Winter Storm Warning 12, NWS Great Falls, MT

856 
WWUS45 KTFX 030319
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
819 PM MST Sat Dec 2 2017

MTZ015-055-031830-
/O.CON.KTFX.WS.W.0012.171203T1200Z-171204T1200Z/
/O.CON.KTFX.WW.Y.0047.171203T1200Z-171204T1200Z/
Madison-Gallatin-
Including the following locations Ennis, Norris Hill, 
Raynolds Pass, Twin Bridges, Virginia City, Bozeman, 
West Yellowstone, Battle Ridge Pass, Bozeman Pass, 
and Targhee Pass
819 PM MST Sat Dec 2 2017

...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 AM SUNDAY TO
5 AM MST MONDAY ABOVE 5500 FEET...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 AM SUNDAY TO
5 AM MST MONDAY BELOW 5500 FEET...

* WHAT...Heavy snow expected above 5500 feet. Accumulating snow
  expected below 5500 feet. Plan on difficult travel conditions at
  times. Total snow accumulations of 2 to 5 inches below 5500
  feet, and 6 to 12 inches above 5500 feet.

* WHERE...Madison and Gallatin counties.

* WHEN...From 5 AM Sunday to 5 AM MST Monday.

* ADDITIONAL DETAILS...Be prepared for significant reductions in
  visibility at times. Expect wet roadways to freeze over Sunday
  night, as temperatures fall into the teens by Monday morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions are expected. 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.

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

$$

MTZ008-031830-
/O.CON.KTFX.WW.Y.0047.171203T0700Z-171204T0500Z/
Beaverhead-
Including the following locations Big Hole Pass, Wisdom, Dillon, 
Chief Joseph Pass, Monida Pass, and Wise River
819 PM MST Sat Dec 2 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT
TONIGHT TO 10 PM MST SUNDAY...

* WHAT...Periods of snow expected through Sunday evening. Plan on
  slippery road conditions. Total snow accumulations of 2 to 4
  inches at lower elevations, and 4 to 8 inches in the mountains.
  Isolated amounts up to 10 inches are possible across the higher 
  peaks.

* WHERE...Beaverhead.

* WHEN...From midnight tonight to 10 PM MST Sunday.

* ADDITIONAL DETAILS...Be prepared for significant reductions in
  visibility at times. Expect wet roadways to freeze over Sunday
  night, as temperatures fall into the teens by Monday morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

$$

MTZ014-052>054-031830-
/O.CON.KTFX.WW.Y.0047.171203T0900Z-171204T0500Z/
Central and Southern Lewis and Clark-Jefferson-Broadwater-Meagher-
Including the following locations Helena, Lincoln, 
MacDonald Pass, Rogers Pass, Montana City, Boulder, Boulder Hill,
Elk Park Pass, Homestake Pass, Whitehall, Toston, Townsend, 
Martinsdale, and White Sulphur Springs
819 PM MST Sat Dec 2 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 2 AM TO 10 PM
MST SUNDAY...

* WHAT...Periods of snow expected through Sunday evening. Plan on
  slippery road conditions. Total snow accumulations of 3 to 5
  inches at lower elevations, and 4 to 8 inches in the mountains.

* WHERE...Central and Southern Lewis and Clark, Jefferson, 
  Broadwater and Meagher.

* WHEN...From 2 AM to 10 PM MST Sunday.

* ADDITIONAL DETAILS...Be prepared for significant reductions in
  visibility at times. Expect wet roadways to freeze over Sunday
  night, as temperatures fall into the teens by Monday morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

$$

MTZ012-048>051-031830-
/O.CON.KTFX.WW.Y.0047.171203T1200Z-171204T0500Z/
Cascade-Southern Rocky Mountain Front-Eastern Teton-Judith Basin-
Fergus-
Including the following locations Great Falls, Cascade, Belt, 
Kings Hill Pass, Bynum, Choteau, Augusta, Fairfield, Dutton, 
Raynesford, Stanford, Hobson, Lewistown, Winifred, 
Lewistown Divide, and Grass Range
819 PM MST Sat Dec 2 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 AM TO 10 PM
MST SUNDAY...

