Alert archive / Montana / Wind Chill Advisories in 2021

Wind Chill Advisory 3, NWS Great Falls, MT

February 17, 2021

NWS Great Falls, MT issued this wind chill advisory at Feb 17, 2021, 1:21 PM MST. It took effect at Feb 18, 2021, 12:00 AM MST. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Feb 17, 2021, 1:21 PM MST (20:21 UTC)
In effect from
Feb 18, 2021, 12:00 AM MST
Expired
Feb 18, 2021, 9:00 AM MST
In force
9 hr
Issued by
NWS Great Falls, MT

The text

As transmitted.

221 
WWUS45 KTFX 172021
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
121 PM MST Wed Feb 17 2021

MTZ011-047-180830-
/O.NEW.KTFX.WC.Y.0003.210218T0700Z-210218T1600Z/
Hill-Blaine-
Including Havre, Rocky Boy, Rudyard, Chinook, Harlem, and Hays
121 PM MST Wed Feb 17 2021

...WIND CHILL ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM
MST THURSDAY...

* WHAT...Very cold wind chills expected. Wind chills as low as 25
  below zero. Lowest wind chills along and north of the Milk River
  Valley.

* WHERE...Hill and Blaine.

* WHEN...From midnight tonight to 9 AM MST Thursday.

* IMPACTS...The cold wind chills could cause frostbite on 
  exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves. 

&&

$$

MTZ015-053-055-180600-
/O.CON.KTFX.WW.Y.0015.000000T0000Z-210218T0600Z/
Madison-Broadwater-Gallatin-
Including Ennis, Norris Hill, Raynolds Pass, Twin Bridges, 
Virginia City, Toston, Townsend, Winston, Bozeman Apt, 
City of Bozeman, West Yellowstone, Battle Ridge Pass, 
Bozeman Pass, and Targhee Pass
121 PM MST Wed Feb 17 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

* WHAT...Snow occurring. Additional snow accumulations of up to 
  2 inches at most lower elevations, and 1 to 4 inches for 
  mountain passes and higher elevations.

* WHERE...Gallatin, Broadwater and Madison.

* WHEN...Until 11 PM MST this evening.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road
conditions can be obtained by calling 5 1 1.

&&

$$

MTZ012-050-054-180000-
/O.CON.KTFX.WW.Y.0015.000000T0000Z-210218T0000Z/
Cascade-Judith Basin-Meagher-
Including Great Falls, Cascade, Belt, Kings Hill Pass, 
Raynesford, Stanford, Hobson, Martinsdale, Deep Creek Pass, 
and White Sulphur Springs
121 PM MST Wed Feb 17 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Snow occurring. Total snow accumulations of 1 to 3 
  inches.

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

* WHEN...Until 5 PM MST this afternoon.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road
conditions can be obtained by calling 5 1 1.

&&

$$

http://www.weather.gov/greatfalls
5 follow-up statements
575 
WWUS45 KTFX 172348
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
448 PM MST Wed Feb 17 2021

MTZ012-050-054-180100-
/O.EXP.KTFX.WW.Y.0015.000000T0000Z-210218T0000Z/
Cascade-Judith Basin-Meagher-
Including Great Falls, Cascade, Belt, Kings Hill Pass, 
Raynesford, Stanford, Hobson, Martinsdale, Deep Creek Pass, 
and White Sulphur Springs
448 PM MST Wed Feb 17 2021

...WINTER WEATHER ADVISORY WILL EXPIRE AT 5 PM MST THIS
AFTERNOON...

Other than a few isolated snow showers, snow has come to an end
across the area. Roads may freeze up after sunset.

$$

MTZ015-053-055-180600-
/O.CON.KTFX.WW.Y.0015.000000T0000Z-210218T0600Z/
Madison-Broadwater-Gallatin-
Including Ennis, Norris Hill, Raynolds Pass, Twin Bridges, 
Virginia City, Toston, Townsend, Winston, Bozeman Apt, 
City of Bozeman, West Yellowstone, Battle Ridge Pass, 
Bozeman Pass, and Targhee Pass
448 PM MST Wed Feb 17 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

* WHAT...Snow occurring. Additional snow accumulations of up to 
  2 inches at most lower elevations, and 1 to 4 inches for 
  mountain passes and higher elevations.

