Alert archive / Montana / Winter Storm Warnings in 2021

Winter Storm Warning 3, NWS Great Falls, MT

May 18, 2021

NWS Great Falls, MT issued this winter storm warning at May 18, 2021, 2:36 PM MDT. It took effect at May 19, 2021, 7:19 PM MDT. It was in force for 38 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
May 18, 2021, 2:36 PM MDT (20:36 UTC)
In effect from
May 19, 2021, 7:19 PM MDT
Expired
May 21, 2021, 9:00 AM MDT
In force
38 hr
Issued by
NWS Great Falls, MT

The text

As transmitted.

033 
WWUS45 KTFX 182036
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
236 PM MDT Tue May 18 2021

MTZ009-048-191100-
/O.UPG.KTFX.WS.A.0004.210520T0000Z-210522T0000Z/
/O.NEW.KTFX.WS.W.0003.210520T0300Z-210521T1500Z/
Northern Rocky Mountain Front-Southern Rocky Mountain Front-
Including the cities of Marias Pass, Bynum, Choteau, Browning,
Heart Butte, Logan Pass, and Augusta
236 PM MDT Tue May 18 2021

...WINTER STORM WARNING IN EFFECT
FROM 9 PM WEDNESDAY TO 9 AM MDT FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 8 
  inches at lower elevations, and 8 to 15 inches in the mountains. 
  Isolated higher amounts.

* WHERE...Northern Rocky Mountain Front and Southern Rocky Mountain 
  Front.

* WHEN...From 9 PM Wednesday to 9 AM MDT Friday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous.

* ADDITIONAL DETAILS...Visibility will be reduced below one half 
  mile at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Do not touch downed lines and report any power outages to your 
electric company. Travel is highly discouraged due to slick roadways 
and the possibility of downed trees and power lines.

&&

$$

MTZ014-191100-
/O.UPG.KTFX.WS.A.0004.210520T0000Z-210522T0000Z/
/O.NEW.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Central and Southern Lewis and Clark-
Including the cities of Rogers Pass, MacDonald Pass, Lincoln, and
Flesher Pass
236 PM MDT Tue May 18 2021

...WINTER WEATHER ADVISORY IN EFFECT
FROM 9 PM WEDNESDAY TO 9 AM MDT FRIDAY...

* WHAT...Snow expected. Total snow accumulations 1 to 4 inches at 
  lower elevations, and 5 to 10 inches in the mountains.

* WHERE...Central and Southern Lewis and Clark County.

* WHEN...From 9 PM Wednesday to 9 AM MDT Friday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving.

Do not touch downed lines and report any power outages to your 
electric company.

&&

$$

MTZ010-044>046-049-191100-
/O.NEW.KTFX.WW.Y.0034.210520T0300Z-210520T1500Z/
Eastern Glacier-Toole-Liberty-Eastern Pondera-Eastern Teton-
Including the cities of Brady, Shelby, Whitlash, Fairfield, Cut
Bank, Dutton, Chester, Conrad, and Sunburst
236 PM MDT Tue May 18 2021

...WINTER WEATHER ADVISORY IN EFFECT
FROM 9 PM WEDNESDAY TO 9 AM MDT THURSDAY...

* WHAT...Wet snow expected. Total snow accumulations 3 to 6 inches.

* WHERE...Eastern Glacier, Eastern Pondera, Eastern Teton, Liberty 
  and Toole Counties.

* WHEN...From 9 PM Wednesday to 9 AM MDT Thursday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous.

* ADDITIONAL DETAILS...Visibility will be reduced below one half 
  mile at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving.

Do not touch downed lines and report any power outages to your 
electric company.

&&

$$

MTZ012-050-191100-
/O.NEW.KTFX.WW.Y.0034.210520T0300Z-210520T1500Z/
Cascade-Judith Basin-
Including the cities of Raynesford, Stanford, Cascade, Great
Falls, Belt, and Hobson
236 PM MDT Tue May 18 2021

...WINTER WEATHER ADVISORY IN EFFECT
FROM 9 PM WEDNESDAY TO 9 AM MDT THURSDAY...

* WHAT...Wet snow expected. Total snow accumulations 1 to 3 inches 
  at lower elevations, and 4 to 8 inches in the mountains.

* WHERE...Cascade and Judith Basin Counties.

* WHEN...From 9 PM Wednesday to 9 AM MDT Thursday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving.

&&

$$

MTZ052-191100-
/O.NEW.KTFX.WW.Y.0034.210520T0300Z-210520T1500Z/
Jefferson-
Including the cities of Boulder, Elk Park Pass, Boulder Hill,
Montana City, and Whitehall
236 PM MDT Tue May 18 2021

...WINTER WEATHER ADVISORY IN EFFECT
FROM 9 PM WEDNESDAY TO 9 AM MDT THURSDAY...

* WHAT...Wet snow expected. Total snow accumulations 1 to 3 inches. 
  Isolated higher amounts in the mountains.

* WHERE...Jefferson County.

* WHEN...From 9 PM Wednesday to 9 AM MDT Thursday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving.

&&

$$
11 follow-up statements
689 
WWUS45 KTFX 182041
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
241 PM MDT Tue May 18 2021

MTZ009-048-191100-
/O.CON.KTFX.WS.W.0003.210520T0300Z-210521T1500Z/
Northern Rocky Mountain Front-Southern Rocky Mountain Front-
Including the cities of Marias Pass, Bynum, Choteau, Browning,
Heart Butte, Logan Pass, and Augusta
241 PM MDT Tue May 18 2021

...WINTER STORM WARNING REMAINS IN EFFECT
FROM 9 PM WEDNESDAY TO 9 AM MDT FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 8 
  inches at lower elevations, and 8 to 15 inches in the mountains. 
  Isolated higher amounts.

* WHERE...Northern Rocky Mountain Front and Southern Rocky Mountain 
  Front.

* WHEN...From 9 PM Wednesday to 9 AM MDT Friday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous.