* WHAT...Periods of snow expected Sunday through Sunday evening. 
  Plan on slippery road conditions. Total snow accumulations of 2 
  to 4 inches at lower elevations, and 4 to 8 inches in the 
  mountains.

* WHERE...Cascade, Southern Rocky Mountain Front, Eastern Teton, 
  Judith Basin and Fergus.

* WHEN...From 5 AM to 10 PM MST Sunday.

* ADDITIONAL DETAILS...Be prepared for significant reductions in 
  visibility at times. Expect wet roadways to freeze over Sunday 
  night, as temperatures fall into the teens by Monday morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

$$

http://www.weather.gov/greatfalls

063 
WWUS45 KTFX 031015
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
315 AM MST Sun Dec 3 2017

MTZ015-055-040115-
/O.CON.KTFX.WS.W.0012.171203T1200Z-171204T1200Z/
/O.CON.KTFX.WW.Y.0047.171203T1200Z-171204T1200Z/
Madison-Gallatin-
Including the following locations Ennis, Norris Hill, 
Raynolds Pass, Twin Bridges, Virginia City, Bozeman, 
West Yellowstone, Battle Ridge Pass, Bozeman Pass, 
and Targhee Pass
315 AM MST Sun Dec 3 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST MONDAY
ABOVE 5500 FEET...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST
MONDAY BELOW 5500 FEET...

* WHAT...Snow, moderate to heavy at times, is expected. Plan on
  difficult travel conditions. Above 5500 feet, total snow
  accumulations of 5 to 10 inches, with localized amounts up to 18
  inches, are expected. Below 5500 feet, total snow accumulations
  of 1 to 4 inches, with localized amounts up to 6 inches, are 
  expected.

* WHERE...Madison and Gallatin Counties, with the higher snow
  amounts coming above 5500 feet.

* WHEN...Today through 5 AM MST Monday.

* ADDITIONAL DETAILS...Be prepared for significant reductions in
  visibility at times. Those outdoors should prepare for the
  return of winter conditions, along with increased avalanche 
  danger.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions are expected. 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.

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

$$

MTZ014-052>054-040115-
/O.EXT.KTFX.WW.Y.0047.000000T0000Z-171204T1200Z/
Central and Southern Lewis and Clark-Jefferson-Broadwater-Meagher-
Including the following locations Helena, Lincoln, 
MacDonald Pass, Rogers Pass, Montana City, Boulder, Boulder Hill,
Elk Park Pass, Homestake Pass, Whitehall, Toston, Townsend, 
Martinsdale, and White Sulphur Springs
315 AM MST Sun Dec 3 2017

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 5 AM MST MONDAY...

* WHAT...Snow occurring. Plan on difficult travel conditions,
  especially at pass level. Additional snow accumulations of 2 to
  6 inches, with 6 to 12 inches across the mountain peaks, are 
  expected.

* WHERE...Central and Southern Lewis and Clark, Jefferson, 
  Broadwater and Meagher Counties.

* WHEN...Until 5 AM MST Monday.

* ADDITIONAL DETAILS...Be prepared for reduced visibilities at
  times. Those outdoors should prepare for the return of winter
  conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

$$

MTZ012-048>051-040115-
/O.EXT.KTFX.WW.Y.0047.171203T1200Z-171204T1200Z/
Cascade-Southern Rocky Mountain Front-Eastern Teton-Judith Basin-
Fergus-
Including the following locations Great Falls, Cascade, Belt, 
Kings Hill Pass, Bynum, Choteau, Augusta, Fairfield, Dutton, 
Raynesford, Stanford, Hobson, Lewistown, Winifred, 
Lewistown Divide, and Grass Range
315 AM MST Sun Dec 3 2017

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 5 AM MST MONDAY...

* WHAT...Snow expected. Plan on slippery road conditions. Total
  snow accumulations of 1 to 4 inches, with localized amounts of 
  5 to 8 inches across the mountains, are expected.

