across portions of the Northeast. ....Synopsis... A mid-level trough will amplify across the Northwest CONUS on Friday as ridging builds across the Plains. A broad surface low will exist from northwest Texas into Missouri along a frontal zone. A lee cyclone will develop across the northern High Plains as the primary trough starts to eject over the northern Rockies. This will result in strengthening southerly flow across the Plains and destabilization from eastern Colorado into eastern Wyoming and perhaps far southeast Montana. ....High Plains... Weak to moderate destabilization is forecast across the High Plains as dewpoints increase into the 60s during the afternoon. Slight height rises may limit storm coverage somewhat, but as storms form across the terrain Friday afternoon/evening, the environment downstream should support these storms continuing. Some storm organization and transient rotating updrafts are possible from northeast Colorado into eastern Wyoming, but only modest effective shear (around 25 knots) should limit overall storm intensity somewhat. Nonetheless, some large hail and severe wind threat is possible. ....Central/southern Plains to the Ohio Valley... Storms will likely be ongoing at the beginning of the period across Missouri and into southern Illinois and Indiana. These storms should weaken as the move east of the greatest instability by late morning. In the wake of this activity, moderate to strong destabilization is expected. This should prove sufficient for isolated to scattered storm development along the remnant frontal zone/outflow boundary during the afternoon/evening. Most guidance shows 35 to 40 knot mid-level flow remaining across the region which should be sufficient for supercell organization. In addition, a vorticity rich environment will likely be present in the wake of morning storms. If sufficient destabilization can occur within this airmass, some tornado threat may exist. Most notably, the NAM shows a more volatile scenario with a stronger mid-level shortwave trough and a more defined surface low moving along the boundary. This scenario appears to be a clear outlier among 00Z guidance. However, it does represent the ceiling of this potential scenario. While a marginal hail/wind/isolated tornado threat seems like the most likely scenario, guidance will be monitored closely for any hint of this more intense NAM solution. ....Northeast... A line of storms will move through the Northeast Friday morning. In the wake of these storms, some destabilization is expected ahead of a cold front moving through the area. There is some uncertainty about the degree of destabilization, but at least weak instability is shown by most guidance. A strong mid-level jet streak across the region (50+ knots) will provide long/straight hodographs. This will support the potential for isolated large hail and damaging wind gusts with the strongest storms. ...Bentley.. 06/25/2026 $$ --- SBBSecho 3.28-Linux * Origin: ILink: CCO - capitolcityonline.net (454:3/107) .