High Plains Storms Build Damaging Wind Clusters into Dakotas — SevereWX

Thunderstorms are ramping up across the high terrain in eastern Montana and northeastern Wyoming, with clusters pushing eastward into the western Dakotas this afternoon and evening.

The Storm Prediction Center highlights a primed environment downstream: temperatures soaring into the upper 90s to 100s°F, dew points in the 50s-60s°F, and eroding MLCIN amid steep lapse rates and moderate instability. This setup favors strong downdraft gusts, with SPC mesoanalysis pointing to potential for organized clusters producing severe winds.

Peak wind gusts could reach 55-70 mph, alongside hail up to 1.25 inches. A cluster already hit eastern North Dakota with 57 mph gusts, and more activity is expected to develop and spread through late afternoon.

SPC Mesoscale Discussion 1797 flags a 60% chance of a watch issuance to cover this evolving threat, valid until around 4:45 PM Moderate.

Impacts: Primarily damaging straight-line winds capable of downing trees, power lines, and causing travel disruptions in rural areas. Isolated larger hail possible but secondary.

Stay prepared: Monitor local warnings, secure outdoor items, and have a severe weather plan ready. Check radar updates frequently as storms evolve rapidly in this heating environment.