Big Sky Weather

18/09/2025

*** THIS PRODUCT HAS EXPIRED ***

There's a strong storm moving south, approaching the Winnett area in Petroleum county. Wind gusts over 40 mph and nickel-sized hail are possible.

If you are under this storm, feel free to report what you had (in the comments section). Thank you.

18/09/2025

At 712 PM MDT 9/17/25, Doppler radar was tracking a strong thunderstorm 10 miles southeast of Ballantine moving south at 20 mph.

HAZARD...Wind gusts up to 40 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible.

Locations impacted include... Crow Indian Reservation.

This statement does not include Billings

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service.

Torrential rainfall is also occurring with this storm and may lead to flash flooding. Do not drive your vehicle through flooded roadways.

17/09/2025

9/17/25 2pm:
Building thunderstorms are putting down some good rain in Terry and moving south-southeast.

Folks in Prairie County and Northern Custer County should be aware of approaching inclement weather.

Moderate lightning activity has been observed.

16/09/2025

At 703 PM MDT 9/15/25, Doppler radar was tracking a line of thunderstorms extending from 7 miles north of Biddle to 11 miles southeast of Alzada, moving northeast at 25 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Observed.

IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects.

Locations impacted include... Broadus, Alzada, Biddle, Hammond, Boyes, Ridge, Belle Creek and Albion.

A weather station along Highway 59 south of Biddle reported a 45 mph wind gust at 6:45 PM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening weather conditions.

15/09/2025

⛈💨 A series of severe-warned storms moved through the Helena and Great Falls areas last night, producing very strong outflow winds. There was even some tree damage reported in the Helena Valley. Here are some of the top gusts around southwest and north-central Montana.

Although large-scale wind events have been few and far between recently, we are watching the potential for winds to pick up for most of the state this coming weekend and into early next week.

15/09/2025

🟩Monday 9/15/25:
A level one risk for thunderstorms to produce damaging wind gusts in extreme southeastern Montana today.

Otherwise, thunderstorms are possible for nearly the entire state.

15/09/2025

A bit of aurora borealis tonight.

14/09/2025

At 605 PM MDT 9/13/25, Doppler radar was tracking a strong thunderstorm 11 miles south of Vida, or 18 miles northeast of Circle, moving northeast at 25 mph.

HAZARD...Wind gusts up to 50 mph and nickel size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible.

Locations impacted include... Richey and Vida.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

13/09/2025

9/13/25: FLASH FLOOD RISK
Moisture, increasing instability and slow cell motions with some back-building training possible.
Rates of 1.5"/hr and localized 2-3" totals may result in possible scattered incidents of flash flooding through early overnight period.

13/09/2025

9/13/25:
Looks like the possibility for some hail in eastern Montana this afternoon/evening.
A level one risk has been slipped over several counties.
This is for the towns of Baker, Glendive, and Terry just to name a few.

13/09/2025

There was a landspout tornado in Fergus County Friday afternoon. As we go through this weekend, the weather will become sunnier and drier.

13/09/2025