* WHERE...Cascade, Southern Rocky Mountain Front, Eastern Teton,
  Judith Basin and Fergus Counties. Those outdoors should prepare
  for the return of winter conditions.

* WHEN...Until 5 AM MST Monday.

* ADDITIONAL DETAILS...Be prepared for reduced visibilities at 
  times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

$$

MTZ008-040115-
/O.CON.KTFX.WW.Y.0047.000000T0000Z-171204T0500Z/
Beaverhead-
Including the following locations Big Hole Pass, Wisdom, Dillon, 
Chief Joseph Pass, Monida Pass, and Wise River
315 AM MST Sun Dec 3 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 PM MST THIS
EVENING...

* WHAT...Snow occurring. Plan on difficult travel conditions. 
  Additional snow accumulations of 3 to 6 inches, with localized 
  amounts up to 12 inches, are expected.

* WHERE...Beaverhead.

* WHEN...Until 10 PM MST this evening.

* ADDITIONAL DETAILS...Be prepared for reduced visibilities at 
  times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

$$

http://www.weather.gov/greatfalls

363 
WWUS45 KTFX 031604
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
904 AM MST Sun Dec 3 2017

MTZ048-049-031715-
/O.CAN.KTFX.WW.Y.0047.000000T0000Z-171204T1200Z/
Southern Rocky Mountain Front-Eastern Teton-
904 AM MST Sun Dec 3 2017

...WINTER WEATHER ADVISORY IS CANCELLED...

Light is possible at times through today. However, any new snow
accumulations will be less than one inch.

$$

MTZ015-055-040000-
/O.CON.KTFX.WS.W.0012.000000T0000Z-171204T1200Z/
/O.CON.KTFX.WW.Y.0047.000000T0000Z-171204T1200Z/
Madison-Gallatin-
Including the following locations Ennis, Norris Hill, 
Raynolds Pass, Twin Bridges, Virginia City, Bozeman, 
West Yellowstone, Battle Ridge Pass, Bozeman Pass, 
and Targhee Pass
904 AM MST Sun Dec 3 2017

...WINTER STORM WARNING REMAINS IN EFFECT
UNTIL 5 AM MST MONDAY ABOVE 5500 FEET...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT
UNTIL 5 AM MST MONDAY BELOW 5500 FEET...

* WHAT...Snow, heavy at times this afternoon through this evening.
  Total snow accumulations of 2 to 5 inches below 5500 feet and 6
  to 12 inches above 5500 feet. 

* WHERE...Madison and Gallatin counties.

* WHEN...Until 5 AM MST Monday.

* ADDITIONAL DETAILS...Visibility will be reduced to less than 
  one half mile at times in periods of heavier snowfall this 
  afternoon and evening. Wet roads will become snow and ice 
  covered tonight as colder air moves into the region. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Listen to NOAA Weather Radio or your local media for the latest
updates on this situation.

$$

MTZ008-040000-
/O.CON.KTFX.WW.Y.0047.000000T0000Z-171204T0500Z/
Beaverhead-
Including the following locations Big Hole Pass, Wisdom, Dillon, 
Chief Joseph Pass, Monida Pass, and Wise River
904 AM MST Sun Dec 3 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT
UNTIL 10 PM MST THIS EVENING...

* WHAT...Snow occurring. Plan on slippery road conditions.
  Additional snow accumulations of 3 to 5 inches.

* WHERE...Beaverhead County.

* WHEN...Until 10 PM MST this evening.

* ADDITIONAL DETAILS...Visibility will be reduced to less than one  
  mile at times in periods of heavier snowfall this afternoon and 
  evening. Wet roads will become snow and ice covered tonight as 
  colder air moves into the region. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Listen to NOAA Weather Radio or your local media for the latest
updates on this situation.

$$

MTZ014-052>054-040000-
/O.CON.KTFX.WW.Y.0047.000000T0000Z-171204T1200Z/
Central and Southern Lewis and Clark-Jefferson-Broadwater-Meagher-
Including the following locations Helena, Lincoln, 
MacDonald Pass, Rogers Pass, Montana City, Boulder, Boulder Hill,
Elk Park Pass, Homestake Pass, Whitehall, Toston, Townsend, 
Martinsdale, and White Sulphur Springs
904 AM MST Sun Dec 3 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT
UNTIL 5 AM MST MONDAY...