* ADDITIONAL DETAILS...Visibility will be reduced below one half 
  mile at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Do not touch downed lines and report any power outages to your 
electric company. Travel is highly discouraged due to slick roadways 
and the possibility of downed trees and power lines.

&&

$$

MTZ010-044>046-049-191100-
/O.EXT.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Eastern Glacier-Toole-Liberty-Eastern Pondera-Eastern Teton-
Including the cities of Brady, Shelby, Whitlash, Fairfield, Cut
Bank, Dutton, Chester, Conrad, and Sunburst
241 PM MDT Tue May 18 2021

...WINTER WEATHER ADVISORY NOW IN EFFECT
FROM 9 PM WEDNESDAY TO 9 AM MDT FRIDAY...

* WHAT...Wet snow expected. Total snow accumulations 3 to 6 inches.

* WHERE...Eastern Glacier, Eastern Pondera, Eastern Teton, Liberty 
  and Toole Counties.

* WHEN...From 9 PM Wednesday to 9 AM MDT Friday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous.

* ADDITIONAL DETAILS...Visibility will be reduced below one half 
  mile at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving.

Do not touch downed lines and report any power outages to your 
electric company.

&&

$$

MTZ012-050-191100-
/O.EXT.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Cascade-Judith Basin-
Including the cities of Raynesford, Stanford, Cascade, Great
Falls, Belt, and Hobson
241 PM MDT Tue May 18 2021

...WINTER WEATHER ADVISORY NOW IN EFFECT
FROM 9 PM WEDNESDAY TO 9 AM MDT FRIDAY...

* WHAT...Wet snow expected. Total snow accumulations 1 to 3 inches 
  at lower elevations, and 4 to 8 inches in the mountains.

* WHERE...Cascade and Judith Basin Counties.

* WHEN...From 9 PM Wednesday to 9 AM MDT Friday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving.

&&

$$

MTZ052-191100-
/O.EXT.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Jefferson-
Including the cities of Boulder, Elk Park Pass, Boulder Hill,
Montana City, and Whitehall
241 PM MDT Tue May 18 2021

...WINTER WEATHER ADVISORY NOW IN EFFECT
FROM 9 PM WEDNESDAY TO 9 AM MDT FRIDAY...

* WHAT...Wet snow expected. Total snow accumulations 1 to 3 inches. 
  Isolated higher amounts in the mountains.

* WHERE...Jefferson County.

* WHEN...From 9 PM Wednesday to 9 AM MDT Friday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving.

&&

$$

MTZ014-191100-
/O.CON.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Central and Southern Lewis and Clark-
Including the cities of Rogers Pass, MacDonald Pass, Lincoln, and
Flesher Pass
241 PM MDT Tue May 18 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT
FROM 9 PM WEDNESDAY TO 9 AM MDT FRIDAY...

* WHAT...Snow expected. Total snow accumulations 1 to 4 inches at 
  lower elevations, and 5 to 10 inches in the mountains.

* WHERE...Central and Southern Lewis and Clark County.

* WHEN...From 9 PM Wednesday to 9 AM MDT Friday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving.

Do not touch downed lines and report any power outages to your 
electric company.

&&

$$
546 
WWUS45 KTFX 190241
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
841 PM MDT Tue May 18 2021

MTZ009-048-191500-
/O.CON.KTFX.WS.W.0003.210520T0300Z-210521T1500Z/
Northern Rocky Mountain Front-Southern Rocky Mountain Front-
Including the cities of Marias Pass, Bynum, Choteau, Browning,
Heart Butte, Logan Pass, and Augusta
841 PM MDT Tue May 18 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 9 PM WEDNESDAY TO 9 
AM MDT FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 9 
  inches at lower elevations, and 10 to 20 inches in the mountains. 
  Isolated higher amounts.

* WHERE...Northern Rocky Mountain Front and Southern Rocky Mountain 
  Front.

* WHEN...From 9 PM Wednesday to 9 AM MDT Friday.

* IMPACTS...The wet and heavy nature of the snow could cause 
  isolated power outages and damage trees or vegetation that have 
  fully leaved out. Agricultural interest, especially those with 
  newborn or young livestock, could be extremely impacted due to the 
  duration of wet conditions and cold temperatures. Roads, 
  especially bridges and overpasses, will likely become slick and 
  hazardous. The wet and raw conditions could lead to hypothermia in 
  the backcountry if not adequately prepared.

* ADDITIONAL DETAILS...Visibility will be reduced below one half 
  mile at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Do not touch downed lines and report any power outages to your 
electric company. Travel is highly discouraged due to slick roadways 
and the possibility of downed trees and power lines.

&&

$$

MTZ010-044>046-049-191500-
/O.CON.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Eastern Glacier-Toole-Liberty-Eastern Pondera-Eastern Teton-
Including the cities of Brady, Shelby, Whitlash, Fairfield, Cut
Bank, Dutton, Chester, Conrad, and Sunburst
841 PM MDT Tue May 18 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 9 PM WEDNESDAY TO 
9 AM MDT FRIDAY...

* WHAT...Wet snow expected. Total snow accumulations 3 to 6 inches.

* WHERE...Eastern Glacier, Eastern Pondera, Eastern Teton, Liberty 
  and Toole Counties.

* WHEN...From 9 PM Wednesday to 9 AM MDT Friday.

* IMPACTS...The wet and heavy nature of the snow could cause 
  isolated power outages and damage trees or vegetation that have 
  fully leaved out. Agricultural interest, especially those with 
  newborn or young livestock, could be extremely impacted due to the 
  duration of wet conditions and cold temperatures. Roads, 
  especially bridges and overpasses, will likely become slick and 
  hazardous. The wet and raw conditions could lead to hypothermia in 
  the backcountry if not adequately prepared.

* ADDITIONAL DETAILS...Visibility will be reduced below one half 
  mile at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving.

Do not touch downed lines and report any power outages to your 
electric company.

&&

$$

MTZ012-050-191500-
/O.CON.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Cascade-Judith Basin-
Including the cities of Raynesford, Stanford, Cascade, Great
Falls, Belt, and Hobson
841 PM MDT Tue May 18 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 9 PM WEDNESDAY TO 
9 AM MDT FRIDAY...

