Alert archive / Montana / Wind Chill Advisories in 2022

Wind Chill Advisory 2, NWS Missoula, MT

February 21, 202211 counties in Montana; Clearwater County, Idaho County, Lemhi County, Idaho

NWS Missoula, MT issued this wind chill advisory at Feb 21, 2022, 5:11 AM MST for 11 counties in Montana; Clearwater County, Idaho County, Lemhi County, Idaho. It took effect at Feb 21, 2022, 9:59 AM MST. It was in force for 46 hr.

The area

The counties it named.

The facts

Issued
Feb 21, 2022, 5:11 AM MST (12:11 UTC)
In effect from
Feb 21, 2022, 9:59 AM MST
Expired
Feb 23, 2022, 8:00 AM MST
In force
46 hr
Issued by
NWS Missoula, MT

Counties Clearwater County, ID, Idaho County, ID, Lemhi County, ID, Deer Lodge County, MT, Flathead County, MT, Granite County, MT, Lake County, MT, Lincoln County, MT, Mineral County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Sanders County, MT, Silver Bow County, MT

The radar

The Missoula radar (KMSX), 32 km from the middle of the area, began a volume at 12:15 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Spokane, WA (KOTX), launched 12:00Z, 0.2 hours before the alert went out and 194 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Spokane, WA at 12:00Z on 2022-02-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Spokane, WA at 12:00Z on 2022-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -27 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
913 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-27 m²/s²
0-3 km storm-relative helicity
40 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

340 
WWUS45 KMSO 211211
WSWMSO

URGENT - WINTER WEATHER MESSAGE
National Weather Service Missoula MT
511 AM MST Mon Feb 21 2022

MTZ002-221215-
/O.NEW.KMSO.WC.W.0001.220222T0600Z-220222T1800Z/
/O.NEW.KMSO.WC.Y.0002.220221T1800Z-220222T0600Z/
/O.EXT.KMSO.WS.W.0006.000000T0000Z-220221T1800Z/
West Glacier Region-
511 AM MST Mon Feb 21 2022

...WINTER STORM WARNING NOW IN EFFECT UNTIL 11 AM MST THIS
MORNING...
...WIND CHILL ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 11 PM
MST THIS EVENING...
...WIND CHILL WARNING IN EFFECT FROM 11 PM THIS EVENING TO 11 AM
MST TUESDAY...

* WHAT...For the Winter Storm Warning, heavy snow. Additional 
  snow accumulations of up to one inch. Winds gusting as high as 
  35 mph. For the Wind Chill Warning, dangerously cold wind 
  chills expected. Wind chills 30 to 40 below zero. For the 
  Wind Chill Advisory, very cold wind chills expected. Wind 
  chills as low as 25 below zero.

* WHERE...Bad Rock Canyon, Essex, Highway 83 Bigfork to Swan 
  Lake, Marias Pass, and Polebridge.

* WHEN...For the Winter Storm Warning, until 11 AM MST this 
  morning. For the Wind Chill Warning, from 11 PM this evening 
  to 11 AM MST Tuesday. For the Wind Chill Advisory, from 11 AM 
  this morning to 11 PM MST this evening.

* IMPACTS...Travel could be affected. Patchy blowing snow could 
  significantly reduce visibility. The dangerously cold wind 
  chills could cause frostbite on exposed skin in as little as 5 
  minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

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

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

&&

$$

MTZ007-221215-
/O.NEW.KMSO.WC.W.0001.220222T0600Z-220222T1800Z/
/O.NEW.KMSO.WC.Y.0002.220221T1800Z-220222T0600Z/
/O.CON.KMSO.WS.W.0006.000000T0000Z-220221T1800Z/
Butte/Blackfoot Region-
511 AM MST Mon Feb 21 2022

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
...WIND CHILL ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 11 PM
MST THIS EVENING...
...WIND CHILL WARNING IN EFFECT FROM 11 PM THIS EVENING TO 11 AM
MST TUESDAY...

* WHAT...For the Winter Storm Warning, heavy snow. Additional 
  snow accumulations of up to one inch. For the Wind Chill 
  Warning, dangerously cold wind chills expected. Wind chills  
  30 to 40 below zero. For the Wind Chill Advisory, very cold 
  wind chills expected. Wind chills 20 to 30 below zero.

* WHERE...Butte, Georgetown Lake, Highway 12 Garrison to 
  Elliston, Homestake Pass, and MacDonald Pass.

* WHEN...For the Winter Storm Warning, until 11 AM MST this 
  morning. For the Wind Chill Warning, from 11 PM this evening 
  to 11 AM MST Tuesday. For the Wind Chill Advisory, from 11 AM 
  this morning to 11 PM MST this evening.