* WHERE...Gallatin, Broadwater and Madison.

* WHEN...Until 11 PM MST this evening.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road
conditions can be obtained by calling 5 1 1.

&&

$$

MTZ011-047-181200-
/O.CON.KTFX.WC.Y.0003.210218T0700Z-210218T1600Z/
Hill-Blaine-
Including Havre, Rocky Boy, Rudyard, Chinook, Harlem, and Hays
448 PM MST Wed Feb 17 2021

...WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
9 AM MST THURSDAY...

* WHAT...Very cold wind chills expected. Wind chills as low as 
  25 below zero. Lowest wind chills along and north of the Milk 
  River Valley.

* WHERE...Hill and Blaine.

* WHEN...From midnight tonight to 9 AM MST Thursday.

* IMPACTS...The cold wind chills could cause frostbite on 
  exposed skin in as little as 30 minutes.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves.

&&

$$

http://www.weather.gov/greatfalls
279 
WWUS45 KTFX 180228
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
728 PM MST Wed Feb 17 2021

MTZ015-053-055-180330-
/O.CAN.KTFX.WW.Y.0015.000000T0000Z-210218T0600Z/
Madison-Broadwater-Gallatin-
728 PM MST Wed Feb 17 2021

...WINTER WEATHER ADVISORY IS CANCELLED...

Snow has mostly tapered off to a few isolated snow showers. While
a few brief periods of snow are still possible, any additional
accumulations will be limited. Regardless, roads may become icy
overnight as any snow that melted during the daytime refreezes.

$$

MTZ011-047-181430-
/O.CON.KTFX.WC.Y.0003.210218T0700Z-210218T1600Z/
Hill-Blaine-
Including Havre, Rocky Boy, Rudyard, Chinook, Harlem, and Hays
728 PM MST Wed Feb 17 2021

...WIND CHILL ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO
9 AM MST THURSDAY...

* WHAT...Very cold wind chills expected. Wind chills as low as 
  25 below zero. Lowest wind chills along and north of the Milk 
  River Valley.

* WHERE...Hill and Blaine.

* WHEN...From midnight tonight to 9 AM MST Thursday.

* IMPACTS...The cold wind chills could cause frostbite on exposed
  skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves.

&&

$$

http://www.weather.gov/greatfalls
050 
WWUS45 KTFX 181024
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
324 AM MST Thu Feb 18 2021

MTZ009-010-044-046-048-049-190000-
/O.NEW.KTFX.WW.Y.0016.210219T1200Z-210220T0600Z/
Northern Rocky Mountain Front-Eastern Glacier-Toole-
Eastern Pondera-Southern Rocky Mountain Front-Eastern Teton-
Including Logan Pass, Browning, Heart Butte, Cut Bank, Shelby, 
Sunburst, Brady, Conrad, Bynum, Choteau, Augusta, Fairfield, 
and Dutton
324 AM MST Thu Feb 18 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 5 AM TO 11 PM MST
FRIDAY...

* WHAT...Blowing snow expected. Winds gusting as high as 55 mph.

* WHERE...Portions of north central Montana.

* WHEN...From 5 AM to 11 PM MST Friday.

* IMPACTS...Widespread blowing snow could significantly reduce
  visibility. Drifting of snow onto roadways may also cause
  obstruction of driving lanes. Gusty winds could bring down tree
  branches as well.

* ADDITIONAL DETAILS...Some areas closer to the Rocky Mountain
  Front may have near ground blizzard conditions at times, causing
  considerable variability in visibility. However, these whiteout
  conditions are not expected to be widespread at this time.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1. 

To see a graphical representation of the degree of stress on
young livestock, please visit our webpage and select Local
Programs, then Cold Air Advisory for Newborn Livestock.

&&

$$

MTZ050-190000-
/O.NEW.KTFX.WW.Y.0016.210219T1200Z-210220T0600Z/
Judith Basin-
Including Raynesford, Stanford, and Hobson
324 AM MST Thu Feb 18 2021

...WINTER WEATHER ADVISORY IN EFFECT FROM 5 AM TO 11 PM MST
FRIDAY...

* WHAT...Blowing snow expected. Winds gusting as high as 40 mph.

* WHERE...Judith Basin.

* WHEN...From 5 AM to 11 PM MST Friday.