* WHAT...Wet snow expected. Total snow accumulations 1 to 3 inches 
  at lower elevations, and 4 to 8 inches in the mountains.

* WHERE...Cascade and Judith Basin Counties.

* WHEN...From 9 PM Wednesday to 9 AM MDT Friday.

* IMPACTS...Roads, especially bridges and overpasses, will likely 
  become slick and hazardous. The wet and raw conditions could lead 
  to hypothermia in the backcountry if not adequately prepared.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving.

&&

$$

MTZ014-191500-
/O.CON.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Central and Southern Lewis and Clark-
Including the cities of Rogers Pass, MacDonald Pass, Lincoln, and
Flesher Pass
841 PM MDT Tue May 18 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 9 PM WEDNESDAY TO 
9 AM MDT FRIDAY...

* WHAT...Snow expected. Total snow accumulations 1 to 4 inches at 
  lower elevations, and 5 to 10 inches in the mountains. Isolated 
  amounts approaching 16 inches near Rogers Pass are possible.

* WHERE...Central and Southern Lewis and Clark County.

* WHEN...From 9 PM Wednesday to 9 AM MDT Friday.

* IMPACTS...The wet and heavy nature of the snow could cause 
  isolated power outages and damage trees or vegetation that have 
  fully leaved out. Agricultural interest, especially those with 
  newborn or young livestock, could be extremely impacted due to the 
  duration of wet conditions and cold temperatures. Roads, 
  especially bridges and overpasses, will likely become slick and 
  hazardous. The wet and raw conditions could lead to hypothermia in 
  the backcountry if not adequately prepared.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving.

Do not touch downed lines and report any power outages to your 
electric company.

&&

$$

MTZ052-191500-
/O.CON.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Jefferson-
Including the cities of Boulder, Elk Park Pass, Boulder Hill,
Montana City, and Whitehall
841 PM MDT Tue May 18 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 9 PM WEDNESDAY TO 
9 AM MDT FRIDAY...

* WHAT...Wet snow expected. Total snow accumulations 1 to 4 inches. 
  Isolated higher amounts in the mountains.

* WHERE...Jefferson County.

* WHEN...From 9 PM Wednesday to 9 AM MDT Friday.

* IMPACTS...Roads, especially bridges and overpasses, will likely 
  become slick and hazardous. The wet and raw conditions could lead 
  to hypothermia in the backcountry if not adequately prepared.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving.

&&

$$

Moldan
589 
WWUS45 KTFX 190830
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
230 AM MDT Wed May 19 2021

MTZ009-048-192200-
/O.CON.KTFX.WS.W.0003.210520T0300Z-210521T1500Z/
Northern Rocky Mountain Front-Southern Rocky Mountain Front-
Including the cities of Marias Pass, Bynum, Choteau, Browning,
Heart Butte, Logan Pass, and Augusta
230 AM MDT Wed May 19 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 
9 AM MDT FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 9 
  inches at lower elevations. In the mountains, 10 to 20 inches of 
  snow are expected, with isolated higher amounts.

* WHERE...Northern Rocky Mountain Front and Southern Rocky Mountain 
  Front.

* WHEN...From 9 PM this evening to 9 AM MDT Friday.

* IMPACTS...The wet and heavy nature of the snow could cause 
  isolated power outages and damage trees or vegetation that have 
  fully leaved out. Agricultural interest, especially those with 
  newborn or young livestock, could be extremely impacted due to the 
  duration of wet conditions and cold temperatures. Roads, 
  especially bridges and overpasses, will likely become slick and 
  hazardous. The wet and raw conditions could lead to hypothermia in 
  the backcountry if not adequately prepared.

* ADDITIONAL DETAILS...Visibility will be reduced below one half 
  mile at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Do not touch downed lines and report any power outages to your 
electric company. Travel is highly discouraged due to slick roadways 
and the possibility of downed trees and power lines.

&&

$$

MTZ010-044>046-049-192200-
/O.CON.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Eastern Glacier-Toole-Liberty-Eastern Pondera-Eastern Teton-
Including the cities of Brady, Shelby, Whitlash, Fairfield, Cut
Bank, Dutton, Chester, Conrad, and Sunburst
230 AM MDT Wed May 19 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING 
TO 9 AM MDT FRIDAY...

* WHAT...Snow expected. Total snow accumulations of 1 to 8 inches.

* WHERE...Eastern Glacier, Eastern Pondera, Eastern Teton, Liberty 
  and Toole Counties.

* WHEN...From 9 PM this evening to 9 AM MDT Friday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous.

* ADDITIONAL DETAILS...The heavy, wet nature of the snow may cause 
  damages to power lines and trees or other vegetation that has 
  fully leafed out.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving. If you are going outside, watch your first few steps taken 
on stairs, sidewalks, and driveways. These surfaces could be icy and 
slippery, increasing your risk of a fall and injury. Do not touch 
downed lines and report any power outages to your electric company.

&&

$$

MTZ012-050-192200-
/O.CON.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Cascade-Judith Basin-
Including the cities of Raynesford, Stanford, Cascade, Great
Falls, Belt, and Hobson
230 AM MDT Wed May 19 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING 
TO 9 AM MDT FRIDAY...

* WHAT...Wet snow expected. Total snow accumulations of 1 to 3 
  inches in the lower elevations, with up to 6 inches in the 
  mountains.

* WHERE...Cascade and Judith Basin Counties.

* WHEN...From 9 PM this evening to 9 AM MDT Friday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous.

* ADDITIONAL DETAILS...The heavy, wet nature of the snow may cause 
  damages to power lines and trees or other vegetation that has 
  fully leafed out.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving. If you are going outside, watch your first few steps taken 
on stairs, sidewalks, and driveways. These surfaces could be icy and 
slippery, increasing your risk of a fall and injury. Do not touch 
downed lines and report any power outages to your electric company.