* IMPACTS...Travel could be affected. Patchy blowing snow could 
  significantly reduce visibility. The dangerously cold wind 
  chills could cause frostbite on exposed skin in as little as 
  10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

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

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

&&

$$

MTZ043-221215-
/O.NEW.KMSO.WC.W.0001.220222T0600Z-220222T1800Z/
/O.NEW.KMSO.WC.Y.0002.220221T1800Z-220222T0600Z/
/O.CON.KMSO.WS.W.0006.000000T0000Z-220221T1800Z/
Potomac/Seeley Lake Region-
511 AM MST Mon Feb 21 2022

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
...WIND CHILL ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 11 PM
MST THIS EVENING...
...WIND CHILL WARNING IN EFFECT FROM 11 PM THIS EVENING TO 11 AM
MST TUESDAY...

* WHAT...For the Winter Storm Warning, heavy snow. Additional 
  snow accumulations of up to one inch. For the Wind Chill 
  Warning, dangerously cold wind chills expected. Wind chills 30 
  to 40 below zero. For the Wind Chill Advisory, very cold 
  wind chills expected. Wind chills 20 to 30 below zero.

* WHERE...Highway 200 Bonner to Greenough, Highway 83 Seeley 
  Lake to Condon, and I-90 East Missoula to Bearmouth.

* WHEN...For the Winter Storm Warning, until 11 AM MST this 
  morning. For the Wind Chill Warning, from 11 PM this evening 
  to 11 AM MST Tuesday. For the Wind Chill Advisory, from 11 AM 
  this morning to 11 PM MST this evening.

* IMPACTS...Travel could be affected. Patchy blowing snow could 
  significantly reduce visibility. The dangerously cold wind 
  chills could cause frostbite on exposed skin in as little as 
  10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

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

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

&&

$$

MTZ003-221215-
/O.NEW.KMSO.WC.Y.0002.220222T0000Z-220222T1800Z/
/O.CON.KMSO.WS.W.0006.000000T0000Z-220221T1800Z/
Flathead/Mission Valleys-
511 AM MST Mon Feb 21 2022

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
...WIND CHILL ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO
11 AM MST TUESDAY...

* WHAT...For the Winter Storm Warning, heavy snow. Additional 
  snow accumulations of up to one inch. Winds gusting as high as 
  40 mph. For the Wind Chill Advisory, very cold wind chills 
  expected. Wind chills  25 to 30 below zero.

* WHERE...Flathead Lake, Flathead Valley, Mission Valley, and 
  Polson.

* WHEN...For the Winter Storm Warning, until 11 AM MST this 
  morning. For the Wind Chill Advisory, from 5 PM this afternoon 
  to 11 AM MST Tuesday.

* IMPACTS...Travel could be affected. Patchy blowing snow could 
  significantly reduce visibility. The dangerously cold wind 
  chills could cause frostbite on exposed skin in as little as 
  10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. 

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

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

&&

$$

MTZ001-221215-
/O.NEW.KMSO.WC.Y.0002.220222T0000Z-220222T1800Z/
/O.CON.KMSO.WW.Y.0015.000000T0000Z-220221T1800Z/
Kootenai/Cabinet Region-
511 AM MST Mon Feb 21 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
...WIND CHILL ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO
11 AM MST TUESDAY...

* WHAT...For the Winter Weather Advisory, snow. Additional snow
  accumulations of up to one inch. For the Wind Chill Advisory,
  very cold wind chills expected. Wind chills 15 to 25 below 
  zero.

* WHERE...Highway 2 Kalispell to Libby, Highway 37 Eureka to 
  Libby, Highway 56 Bull Lake Road, and Highway 93 Eureka to 
  Whitefish.

* WHEN...For the Winter Weather Advisory, until 11 AM MST this 
  morning. For the Wind Chill Advisory, from 5 PM this afternoon 
  to 11 AM MST Tuesday.

* IMPACTS...Travel could be affected. Patchy blowing snow could 
  significantly reduce visibility. The dangerously cold wind 
  chills could cause frostbite on exposed skin in as little as 
  10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

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

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

&&

$$

MTZ004-221215-
/O.NEW.KMSO.WC.Y.0002.220222T0300Z-220222T1800Z/
/O.CON.KMSO.WW.Y.0015.000000T0000Z-220221T1800Z/
Lower Clark Fork Region-
511 AM MST Mon Feb 21 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
...WIND CHILL ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 11 AM
MST TUESDAY...

* WHAT...For the Winter Weather Advisory, snow. Additional snow 
  accumulations of up to one inch. For the Wind Chill Advisory, 
  very cold wind chills expected. Wind chills 20 to 25 below 
  zero.

* WHERE...Evaro Hill, Highway 200 Thompson Falls to Plains, 
  Highway 200 Trout Creek to Heron, and I-90 Lookout Pass to 
  Haugan.

* WHEN...For the Winter Weather Advisory, until 11 AM MST this 
  morning. For the Wind Chill Advisory, from 8 PM this evening 
  to 11 AM MST Tuesday.

* IMPACTS...Travel could be affected. Patchy blowing snow could 
  significantly reduce visibility. The dangerously cold wind 
  chills could cause frostbite on exposed skin in as little as 
  10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

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

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

&&

$$

MTZ005-221215-
/O.NEW.KMSO.WC.Y.0002.220222T0300Z-220222T1800Z/
/O.CON.KMSO.WW.Y.0015.000000T0000Z-220221T1800Z/
Missoula/Bitterroot Valleys-
511 AM MST Mon Feb 21 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
...WIND CHILL ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 11 AM
MST TUESDAY...

