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Blaine County weather alerts

2 active alerts for Blaine County, Montana right now: a Severe Thunderstorm Warning and a Severe Thunderstorm Watch.

11 in the last 30 days 11 in 12 months (since Aug 30) most common: Severe Thunderstorm Warning Get alerts on your phone →

Active alerts for Blaine County

Refreshed every few minutes; times in MDT.

Severe Immediate

Severe Thunderstorm Warning

Issued Sun, Sep 6, 10:10 PM MDT by NWS Great Falls MT Until Sun, Sep 6, 10:45 PM MDT (in 21 min)

Area: Blaine, MT

At 1010 PM MDT, severe thunderstorms were located along a line extending from 21 miles east of Parker School to 22 miles west of Hays, moving northeast at 30 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. Locations impacted include... Cleveland.

What it means: A storm with hail of 1 inch or larger, winds of 58 mph or more, or both, is occurring or imminent. Move indoors and away from windows.

Full alert with map and forecast →

Severe Future

Severe Thunderstorm Watch

Issued Sun, Sep 6, 10:08 PM MDT by NWS Great Falls MT Until Mon, Sep 7, 1:00 AM MDT (in 3 hr)

Area: Blaine, MT; Chouteau, MT; Fergus, MT; Hill, MT; Liberty, MT

SEVERE THUNDERSTORM WATCH 662 REMAINS VALID UNTIL 1 AM MDT MONDAY FOR THE FOLLOWING AREAS IN MONTANA THIS WATCH INCLUDES 5 COUNTIES IN CENTRAL MONTANA FERGUS IN NORTH CENTRAL MONTANA BLAINE CHOUTEAU HILL LIBERTY THIS INCLUDES THE CITIES OF BIG SANDY, CARTER, CHESTER, CHINOOK, FORT BENTON, GRASS RANGE, HARLEM, HAVRE, HAYS, LEWISTOWN, LEWISTOWN DIVIDE, ROCK...

What it means: Conditions are favourable for severe thunderstorms with large hail or damaging wind. Keep an eye on the sky and on warnings.

Full alert with map and forecast →

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Where

Blaine County on the map

Alert polygons are NWS's own. Forecast Bar's radar shows the same warnings over live precipitation, with future radar and lightning. See the radar.

Last 30 days

Recent alerts for Blaine County

Alert	Issued	Ended	Issued by
Severe Thunderstorm Warning	9:38 PM	10:00 PM	Great Falls MT
Severe Thunderstorm Warning	9:36 PM	10:45 PM	Great Falls MT
Special Weather Statement	9:21 PM	10:00 PM	Great Falls MT
Severe Thunderstorm Warning	9:12 PM	10:00 PM	Great Falls MT
Severe Thunderstorm Warning	9:02 PM	10:00 PM	Great Falls MT
Special Weather Statement	8:40 PM	9:30 PM	Great Falls MT
Severe Thunderstorm Watch	5:53 PM	Sep 7, 1:00 AM	Great Falls MT
Hydrologic Outlook	1:54 AM	12:00 PM	Great Falls MT
Hydrologic Outlook	Sep 5, 10:40 AM	12:00 PM	Great Falls MT

Pattern

What Blaine County gets alerted for

Every alert that named Blaine County in the last 12 months, by type. Records begin August 30, 2026, so this fills in over the year.

Severe Thunderstorm Warning

Hydrologic Outlook

Severe Thunderstorm Watch

Special Weather Statement

Plain English

What these alerts mean

A warning means the hazard is happening or about to; a watch means conditions favour it; an advisory is a lesser hazard still worth planning around.

Severe Thunderstorm Warning

A storm with hail of 1 inch or larger, winds of 58 mph or more, or both, is occurring or imminent. Move indoors and away from windows.

Severe Thunderstorm Watch

Conditions are favourable for severe thunderstorms with large hail or damaging wind. Keep an eye on the sky and on warnings.

Special Weather Statement

A heads-up about conditions that do not meet warning or advisory criteria but still deserve attention, such as a strong storm, patchy fog or a brief burst of snow.

Hydrologic Outlook

Flooding may develop over the coming days as rain, snowmelt or river levels rise.

Nearby

Alerts near Blaine County

Neighbouring counties in Montana

Phillips County1 Fergus County3 Hill County3 Chouteau County2 All of Montana →

Questions

About Blaine County alerts

How do I get Blaine County weather alerts on my iPhone?

Install Forecast Bar, add Blaine County as a location, and turn on severe weather alerts. Every NWS warning, watch and advisory for Blaine County then arrives as a push notification at the moment of issue, with Critical Alerts available for the most dangerous warnings. Forecast Bar also runs on iPad, Apple Watch, Mac and Apple TV.

Where do these alerts come from?

From the National Weather Service alert feed (api.weather.gov). NWS issues alerts by county and by forecast zone; this page lists every product that names Blaine County. Forecast Bar checks the feed continuously and this page refreshes within a few minutes of a change.

What is the difference between a watch, a warning and an advisory?

A warning means the hazard is occurring, imminent or very likely: act now. A watch means conditions are favourable for it to develop: prepare and stay informed. An advisory covers a hazard that is less serious than a warning but can still cause real inconvenience or danger if you are not ready for it.

Can I get this data as JSON?

Yes. /weather-alerts/mt/blaine-county.json returns the active alerts, the last 30 days and the 12-month counts for Blaine County, refreshed every minute. Please cache responses and credit National Weather Service as the source.

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