&&

$$

MTZ014-192200-
/O.CON.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Central and Southern Lewis and Clark-
Including the cities of Rogers Pass, MacDonald Pass, Lincoln, and
Flesher Pass
230 AM MDT Wed May 19 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING 
TO 9 AM MDT FRIDAY...

* WHAT...Snow expected. Total snow accumulations 1 to 4 inches at 
  lower elevations, and 5 to 10 inches in the mountains. Isolated 
  amounts approaching 16 inches near Rogers Pass are possible.

* WHERE...Central and Southern Lewis and Clark County.

* WHEN...From 9 PM this evening to 9 AM MDT Friday.

* IMPACTS...The wet and heavy nature of the snow could cause 
  isolated power outages and damage trees or vegetation that have 
  fully leaved out. Agricultural interests, especially those with 
  newborn or young livestock, could be extremely impacted due to the 
  duration of wet conditions and cold temperatures. Roads, 
  especially bridges and overpasses, will likely become slick and 
  hazardous. The wet and raw conditions could lead to hypothermia in 
  the backcountry if not adequately prepared.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving.

Do not touch downed lines and report any power outages to your 
electric company.

&&

$$

MTZ052-192200-
/O.CON.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Jefferson-
Including the cities of Boulder, Elk Park Pass, Boulder Hill,
Montana City, and Whitehall
230 AM MDT Wed May 19 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING 
TO 9 AM MDT FRIDAY...

* WHAT...Wet snow expected. Total snow accumulations 1 to 4 inches. 
  Isolated higher amounts in the mountains.

* WHERE...Jefferson County.

* WHEN...From 9 PM this evening to 9 AM MDT Friday.

* IMPACTS...Roads, especially bridges and overpasses, will likely 
  become slick and hazardous. The wet and raw conditions could lead 
  to hypothermia in the backcountry if not adequately prepared.

* ADDITIONAL DETAILS...The heavy, wet nature of the snow may cause 
  damages to power lines and trees or other vegetation that has 
  fully leafed out.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving. Do not touch downed lines and report any power outages to 
your electric company.

&&

$$

ML
616 
WWUS45 KTFX 192054
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
254 PM MDT Wed May 19 2021

MTZ009-048-201100-
/O.CON.KTFX.WS.W.0003.210520T0300Z-210521T1500Z/
Northern Rocky Mountain Front-Southern Rocky Mountain Front-
Including the cities of Marias Pass, Bynum, Choteau, Browning,
Heart Butte, Logan Pass, and Augusta
254 PM MDT Wed May 19 2021

...WINTER STORM WARNING REMAINS IN EFFECT
FROM 9 PM THIS EVENING TO 9 AM MDT FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 10 
  inches at lower elevations. In the mountains, 10 to 20 inches of 
  snow are expected, with isolated higher amounts.

* WHERE...Northern Rocky Mountain Front and Southern Rocky Mountain 
  Front.

* WHEN...From 9 PM this evening to 9 AM MDT Friday.

* IMPACTS...Isolated tree or power line damage is possible. 
  Visibility will be poor at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Travel will be difficult at times.

&&

$$

MTZ010-044>046-049-201100-
/O.EXT.KTFX.WW.Y.0034.210520T0900Z-210521T1500Z/
Eastern Glacier-Toole-Liberty-Eastern Pondera-Eastern Teton-
Including the cities of Brady, Shelby, Whitlash, Fairfield, Cut
Bank, Dutton, Chester, Conrad, and Sunburst
254 PM MDT Wed May 19 2021

...WINTER WEATHER ADVISORY NOW IN EFFECT
FROM 3 AM THURSDAY TO 9 AM MDT FRIDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 9 inches.

* WHERE...Eastern Glacier, Eastern Pondera, Eastern Teton, Liberty 
  and Toole Counties.

* WHEN...From 3 AM Thursday to 9 AM MDT Friday.

* IMPACTS...Isolated tree or power line damage is possible. 
  Visibility will be poor at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Roadways could be snow covered and slippery at times.

&&

$$

MTZ012-050-201100-
/O.CON.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Cascade-Judith Basin-
Including the cities of Raynesford, Stanford, Cascade, Great
Falls, Belt, and Hobson
254 PM MDT Wed May 19 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT
FROM 9 PM THIS EVENING TO 9 AM MDT FRIDAY...

* WHAT...Wet snow expected. Total snow accumulations of 1 to 3 
  inches in the lower elevations, with up to 6 inches in the 
  mountains.

* WHERE...Cascade and Judith Basin Counties.

* WHEN...From 9 PM this evening to 9 AM MDT Friday.

* IMPACTS...Isolated tree or power line damage is possible. 
  Visibility will be poor at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Roadways could be snow covered and slippery at times.

&&

$$

MTZ014-201100-
/O.CON.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Central and Southern Lewis and Clark-
Including the cities of Rogers Pass, MacDonald Pass, Lincoln, and
Flesher Pass
254 PM MDT Wed May 19 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT
FROM 9 PM THIS EVENING TO 9 AM MDT FRIDAY...

* WHAT...Snow expected. Total snow accumulations 1 to 4 inches at 
  lower elevations, and 5 to 10 inches in the mountains. Isolated 
  amounts near Rogers Pass.

* WHERE...Central and Southern Lewis and Clark County.

* WHEN...From 9 PM this evening to 9 AM MDT Friday.

* IMPACTS...Isolated tree or power line damage is possible. 
  Visibility will be poor at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Roadways could be snow covered and slippery at times.

&&

$$

MTZ052-201100-
/O.CON.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Jefferson-
Including the cities of Boulder, Elk Park Pass, Boulder Hill,
Montana City, and Whitehall
254 PM MDT Wed May 19 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT
FROM 9 PM THIS EVENING TO 9 AM MDT FRIDAY...

* WHAT...Wet snow expected. Total snow accumulations 1 to 4 inches. 
  Isolated higher amounts in the mountains.

* WHERE...Jefferson County.

* WHEN...From 9 PM this evening to 9 AM MDT Friday.

* IMPACTS...Visibility will be poor at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads.

