Alert archive / Montana / Winter Storm Warnings in 2018

Winter Storm Warning 9, NWS Great Falls, MT

March 15, 2018

NWS Great Falls, MT issued this winter storm warning at Mar 15, 2018, 3:28 AM MDT. It took effect at Mar 15, 2018, 4:00 AM MDT. It was in force for 11 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Mar 15, 2018, 3:28 AM MDT (09:28 UTC)
In effect from
Mar 15, 2018, 4:00 AM MDT
Expired
Mar 15, 2018, 2:51 PM MDT
In force
11 hr
Issued by
NWS Great Falls, MT

The text

As transmitted.

042 
WWUS45 KTFX 150928
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
328 AM MDT Thu Mar 15 2018

MTZ048-049-160000-
/O.CAN.KTFX.WS.W.0008.000000T0000Z-180315T2100Z/
/O.NEW.KTFX.WS.W.0009.180315T1000Z-180316T0000Z/
Southern Rocky Mountain Front-Eastern Teton-
Including the following locations Bynum, Choteau, Augusta, 
Fairfield, and Dutton
328 AM MDT Thu Mar 15 2018

...WINTER STORM WARNING IN EFFECT UNTIL 6 PM MDT THIS EVENING...

* WHAT...Significant mixed precipitation expected. Minor ice
  accumulations expected prior to accumulating snow. Total snow 
  accumulations of 2 to 4 inches, with localized amounts up to 6 
  inches, are expected.

* WHERE...Southern Rocky Mountain Front and Eastern Teton.

* WHEN...Until 6 PM MDT this evening.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute. Be prepared for 
  significant reductions in visibility at times. Wet and 
  cold conditions produce extreme hazards to young livestock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. 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.

&&

$$

MTZ044-045-152100-
/O.CAN.KTFX.WS.W.0008.180315T1200Z-180316T0000Z/
/O.EXA.KTFX.WW.Y.0086.000000T0000Z-180315T2100Z/
Toole-Liberty-
Including the following locations Shelby, Sunburst, Chester, 
and Whitlash
328 AM MDT Thu Mar 15 2018

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 3 PM MDT THIS
AFTERNOON...
...WINTER STORM WARNING IS CANCELLED...

* WHAT...Mixed precipitation. Additional snow accumulations of 
  up to 2 inches and ice accumulations of a light glaze are 
  expected.

* WHERE...Toole and Liberty.

* WHEN...Until 3 PM MDT this afternoon.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the morning commute. Be prepared for reduced visibilities
  at times. Wet and cold conditions produce extreme hazards to 
  young livestock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Be prepared for
slippery 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.

&&

$$

MTZ012-013-050-152100-
/O.CAN.KTFX.WS.W.0008.000000T0000Z-180315T2100Z/
/O.EXA.KTFX.WW.Y.0086.000000T0000Z-180315T2100Z/
Cascade-Chouteau-Judith Basin-
Including the following locations Great Falls, Cascade, Belt, 
Kings Hill Pass, Fort Benton, Carter, Big Sandy, Raynesford, 
Stanford, and Hobson
328 AM MDT Thu Mar 15 2018

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 3 PM MDT THIS
AFTERNOON...
...WINTER STORM WARNING IS CANCELLED...

* WHAT...Mixed precipitation. Additional snow accumulations of 
  up to 2 inches, with localized amounts up to 5 inches, and ice 
  accumulations of a light glaze are expected.

* WHERE...Cascade, Chouteau and Judith Basin.

* WHEN...Until 3 PM MDT this afternoon.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the morning commute. Be prepared for reduced visibilities
  at times. Wet and cold conditions produce extreme hazards to
  young livestock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Be prepared for
slippery 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.

&&

$$

MTZ009-010-046-160000-
/O.EXT.KTFX.WS.W.0008.180315T1000Z-180316T0000Z/
Northern Rocky Mountain Front-Eastern Glacier-Eastern Pondera-
Including the following locations Logan Pass, Marias Pass, 
Browning, Heart Butte, Cut Bank, Brady, and Conrad
328 AM MDT Thu Mar 15 2018

...WINTER STORM WARNING NOW IN EFFECT UNTIL 6 PM MDT THIS
EVENING...

