Winter Storm Warning 5, NWS Spokane, WA

608 
WWUS46 KOTX 191056
WSWOTX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Spokane WA
256 AM PST Sat Feb 19 2022

WAZ048-192315-
/O.CON.KOTX.WS.W.0005.220219T1800Z-220221T0000Z/
Western Chelan County-
Including the cities of Holden Village, Stehekin, and Stevens
Pass
256 AM PST Sat Feb 19 2022

...WINTER STORM WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 
4 PM PST SUNDAY...

* WHAT...Heavy snow. Total snow accumulations between 15 and 22 
  inches at the crest with 10 to 15 inches elsewhere. Snow will 
  start mid morning with slushy accumulations through the afternoon. 
  During the evening and overnight hours snowfall rates of an inch 
  an hour will be likely, with a brief burst of 2 inches an hour 
  possible during the evening.

* WHERE...Stevens Pass and Holden Village.

* WHEN...From 10 AM this morning to 4 PM PST Sunday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous by Saturday evening. Travel 
  could be very difficult.

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 for 
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

LN

646 
WWUS46 KOTX 192005
WSWOTX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Spokane WA
1205 PM PST Sat Feb 19 2022

WAZ048-200700-
/O.CON.KOTX.WS.W.0005.000000T0000Z-220221T0000Z/
Western Chelan County-
Including the cities of Holden Village, Stehekin, and Stevens
Pass
1205 PM PST Sat Feb 19 2022

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST SUNDAY...

* WHAT...Heavy snow. Total snow accumulations between 15 and 24 
  inches at the crest with 10 to 15 inches elsewhere. Snow will 
  increase this afternoon with slushy accumulations. During the 
  evening and overnight hours snowfall rates of an inch an hour will 
  be likely, with a brief burst of 2 inches an hour possible during 
  the evening.

* WHERE...Holden Village, Stevens Pass.

* WHEN...Until 4 PM PST Sunday.

* IMPACTS...Roads, and especially bridges and overpasses, will 
  likely become slick and hazardous by Saturday evening. Travel 
  could be very difficult.

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 for 
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

IDZ004-200700-
/O.NEW.KOTX.WW.Y.0010.220220T0600Z-220221T1800Z/
Central Panhandle Mountains-
Including the cities of Lookout Pass, Dobson Pass, and Mullan
1205 PM PST Sat Feb 19 2022

...WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 10 
AM PST MONDAY ABOVE 3000 FEET...

* WHAT...Snow. Total snow accumulations between 7 and 13 inches 
  above 3000 feet.  Snow levels will drop to the valley floors 
  Sunday Night with 2 to 4 inches possible by Monday afternoon.

* WHERE...Lookout Pass, Dobson Pass, and Mullan.

* WHEN...From 10 PM this evening to 10 AM PST Monday.

* IMPACTS...Expect winter driving conditions over the mountain 
  passes late this evening into Sunday afternoon. Winter driving 
  conditions may develop in the lower elevations Sunday Night into 
  Monday.

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.

&&

$$

WAZ031-200700-
/O.NEW.KOTX.WW.Y.0010.220220T0600Z-220221T1200Z/
Northeast Blue Mountains-
Including the cities of Mountain Road, Anatone, Peola, and
Cloverland Road
1205 PM PST Sat Feb 19 2022

...WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 4 AM 
PST MONDAY...

* WHAT...Snow expected. Total snow accumulations 2 to 4 inches 
  Anatone area and 4 to 9 inches in the mountains west of Anatone. 
  Winds gusting as high as 35 mph.

* WHERE...Mountain Road, Anatone, Peola, and Cloverland Road.

* WHEN...From 10 PM this evening to 4 AM PST Monday.

* IMPACTS...Expect winter driving conditions in the Blue Mountains. 

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.

&&

$$

JW

565 
WWUS46 KOTX 200148
WSWOTX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Spokane WA
548 PM PST Sat Feb 19 2022

WAZ048-201400-
/O.CON.KOTX.WS.W.0005.000000T0000Z-220221T0000Z/
Western Chelan County-
Including the cities of Holden Village, Stehekin, and Stevens
Pass
548 PM PST Sat Feb 19 2022

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST SUNDAY...

* WHAT...Heavy snow. Snow accumulations between 15 and 24 inches 
  along the Cascade Crest with 10 to 15 inches elsewhere.

* WHERE...Holden Village, Stehekin, and Stevens Pass.

* WHEN...Until 4 PM PST Sunday.

* IMPACTS...Travel could be very difficult to impossible. Gusty 
  winds could bring down tree branches.

* ADDITIONAL DETAILS...Snowfall rates of 1 to 2 inches per hour will 
  be likely this evening and early Sunday morning leading to rapid 
  increases in snow accumulation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Motorists should be prepared for winter driving conditions at 
Stevens Pass tonight. The latest road conditions for the state you 
are calling from can be obtained by calling 5 1 1.

&&

$$

IDZ004-201400-
/O.CON.KOTX.WW.Y.0010.220220T0600Z-220221T1800Z/
Central Panhandle Mountains-
Including the cities of Lookout Pass, Dobson Pass, and Mullan
548 PM PST Sat Feb 19 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 10 PM THIS EVENING 
TO 10 AM PST MONDAY ABOVE 3000 FEET...

* WHAT...Snow expected Above 3000 feet. Total snow accumulations 
  between 7 and 13 inches.

* WHERE...Lookout Pass, Dobson Pass, and Mullan.

* WHEN...From 10 PM this evening to 10 AM PST Monday.

* IMPACTS...Expect winter driving conditions over the mountain 
  passes late this evening into Sunday afternoon. Winter driving 
  conditions may develop in the lower elevations Sunday Night into 
  Monday.

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.