* WHAT...Snow occurring. Plan on slippery road conditions. Total
  snow accumulations of 2 to 4 inches at lower elevations and 4 to
  8 inches in the mountains.

* WHERE...Central and Southern Lewis and Clark, Jefferson, 
  Broadwater and Meagher counties. 

* WHEN...Until 5 AM MST Monday.

* ADDITIONAL DETAILS...Visibility will be reduced to less than one  
  mile at times in periods of heavier snowfall this afternoon and 
  evening. Wet roads will become snow and ice covered tonight as 
  colder air moves into the region. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Listen to NOAA Weather Radio or your local media for the latest
updates on this situation.

$$

MTZ050-051-040000-
/O.CON.KTFX.WW.Y.0047.000000T0000Z-171204T1200Z/
Judith Basin-Fergus-
Including the following locations Raynesford, Stanford, Hobson, 
Lewistown, Winifred, Lewistown Divide, and Grass Range
904 AM MST Sun Dec 3 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT
UNTIL 5 AM MST MONDAY...

* WHAT...Periods of snow occurring. Total snow accumulations of 2
  to 4 inches at lower elevations and 4 to 8 inches in the
  mountains.

* WHERE...Judith Basin and Fergus counties.

* WHEN...Until 5 AM MST Monday.

* ADDITIONAL DETAILS...Visibility will be reduced to less than one  
  mile at times in periods of heavier snowfall this afternoon and 
  evening. Wet roads will become snow and ice covered tonight as 
  colder air moves into the region. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Listen to NOAA Weather Radio or your local media for the latest
updates on this situation.

$$

MTZ012-040000-
/O.CON.KTFX.WW.Y.0047.000000T0000Z-171204T1200Z/
Cascade-
Including the following locations Cascade, Belt, 
and Kings Hill Pass
904 AM MST Sun Dec 3 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT
UNTIL 5 AM MST MONDAY FOR THE SOUTHERN HALF OF CASCADE COUNTY...

* WHAT...Periods of snow occurring. Total snow accumulations of 2
  to 4 inches at lower elevations and 4 to 8 inches in the
  mountains.

* WHERE...For the southern half of Cascade County. The city of
  Great Falls is no longer in the advisory.

* WHEN...Until 5 AM MST Monday.

* ADDITIONAL DETAILS...Visibility will be reduced to less than one  
  mile at times in periods of heavier snowfall this afternoon and 
  evening. Wet roads will become snow and ice covered tonight as 
  colder air moves into the region. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Listen to NOAA Weather Radio or your local media for the latest
updates on this situation.


$$

http://www.weather.gov/greatfalls

267 
WWUS45 KTFX 032042
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
142 PM MST Sun Dec 3 2017

MTZ015-055-040500-
/O.CON.KTFX.WS.W.0012.000000T0000Z-171204T1200Z/
/O.CON.KTFX.WW.Y.0047.000000T0000Z-171204T1200Z/
Madison-Gallatin-
Including the following locations Ennis, Norris Hill, 
Raynolds Pass, Twin Bridges, Virginia City, Bozeman, 
West Yellowstone, Battle Ridge Pass, Bozeman Pass, 
and Targhee Pass
142 PM MST Sun Dec 3 2017

...WINTER STORM WARNING REMAINS IN EFFECT
UNTIL 5 AM MST MONDAY ABOVE 5500 FEET...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT
UNTIL 5 AM MST MONDAY BELOW 5500 FEET...

* WHAT...Periods of snow...heavy at times occurring. New snow
  accumulations of 1 to 3 inches at lower elevations and 4 to 8
  inches in the mountains.

* WHERE...Madison and Gallatin counties.

* WHEN...Until 5 AM MST Monday.