* WHAT...Significant mixed precipitation expected. Minor ice
  accumulations expected prior to accumulating snow. Total snow 
  accumulations of 3 to 5 inches, with localized amounts up to 10 
  inches in the mountains.

* WHERE...Northern Rocky Mountain Front, Eastern Glacier and 
  Eastern Pondera.

* WHEN...Until 6 PM MDT this evening.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the morning commute. Be prepared for reduced visibilities
  at times. Wet and cold conditions produce extreme hazards to
  young livestock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

MTZ014-052>054-152100-
/O.CON.KTFX.WS.W.0008.000000T0000Z-180315T2100Z/
/O.CON.KTFX.WW.Y.0086.000000T0000Z-180315T2100Z/
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
328 AM MDT Thu Mar 15 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 PM MDT THIS
AFTERNOON ABOVE 5500 FEET...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 3 PM MDT THIS
AFTERNOON BELOW 5500 FEET...

* WHAT...Snow Expected. Additional snow accumulations of 2 to 4
  inches, with localized amounts up to 6 inches, are expected. 

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

* WHEN...Until 3 PM MDT this afternoon.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute. Be prepared for 
  significant reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. 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.

&&

$$

MTZ008-015-055-151800-
/O.CON.KTFX.WW.Y.0086.000000T0000Z-180315T1800Z/
Beaverhead-Madison-Gallatin-
Including the following locations Big Hole Pass, Wisdom, Dillon, 
Chief Joseph Pass, Monida Pass, Wise River, Ennis, Norris Hill, 
Raynolds Pass, Twin Bridges, Virginia City, Bozeman, 
West Yellowstone, Battle Ridge Pass, Bozeman Pass, 
and Targhee Pass
328 AM MDT Thu Mar 15 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT
TODAY...

* WHAT...Snow. Additional snow accumulations of 1 to 3 inches, 
  with localized amounts up to 5 inches, are expected.

* WHERE...Beaverhead, Madison and Gallatin.

* WHEN...Until noon MDT today.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the morning commute. 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.

&&

$$

MTZ011-047-051-152100-
/O.CON.KTFX.WW.Y.0086.000000T0000Z-180315T2100Z/
Hill-Blaine-Fergus-
Including the following locations Havre, Rocky Boy, Rudyard, 
Chinook, Harlem, Hays, Lewistown, Winifred, Lewistown Divide, 
and Grass Range
328 AM MDT Thu Mar 15 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 3 PM MDT THIS
AFTERNOON...

* WHAT...Mixed precipitation. Additional snow accumulations of up
  to one inch, and light glaze of ice accumulation are expected.

* WHERE...Hill, Blaine and Fergus.

* WHEN...Until 3 PM MDT this afternoon.

* ADDITIONAL DETAILS...Plan on slippery road conditions, 
  including during the morning commute. Be prepared for reduced 
  visibilities at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Be prepared for
slippery 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
3 follow-up statements
436 
WWUS45 KTFX 151432
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
832 AM MDT Thu Mar 15 2018

MTZ014-052>054-152100-
/O.CON.KTFX.WS.W.0008.000000T0000Z-180315T2100Z/
/O.CON.KTFX.WW.Y.0086.000000T0000Z-180315T2100Z/
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
832 AM MDT Thu Mar 15 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 PM MDT THIS
AFTERNOON ABOVE 5500 FEET...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 3 PM MDT THIS
AFTERNOON BELOW 5500 FEET...

* WHAT...Snow Expected. Additional snow accumulations of 1 to 3
  inches, with localized amounts up to 6 inches, are expected..

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

* WHEN...Until 3 PM MDT this afternoon.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute. Be prepared for 
  significant reductions in visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. 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.

&&

$$

MTZ048-049-160000-
/O.CON.KTFX.WS.W.0009.000000T0000Z-180316T0000Z/
Southern Rocky Mountain Front-Eastern Teton-
Including the following locations Bynum, Choteau, Augusta, 
Fairfield, and Dutton
832 AM MDT Thu Mar 15 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...