* WHAT...For the Winter Weather Advisory, snow. Additional snow 
  accumulations of up to one inch. For the Wind Chill Advisory, 
  very cold wind chills expected. Wind chills 15 to 25 below 
  zero.

* WHERE...Missoula/Bitterroot Valleys.

* WHEN...For the Winter Weather Advisory, until 11 AM MST this 
  morning. For the Wind Chill Advisory, from 8 PM this evening 
  to 11 AM MST Tuesday.

* IMPACTS...Travel could be affected. Patchy blowing snow could 
  significantly reduce visibility. The cold wind chills could 
  cause frostbite on exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

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

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

&&

$$

MTZ006-221215-
/O.NEW.KMSO.WC.Y.0002.220222T0300Z-220222T1800Z/
/O.CON.KMSO.WW.Y.0015.000000T0000Z-220221T1800Z/
Bitterroot/Sapphire Mountains-
511 AM MST Mon Feb 21 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
...WIND CHILL ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 11 AM
MST TUESDAY...

* WHAT...For the Winter Weather Advisory, snow. Additional snow 
  accumulations of up to one inch. For the Wind Chill Advisory, 
  very cold wind chills expected. Wind chills 25 to 30 below 
  zero.

* WHERE...Bitterroot/Sapphire Mountains.

* WHEN...For the Winter Weather Advisory, until 11 AM MST this 
  morning. For the Wind Chill Advisory, from 8 PM this evening 
  to 11 AM MST Tuesday.

* IMPACTS...Travel could be affected. Patchy blowing snow could 
  significantly reduce visibility. The dangerously cold wind 
  chills could cause frostbite on exposed skin in as little as 
  10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

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

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

&&

$$

IDZ005-221215-
/O.NEW.KMSO.WC.Y.0002.220222T0300Z-220222T1800Z/
/O.CON.KMSO.WW.Y.0015.000000T0000Z-220221T1800Z/
Northern Clearwater Mountains-
411 AM PST Mon Feb 21 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...
...WIND CHILL ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 10 AM
PST TUESDAY...

* WHAT...For the Winter Weather Advisory, snow. Additional snow 
  accumulations of up to two inches. For the Wind Chill 
  Advisory, very cold wind chills expected. Wind chills 15 to 25
  below zero.

* WHERE...Elk River, Highway 11 Pierce to Headquarters, and 
  Pierce.

* WHEN...For the Winter Weather Advisory, until 10 AM PST this 
  morning. For the Wind Chill Advisory, from 7 PM this evening 
  to 10 AM PST Tuesday.

* IMPACTS...Travel could be affected. Patchy blowing snow could 
  significantly reduce visibility. The dangerously cold wind 
  chills could cause frostbite on exposed skin in as little as 
  10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

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

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

&&

$$

IDZ006-221215-
/O.NEW.KMSO.WC.Y.0002.220222T0300Z-220222T1800Z/
/O.CON.KMSO.WW.Y.0015.000000T0000Z-220221T1800Z/
Southern Clearwater Mountains-
411 AM PST Mon Feb 21 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...
...WIND CHILL ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 10 AM
PST TUESDAY...

* WHAT...For the Winter Weather Advisory, snow. Additional snow 
  accumulations of up to two inches. For the Wind Chill 
  Advisory, very cold wind chills expected. Wind chills 15 to 25
  below zero.

* WHERE...Dixie, Elk City, and Highway 12 Lowell to Lolo Pass.

* WHEN...For the Winter Weather Advisory, until 10 AM PST this 
  morning. For the Wind Chill Advisory, from 7 PM this evening 
  to 10 AM PST Tuesday.

* IMPACTS...Travel could be affected. The dangerously cold wind 
  chills could cause frostbite on exposed skin in as little as 
  10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

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

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

&&

$$

IDZ009-010-221215-
/O.NEW.KMSO.WC.Y.0002.220222T0300Z-220222T1800Z/
Western Lemhi County-Eastern Lemhi County-
511 AM MST Mon Feb 21 2022

...WIND CHILL ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 11 AM
MST TUESDAY...

* WHAT...Very cold wind chills expected. Wind chills 20 to 30
         below zero.

* WHERE...Shoup, Bannock Pass, Highway 28 Tendoy to Lone Pine, 
  Highway 93 Lost Trail Pass to Gibbonsville, Lemhi Pass, and 
  Salmon.

* WHEN...From 8 PM this evening to 11 AM MST Tuesday.

* IMPACTS...The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

IDZ007-008-211800-
/O.CON.KMSO.WW.Y.0015.000000T0000Z-220221T1800Z/
Orofino/Grangeville Region-Lower Hells Canyon/Salmon River Region-
411 AM PST Mon Feb 21 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS
MORNING...

* WHAT...Snow. Additional snow accumulations of up to one inch.

* WHERE...Camas Prairie, Grangeville and vicinity, Greer Grade, 
  Highway 95 Slate Creek to Riggins, and White Bird Grade.

* WHEN...Until 10 AM PST this morning.