&&

$$
548 
WWUS45 KTFX 200119
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
719 PM MDT Wed May 19 2021

MTZ014-201100-
/O.UPG.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
/O.EXB.KTFX.WS.W.0003.210520T0119Z-210521T1500Z/
Central and Southern Lewis and Clark-
Including the cities of Rogers Pass, MacDonald Pass, Lincoln, and
Flesher Pass
719 PM MDT Wed May 19 2021

THIS REPLACES THE WINTER WEATHER ADVISORY

...WINTER STORM WARNING IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Heavy snow is occurring. Total snow accumulations of 5 to 
  10 inches expected.

* WHERE...Central and Southern Lewis and Clark County.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Travel could be difficult due to slippery roads and 
  reduced visibility. Tree and or power line damage is possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The latest road conditions can be obtained by calling 5 1 1 or 
visiting the MDT Road Report website.

Do not touch downed lines and report any power outages to your 
electric company.

&&

$$

MTZ009-048-201100-
/O.CON.KTFX.WS.W.0003.210520T0300Z-210521T1500Z/
Northern Rocky Mountain Front-Southern Rocky Mountain Front-
Including the cities of Marias Pass, Bynum, Choteau, Browning,
Heart Butte, Logan Pass, and Augusta
719 PM MDT Wed May 19 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 10 
  inches at lower elevations. In the mountains, 10 to 20 inches of 
  snow are expected, with isolated higher amounts.

* WHERE...Northern Rocky Mountain Front and Southern Rocky Mountain 
  Front Counties.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Travel could be difficult due to slippery roads and 
  reduced visibility. Tree and or power line damage is possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The latest road conditions can be obtained by calling 5 1 1 or 
visiting the MDT Road Report website.

Do not touch downed lines and report any power outages to your 
electric company.

&&

$$

MTZ012-050-201100-
/O.CON.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Cascade-Judith Basin-
Including the cities of Raynesford, Stanford, Cascade, Great
Falls, Belt, and Hobson
719 PM MDT Wed May 19 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Wet snow expected. Total snow accumulations of 1 to 3 
  inches in the lower elevations, with up to 6 inches in the 
  mountains.

* WHERE...Cascade and Judith Basin Counties.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Isolated tree or power line damage is possible. 
  Visibility will be poor at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Roadways could be snow covered and slippery at times.

&&

$$

MTZ052-201100-
/O.CON.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Jefferson-
Including the cities of Boulder, Elk Park Pass, Boulder Hill,
Montana City, and Whitehall
719 PM MDT Wed May 19 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Wet snow expected. Total snow accumulations 1 to 4 inches. 
  Isolated higher amounts in the mountains.

* WHERE...Jefferson County.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Visibility will be poor at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads.

&&

$$

MTZ010-044>046-049-201100-
/O.CON.KTFX.WW.Y.0034.210520T0900Z-210521T1500Z/
Eastern Glacier-Toole-Liberty-Eastern Pondera-Eastern Teton-
Including the cities of Brady, Shelby, Whitlash, Fairfield, Cut
Bank, Dutton, Chester, Conrad, and Sunburst
719 PM MDT Wed May 19 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 3 AM THURSDAY TO 9 
AM MDT FRIDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 9 inches.

* WHERE...Eastern Glacier, Eastern Pondera, Eastern Teton, Liberty 
  and Toole Counties.

* WHEN...From 3 AM Thursday to 9 AM MDT Friday.

* IMPACTS...Isolated tree or power line damage is possible. 
  Visibility will be poor at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Roadways could be snow covered and slippery at times.

&&

$$

RG
731 
WWUS45 KTFX 200139
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
739 PM MDT Wed May 19 2021

MTZ014-201100-
/O.CON.KTFX.WS.W.0003.000000T0000Z-210521T1500Z/
Central and Southern Lewis and Clark-
Including the cities of Rogers Pass, MacDonald Pass, Lincoln, and
Flesher Pass
739 PM MDT Wed May 19 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Heavy snow is occurring. Total snow accumulations of 5 to 
  10 inches expected.

* WHERE...Central and Southern Lewis and Clark County.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Travel could be difficult due to slippery roads and 
  reduced visibility. Tree and or power line damage is possible.

* ADDITIONAL DETAILS...The heaviest snow and most impacts will occur 
  along and northwest of the highway 200 road segment that runs from 
  Bowman's corner to Roger's Pass. Lower snow totals and less 
  impacts can be expected elsewhere.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The latest road conditions can be obtained by calling 5 1 1 or 
visiting the MDT Road Report website.

Do not touch downed lines and report any power outages to your 
electric company.

&&

$$

MTZ009-048-201100-
/O.CON.KTFX.WS.W.0003.210520T0300Z-210521T1500Z/
Northern Rocky Mountain Front-Southern Rocky Mountain Front-
Including the cities of Marias Pass, Bynum, Choteau, Browning,
Heart Butte, Logan Pass, and Augusta
739 PM MDT Wed May 19 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 10 
  inches at lower elevations. In the mountains, 10 to 20 inches of 
  snow are expected, with isolated higher amounts.

* WHERE...Northern Rocky Mountain Front and Southern Rocky Mountain 
  Front Counties.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Travel could be difficult due to slippery roads and 
  reduced visibility. Tree and or power line damage is possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The latest road conditions can be obtained by calling 5 1 1 or 
visiting the MDT Road Report website.

Do not touch downed lines and report any power outages to your 
electric company.

&&

$$

MTZ012-050-201100-
/O.CON.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Cascade-Judith Basin-
Including the cities of Raynesford, Stanford, Cascade, Great
Falls, Belt, and Hobson
739 PM MDT Wed May 19 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Wet snow expected. Total snow accumulations of 1 to 3 
  inches in the lower elevations, with up to 6 inches in the 
  mountains.

* WHERE...Cascade and Judith Basin Counties.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Isolated tree or power line damage is possible. 
  Visibility will be poor at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Roadways could be snow covered and slippery at times.