* WHAT...Heavy snow and mixed precipitation expected. Minor ice
  accumulations expected prior to accumulating snow. Additional 
  snow accumulations of 2 to 4 inches, with localized amounts up 
  to 6 inches, are expected.

* WHERE...Southern Rocky Mountain Front and Eastern Teton.

* WHEN...Until 6 PM MDT this evening.

* ADDITIONAL DETAILS...Plan on difficult travel conditions, 
  including during the morning commute. Be prepared for 
  significant reductions in visibility at times. Wet and 
  cold conditions produce extreme hazards to young livestock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. 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.

&&

$$

MTZ009-010-046-160000-
/O.CON.KTFX.WS.W.0008.000000T0000Z-180316T0000Z/
Northern Rocky Mountain Front-Eastern Glacier-Eastern Pondera-
Including the following locations Logan Pass, Marias Pass, 
Browning, Heart Butte, Cut Bank, Brady, and Conrad
832 AM MDT Thu Mar 15 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...

* WHAT...Heavy mixed precipitation. Minor ice accumulations
  expected prior to accumulating snow. Additional snow 
  accumulations of 2 to 4 inches, with localized amounts up to 8 
  inches in the mountains, are expected.

* WHERE...Northern Rocky Mountain Front, Eastern Glacier and 
  Eastern Pondera.

* WHEN...Until 6 PM MDT this evening.

* ADDITIONAL DETAILS...Plan on difficult travel conditions,
  including during the morning commute. Be prepared for
  significant reductions in visibility at times. Wet and cold
  conditions produce extreme hazards to young livestock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

MTZ008-015-055-151800-
/O.CON.KTFX.WW.Y.0086.000000T0000Z-180315T1800Z/
Beaverhead-Madison-Gallatin-
Including the following locations Big Hole Pass, Wisdom, Dillon, 
Chief Joseph Pass, Monida Pass, Wise River, Ennis, Norris Hill, 
Raynolds Pass, Twin Bridges, Virginia City, Bozeman, 
West Yellowstone, Battle Ridge Pass, Bozeman Pass, 
and Targhee Pass
832 AM MDT Thu Mar 15 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT
TODAY...

* WHAT...Snow. Additional snow accumulations of up to two inches,
  with localized amounts up to 2 to 4 are expected.

* WHERE...Beaverhead, Madison and Gallatin.

* WHEN...Until noon MDT today.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the morning commute. 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.

&&

$$

MTZ011>013-044-045-047-050-051-152100-
/O.CON.KTFX.WW.Y.0086.000000T0000Z-180315T2100Z/
Hill-Cascade-Chouteau-Toole-Liberty-Blaine-Judith Basin-Fergus-
Including the following locations Havre, Rocky Boy, Rudyard, 
Great Falls, Cascade, Belt, Kings Hill Pass, Fort Benton, Carter,
Big Sandy, Shelby, Sunburst, Chester, Whitlash, Chinook, Harlem, 
Hays, Raynesford, Stanford, Hobson, Lewistown, Winifred, 
Lewistown Divide, and Grass Range
832 AM MDT Thu Mar 15 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 3 PM MDT THIS
AFTERNOON...

* WHAT...Mixed precipitation. Additional snow accumulations of up
  to two inches, with localized amounts up to 4 inches, and ice 
  accumulations of a light glaze are expected.

* WHERE...Portions of central and north central Montana.

* WHEN...Until 3 PM MDT this afternoon.

* ADDITIONAL DETAILS...Plan on slippery road conditions, including
  during the morning commute. Be prepared for reduced visibilities
  at times. Wet and cold conditions produce extreme hazards to
  young livestock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Be prepared for
slippery 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
282 
WWUS45 KTFX 151745
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
1145 AM MDT Thu Mar 15 2018

MTZ014-052>054-152100-
/O.CON.KTFX.WS.W.0008.000000T0000Z-180315T2100Z/
/O.CON.KTFX.WW.Y.0086.000000T0000Z-180315T2100Z/
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
1145 AM MDT Thu Mar 15 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 PM MDT THIS
AFTERNOON ABOVE 5500 FEET...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 3 PM MDT THIS
AFTERNOON BELOW 5500 FEET...