* IMPACTS...Travel could be affected.

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.

&&

$$
4 follow-up statements
916 
WWUS45 KMSO 211659
WSWMSO

URGENT - WINTER WEATHER MESSAGE
National Weather Service Missoula MT
959 AM MST Mon Feb 21 2022

MTZ002-007-043-221700-
/O.CAN.KMSO.WS.W.0006.000000T0000Z-220221T1800Z/
/O.CAN.KMSO.WC.Y.0002.220221T1800Z-220222T0600Z/
/O.EXT.KMSO.WC.W.0001.220221T1659Z-220222T1800Z/
West Glacier Region-Butte/Blackfoot Region-
Potomac/Seeley Lake Region-
959 AM MST Mon Feb 21 2022

...WIND CHILL WARNING NOW IN EFFECT UNTIL 11 AM MST TUESDAY...

* WHAT...Dangerously cold wind chills expected. Wind chills 30 to
  40 below zero. Also, watch for blowing and drifting snow.

* WHERE...Butte/Blackfoot Region, West Glacier Region and 
  Potomac/Seeley Lake Region.

* WHEN...Until 11 AM MST Tuesday.

* IMPACTS...The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

MTZ003-221700-
/O.CAN.KMSO.WS.W.0006.000000T0000Z-220221T1800Z/
/O.EXT.KMSO.WC.Y.0002.220221T1659Z-220222T1800Z/
Flathead/Mission Valleys-
959 AM MST Mon Feb 21 2022

...WIND CHILL ADVISORY NOW IN EFFECT UNTIL 11 AM MST TUESDAY...

* WHAT...Very cold wind chills 25 to 30 below zero expected. Also
  watch for blowing and drifting snow. 

* WHERE...Flathead Lake, Flathead Valley, Mission Valley, and 
  Polson.

* WHEN...Until 11 AM MST Tuesday.

* IMPACTS...Patchy blowing snow could significantly reduce 
  visibility. The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

MTZ001-221700-
/O.CAN.KMSO.WW.Y.0015.000000T0000Z-220221T1800Z/
/O.EXT.KMSO.WC.Y.0002.220221T1659Z-220222T1800Z/
Kootenai/Cabinet Region-
959 AM MST Mon Feb 21 2022

...WIND CHILL ADVISORY NOW IN EFFECT UNTIL 11 AM MST TUESDAY...

* WHAT...Very cold wind chills 15 to 25 below zero expected. Also,
  watch for blowing and drifting snow.

* WHERE...Highway 2 Kalispell to Libby, Highway 37 Eureka to 
  Libby, Highway 56 Bull Lake Road, and Highway 93 Eureka to 
  Whitefish.

* WHEN...Until 11 AM MST Tuesday.

* IMPACTS...Patchy blowing snow could significantly reduce 
  visibility. The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

MTZ004-221700-
/O.EXT.KMSO.WC.Y.0002.220221T1800Z-220222T1800Z/
/O.CON.KMSO.WW.Y.0015.000000T0000Z-220221T1800Z/
Lower Clark Fork Region-
959 AM MST Mon Feb 21 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
...WIND CHILL ADVISORY NOW IN EFFECT UNTIL 11 AM MST TUESDAY...

* WHAT...Very cold wind chills 20 to 25 below zero expected. Watch
  for blowing and drifting snow as some light snow continues.

* WHERE...Evaro Hill, Highway 200 Thompson Falls to Plains,
  Highway 200 Trout Creek to Heron, and I-90 Lookout Pass to
  Haugan. Mountain passes and the back country will see the
  coldest wind chills.

* WHEN...For the Winter Weather Advisory, until 11 AM MST this 
  morning. For the Wind Chill Advisory, until 11 AM MST Tuesday.

* IMPACTS...Travel could be affected. Patchy blowing snow could 
  significantly reduce visibility. The dangerously cold wind 
  chills could cause frostbite on exposed skin in as little as 
  10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

MTZ005-221700-
/O.EXT.KMSO.WC.Y.0002.220221T1800Z-220222T1800Z/
/O.CON.KMSO.WW.Y.0015.000000T0000Z-220221T1800Z/
Missoula/Bitterroot Valleys-
959 AM MST Mon Feb 21 2022

...WIND CHILL ADVISORY NOW IN EFFECT UNTIL 11 AM MST TUESDAY...

* WHAT...Very cold wind chills 15 to 25 below zero expected. Also,
  watch for blowing and drifting snow.

* WHERE...Missoula/Bitterroot Valleys.

* WHEN...For the Winter Weather Advisory, until 11 AM MST this 
  morning. For the Wind Chill Advisory, until 11 AM MST Tuesday.

* IMPACTS...Travel could be affected. Patchy blowing snow could 
  significantly reduce visibility. 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.

&&

$$

MTZ006-221700-
/O.EXT.KMSO.WC.Y.0002.220221T1800Z-220222T1800Z/
/O.CON.KMSO.WW.Y.0015.000000T0000Z-220221T1800Z/
Bitterroot/Sapphire Mountains-
959 AM MST Mon Feb 21 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
...WIND CHILL ADVISORY NOW IN EFFECT UNTIL 11 AM MST TUESDAY...