* ADDITIONAL DETAILS...Be prepared for significant reductions in
  visibility at times. The snow will be heavy at times through
  early this evening. Roadways will become icy overnight as
  temperatures fall into the teens.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Listen to NOAA Weather Radio or your local media for the latest
updates on this situation.

$$

MTZ008-040500-
/O.CON.KTFX.WW.Y.0047.000000T0000Z-171204T0500Z/
Beaverhead-
Including the following locations Big Hole Pass, Wisdom, Dillon, 
Chief Joseph Pass, Monida Pass, and Wise River
142 PM MST Sun Dec 3 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT
UNTIL 10 PM MST THIS EVENING...

* WHAT...Snow occurring. Plan on slippery road conditions. 
  Additional snow accumulations of 1 to 3 inches are expected.

* WHERE...Beaverhead County.

* WHEN...Until 10 PM MST this evening.

* ADDITIONAL DETAILS...Be prepared for significant reductions in
  visibility at times. Roadways will become icy overnight as 
  temperatures fall into the teens.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Listen to NOAA Weather Radio or your local media for the latest
updates on this situation.

$$

MTZ014-052>054-040500-
/O.CON.KTFX.WW.Y.0047.000000T0000Z-171204T1200Z/
Central and Southern Lewis and Clark-Jefferson-Broadwater-Meagher-
Including the following locations Helena, Lincoln, 
MacDonald Pass, Rogers Pass, Montana City, Boulder, Boulder Hill,
Elk Park Pass, Homestake Pass, Whitehall, Toston, Townsend, 
Martinsdale, and White Sulphur Springs
142 PM MST Sun Dec 3 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT
UNTIL 5 AM MST MONDAY...

* WHAT...Snow occurring. Plan on slippery road conditions.
  Additional snow accumulations around 1 inch at lower elevations
  an up to 3 inches in the mountains.

* WHERE...Central and Southern Lewis and Clark, Jefferson, 
  Broadwater and Meagher counties.

* WHEN...Until 5 AM MST Monday.

* ADDITIONAL DETAILS...Be prepared for significant reductions in
  visibility at times. Roadways will become icy overnight as 
  temperatures fall into the teens.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Listen to NOAA Weather Radio or your local media for the latest
updates on this situation.

$$

MTZ050-051-040500-
/O.CON.KTFX.WW.Y.0047.000000T0000Z-171204T1200Z/
Judith Basin-Fergus-
Including the following locations Raynesford, Stanford, Hobson, 
Lewistown, Winifred, Lewistown Divide, and Grass Range
142 PM MST Sun Dec 3 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT
UNTIL 5 AM MST MONDAY...

* WHAT...Snow occurring. Plan on slippery road conditions.
  Additional snow accumulations of up to 2 inches at lower 
  elevations and up to 4 inches in the mountains.

* WHERE...Judith Basin and Fergus counties.

* WHEN...Until 5 AM MST Monday.

* ADDITIONAL DETAILS...Be prepared for significant reductions in
  visibility at times. Roadways will become icy overnight as 
  temperatures fall into the teens.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Listen to NOAA Weather Radio or your local media for the latest
updates on this situation.

$$

MTZ012-040500-
/O.CON.KTFX.WW.Y.0047.000000T0000Z-171204T1200Z/
Cascade-
Including the following locations Cascade, Belt, 
and Kings Hill Pass
142 PM MST Sun Dec 3 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT
UNTIL 5 AM MST MONDAY FOR THE SOUTHERN AND EASTERN PORTIONS OF
CASCADE COUNTY...

* WHAT...Snow occurring. Plan on slippery road conditions.
  Additional snow accumulations of up to two inches in the
  mountains.

* WHERE...Southern and eastern portions of Cascade County.

* WHEN...Until 5 AM MST Monday.

* ADDITIONAL DETAILS...Be prepared for significant reductions in
  visibility at times. Roadways will become icy overnight as 
  temperatures fall into the teens.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Listen to NOAA Weather Radio or your local media for the latest
updates on this situation.

$$

http://www.weather.gov/greatfalls

031 
WWUS45 KTFX 040319
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
819 PM MST Sun Dec 3 2017

MTZ050-051-040430-
/O.CAN.KTFX.WW.Y.0047.000000T0000Z-171204T1200Z/
Judith Basin-Fergus-
819 PM MST Sun Dec 3 2017

...WINTER WEATHER ADVISORY IS CANCELLED...