* WHAT...Snow Expected. Additional snow accumulations of 1 to 3
  inches, with localized amounts up to 6 inches, are expected.

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

* WHEN...For the Winter Storm Warning, until 3 PM MDT this 
  afternoon. For the Winter Weather Advisory, until 3 PM MDT 
  this afternoon.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Be
  prepared for significant reductions in visibility at times. Wet
  and cold conditions produce extreme hazards to young livestock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. 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.

&&

$$

MTZ048-049-160000-
/O.CON.KTFX.WS.W.0009.000000T0000Z-180316T0000Z/
Southern Rocky Mountain Front-Eastern Teton-
Including the following locations Bynum, Choteau, Augusta, 
Fairfield, and Dutton
1145 AM MDT Thu Mar 15 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...

* WHAT...Heavy snow and mixed precipitation expected. Minor ice
  accumulations expected prior to accumulating snow. Additional 
  snow accumulations of 2 to 4 inches, with localized amounts up 
  to 6 inches, are expected.

* WHERE...Southern Rocky Mountain Front and Eastern Teton.

* WHEN...Until 6 PM MDT this evening.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Be
  prepared for significant reductions in visibility at times. Wet
  and cold conditions produce extreme hazards to young livestock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. 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.

&&

$$

MTZ009-010-046-160000-
/O.CON.KTFX.WS.W.0008.000000T0000Z-180316T0000Z/
Northern Rocky Mountain Front-Eastern Glacier-Eastern Pondera-
Including the following locations Logan Pass, Marias Pass, 
Browning, Heart Butte, Cut Bank, Brady, and Conrad
1145 AM MDT Thu Mar 15 2018

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS
EVENING...

* WHAT...Heavy mixed precipitation. Minor ice accumulations
  expected prior to accumulating snow. Additional snow 
  accumulations of 2 to 4 inches, with localized amounts up to 8 
  inches in the mountains, are expected.

* WHERE...Northern Rocky Mountain Front, Eastern Glacier and 
  Eastern Pondera.

* WHEN...Until 6 PM MDT this evening.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Be
  prepared for significant reductions in visibility at times. Wet
  and cold conditions produce extreme hazards to young livestock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions for the state you are calling from can be
obtained by calling 5 1 1.

&&

$$

MTZ008-015-055-152100-
/O.EXT.KTFX.WW.Y.0086.000000T0000Z-180315T2100Z/
Beaverhead-Madison-Gallatin-
Including the following locations Big Hole Pass, Wisdom, Dillon, 
Chief Joseph Pass, Monida Pass, Wise River, Ennis, Norris Hill, 
Raynolds Pass, Twin Bridges, Virginia City, Bozeman, 
West Yellowstone, Battle Ridge Pass, Bozeman Pass, 
and Targhee Pass
1145 AM MDT Thu Mar 15 2018

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 3 PM MDT THIS
AFTERNOON...

* WHAT...Snow. Additional snow accumulations of up to 2 inches, 
  with localized amounts up to 4 inches, are expected.

* WHERE...Beaverhead, Madison and Gallatin.

* WHEN...Until 3 PM MDT this afternoon.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Be
  prepared for reduced visibilities at times. Wet and cold
  conditions produce extreme hazards to young livestock.

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.

&&

$$

MTZ011>013-044-045-047-050-051-152100-
/O.CON.KTFX.WW.Y.0086.000000T0000Z-180315T2100Z/
Hill-Cascade-Chouteau-Toole-Liberty-Blaine-Judith Basin-Fergus-
Including the following locations Havre, Rocky Boy, Rudyard, 
Great Falls, Cascade, Belt, Kings Hill Pass, Fort Benton, Carter,
Big Sandy, Shelby, Sunburst, Chester, Whitlash, Chinook, Harlem, 
Hays, Raynesford, Stanford, Hobson, Lewistown, Winifred, 
Lewistown Divide, and Grass Range
1145 AM MDT Thu Mar 15 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 3 PM MDT THIS
AFTERNOON...