* IMPACTS...Areas of blowing snow could significantly reduce
  visibility. Drifting of snow onto roadways may also cause 
  obstruction of driving lanes. Gusty winds could bring down tree 
  branches as well.

* ADDITIONAL DETAILS...Near whiteout conditions will be possible
  at times on US Highway 87 from Raynesford to Stanford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1. 

To see a graphical representation of the degree of stress on
young livestock, please visit our webpage and select Local
Programs, then Cold Air Advisory for Newborn Livestock.

&&

$$

MTZ051-181600-
/O.EXA.KTFX.WC.Y.0003.000000T0000Z-210218T1600Z/
Fergus-
Including Lewistown, Winifred, Lewistown Divide, and Grass Range
324 AM MST Thu Feb 18 2021

...WIND CHILL ADVISORY IN EFFECT UNTIL 9 AM MST THIS MORNING...

* WHAT...Very cold wind chills occurring. Wind chills as low as 
  25 below zero.

* WHERE...Fergus.

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

* IMPACTS...The cold wind chills could cause frostbite on 
  exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves. 

&&

$$

MTZ011-047-181600-
/O.CON.KTFX.WC.Y.0003.000000T0000Z-210218T1600Z/
Hill-Blaine-
Including Havre, Rocky Boy, Rudyard, Chinook, Harlem, and Hays
324 AM MST Thu Feb 18 2021

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 9 AM MST THIS
MORNING...

* WHAT...Very cold wind chills occurring. Wind chills as low as 
  25 below zero.

* WHERE...Blaine and Hill.

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

* IMPACTS...The cold wind chills could cause frostbite on 
  exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves. 

&&

$$

http://www.weather.gov/greatfalls
643 
WWUS45 KTFX 181150
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
450 AM MST Thu Feb 18 2021

MTZ009-010-044-046-048-049-190000-
/O.CON.KTFX.WW.Y.0016.210219T1200Z-210220T0600Z/
Northern Rocky Mountain Front-Eastern Glacier-Toole-
Eastern Pondera-Southern Rocky Mountain Front-Eastern Teton-
Including Logan Pass, Browning, Heart Butte, Cut Bank, Shelby, 
Sunburst, Brady, Conrad, Bynum, Choteau, Augusta, Fairfield, 
and Dutton
450 AM MST Thu Feb 18 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 AM TO 11 PM
MST FRIDAY...

* WHAT...Blowing snow expected. Winds gusting as high as 55 mph.

* WHERE...Portions of north central Montana.

* WHEN...From 5 AM to 11 PM MST Friday.

* IMPACTS...Widespread blowing snow could significantly reduce 
  visibility. Drifting of snow onto roadways may also cause 
  obstruction of driving lanes. Gusty winds could bring down 
  tree branches as well.

* ADDITIONAL DETAILS...Some areas closer to the Rocky Mountain 
  Front may have near ground blizzard conditions at times, 
  causing considerable variability in visibility. However, these 
  whiteout conditions are not expected to be widespread at this 
  time.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

To see a graphical representation of the degree of stress on
young livestock, please visit our webpage and select Local
Programs, then Cold Air Advisory for Newborn Livestock.

&&

$$

MTZ050-190000-
/O.CON.KTFX.WW.Y.0016.210219T1200Z-210220T0600Z/
Judith Basin-
Including Raynesford, Stanford, and Hobson
450 AM MST Thu Feb 18 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 AM TO 11 PM
MST FRIDAY...

* WHAT...Blowing snow expected. Winds gusting as high as 40 mph.

* WHERE...Judith Basin.

* WHEN...From 5 AM to 11 PM MST Friday.

* IMPACTS...Areas of blowing snow could significantly reduce 
  visibility. Drifting of snow onto roadways may also cause 
  obstruction of driving lanes. Gusty winds could bring down 
  tree branches as well.

* ADDITIONAL DETAILS...Near whiteout conditions will be possible 
  at times on US Highway 87 from Raynesford to Stanford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

To see a graphical representation of the degree of stress on
young livestock, please visit our webpage and select Local
Programs, then Cold Air Advisory for Newborn Livestock.