* WHAT...Very cold wind chills 25 to 30 below zero expected. Also,
  watch for blowing and drifting snow. Light snow will continue in
  the mountains.

* WHERE...Bitterroot/Sapphire Mountains.

* WHEN...For the Winter Weather Advisory, until 11 AM MST this 
  morning. For the Wind Chill Advisory, until 11 AM MST Tuesday.

* IMPACTS...Travel could be affected. Patchy blowing snow could 
  significantly reduce visibility. The dangerously cold wind 
  chills could cause frostbite on exposed skin in as little as 
  10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

IDZ005-221700-
/O.EXT.KMSO.WW.Y.0015.000000T0000Z-220222T0000Z/
/O.EXT.KMSO.WC.Y.0002.220222T0000Z-220222T1800Z/
Northern Clearwater Mountains-
859 AM PST Mon Feb 21 2022

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON...
...WIND CHILL ADVISORY NOW IN EFFECT FROM 4 PM THIS AFTERNOON TO
10 AM PST TUESDAY...

* WHAT...For the Winter Weather Advisory, snow. Additional snow
  accumulations of up to four inches with blowing and drifting
  snow. For the Wind Chill Advisory, very cold wind chills 
  expected. Wind chills 15 to 25 below zero.

* WHERE...Elk River, Highway 11 Pierce to Headquarters, and 
  Pierce.

* WHEN...For the Winter Weather Advisory, until 4 PM PST this 
  afternoon. For the Wind Chill Advisory, from 4 PM this 
  afternoon to 10 AM PST Tuesday.

* IMPACTS...Travel could be affected. Patchy blowing snow could 
  significantly reduce visibility. The dangerously cold wind 
  chills could cause frostbite on exposed skin in as little as 
  10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

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

&&

$$

IDZ006-221700-
/O.EXT.KMSO.WW.Y.0015.000000T0000Z-220222T0000Z/
/O.EXT.KMSO.WC.Y.0002.220222T0000Z-220222T1800Z/
Southern Clearwater Mountains-
859 AM PST Mon Feb 21 2022

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON...
...WIND CHILL ADVISORY NOW IN EFFECT FROM 4 PM THIS AFTERNOON TO
10 AM PST TUESDAY...

* WHAT...For the Winter Weather Advisory, snow. Additional snow
  accumulations of up to four inches with blowing and drifting
  snow. For the Wind Chill Advisory, very cold wind chills 
  expected. Wind chills 15 to 25 below zero.

* WHERE...Dixie, Elk City, and Highway 12 Lowell to Lolo Pass.

* WHEN...For the Winter Weather Advisory, until 4 PM PST this 
  afternoon. For the Wind Chill Advisory, from 4 PM this 
  afternoon to 10 AM PST Tuesday.

* IMPACTS...Travel could be affected. The dangerously cold wind 
  chills could cause frostbite on exposed skin in as little as 
  10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

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

&&

$$

IDZ007-008-220000-
/O.EXT.KMSO.WW.Y.0015.000000T0000Z-220222T0000Z/
Orofino/Grangeville Region-Lower Hells Canyon/Salmon River Region-
859 AM PST Mon Feb 21 2022

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 4 PM PST THIS
AFTERNOON...

* WHAT...Snow. Additional snow accumulations of up to four inches.

* WHERE...Camas Prairie, Grangeville and vicinity, Greer Grade, 
  Highway 95 Slate Creek to Riggins, and White Bird Grade.

* WHEN...Until 4 PM PST this afternoon.

* IMPACTS...Travel could be affected.

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.

&&

$$

IDZ009-010-221700-
/O.EXT.KMSO.WC.Y.0002.220222T0000Z-220222T1800Z/
Western Lemhi County-Eastern Lemhi County-
959 AM MST Mon Feb 21 2022

...WIND CHILL ADVISORY NOW IN EFFECT FROM 5 PM THIS AFTERNOON TO
11 AM MST TUESDAY...

* WHAT...Very cold wind chills expected. Wind chills 20 to 30 
  below zero.

* WHERE...Shoup, Bannock Pass, Highway 28 Tendoy to Lone Pine, 
  Highway 93 Lost Trail Pass to Gibbonsville, Lemhi Pass, and 
  Salmon.

* WHEN...From 5 PM this afternoon to 11 AM MST Tuesday.

* IMPACTS...The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
140 
WWUS45 KMSO 221325
WSWMSO

URGENT - WINTER WEATHER MESSAGE
National Weather Service Missoula MT
625 AM MST Tue Feb 22 2022

MTZ002-007-043-221800-
/O.CON.KMSO.WC.W.0001.000000T0000Z-220222T1800Z/
West Glacier Region-Butte/Blackfoot Region-
Potomac/Seeley Lake Region-
625 AM MST Tue Feb 22 2022

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* WHAT...Dangerously cold wind chills. Wind chills as low as 45 
  below zero.

* WHERE...Butte/Blackfoot Region, West Glacier Region and 
  Potomac/Seeley Lake Region.