* WHAT...Mixed precipitation. Additional snow accumulations of up
  to 2 inches, with localized amounts up to 4 inches, and ice 
  accumulations of a light glaze, are expected.

* WHERE...Portions of central and north central Montana.

* WHEN...Until 3 PM MDT this afternoon.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Be
  prepared for reduced visibilities at times. Wet and cold
  conditions produce extreme hazards to young livestock.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Be prepared for
slippery 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
380 
WWUS45 KTFX 152051
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
251 PM MDT Thu Mar 15 2018

MTZ014-052>054-152200-
/O.CAN.KTFX.WS.W.0008.000000T0000Z-180315T2100Z/
/O.CAN.KTFX.WW.Y.0086.000000T0000Z-180315T2100Z/
Central and Southern Lewis and Clark-Jefferson-Broadwater-Meagher-
251 PM MDT Thu Mar 15 2018

...WINTER STORM WARNING IS CANCELLED...
...WINTER WEATHER ADVISORY IS CANCELLED...

Areas of heavy snowfall have ended. Thus, the winter storm 
warning has been cancelled. Some light remnant areas of snowfall 
is possible, but should not cause any additional impacts at this 
time. 

$$

MTZ048-049-152200-
/O.CAN.KTFX.WS.W.0009.000000T0000Z-180316T0000Z/
Southern Rocky Mountain Front-Eastern Teton-
251 PM MDT Thu Mar 15 2018

...WINTER STORM WARNING IS CANCELLED...

Areas of heavy snowfall have ended. Thus, the winter storm 
warning has been cancelled. Some light remnant areas of snowfall 
is possible, but should not cause any additional impacts at this 
time. 

$$

MTZ009-010-046-152200-
/O.CAN.KTFX.WS.W.0008.000000T0000Z-180316T0000Z/
Northern Rocky Mountain Front-Eastern Glacier-Eastern Pondera-
251 PM MDT Thu Mar 15 2018

...WINTER STORM WARNING IS CANCELLED...

Areas of heavy snowfall have ended. Thus, the winter storm 
warning has been cancelled. Some light remnant areas of snowfall 
is possible, but should not cause any additional impacts at this 
time. 

$$

MTZ008-011>013-015-044-045-047-050-051-055-152200-
/O.CAN.KTFX.WW.Y.0086.000000T0000Z-180315T2100Z/
Beaverhead-Hill-Cascade-Chouteau-Madison-Toole-Liberty-Blaine-
Judith Basin-Fergus-Gallatin-
251 PM MDT Thu Mar 15 2018

...WINTER WEATHER ADVISORY IS CANCELLED...

Areas of heavy snowfall have ended. Thus, the winter storm 
warning has been cancelled. Some light remnant areas of snowfall 
is possible, but should not cause any additional impacts at this 
time. 

$$

http://www.weather.gov/greatfalls

What forecasters said that day

The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Great Falls, MT wrote its last area forecast discussion before this winter storm warning went out at Mar 14, 11:45 PM MDT, 3 hours 43 minutes earlier.

Area forecast discussion, Mar 14, 11:45 PM MDT, 3 hours 43 minutes before
Area Forecast Discussion
National Weather Service Great Falls MT
1145 PM MDT Wed Mar 14 2018

Aviation Section Updated.

.UPDATE...
1015 PM Update...Freezing rain is being reported in the Dillon
area. Ice accumulations up to a tenth of an inch possible. Up to
10 inches of snow possible in the mountains of Southwest MT. Thus
a winter weather advisory issued for Southwest MT until Noon
Thursday. Brusda

830 PM Update...Only update this evening was to add mention of
patchy freezing fog for Hill and Blaine Counties until the
widespread clouds and precipitation move into that area.

Otherwise, the current forecast appears to be on track, as
precipitation has moved into the area west of Interstate 15. As
more moisture advects into the area, precipitation will spread
further east across the area overnight. A wintry mix of rain,
freezing rain, sleet, and snow will develop over the plains of
north central Montana through midnight, but it will then
transition over to all snow throughout the night as cooler air
aloft moves in. It is still looking like a messy pattern with
widespread snow accumulation through tomorrow.
Coulston

&&

.SYNOPSIS...