&&

$$

MTZ052-201100-
/O.CON.KTFX.WW.Y.0034.210520T0300Z-210521T1500Z/
Jefferson-
Including the cities of Boulder, Elk Park Pass, Boulder Hill,
Montana City, and Whitehall
739 PM MDT Wed May 19 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Wet snow expected. Total snow accumulations 1 to 4 inches. 
  Isolated higher amounts in the mountains.

* WHERE...Jefferson County.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Visibility will be poor at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads.

&&

$$

MTZ010-044>046-049-201100-
/O.CON.KTFX.WW.Y.0034.210520T0900Z-210521T1500Z/
Eastern Glacier-Toole-Liberty-Eastern Pondera-Eastern Teton-
Including the cities of Brady, Shelby, Whitlash, Fairfield, Cut
Bank, Dutton, Chester, Conrad, and Sunburst
739 PM MDT Wed May 19 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 3 AM THURSDAY TO 9 
AM MDT FRIDAY...

* WHAT...Snow expected. Total snow accumulations of 4 to 9 inches.

* WHERE...Eastern Glacier, Eastern Pondera, Eastern Teton, Liberty 
  and Toole Counties.

* WHEN...From 3 AM Thursday to 9 AM MDT Friday.

* IMPACTS...Isolated tree or power line damage is possible. 
  Visibility will be poor at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Roadways could be snow covered and slippery at times.

&&

$$

RG
009 
WWUS45 KTFX 200819
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
219 AM MDT Thu May 20 2021

MTZ009-048-202130-
/O.CON.KTFX.WS.W.0003.000000T0000Z-210521T1500Z/
Northern Rocky Mountain Front-Southern Rocky Mountain Front-
Including the cities of Marias Pass, Bynum, Choteau, Browning,
Heart Butte, Logan Pass, and Augusta
219 AM MDT Thu May 20 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 12 
  inches at lower elevations. In the mountains, 12 to 24 inches of 
  snow are expected, with isolated higher amounts.

* WHERE...Northern Rocky Mountain Front and Southern Rocky Mountain 
  Front Counties.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Travel will be difficult due to slippery roads and 
  reduced visibility. Tree and or power line damage is expected.

* ADDITIONAL DETAILS...Visibility will be reduced below one half 
  mile at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

The latest road conditions can be obtained by calling 5 1 1 or 
visiting the MDT Road Report website.

Do not touch downed lines and report any power outages to your 
electric company.

&&

$$

MTZ014-202130-
/O.CON.KTFX.WS.W.0003.000000T0000Z-210521T1500Z/
Central and Southern Lewis and Clark-
Including the cities of Rogers Pass, MacDonald Pass, Lincoln, and
Flesher Pass
219 AM MDT Thu May 20 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Heavy snow is occurring. Total snow accumulations of 5 to 
  12 inches expected. Along the Continental Divide and immediate 
  east slopes, 12 to 18 inches snow accumulation is expected.

* WHERE...Central and Southern Lewis and Clark County. The Winter 
  Storm Warning does not include the Helena Valley and Lincoln, 
  where only advisory level criteria are likely.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Travel could be difficult due to slippery roads and 
  reduced visibility. Tree and or power line damage is possible.

* ADDITIONAL DETAILS...The heaviest snow and most impacts will occur 
  along and northwest of Montana Highway 200 from Bowman's corner to 
  Rogers Pass. Lower snow accumulations and lesser impacts can be 
  expected elsewhere.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in 
your vehicle in case of an emergency. The latest road conditions can 
be obtained by calling 5 1 1 or visiting the MDT Road Report website.

&&

$$

MTZ012-050-202130-
/O.CON.KTFX.WW.Y.0034.000000T0000Z-210521T1500Z/
Cascade-Judith Basin-
Including the cities of Raynesford, Stanford, Cascade, Great
Falls, Belt, and Hobson
219 AM MDT Thu May 20 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Wet snow expected. Total snow accumulations of 2 to 5 
  inches at lower elevations, with up to 10 inches mainly in the 
  mountains.

* WHERE...Cascade and Judith Basin Counties.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Isolated tree or power line damage is possible. 
  Visibility will be poor at times.

* ADDITIONAL DETAILS...The heavy, wet nature of the snow may cause 
  damages to power lines and trees or other vegetation that have 
  fully leafed out.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving. If you are going outside, watch your first few steps taken 
on stairs, sidewalks, and driveways. These surfaces could be icy and 
slippery, increasing your risk of a fall and injury.

&&

$$

MTZ052-202130-
/O.CON.KTFX.WW.Y.0034.000000T0000Z-210521T1500Z/
Jefferson-
Including the cities of Boulder, Elk Park Pass, Boulder Hill,
Montana City, and Whitehall
219 AM MDT Thu May 20 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Snow. Additional snow accumulations of 1 to 7 inches. 
  Highest snow accumulations of 4 to 7 inches expected along the 
  Interstate 15 corridor as well as Interstate 90 at Homestake Pass.

* WHERE...Jefferson County.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous. Visibility will be poor at 
  times.

* ADDITIONAL DETAILS...The heavy, wet nature of the snow may cause 
  damages to power lines and trees or other vegetation that has 
  fully leafed out.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving. If you are going outside, watch your first few steps taken 
on stairs, sidewalks, and driveways. These surfaces could be icy and 
slippery, increasing your risk of a fall and injury.

&&

$$

MTZ010-044>046-049-202130-
/O.CON.KTFX.WW.Y.0034.210520T0900Z-210521T1500Z/
Eastern Glacier-Toole-Liberty-Eastern Pondera-Eastern Teton-
Including the cities of Brady, Shelby, Whitlash, Fairfield, Cut
Bank, Dutton, Chester, Conrad, and Sunburst
219 AM MDT Thu May 20 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Snow expected. Total snow accumulations of 2 to 9 inches, 
  highest west of Interstate 15.

* WHERE...Eastern Glacier, Eastern Pondera, Eastern Teton, Liberty 
  and Toole Counties.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Isolated tree or power line damage is possible. 
  Visibility will be poor at times.