Light snow showers will continue to move from northwest to
southeast across portions of Fergus and Judith Basin Counties 
this evening, however, only minor accumulations are expected. For 
this reason, the Winter Weather Advisory has been cancelled. 
Roadways will likely become icy overnight as temperatures fall 
into the teens, thus motorist are urged to exercise caution.

$$

MTZ008-040430-
/O.CAN.KTFX.WW.Y.0047.000000T0000Z-171204T0500Z/
Beaverhead-
819 PM MST Sun Dec 3 2017

...WINTER WEATHER ADVISORY IS CANCELLED...

Light snow showers will continue to move from northwest to
southeast across portions of Beaverhead County this evening, 
however, only minor accumulations are expected. For this reason, 
the Winter Weather Advisory has been cancelled. Roadways will 
likely become icy overnight as temperatures fall into the teens, 
thus motorist are urged to exercise caution.

$$

MTZ015-055-041200-
/O.CON.KTFX.WS.W.0012.000000T0000Z-171204T1200Z/
/O.CON.KTFX.WW.Y.0047.000000T0000Z-171204T1200Z/
Madison-Gallatin-
Including the following locations Ennis, Norris Hill, 
Raynolds Pass, Twin Bridges, Virginia City, Bozeman, 
West Yellowstone, Battle Ridge Pass, Bozeman Pass, 
and Targhee Pass
819 PM MST Sun Dec 3 2017

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST MONDAY
ABOVE 5500 FEET...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST
MONDAY BELOW 5500 FEET...

* WHAT...Periods of snow...heavy at times occurring. Plan on 
  difficult travel conditions. Above 5500 feet, additional snow 
  accumulations of 2 to 4 inches are expected. Below 5500 feet, 
  additional snow accumulations of up to two inches are expected.

* WHERE...Madison and Gallatin.

* WHEN...Until 5 AM MST Monday.

* ADDITIONAL DETAILS...Be prepared for significant reductions in
  visibility at times. The snow will be heavy at times through
  early this evening. Roadways will become icy overnight as
  temperatures fall into the teens.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Listen to NOAA Weather Radio or your local media for the latest
updates on this situation.

$$

MTZ014-052>054-041200-
/O.CON.KTFX.WW.Y.0047.000000T0000Z-171204T1200Z/
Central and Southern Lewis and Clark-Jefferson-Broadwater-Meagher-
Including the following locations Helena, Lincoln, 
MacDonald Pass, Rogers Pass, Montana City, Boulder, Boulder Hill,
Elk Park Pass, Homestake Pass, Whitehall, Toston, Townsend, 
Martinsdale, and White Sulphur Springs
819 PM MST Sun Dec 3 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST
MONDAY...

* WHAT...Snow occurring. Plan on slippery road conditions. 
  Additional snow accumulations of up to two inches are expected.

* WHERE...Central and Southern Lewis and Clark, Jefferson, 
  Broadwater and Meagher.

* WHEN...Until 5 AM MST Monday.

* ADDITIONAL DETAILS...Be prepared for significant reductions in
  visibility at times. The snow will be heavy at times through
  early this evening. Roadways will become icy overnight as
  temperatures fall into the teens.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Listen to NOAA Weather Radio or your local media for the latest
updates on this situation.

$$

MTZ012-041200-
/O.CON.KTFX.WW.Y.0047.000000T0000Z-171204T1200Z/
Cascade-
Including the following locations Cascade, Belt, 
and Kings Hill Pass
819 PM MST Sun Dec 3 2017

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST
MONDAY...

* WHAT...Snow occurring. Plan on slippery road conditions.
  Additional snow accumulations of up to two inches are expected,
  especially near Kings Hill Pass.

* WHERE...Cascade.

* WHEN...Until 5 AM MST Monday.

