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Granite County weather alerts

1 active alert for Granite County, Montana right now: a Winter Weather Advisory.

9 in the last 30 days 25 in 12 months (since Aug 30) most common: Special Weather Statement Get alerts on your phone →

Active alerts for Granite County

Refreshed every few minutes; times in MDT.

Moderate Expected Starts in 1 day

Winter Weather Advisory

Issued Thu, Oct 22, 10:24 AM MDT by NWS Missoula MT Until Sat, Oct 24, 12:00 AM MDT (in 2 day)

Area: Butte/Blackfoot Region

* WHAT...Snow expected above 6000 feet. Total snow accumulations trace to three inches. A period of moderate snow showers may develop around rush hour. * WHERE...MacDonald and Homestake Pass along with Georgetown Lake. * WHEN...From 3 PM Friday to midnight MDT Friday Night. * IMPACTS...Plan on slippery road conditions. The hazardous conditions will impact...

What it means: Snow, sleet or freezing rain that makes travel slippery is expected. Allow extra time and drive carefully.

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Where

Granite 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 Granite County

Alert	Issued	Ended	Issued by
Winter Weather Advisory	10:22 AM	Oct 23, 4:00 PM	Missoula MT
Winter Weather Advisory	Oct 10, 11:42 AM	Oct 12, 6:00 AM	Missoula MT
Winter Storm Warning	Oct 10, 11:42 AM	Oct 12, 6:00 AM	Missoula MT
Winter Storm Watch	Oct 9, 11:35 AM	Oct 11, 6:00 PM	—
Winter Storm Warning	Oct 9, 11:35 AM	Oct 12, 6:00 AM	Missoula MT
Winter Weather Advisory	Oct 9, 11:35 AM	Oct 12, 6:00 AM	Missoula MT
Winter Weather Advisory	Oct 8, 1:30 PM	Oct 11, 6:00 PM	Missoula MT
Winter Storm Watch	Oct 8, 1:30 PM	Oct 11, 6:00 PM	Missoula MT

Pattern

What Granite County gets alerted for

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

Special Weather Statement

Winter Weather Advisory

Flood Watch

Winter Storm Warning

Winter Storm Watch

Severe Thunderstorm Warning

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.

Winter Weather Advisory

Snow, sleet or freezing rain that makes travel slippery is expected. Allow extra time and drive carefully.

Winter Storm Warning

Heavy snow, sleet or ice that makes travel dangerous is occurring or imminent. Avoid travel if you can.

Winter Storm Watch

A significant winter storm is possible. Prepare for hazardous travel and stock up ahead of time.

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.

Flood Watch

Conditions are favourable for flooding. Have a plan in case a warning is issued.

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.

Nearby

Alerts near Granite County

Neighbouring counties in Montana

Deer Lodge County1 Ravalli County Powell County1 Missoula County Silver Bow County1 Lewis and Clark County Beaverhead County1 All of Montana →

Questions

About Granite County alerts

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

Install Forecast Bar, add Granite County as a location, and turn on severe weather alerts. Every NWS warning, watch and advisory for Granite 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 Granite 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/granite-county.json returns the active alerts, the last 30 days and the 12-month counts for Granite County, refreshed every minute. Please cache responses and credit National Weather Service as the source.

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Add Granite County in Forecast Bar and every NWS warning, watch and advisory arrives as a push notification the moment it is issued, on iPhone, iPad, Apple Watch, Mac and Apple TV.

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