* WHEN...Until 11 AM MST this morning.

* IMPACTS...The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

&&

$$

MTZ001-003-231200-
/O.EXT.KMSO.WC.Y.0002.000000T0000Z-220223T1200Z/
Kootenai/Cabinet Region-Flathead/Mission Valleys-
625 AM MST Tue Feb 22 2022

...WIND CHILL ADVISORY NOW IN EFFECT UNTIL 5 AM MST WEDNESDAY...

* WHAT...Very cold wind chills. Wind chills as low as 40 below 
  zero.

* WHERE...Highway 2 Kalispell to Libby, Highway 37 Eureka to 
  Libby, Highway 56 Bull Lake Road, Highway 93 Eureka to 
  Whitefish, Flathead Lake, Flathead Valley, Mission Valley, and 
  Polson.

* WHEN...Until 5 AM MST Wednesday.

* IMPACTS...The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

MTZ004>006-231200-
/O.EXT.KMSO.WC.Y.0002.000000T0000Z-220223T1200Z/
Lower Clark Fork Region-Missoula/Bitterroot Valleys-
Bitterroot/Sapphire Mountains-
625 AM MST Tue Feb 22 2022

...WIND CHILL ADVISORY NOW IN EFFECT UNTIL 5 AM MST WEDNESDAY...

* WHAT...Very cold wind chills. Wind chills as low as 40 below 
  zero.

* WHERE...Evaro Hill, Highway 200 Thompson Falls to Plains, 
  Highway 200 Trout Creek to Heron, I-90 Lookout Pass to Haugan, 
  Bitterroot Valley, Missoula, Highway 93 Sula to Lost Trail 
  Pass, and Lolo Pass.

* WHEN...Until 5 AM MST Wednesday.

* IMPACTS...The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

IDZ005-006-009-010-231200-
/O.EXT.KMSO.WC.Y.0002.000000T0000Z-220223T1200Z/
Northern Clearwater Mountains-Southern Clearwater Mountains-
Western Lemhi County-Eastern Lemhi County-
625 AM MST Tue Feb 22 2022 /525 AM PST Tue Feb 22 2022/

...WIND CHILL ADVISORY NOW IN EFFECT UNTIL 5 AM MST /4 AM PST/
WEDNESDAY...

* WHAT...Very cold wind chills. Wind chills as low as 35 below 
  zero.

* WHERE...Western Lemhi County, Eastern Lemhi County, Southern 
  Clearwater Mountains and Northern Clearwater Mountains.

* WHEN...Until 5 AM MST /4 AM PST/ Wednesday.

* IMPACTS...The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
977 
WWUS45 KMSO 221327
WSWMSO

URGENT - WINTER WEATHER MESSAGE
National Weather Service Missoula MT
627 AM MST Tue Feb 22 2022

MTZ002-007-043-231200-
/O.EXB.KMSO.WC.Y.0002.220222T1800Z-220223T1200Z/
/O.CON.KMSO.WC.W.0001.000000T0000Z-220222T1800Z/
West Glacier Region-Butte/Blackfoot Region-
Potomac/Seeley Lake Region-
627 AM MST Tue Feb 22 2022

...WIND CHILL WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...
...WIND CHILL ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 5 AM
MST WEDNESDAY...

* WHAT...For the Wind Chill Warning, dangerously cold wind 
  chills. Wind chills as low as 45 below zero. For the Wind 
  Chill Advisory, very cold wind chills expected. Wind chills as 
  low as 45 below zero.

* WHERE...West Glacier Region, Butte/Blackfoot Region and 
  Potomac/Seeley Lake Region.

* WHEN...For the Wind Chill Warning, until 11 AM MST this 
  morning. For the Wind Chill Advisory, from 11 AM this morning 
  to 5 AM MST Wednesday.

* IMPACTS...The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid outside activities if possible. When outside, make sure you
wear appropriate clothing, a hat, and gloves. 

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

&&

$$

MTZ001-003-231200-
/O.CON.KMSO.WC.Y.0002.000000T0000Z-220223T1200Z/
Kootenai/Cabinet Region-Flathead/Mission Valleys-
627 AM MST Tue Feb 22 2022

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST
WEDNESDAY...

* WHAT...Very cold wind chills. Wind chills as low as 40 below 
  zero.

* WHERE...Highway 2 Kalispell to Libby, Highway 37 Eureka to 
  Libby, Highway 56 Bull Lake Road, Highway 93 Eureka to 
  Whitefish, Flathead Lake, Flathead Valley, Mission Valley, and 
  Polson.

* WHEN...Until 5 AM MST Wednesday.

* IMPACTS...The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

MTZ004>006-231200-
/O.CON.KMSO.WC.Y.0002.000000T0000Z-220223T1200Z/
Lower Clark Fork Region-Missoula/Bitterroot Valleys-
Bitterroot/Sapphire Mountains-
627 AM MST Tue Feb 22 2022

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST
WEDNESDAY...

* WHAT...Very cold wind chills. Wind chills as low as 40 below 
  zero.