* ADDITIONAL DETAILS...Be prepared for significant reductions in
  visibility at times. The snow will be heavy at times through
  early this evening. Roadways will become icy overnight as
  temperatures fall into the teens.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Listen to NOAA Weather Radio or your local media for the latest
updates on this situation.

$$

http://www.weather.gov/greatfalls

887 
WWUS45 KTFX 040947
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
247 AM MST Mon Dec 4 2017

MTZ015-055-041600-
/O.CAN.KTFX.WS.W.0012.000000T0000Z-171204T1200Z/
/O.EXT.KTFX.WW.Y.0047.000000T0000Z-171204T1600Z/
Madison-Gallatin-
Including the following locations Ennis, Norris Hill, 
Raynolds Pass, Twin Bridges, Virginia City, Bozeman, 
West Yellowstone, Battle Ridge Pass, Bozeman Pass, 
and Targhee Pass
247 AM MST Mon Dec 4 2017

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 9 AM MST THIS
MORNING...
...WINTER STORM WARNING IS CANCELLED...

* WHAT...Snow occurring. Plan on slippery road conditions to 
  continue through the morning commute. Additional snow 
  accumulations of up to two inches are expected.

* WHERE...Madison and Gallatin.

* WHEN...Until 9 AM MST this morning.

* ADDITIONAL DETAILS...Be prepared for reduced visibilities at
  times. Motorists should allow extra time for their morning
  commute, and give plow crews extra space to work. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

$$

MTZ014-052>054-041600-
/O.EXT.KTFX.WW.Y.0047.000000T0000Z-171204T1600Z/
Central and Southern Lewis and Clark-Jefferson-Broadwater-Meagher-
Including the following locations Helena, Lincoln, 
MacDonald Pass, Rogers Pass, Montana City, Boulder, Boulder Hill,
Elk Park Pass, Homestake Pass, Whitehall, Toston, Townsend, 
Martinsdale, and White Sulphur Springs
247 AM MST Mon Dec 4 2017

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 9 AM MST THIS
MORNING...

* WHAT...Snow occurring. Plan on slippery road conditions to
  continue through the morning commute. Additional snow 
  accumulations of up to two inches are expected.

* WHERE...Central and Southern Lewis and Clark, Jefferson, 
  Broadwater and Meagher.

* WHEN...Until 9 AM MST this morning.

* ADDITIONAL DETAILS...Be prepared for reduced visibilities at
  times. Motorists should allow extra time for their morning
  commute, and give plow crews extra space to work. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

$$

MTZ012-041600-
/O.EXT.KTFX.WW.Y.0047.000000T0000Z-171204T1600Z/
Cascade-
Including the following locations Great Falls, Cascade, Belt, 
and Kings Hill Pass
247 AM MST Mon Dec 4 2017

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 9 AM MST THIS
MORNING...

* WHAT...Snow occurring. Plan on slippery road conditions through
  the morning commute. Additional snow accumulations of up to one
  inch are expected.

* WHERE...Cascade.

* WHEN...Until 9 AM MST this morning.

* ADDITIONAL DETAILS...Be prepared for reduced visibilities at
  times. Motorists should allow extra time for their morning
  commute, and give plow crews extra space to work.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Be prepared for snow covered
roads and limited visibilities, and use caution while driving.
The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

$$

http://www.weather.gov/greatfalls

Area Forecast Discussion
National Weather Service Great Falls MT
1016 AM MST Sat Dec 2 2017

.SYNOPSIS...
An upper level trof of low pressure will approach the region from
the west tonight and gradually move through the region on Sunday.
Expect periods of snow for many areas on Sunday, with the
potential for heavy snow around the Big Sky and West Yellowstone
area. Temperatures will be colder for Sunday and Monday, with
afternoon highs mostly in the upper 20s and lower 30s. Warmer air
slowly starts to move back into the region on Wednesday.

