Wind Advisory 4, NWS Missoula, MT

027 
WWUS75 KMSO 112159
NPWMSO

URGENT - WEATHER MESSAGE
National Weather Service Missoula MT
359 PM MDT Mon Apr 11 2022

MTZ002-121500-
/O.EXP.KMSO.WI.Y.0004.000000T0000Z-220411T2200Z/
/O.CON.KMSO.HW.W.0002.220411T2200Z-220412T1500Z/
West Glacier Region-
359 PM MDT Mon Apr 11 2022

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 9 AM MDT TUESDAY...
...WIND ADVISORY WILL EXPIRE AT 4 PM MDT THIS AFTERNOON...

* WHAT...Northeast winds 25 to 35 mph with gusts up to 50 mph 
  expected, except 35 to 45 mph with gusts to 65 mph between 
  Ferndale and Swan Lake.

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

* WHEN...Through 9 AM MDT Tuesday.

* IMPACTS...Damaging winds will blow down trees and power lines. 
  Widespread power outages are expected. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

MTZ003-121500-
/O.CON.KMSO.HW.W.0002.000000T0000Z-220412T1500Z/
Flathead/Mission Valleys-
359 PM MDT Mon Apr 11 2022

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 9 AM MDT TUESDAY...

* WHAT...For the High Wind Warning, northeast winds 35 to 45 mph
  with gusts up to 55 mph expected. Gusts up to 70 mph east of
  Highways 206, 35 and 209, and also east side of Flathead Lake. 

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

* WHEN...For the High Wind Warning, from 2 PM this afternoon to 9
  AM MDT Tuesday.

* IMPACTS...Damaging winds will blow down trees and power lines. 
  Widespread power outages are expected. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

MTZ001-121500-
/O.CON.KMSO.HW.W.0002.220411T2200Z-220412T1500Z/
Kootenai/Cabinet Region-
359 PM MDT Mon Apr 11 2022

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 9 AM MDT TUESDAY...

* WHAT...Northeast winds 35 to 45 mph with gusts up to 70 mph 
  expected east of Highway 93 from the Canadian Border to 
  Whitefish. Elsewhere expect northeast winds 15 to 35 mph with 
  gusts up to 55 mph.

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

* WHEN...From 4 PM Monday to 9 AM MDT Tuesday.

* IMPACTS...Damaging winds will blow down trees and power lines. 
  Widespread power outages are expected. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

MTZ004-121200-
/O.CON.KMSO.HW.W.0002.220411T2300Z-220412T1200Z/
Lower Clark Fork Region-
359 PM MDT Mon Apr 11 2022

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 AM MDT TUESDAY...

* WHAT...Northeast winds 15 to 35 mph with gusts up to 55 mph 
  expected.

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

* WHEN...From 5 PM Monday to 6 AM MDT Tuesday.

* IMPACTS...Damaging winds will blow down trees and power lines. 
  Widespread power outages are expected. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

MTZ005-120600-
/O.CON.KMSO.HW.W.0002.000000T0000Z-220412T0600Z/
Missoula/Bitterroot Valleys-
359 PM MDT Mon Apr 11 2022

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT
TONIGHT...

* WHAT...Northeast winds 25 to 35 mph with gusts up to 55 mph 
  expected in the Missoula Valley. Northeast wind 35 to 45 mph 
  with gusts to 60 mph in the Rattlesnake area. North winds 25 
  to 35 mph in the Bitterroot Valley developing late.

* WHERE...Missoula/Bitterroot Valleys.

* WHEN...From 2 PM Monday to midnight MDT Monday night.

* IMPACTS...Damaging winds will blow down trees and power lines. 
  Widespread power outages are expected. Travel will be 
  difficult, especially for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People should avoid being outside in forested areas and around
trees and branches. If possible, remain in the lower levels of
your home during the windstorm, and avoid windows. Use caution if
you must drive.

&&

$$

Area Forecast Discussion
National Weather Service Missoula MT
300 AM MDT Mon Apr 11 2022

.DISCUSSION...
The complex and high-impact wind event and winter
storm remain on track beginning today and continuing through
Tuesday.

A slow-moving circulation developed over Flathead Lake overnight,
resulting in snow accumulations, especially on the east side of
Flathead Lake, along Highway 35 through Creston. Impacts from this
area of snow will linger through the morning commute so a winter
weather advisory has been issued.