* WHERE...Evaro Hill, Highway 200 Thompson Falls to Plains, 
  Highway 200 Trout Creek to Heron, I-90 Lookout Pass to Haugan, 
  Bitterroot Valley, Missoula, Highway 93 Sula to Lost Trail 
  Pass, and Lolo Pass.

* WHEN...Until 5 AM MST Wednesday.

* IMPACTS...The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

IDZ005-006-009-010-231200-
/O.CON.KMSO.WC.Y.0002.000000T0000Z-220223T1200Z/
Northern Clearwater Mountains-Southern Clearwater Mountains-
Western Lemhi County-Eastern Lemhi County-
627 AM MST Tue Feb 22 2022 /527 AM PST Tue Feb 22 2022/

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST /4 AM
PST/ WEDNESDAY...

* WHAT...Very cold wind chills. Wind chills as low as 35 below 
  zero.

* WHERE...Western Lemhi County, Eastern Lemhi County, Southern 
  Clearwater Mountains and Northern Clearwater Mountains.

* WHEN...Until 5 AM MST /4 AM PST/ Wednesday.

* IMPACTS...The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$
078 
WWUS45 KMSO 230806
WSWMSO

URGENT - WINTER WEATHER MESSAGE
National Weather Service Missoula MT
106 AM MST Wed Feb 23 2022

MTZ001-003-231500-
/O.EXT.KMSO.WC.Y.0002.000000T0000Z-220223T1500Z/
Kootenai/Cabinet Region-Flathead/Mission Valleys-
106 AM MST Wed Feb 23 2022

...WIND CHILL ADVISORY NOW IN EFFECT UNTIL 8 AM MST THIS
MORNING...

* WHAT...Very cold wind chills. Wind chills as low as 20 below 
  zero.

* WHERE...Highway 2 Kalispell to Libby, Highway 37 Eureka to 
  Libby, Highway 56 Bull Lake Road, Highway 93 Eureka to 
  Whitefish, Flathead Lake, Flathead Valley, Mission Valley, and 
  Polson.

* WHEN...Until 8 AM MST this morning.

* IMPACTS...The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

MTZ004>006-231500-
/O.EXT.KMSO.WC.Y.0002.000000T0000Z-220223T1500Z/
Lower Clark Fork Region-Missoula/Bitterroot Valleys-
Bitterroot/Sapphire Mountains-
106 AM MST Wed Feb 23 2022

...WIND CHILL ADVISORY NOW IN EFFECT UNTIL 8 AM MST THIS
MORNING...

* WHAT...Very cold wind chills. Wind chills as low as 20 below 
  zero.

* WHERE...Evaro Hill, Highway 200 Thompson Falls to Plains, 
  Highway 200 Trout Creek to Heron, I-90 Lookout Pass to Haugan, 
  Bitterroot Valley, Missoula, Highway 93 Sula to Lost Trail 
  Pass, and Lolo Pass.

* WHEN...Until 8 AM MST this morning.

* IMPACTS...The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

IDZ005-006-009-010-231500-
/O.EXT.KMSO.WC.Y.0002.000000T0000Z-220223T1500Z/
Northern Clearwater Mountains-Southern Clearwater Mountains-
Western Lemhi County-Eastern Lemhi County-
106 AM MST Wed Feb 23 2022 /1206 AM PST Wed Feb 23 2022/

...WIND CHILL ADVISORY NOW IN EFFECT UNTIL 8 AM MST /7 AM PST/
THIS MORNING...

* WHAT...Very cold wind chills. Wind chills as low as 20 below 
  zero.

* WHERE...Western Lemhi County, Eastern Lemhi County, Southern 
  Clearwater Mountains and Northern Clearwater Mountains.

* WHEN...Until 8 AM MST /7 AM PST/ 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. 

&&

$$

MTZ002-007-043-231500-
/O.EXT.KMSO.WC.Y.0002.000000T0000Z-220223T1500Z/
West Glacier Region-Butte/Blackfoot Region-
Potomac/Seeley Lake Region-
106 AM MST Wed Feb 23 2022

...WIND CHILL ADVISORY NOW IN EFFECT UNTIL 8 AM MST THIS
MORNING...

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

* WHERE...Butte/Blackfoot Region, West Glacier Region and 
  Potomac/Seeley Lake Region.

* WHEN...Until 8 AM MST this morning.

* IMPACTS...The dangerously cold wind chills could cause 
  frostbite on exposed skin in as little as 10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

What forecasters said that day

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

NWS Missoula, MT wrote its last area forecast discussion before this wind chill advisory went out at Feb 21, 3:33 AM MST, 1 hour 38 minutes earlier.

Area forecast discussion, Feb 21, 3:33 AM MST, 1 hour 38 minutes before
Area Forecast Discussion
National Weather Service Missoula MT
333 AM MST Mon Feb 21 2022

.DISCUSSION...The arctic front has made its way across all of
western Montana and will move across central Idaho the rest of the
morning. A well organized short wave across Northwest Montana will
gradually move southward through the morning hours. The associated
moist air with this system interacting with the arctic front is
producing widespread snows across Central Idaho, West central and
and Southwest Montana. Strong gusty northeasterly wind combined
with several inches of snow will result in considerable blowing
snow and low visibilities. This will all make for a difficult
morning commute.