* ADDITIONAL DETAILS...The heavy, wet nature of the snow may cause 
  damages to power lines and trees or other vegetation that has 
  fully leafed out.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving. If you are going outside, watch your first few steps taken 
on stairs, sidewalks, and driveways. These surfaces could be icy and 
slippery, increasing your risk of a fall and injury.

&&

$$

CC
076 
WWUS45 KTFX 201356
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
756 AM MDT Thu May 20 2021

MTZ009-048-202200-
/O.CON.KTFX.WS.W.0003.000000T0000Z-210521T1500Z/
Northern Rocky Mountain Front-Southern Rocky Mountain Front-
Including the cities of Marias Pass, Bynum, Choteau, Browning,
Heart Butte, Logan Pass, and Augusta
756 AM MDT Thu May 20 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Heavy snow. Areas of blowing snow. Additional snow 
  accumulations of 4 to 11 inches, with isolated higher amounts. 
  Winds gusting as high as 35 mph.

* WHERE...Northern Rocky Mountain Front and Southern Rocky Mountain 
  Front

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Expect snow covered roads and poor visibility.

* ADDITIONAL DETAILS...Tree or power line damage is possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Travel is discouraged due to slippery roadways and the possibility 
of downed trees and power lines.

&&

$$

MTZ014-202200-
/O.CON.KTFX.WS.W.0003.000000T0000Z-210521T1500Z/
Central and Southern Lewis and Clark-
Including the cities of Rogers Pass, MacDonald Pass, Lincoln, and
Flesher Pass
756 AM MDT Thu May 20 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Heavy snow. Additional snow accumulations of 4 to 9 inches 
  in the mountains and up to 12 inches over Rogers Pass. Only 1 to 3 
  inches in the Helena valley.

* WHERE...Central and Southern Lewis and Clark County.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Travel could be difficult at times.

* ADDITIONAL DETAILS...Tree or power line damage is possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving.

&&

$$

MTZ010-044>046-049-202200-
/O.CON.KTFX.WW.Y.0034.000000T0000Z-210521T1500Z/
Eastern Glacier-Toole-Liberty-Eastern Pondera-Eastern Teton-
Including the cities of Brady, Shelby, Whitlash, Fairfield, Cut
Bank, Dutton, Chester, Conrad, and Sunburst
756 AM MDT Thu May 20 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Snow. Additional snow accumulations of 3 to 7 inches.

* WHERE...Eastern Glacier, Eastern Pondera, Eastern Teton, Liberty 
  and Toole Counties.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slippery and hazardous.

* ADDITIONAL DETAILS...Tree or power line damage is possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving.

&&

$$

MTZ012-050-202200-
/O.CON.KTFX.WW.Y.0034.000000T0000Z-210521T1500Z/
Cascade-Judith Basin-
Including the cities of Raynesford, Stanford, Cascade, Great
Falls, Belt, and Hobson
756 AM MDT Thu May 20 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Snow. Additional snow accumulations of 1 to 3 inches at 
  lower elevations and up to 6 inches in the mountains.

* WHERE...Cascade and Judith Basin Counties.

* WHEN...Until 9 AM MDT Friday. Most of the accumulating snow will 
  fall overnight tonight at lower elevations.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slippery and hazardous.

* ADDITIONAL DETAILS...Tree or power line damage is possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads. Slow down and use caution while 
driving.

&&

$$

MTZ052-202200-
/O.CON.KTFX.WW.Y.0034.000000T0000Z-210521T1500Z/
Jefferson-
Including the cities of Boulder, Elk Park Pass, Boulder Hill,
Montana City, and Whitehall
756 AM MDT Thu May 20 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Snow. Additional snow accumulations of 2 to 4 inches.

* WHERE...Jefferson County.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slippery and hazardous.

* ADDITIONAL DETAILS...Tree or power line damage is possible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared for slippery roads.

&&

$$
001 
WWUS45 KTFX 202018
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
218 PM MDT Thu May 20 2021

MTZ009-048-211100-
/O.CON.KTFX.WS.W.0003.000000T0000Z-210521T1500Z/
Northern Rocky Mountain Front-Southern Rocky Mountain Front-
Including the cities of Marias Pass, Bynum, Choteau, Browning,
Heart Butte, Logan Pass, and Augusta
218 PM MDT Thu May 20 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Heavy snow. Additional snow accumulations of 2 to 4 inches.

* WHERE...Northern Rocky Mountain Front and Southern Rocky Mountain 
  Front.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Plan on slippery road conditions. Patchy blowing snow 
  could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Travel is discouraged due to slippery roadways and the possibility 
of downed trees and power lines.

&&

$$

MTZ014-211100-
/O.CON.KTFX.WS.W.0003.000000T0000Z-210521T1500Z/
Central and Southern Lewis and Clark-
Including the cities of Rogers Pass, MacDonald Pass, Lincoln, and
Flesher Pass
218 PM MDT Thu May 20 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Heavy snow. Additional snow accumulations of 2 to 4 inches 
  in the mountains and 1 to 3 inches in the valleys.

* WHERE...Central and Southern Lewis and Clark County.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while driving.

&&

$$

MTZ010-044>046-049-211100-
/O.CON.KTFX.WW.Y.0034.000000T0000Z-210521T1500Z/
Eastern Glacier-Toole-Liberty-Eastern Pondera-Eastern Teton-
Including the cities of Brady, Shelby, Whitlash, Fairfield, Cut
Bank, Dutton, Chester, Conrad, and Sunburst
218 PM MDT Thu May 20 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Snow. Additional snow accumulations of 1 to 3 inches.

* WHERE...Eastern Glacier, Eastern Pondera, Eastern Teton, Liberty 
  and Toole Counties.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Patchy blowing snow could significantly reduce 
  visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while driving. 

&&

$$

MTZ012-050-211100-
/O.CON.KTFX.WW.Y.0034.000000T0000Z-210521T1500Z/
Cascade-Judith Basin-
Including the cities of Raynesford, Stanford, Cascade, Great
Falls, Belt, and Hobson
218 PM MDT Thu May 20 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Snow. Additional snow accumulations of 2 to 4 inches.