An easterly pressure gradient is developing in western Montana
which will strengthen today and tonight resulting in a rare April
easterly wind event. By 8 pm this evening, the HREF ensemble mean
shows widespread wind gusts from Missoula north to the Canadian
border of 40-50 mph. The west slopes of north-south-oriented
mountain ranges, such as the Mission Mountains, show even stronger
winds of over 60 mph. High wind warnings remain in effect.
Falling trees are expected and power outages are possible.

Snow will also impact much of the region and the approaching low
pressure system is already producing snow at low elevations in
Oregon. The track of the low remains favorable for impactful snow
throughout most of Idaho County, southern Ravalli County, Lemhi
County, and Granite/Deer lodge/Powell/Silver Bow counties, which
all have either a winter storm warning or winter weather advisory
in effect from this afternoon through Tuesday morning. The
combination of a refreeze on roadways, snow intensities of at
least 1-2 inches per hour, and/or gusty winds will cause difficult
travel conditions. Most of the warned areas have a high (greater
than 80 percent) probability of 4-6 inches of snow, and locations
along the Divide including Homestake/MacDonald passes and Butte
have a greater than 80 percent probability of over 8 inches of
snow by Tuesday morning.

Low pressure will pass to the east during Tuesday, leaving most
places with high temperatures in the low 30s or colder and
decreasing snow showers.

An active weather pattern remains for the rest of the week with
below-average temperatures and increasing snow chances to end the
week.

&&

.AVIATION...An organized area of snow showers will continue to
impact the Flathead Valley through at least 11/1200Z, with
visibility reductions of 1/2SM or less at times for KGPI. A closed
low pressure system will track across eastern Oregon this
afternoon, reaching north-central Idaho by 12/0000Z. Strong and
potentially damaging northeast-east winds will develop across
northwest Montana and the Missoula valley by 11/2100Z and will
continue through 12/1200Z. Widespread snow will impact north-
central Idaho and southwest Montana this afternoon into Tuesday
morning, where winter storm warnings remain in effect.

&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...Winter Storm Warning from 4 PM this afternoon to noon MDT
     Tuesday Butte/Blackfoot Region.

     Winter Storm Warning from 3 PM this afternoon to noon MDT
     Tuesday Bitterroot/Sapphire Mountains.

     High Wind Warning from 2 PM this afternoon to midnight MDT
     tonight Missoula/Bitterroot Valleys.

     Winter Weather Advisory from 3 PM this afternoon to 9 AM MDT
     Tuesday Missoula/Bitterroot Valleys.

     High Wind Warning from 5 PM this afternoon to 6 AM MDT Tuesday
     Lower Clark Fork Region.

     High Wind Warning from 2 PM this afternoon to 9 AM MDT Tuesday
     Flathead/Mission Valleys.

     Winter Weather Advisory until 9 AM MDT this morning
     Flathead/Mission Valleys.

     Wind Advisory from 9 AM this morning to 2 PM MDT this afternoon
     Flathead/Mission Valleys.

     High Wind Warning from 4 PM this afternoon to 9 AM MDT Tuesday
     West Glacier Region.

     Wind Advisory from 9 AM this morning to 4 PM MDT this afternoon
     West Glacier Region.

     High Wind Warning from 4 PM this afternoon to 9 AM MDT Tuesday
     Kootenai/Cabinet Region.

     Winter Weather Advisory from 6 PM this evening to 9 AM MDT
     Tuesday Potomac/Seeley Lake Region.

ID...Winter Storm Warning from 6 PM this evening to noon MDT Tuesday
     Eastern Lemhi County...Western Lemhi County.

     Winter Weather Advisory from 2 PM this afternoon to 11 PM PDT
     this evening Northern Clearwater Mountains.

     Winter Storm Warning from 2 PM this afternoon to 11 AM PDT
     Tuesday Lower Hells Canyon/Salmon River Region.

     Winter Storm Warning from 2 PM this afternoon to 11 AM PDT
     Tuesday Southern Clearwater Mountains.

     Winter Storm Warning from 2 PM this afternoon to 11 AM PDT
     Tuesday Orofino/Grangeville Region.

&&