An upper level ridge will move eastward tonight, as a strong
upper level disturbance moves into the region. Expect rain and
snow showers to develop late this afternoon over Southwest MT and
then gradually move northeastward and spread into Central MT
tonight. Cold air will begin a change over to snow...and possibly
some freezing rain or sleet overnight tonight into Thursday
morning. Rest of Thursday, expect this colder air keep filtering
into the region, continuing chances for freezing rain, sleet or
snow over much of Northern and Central MT. Moderate snow
accumulations are possible.

&&

.AVIATION...
Updated 0545Z.

VFR conditions for North-central MT terminals will decline through
early morning with areas of mixed precipitation moving from south to
north. The freezing rain potential now appears most likely broadly
along a line from KGTF to KCTB, with a few hundredths of an inch of
icing possible from midnight through around 05z. Precipitation
transitions to all snow by 12Z, potentially becoming moderate to at
times heavy from KHLN to KGTF to KCTB through 21Z. Conditions
gradually improve from south to north Thursday afternoon and
evening, with snow changing back to rain in some areas before
ending. PN

&&

.HYDROLOGY...
Updated 300 PM.

The flood advisory will continue for portions of Southwest MT, as
minor flooding continues to be reported via emergency managers.
Based on local emergency manager feedback, areas that are not
flooding could begin to see flooding during the afternoon and
evening hours over the next few days.

Rain/snow will move into the region this evening through tonight.
Overall liquid rainfall should be less than 0.25 inches in most
areas, thus significant new flooding issues are not anticipated at
this time...however...rain may bring some minor flooding or
ponding issues. The remainder of the week will see slightly cooler
more normal temperatures...possibly decreasing the threat of new
flooding issues. Anglin/Brusda

&&

.PREV DISCUSSION...
/ISSUED 300 PM MDT Wed Mar 14 2018/
Tonight through Thursday...Big changes lie ahead in the forecast
with the return of winter weather for the entire area beginning
tonight. The large and dominant upper-level low continues to pump
increasing Pacific moisture across the region this evening and
tonight. Within the large counter-clockwise flow around the low,
most short-range guidance has finally come to an agreement with
the projection of an embedded shortwave trough rotating, and
amplifying across the state of Montana late tonight and early
tomorrow. Because of this, given increasing dynamic support for
low-level ascent, coupled with sufficient moisture aloft, snow
will likely develop and expand across the area late tonight
through Thursday morning. Details still remain to be seen as far
as developing mesoscale features with this system, but it is
important to note that where any mesoscale banding occurs, that
there could be variations in snowfall amounts across the region.
It is still looking likely that higher elevations primarily
across central areas and along the Divide will be impacted by
significant totals of heavy wet snow that may likely lead to
impacts with travel beginning early tomorrow and lasting through
the day. Cities in lower elevations including Great Falls and
Helena also have the potential to experience heavy, wet snow
impacting the morning commute Thursday morning. The next item of
concern will be the potential for mixed precipitation in the
onset of the precipitation late tonight. With the aforementioned
shortwave swinging through the state, ample low-level flow
upwards of 50kts from the southeast will help pump temperatures
above freezing in the low-levels into eastern areas of the CWA.
With this nose of warmer temperatures aloft, periods of freezing
rain and sleet look likely which may lead to some impacts,
primarily from Great Falls to Havre, including parts of Highway
87 and Highway 2 where some impacts to travel may be likely.
Otherwise, this wintry mess will quickly attempt to depart the
area to the north by Thursday afternoon and evening, with a small
drying period possible Thursday night and into Friday morning.
Stay tuned for more updates. KLG

For Thursday night through Sunday...most models indicate a rather
unsettled period of weather with periods of mostly snow falling.
Overall during the day on Saturday looks to be the one period
where we should have a break in the precipitation. Overall daily
snowfall accumulations of 1 to 3 inches seem possible in most
areas. Again, temperatures will remain below normal.