&&

.UPDATE...
Updated discussion is out. A winter storm watch was issued for
Madison/Gallatin counties, with the potential for heavy snow
around the Big Sky and West Yellowstone areas Sunday/Sunday night.
Otherwise, a mix of rain/snow will develop tonight over the
Rockies and spread eastward on Sunday. Additional winter weather
advisories will likely be issued later today for portions of
Central/Southwest MT. Overall snow amounts in the advisory area of
1 to 4 inches seem reasonable. Afternoon temperatures for today
look on track. Brusda

&&

.AVIATION...
Updated 1715Z.
VFR conditions will gradually give way to IFR conditions overnight
and on Sunday morning from west to east. Expect mountains to
become obscured overnight from west to east as rain/snow move into
the region. Widespread IFR conditions with mountains obscured is
expected for much of the region on Sunday. Brusda

&&

.PREV DISCUSSION...
/ISSUED 445 AM MST Sat Dec 2 2017/

Today through Monday...One more day of zonal westerly flow is
expected today. Expect more breezy winds at times, with continued
mild temperatures, and some mountain snow showers. Upper level low
moves inland across WA later today bringing a moist southerly flow
ahead of this system tonight. As a result scattered snow showers
will be possible from west to east. Models have shifted the
progression of this disturbance slightly southward, brining upper
low right over central Montana on Sunday. This combined with a
cold front could bring moderate snow to central and southern
portions on Sunday diminishing from northwest to southeast Sunday
night into Monday morning. This track would place the Rocky
Mountain Front, central MT, and southwestern MT in Winter Weather
Advisory level type snowfall, with near warning level across the
mountains of Gallatin and Madison Counties. Confidence is still
about moderate to almost high, given the inconsistent model runs.
Have decided to hold off on winter highlights for now, although
those impacted by moderate snowfall should stay tuned to the
latest forecasts and winter weather highlights. Dry northwest flow
should generally diminish the snow on Monday, although cannot
rule out a few scattered light snow showers in the morning. Mainly
dry and breezy conditons are then expected for the remainder of
the day. Temperatures as mentioned will be above normal today in
the 40s. Sunday's cold front will bring temperatures back to near
normal readings with highs only in the 30s and lows in the 20s.
Monday will also near to slightly below normal temperatures,
especially to areas that receive fresh snowfall. These areas could
see morning lows in the teens, with highs in the 20s and low 30s.
Anglin

Monday night through Saturday...The forecast solutions for this time
period continue to indicate a fairly dry period with very gradual
warming, but there is some disagreement toward the end of this
period.

Both the GFS and ECMWF forecast models indicate that an upper-level
ridge of high pressure will move from the far eastern Pacific Ocean
to the west coast of the U.S. and Canada Monday night into Tuesday.
The resulting northerly flow aloft with lingering moisture will keep
a chance of light mountain snow over the forecast area. This ridge
will then amplify along the Pacific coast through Thursday, which
will generally cut off the feed of moisture from the Pacific Ocean
and keep the area dry. Temperatures will remain near normal with
relatively light westerly downslope winds as the deepening upper-
level low pressure trough over the eastern U.S. keeps the coldest
air east of Montana. After Thursday, the forecast models continue
with similar solution differences as those indicated on last night's
model runs. The GFS keeps the amplified high pressure ridge intact
along the Pacific coast, while the ECMWF starts flattening the ridge
and shifting its axis more so into the Northern Rockies. This is
leading to the GFS running a bit cooler with regards to temperatures
than the ECMWF. Will stay with model blend guidance for now due to
this discrepancy. In addition, temperatures during this period will
be very dependent upon how much snow falls with Sunday's system. If
snow is widespread and is slow to melt, forecast temperatures may
need to be lowered somewhat from most of the model guidance.
Coulston

&&

.PRELIMINARY POINT TEMPS/POPS...
GTF  46  26  33  18 /  10  70  70  50
CTB  43  20  28  15 /   0  50  70  20
HLN  44  26  33  19 /  10  50  60  50
BZN  43  26  35  17 /  10  50  80  60
WEY  35  25  32   8 /  30  60  80  70
DLN  43  26  34  16 /  10  40  50  40
HVR  48  24  33  15 /   0  40  80  30
LWT  46  29  34  17 /  10  40  80  60

&&

.TFX WATCHES/WARNINGS/ADVISORIES...
Winter Storm Watch from Sunday morning through late Sunday night
Gallatin...Madison.

&&

http://www.weather.gov/greatfalls