SPC Forecasts Slight Risk of Severe Thunderstorms Across US Northern High Plains and Great Basin

The NWS Storm Prediction Center (SPC) has issued a Day 1 Convective Outlook, updated on August 24, 2026, at 01:02 UTC, indicating a slight risk of severe thunderstorms across the Northern High Plains and Great Basin. These storms are capable of producing large hail and severe-caliber wind gusts, continuing through the evening across eastern Montana and the western Dakotas, with other severe storms possible in the Great Basin.