* WHERE...Cascade and Judith Basin Counties.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while driving.

&&

$$

MTZ052-211100-
/O.CON.KTFX.WW.Y.0034.000000T0000Z-210521T1500Z/
Jefferson-
Including the cities of Boulder, Elk Park Pass, Boulder Hill,
Montana City, and Whitehall
218 PM MDT Thu May 20 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT FRIDAY...

* WHAT...Snow. Additional snow accumulations of 1 to 3 inches.

* WHERE...Jefferson County.

* WHEN...Until 9 AM MDT Friday.

* IMPACTS...Plan on slippery road conditions. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

&&

$$
056 
WWUS45 KTFX 211028
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
428 AM MDT Fri May 21 2021

MTZ009-048-211500-
/O.CON.KTFX.WS.W.0003.000000T0000Z-210521T1500Z/
Northern Rocky Mountain Front-Southern Rocky Mountain Front-
Including the cities of Marias Pass, Bynum, Choteau, Browning,
Heart Butte, Logan Pass, and Augusta
428 AM MDT Fri May 21 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM MDT THIS 
MORNING...

* WHAT...Heavy snow. Additional snow accumulations up to two inches 
  on the plains, 1 to 3 inches on mountain passes, and up to 5 
  inches in the mountains.

* WHERE...Northern Rocky Mountain Front and Southern Rocky Mountain 
  Front.

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

* IMPACTS...Plan on slippery or snow covered road conditions and 
  reduced visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while driving.

&&

$$

MTZ014-211500-
/O.CON.KTFX.WS.W.0003.000000T0000Z-210521T1500Z/
Central and Southern Lewis and Clark-
Including the cities of Rogers Pass, MacDonald Pass, Lincoln, and
Flesher Pass
428 AM MDT Fri May 21 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM MDT THIS 
MORNING...

* WHAT...Heavy snow. Additional snow accumulations up to one inch in 
  the valleys, 1 to 2 inches on mountain passes, and up to 3 inches 
  in the mountains.

* WHERE...Central and Southern Lewis and Clark County.

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

* IMPACTS...Plan on slippery or snow covered road conditions and 
  reduced visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while driving.

&&

$$

MTZ010-044>046-049-211500-
/O.CON.KTFX.WW.Y.0034.000000T0000Z-210521T1500Z/
Eastern Glacier-Toole-Liberty-Eastern Pondera-Eastern Teton-
Including the cities of Brady, Shelby, Whitlash, Fairfield, Cut
Bank, Dutton, Chester, Conrad, and Sunburst
428 AM MDT Fri May 21 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT THIS 
MORNING...

* WHAT...Snow. Additional snow accumulations mostly up to one inch, 
  but up to 2 inches possible closer to the Rocky Mountain Front.

* WHERE...Eastern Glacier, Eastern Pondera, Eastern Teton, Liberty 
  and Toole Counties.

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

* IMPACTS...Plan on slippery or snow covered road conditions and 
  reduced visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

&&

$$

MTZ012-050-211500-
/O.CON.KTFX.WW.Y.0034.000000T0000Z-210521T1500Z/
Cascade-Judith Basin-
Including the cities of Raynesford, Stanford, Cascade, Great
Falls, Belt, and Hobson
428 AM MDT Fri May 21 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT THIS 
MORNING...

* WHAT...Snow. Additional snow accumulations of 1 to 2 inches.

* WHERE...Cascade and Judith Basin Counties.

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

* IMPACTS...Plan on slippery or snow covered road conditions and 
  reduced visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

&&

$$

MTZ052-211500-
/O.CON.KTFX.WW.Y.0034.000000T0000Z-210521T1500Z/
Jefferson-
Including the cities of Boulder, Elk Park Pass, Boulder Hill,
Montana City, and Whitehall
428 AM MDT Fri May 21 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM MDT THIS 
MORNING...

* WHAT...Snow. Additional snow accumulations up to one inch in the 
  valleys, and 1 to 3 inches in the mountains.

* WHERE...Jefferson County.

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

* IMPACTS...Plan on slippery or snow covered road conditions and 
  reduced visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

&&

$$

SC
261 
WWUS45 KTFX 211441
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
841 AM MDT Fri May 21 2021

MTZ009-014-048-211545-
/O.EXP.KTFX.WS.W.0003.000000T0000Z-210521T1500Z/
Northern Rocky Mountain Front-Central and Southern Lewis and
Clark-Southern Rocky Mountain Front-
Including the cities of Lincoln, Marias Pass, Bynum, Choteau,
Browning, Heart Butte, Logan Pass, Augusta, MacDonald Pass,
Rogers Pass, and Flesher Pass
841 AM MDT Fri May 21 2021

...WINTER STORM WARNING WILL EXPIRE AT 9 AM MDT THIS MORNING...

The threat has ended. Periods of light snow will continue this 
morning, but significant impacts are no longer expected.

$$

MTZ010-012-044>046-049-050-052-211545-
/O.EXP.KTFX.WW.Y.0034.000000T0000Z-210521T1500Z/
Eastern Glacier-Cascade-Toole-Liberty-Eastern Pondera-Eastern
Teton-Judith Basin-Jefferson-
Including the cities of Boulder, Belt, Hobson, Brady, Shelby,
Whitehall, Whitlash, Fairfield, Boulder Hill, Cut Bank,
Raynesford, Dutton, Chester, Great Falls, Elk Park Pass,
Stanford, Cascade, Conrad, Sunburst, and Montana City
841 AM MDT Fri May 21 2021

...WINTER WEATHER ADVISORY WILL EXPIRE AT 9 AM MDT THIS MORNING...

The threat has ended. Periods of light snow will continue this 
morning, but significant impacts are no longer expected.

$$

Brusda

The office that day

Everything else NWS Great Falls, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 18, 10:04 AM MDTHigh Wind WarningTFX10 hr
May 18, 2:36 PM MDTWinter Weather AdvisoryTFX66 hr

Nearby

Winter Storm Warnings in Montana, 2021Every winter storm warning in 2021

Sources

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