While snow has tapered off in the Flathead Valley and along the
continental divide in the Glacier NP region, strong gusty
northeast winds will continue bring blowing snow and low
visibilities through the morning hours.

Persistent snow will diminish around noon across western Montana
leaving behind snow showers for the remainder of the day.
Accumulating snows will continue through the entire afternoon
across central, then weather disturbance will finally move south
of the Northern Rockies.

Right on its heels a secondary push of very cold arctic air from
Alberta Canada will move across the continental divide into
western Montana and central Idaho. This deep arctic air will
significantly tighten temperature/pressure gradients resulting in
continued strong gusty northeast winds across the entire Northern
Rockies, especially the Flathead Valley. Areas along the divide
into Bad Rock Canyon and Kalispell can expect wind gusts over
40 mph late this afternoon and evening.

Gusty northeast winds will persist through Wednesday morning.
Extremely cold air with these winds will result in a lengthy
period of very low wind chills of 15 to 30 degrees below zero.
Even more dangerous wind chill readings of 30 to 40 degrees below
zero are likely along the continental divide which includes the
Glacier NP region, the Seeley/Swan valley, and southwest Montana
this evening through Wednesday morning.

This is the coldest polar dip of the year with Wednesday morning
being the coldest. Temperatures will be around 10 to 15 below
zero in western Montana. Even colder low temps of 15 to 25 degrees
below zero will occur along the divide into the Seeley/Swan valley
and southwest Montana.

Single digit to below zero low temperatures will occur through
Saturday morning. Temperatures won't return back to near normal
until next week.

 Wind Chill readings Tonight into Tuesday morning

Missoula        -22 to -28
Kalispell       -25 to -30
Butte           -30 to -35
West            -34 to -39
Seeley Lake     -35 to -40

Another weather disturbance will move through the region from
Canada Thursday and Friday bringing another round of
accumulating snows.

&&

.AVIATION...A low pressure system is making its way across
western Montana this morning. The warm moist air overrunning cold
arctic air that has established itself will continue to produce
snow impacting KMSO, KBTM through 21/1800z. Gusty northeasterly
winds will result in blowing snow. Expect low ceilings,
visibilites and mountain obscurations.
While snow has diminished at KGPI, strong northeast winds gusting
to 40 mph will continue the next 24 hours. Blowing snow from these
winds will reduce visibilites.
KSMN can expect snow through 21/2300z resulting in low ceilings,
visibilities and mountain obscurations.

&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...     Winter Storm Warning until 11 AM MST this morning
     Butte/Blackfoot Region.

     Wind Chill Warning from 11 PM this evening to 11 AM MST Tuesday
     Butte/Blackfoot Region...Potomac/Seeley Lake Region...West
     Glacier Region.

     Wind Chill Advisory from 11 AM this morning to 11 PM MST this
     evening Butte/Blackfoot Region...Potomac/Seeley Lake
     Region...West Glacier Region.

     Winter Weather Advisory until 11 AM MST this morning
     Bitterroot/Sapphire Mountains.

     Wind Chill Advisory from 8 PM this evening to 11 AM MST Tuesday
     Bitterroot/Sapphire Mountains...Lower Clark Fork Region...
     Missoula/Bitterroot Valleys.

     Winter Weather Advisory until 11 AM MST this morning
     Missoula/Bitterroot Valleys.

     Winter Weather Advisory until 11 AM MST this morning Lower Clark
     Fork Region.

     Winter Storm Warning until 11 AM MST this morning
     Flathead/Mission Valleys.

     Wind Chill Advisory from 5 PM this afternoon to 11 AM MST
     Tuesday Flathead/Mission Valleys...Kootenai/Cabinet Region.

     Winter Storm Warning until 11 AM MST this morning West Glacier
     Region.

     Winter Weather Advisory until 11 AM MST this morning
     Kootenai/Cabinet Region.

     Winter Storm Warning until 11 AM MST this morning Potomac/Seeley
     Lake Region.

ID...Wind Chill Advisory from 8 PM MST /7 PM PST/ this evening to 11
     AM MST /10 AM PST/ Tuesday Eastern Lemhi County...Northern
     Clearwater Mountains...Southern Clearwater Mountains...
     Western Lemhi County.

     Winter Weather Advisory until 10 AM PST this morning Lower Hells
     Canyon/Salmon River Region...Orofino/Grangeville Region.

     Winter Weather Advisory until 10 AM PST this morning Southern
     Clearwater Mountains.

     Winter Weather Advisory until 10 AM PST this morning Northern
     Clearwater Mountains.

&&

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 20, 5:46 PM MSTSpecial Weather StatementMSOSanders44 min
Feb 21, 5:11 AM MSTWind Chill WarningMSODeer Lodge, Flathead, Granite, Lake, Missoula, Powell and 1 more30 hr

Nearby

Wind Chill Advisories in Montana, 2022Wind Chill Advisories in Idaho, 2022Every wind chill advisory in 2022

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.