&&

$$

MTZ011-047-051-181600-
/O.CON.KTFX.WC.Y.0003.000000T0000Z-210218T1600Z/
Hill-Blaine-Fergus-
Including Havre, Rocky Boy, Rudyard, Chinook, Harlem, Hays, 
Lewistown, Winifred, Lewistown Divide, and Grass Range
450 AM MST Thu Feb 18 2021

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 9 AM MST THIS
MORNING...

* WHAT...Very cold wind chills occurring. Wind chills as low as 
  25 below zero.

* WHERE...Blaine and Hill.

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

* IMPACTS...The cold wind chills could cause frostbite on 
  exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution while traveling outside. Wear appropriate clothing, a
hat, and gloves.

&&

$$

http://www.weather.gov/greatfalls
585 
WWUS45 KTFX 181553
WSWTFX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
853 AM MST Thu Feb 18 2021

MTZ011-047-051-181700-
/O.EXP.KTFX.WC.Y.0003.000000T0000Z-210218T1600Z/
Hill-Blaine-Fergus-
Including Havre, Rocky Boy, Rudyard, Chinook, Harlem, Hays, 
Lewistown, Winifred, Lewistown Divide, and Grass Range
853 AM MST Thu Feb 18 2021

...WIND CHILL ADVISORY WILL EXPIRE AT 9 AM MST THIS MORNING...

The Wind Chill Advisory will be allowed to expire at 9am this
morning as temperatures and wind chill values continue to warm
above advisory levels. While temperatures continue to warm this
morning, you are still encouraged to take precautions to minimize
the risk of frostbite by wearing extra layers, hats, and mittens.

$$

MTZ009-010-044-046-048-049-191200-
/O.CON.KTFX.WW.Y.0016.210219T1200Z-210220T0600Z/
Northern Rocky Mountain Front-Eastern Glacier-Toole-
Eastern Pondera-Southern Rocky Mountain Front-Eastern Teton-
Including Logan Pass, Browning, Heart Butte, Cut Bank, Shelby, 
Sunburst, Brady, Conrad, Bynum, Choteau, Augusta, Fairfield, 
and Dutton
853 AM MST Thu Feb 18 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 AM TO 11 PM
MST FRIDAY...

* WHAT...Blowing snow expected. Winds gusting as high as 55 mph.

* WHERE...Portions of north central Montana.

* WHEN...From 5 AM to 11 PM MST Friday.

* IMPACTS...Widespread blowing snow could significantly reduce 
  visibility. Drifting of snow onto roadways may also cause 
  obstruction of driving lanes. Gusty winds could bring down 
  tree branches as well.

* ADDITIONAL DETAILS...Some areas closer to the Rocky Mountain 
  Front may have near ground blizzard conditions at times, 
  causing considerable variability in visibility. However, these 
  whiteout conditions are not expected to be widespread at this 
  time.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

To see a graphical representation of the degree of stress on
young livestock, please visit our webpage and select Local
Programs, then Cold Air Advisory for Newborn Livestock.

&&

$$

MTZ050-191200-
/O.CON.KTFX.WW.Y.0016.210219T1200Z-210220T0600Z/
Judith Basin-
Including Raynesford, Stanford, and Hobson
853 AM MST Thu Feb 18 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 AM TO 11 PM
MST FRIDAY...

* WHAT...Blowing snow expected. Winds gusting as high as 40 mph.

* WHERE...Judith Basin.

* WHEN...From 5 AM to 11 PM MST Friday.

* IMPACTS...Areas of blowing snow could significantly reduce 
  visibility. Drifting of snow onto roadways may also cause 
  obstruction of driving lanes. Gusty winds could bring down 
  tree branches as well.

* ADDITIONAL DETAILS...Near whiteout conditions will be possible 
  at times on US Highway 87 from Raynesford to Stanford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

The latest road conditions for the state you are calling from can
be obtained by calling 5 1 1.

To see a graphical representation of the degree of stress on
young livestock, please visit our webpage and select Local
Programs, then Cold Air Advisory for Newborn Livestock.

&&

$$

http://www.weather.gov/greatfalls

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 17, 7:46 AM MSTSpecial Weather StatementTFXCascade119 min
Feb 17, 9:47 AM MSTSpecial Weather StatementTFXCascade, Teton88 min

Nearby

Wind Chill Advisories in Montana, 2021Every wind chill advisory 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.