SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1211 PM CDT Fri Apr 11 2025 Valid 121200Z - 131200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS NORTHERN WYOMING AND SOUTHEAST MONTANA TO THE BLACK HILLS... ...SUMMARY... Isolated severe gusts are possible from the Big Horns to the Black Hills during the late afternoon to mid-evening Saturday. ...Southeast Montana/northeast Wyoming to the Black Hills... A mid-level shortwave trough across the Pacific Northwest/southern British Columbia will advance east through the day Saturday. Height falls across northern Wyoming and southeast Montana will lead to strengthening ascent by late afternoon. Strong heating, featuring temperatures in the low 70s, will support sufficient instability for scattered thunderstorm activity. The deeply-mixed thermodynamic profile will support the potential for some severe wind gusts from this activity. This threat should quickly wane after sunset as the boundary layer cools. ...Mid-MO Valley to the Upper Midwest... A synoptically strong and nocturnally enhanced low-level jet will strengthen Saturday night across the central Plains. This will result in strengthening isentropic ascent in addition to height falls ahead of the approaching mid-level trough. Despite favorable synoptic scale lift, most forecast soundings show limited moisture and a lack of elevated instability. Some guidance has higher quality moisture and develops isolated thunderstorms, but even if storms develop, instability will likely be too weak to support more than small hail. ..Bentley.. 04/11/2025
