Winter Storm Warning

NWS Great Falls MT · US

Updated

This event was updated at 2026-10-12 09:55:00 UTC.

Details

Winter Storm Warning Remains In Effect Until 6 AM MDT Monday

Event: Winter Storm Warning
Issued: 2026-10-11 04:40:00 UTC
Onset: 2026-10-11 04:40:00 UTC
Message expires: 2026-10-11 21:15:00 UTC
Expected end: 2026-10-12 12:00:00 UTC
Category: Meteorological
Urgency: Expected
Severity: Severe
Certainty: Likely
Response: Prepare

Description

What

Heavy, wet snow expected. Total snow accumulations between 8 and 16 inches. Highest snowfall amounts in the northern slopes between 4500 feet and 6500 feet. Winds gusting as high as 45 mph.

Where

Elkhorn and Boulder Mountains, Little Belt and Highwood Mountains, and Snowy and Judith Mountains.

When

Until 6 AM MDT Monday.

Impacts

Travel could be very difficult. Gusty winds combined with the wet and heavy nature of the snow could bring down tree branches. Isolated power outages are possible.

Additional details

Snowfall amounts will vary drastically from grassy surfaces to roadways, most notably at lower elevations, with accumulations on non-grassy surfaces being confined mainly to between the evening through late morning hours.

Instructions

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.

Affected areas

Little Belt and Highwood Mountains
Snowy and Judith Mountains
Elkhorn and Boulder Mountains

Public contact

Issuer: NWS Great Falls MT
Website: http://www.weather.gov

Message record

Received: 2026-10-11 04:40:39 UTC
Issue to receipt: ~40s
CAP status: Actual
CAP message type: Update
Lifecycle: Updated
Source: NWWS-OI
Feed: NWWS
Recovered: No

CAP routing and identity

ULID: 01M4MM6M4HHC09BMNRQZ2SWRVS
Identifier: urn:oid:2.49.0.1.840.0.02af72eff6eb04202cb1e430105d169874b37a5f.004.1
Sender: [email protected]
Scope: Public
CAP source: 211803 v2.3.0
Handling codes: IPAWSv1.0
Issuing office: NWS Great Falls MT
AWIPS ID: CAPTFX
NWWS sequence: nwws_processor.6520
WMO heading: XOUS55
WMO data type: CAP alert message XML (XO)
WMO geography: United States (US)
WMO bulletin number: 55

References

Identifier: urn:oid:2.49.0.1.840.0.788ba8280995d2bd49591e4662266b21df9055f3.004.1
Sender: [email protected]
Sent: 2026-10-10 16:56:00 UTC

Identifier: urn:oid:2.49.0.1.840.0.e3247f4b382a0c83c88dbd6ac1ed768dc1c2f4fa.002.1
Sender: [email protected]
Sent: 2026-10-10 22:13:00 UTC

Identifier: urn:oid:2.49.0.1.840.0.5c27555301c61c960e80ee52001e9dfdf3528c34.003.1
Sender: [email protected]
Sent: 2026-10-10 06:32:00 UTC

Identifier: urn:oid:2.49.0.1.840.0.63d055c6b8522eab4f914c4a776454fb26ce1d04.006.1
Sender: [email protected]
Sent: 2026-10-09 17:29:00 UTC

Identifier: urn:oid:2.49.0.1.840.0.63d055c6b8522eab4f914c4a776454fb26ce1d04.003.2
Sender: [email protected]
Sent: 2026-10-09 17:29:00 UTC

Event codes

Name	Value
SAME	WSW
NationalWeatherService	WSW

Parameters

Name	Value
AWIPSidentifier	WSWTFX
WMOidentifier	WWUS45 KTFX 110440
NWSheadline	WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 AM MDT MONDAY
BLOCKCHANNEL	EAS
BLOCKCHANNEL	NWEM
EAS-ORG	WXR
VTEC	/O.CON.KTFX.WS.W.0008.000000T0000Z-261012T1200Z/
eventEndingTime	2026-10-12T06:00:00-06:00
BLOCKCHANNEL	CMAS
expiredReferences	[email protected],urn:oid:2.49.0.1.840.0.5c27555301c61c960e80ee52001e9dfdf3528c34.003.1,2026-10-10T00:32:00-06:00 [email protected],urn:oid:2.49.0.1.840.0.63d055c6b8522eab4f914c4a776454fb26ce1d04.006.1,2026-10-09T11:29:00-06:00 [email protected],urn:oid:2.49.0.1.840.0.63d055c6b8522eab4f914c4a776454fb26ce1d04.003.2,2026-10-09T11:29:00-06:00

Locations

Location data

Little Belt and Highwood Mountains
Snowy and Judith Mountains
Elkhorn and Boulder Mountains

Name	Value
SAME	030013
SAME	030059
SAME	030045
SAME	030015
SAME	030027
SAME	030043
SAME	030007
UGC	MTZ317
UGC	MTZ318
UGC	MTZ322