For Monday through Wednesday, the GFS/EC have different solutions
for the region, as the EC is quite a bit colder, with periods of
snow, especially over North Central MT. The GFS is not quite as
cold/snowy. Overall, leaned towards a blend for Mon thru Wed, but
confidence is low at this time for this period. Brusda

&&

.PRELIMINARY POINT TEMPS/POPS...
GTF  26  39  21  36 /  90 100  10  30
CTB  23  33  16  33 /  80  90  20  20
HLN  31  41  26  41 /  90  80  20  30
BZN  31  43  24  42 /  90  80  30  30
WEY  26  36  18  34 /  80  60  40  30
DLN  28  39  21  39 /  90  70  40  20
HVR  18  30  18  32 /  50  60  10  30
LWT  27  39  24  37 /  70  70  20  60

&&

.TFX WATCHES/WARNINGS/ADVISORIES...
Winter Weather Advisory from 3 AM to 3 PM MDT Thursday below
5500 feet for Broadwater...Central and Southern Lewis and
Clark...Jefferson...Meagher.

Winter Storm Warning from 3 AM to 3 PM MDT Thursday above 5500
feet for Broadwater...Central and Southern Lewis and Clark...
Jefferson...Meagher.

Winter Storm Warning from 6 AM to 6 PM MDT Thursday Eastern
Glacier...Eastern Pondera...Liberty...Northern Rocky Mountain
Front...Toole.

Winter Weather Advisory until noon MDT Thursday Beaverhead...
Gallatin...Madison.

Winter Storm Warning from 3 AM to 3 PM MDT Thursday Cascade...
Chouteau...Eastern Teton...Judith Basin...Southern Rocky
Mountain Front.

Winter Weather Advisory from 3 AM to 3 PM MDT Thursday Blaine...
Fergus...Hill.

&&

http://www.weather.gov/greatfalls

In the hours before

Local storm report, Mar 15, 3:09 AM MDT, 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREAT FALLS MT
309 AM MDT THU MAR 15 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0200 AM     SNOW             ALBRO LAKE SNOTEL       45.60N 111.96W
03/15/2018  M5.0 INCH        MADISON            MT   MESONET

            MESONET STATION ABRM8, ALBRO LAKE SNOTEL.
            THE DURATION OF THE SNOW EVENT WAS 12 HOURS.

0200 AM     SNOW             BEAVER CREEK SNOTEL     44.95N 111.36W
03/15/2018  M3.0 INCH        GALLATIN           MT   MESONET

            MESONET STATION BEVM8, BEAVER CREEK SNOTEL.
            THE DURATION OF THE SNOW EVENT WAS 12 HOURS.

0200 AM     SNOW             CARROT BASIN SNOTEL     44.96N 111.29W
03/15/2018  M6.0 INCH        GALLATIN           MT   MESONET

            MESONET STATION CRRM8, CARROT BASIN SNOTEL.
            THE DURATION OF THE SNOW EVENT WAS 12 HOURS.

0200 AM     SNOW             TIZER BASIN SNOTEL      46.35N 111.85W
03/15/2018  M3.0 INCH        JEFFERSON          MT   MESONET

            MESONET STATION TIBM8, TIZER BASIN SNOTEL.
            THE DURATION OF THE SNOW EVENT WAS 12 HOURS.

0200 AM     SNOW             LAKEVIEW RIDGE SNOTEL   44.59N 111.82W
03/15/2018  M3.0 INCH        BEAVERHEAD         MT   MESONET

            MESONET STATION LVRM8, LAKEVIEW RIDGE
            SNOTEL. THE DURATION OF THE SNOW EVENT WAS
            12 HOURS.

0200 AM     SNOW             TEPEE CREEK SNOTEL      44.79N 111.71W
03/15/2018  M3.0 INCH        MADISON            MT   MESONET

            MESONET STATION TPEM8, TEPEE CREEK SNOTEL.
            THE DURATION OF THE SNOW EVENT WAS 12 HOURS.

&&

Nearby

Winter Storm Warnings in Montana, 2018Every winter storm warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.