&&

$$

WAZ031-201400-
/O.CON.KOTX.WW.Y.0010.220220T0600Z-220221T1200Z/
Northeast Blue Mountains-
Including the cities of Mountain Road, Anatone, Peola, and
Cloverland Road
548 PM PST Sat Feb 19 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 10 PM THIS EVENING 
TO 4 AM PST MONDAY...

* WHAT...Snow expected. Total snow accumulations 2 to 4 inches 
  Anatone area and 4 to 9 inches in the mountains west of Anatone. 
  Winds gusting as high as 35 mph.

* WHERE...Mountain Road, Anatone, Peola, and Cloverland Road.

* WHEN...From 10 PM this evening to 4 AM PST Monday.

* IMPACTS...Expect winter driving conditions in the Blue Mountains. 

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.

&&

$$

GKOCH

514 
WWUS46 KOTX 201230
WSWOTX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Spokane WA
430 AM PST Sun Feb 20 2022

WAZ048-202300-
/O.CON.KOTX.WS.W.0005.000000T0000Z-220221T0000Z/
Western Chelan County-
Including the cities of Holden Village, Stehekin, and Stevens
Pass
430 AM PST Sun Feb 20 2022

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST THIS 
AFTERNOON...

* WHAT...Heavy snow. Additional snow accumulations between 2 and 6 
  inches.

* WHERE...Stevens Pass and Holden Village.

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

* IMPACTS...Plan on slippery road conditions with difficult travel. 

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 for 
the state you are calling from can be obtained by calling 5 1 1.

&&

$$

IDZ027-202300-
/O.EXB.KOTX.WW.Y.0010.220221T0000Z-220222T0000Z/
Lewis and Southern Nez Perce Counties-
Including the cities of Nezperce, Soldiers Meadow Road,
Craigmont, Winchester, and Kamiah
430 AM PST Sun Feb 20 2022

...WINTER WEATHER ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 
PM PST MONDAY...

* WHAT...Snow expected. Total snow accumulations between 2 and 5 
  inches.

* WHERE...Nezperce, Soldiers Meadow Road, Craigmont, Winchester, and 
  Kamiah.

* WHEN...From 4 PM this afternoon to 4 PM PST Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Monday morning commute.

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.

&&

$$

IDZ004-202300-
/O.CON.KOTX.WW.Y.0010.000000T0000Z-220221T1800Z/
Central Panhandle Mountains-
Including the cities of Lookout Pass, Dobson Pass, and Mullan
430 AM PST Sun Feb 20 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST MONDAY 
ABOVE 3000 FEET...

* WHAT...Snow Above 3000 feet. Additional snow accumulations between 
  4 and 12 inches.

* WHERE...Lookout Pass, Dobson Pass, and Mullan.

* WHEN...Until 10 AM PST Monday.

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

* ADDITIONAL DETAILS...Elevations below 3000 feet could see 1 to 3 
  inches of snow.

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.

&&

$$

WAZ031-202300-
/O.CON.KOTX.WW.Y.0010.000000T0000Z-220221T1200Z/
Northeast Blue Mountains-
Including the cities of Mountain Road, Anatone, Peola, and
Cloverland Road
430 AM PST Sun Feb 20 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST MONDAY...

* WHAT...Snow expected. Additional snow accumulations 1 to 3 inches 
  Anatone area and 3 to 7 inches in the mountains west of Anatone. 
  Winds gusting as high as 35 mph.

* WHERE...Mountain Road, Anatone, Peola, and Cloverland Road.

* WHEN...Until 4 AM PST Monday.

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

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.

&&

$$

LN

833 
WWUS46 KOTX 202044
WSWOTX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Spokane WA
1244 PM PST Sun Feb 20 2022

WAZ048-210000-
/O.CON.KOTX.WS.W.0005.000000T0000Z-220221T0000Z/
Western Chelan County-
Including the cities of Holden Village, Stehekin, and Stevens
Pass
1244 PM PST Sun Feb 20 2022

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST THIS 
AFTERNOON...

* WHAT...Heavy snow. Additional snow accumulations up to one inch.

* WHERE...Stevens Pass.

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

* IMPACTS...Plan on slippery road conditions with difficult travel. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Motorists should be prepared for winter driving conditions at 
Stevens Pass. The latest road conditions for the state you are 
calling from can be obtained by calling 5 1 1.

&&

$$

IDZ004-210445-
/O.CON.KOTX.WW.Y.0010.000000T0000Z-220221T1800Z/
Central Panhandle Mountains-
Including the cities of Lookout Pass, Dobson Pass, and Mullan
1244 PM PST Sun Feb 20 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST MONDAY 
ABOVE 3000 FEET...

* WHAT...Snow Above 3000 feet. Additional snow accumulations between 
  3 and 8 inches.

* WHERE...Lookout Pass, Dobson Pass, and Mullan.

* WHEN...Until 10 AM PST Monday.

* IMPACTS...Expect winter driving conditions over the mountain 
  passes late this evening into Sunday afternoon. Winter driving 
  conditions may develop in the lower elevations Sunday Night into 
  Monday.

* ADDITIONAL DETAILS...Elevations below 3000 feet could see 1 to 3 
  inches of snow.

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.

&&

$$

WAZ031-210445-
/O.CON.KOTX.WW.Y.0010.000000T0000Z-220221T1200Z/
Northeast Blue Mountains-
Including the cities of Mountain Road, Anatone, Peola, and
Cloverland Road
1244 PM PST Sun Feb 20 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST MONDAY...

* WHAT...Snow expected. Additional snow accumulations 1 to 3 inches. 
  Winds gusting as high as 35 mph.

* WHERE...Mountain Road, Anatone, Peola, and Cloverland Road.

* WHEN...Until 4 AM PST Monday.

* IMPACTS...Expect winter driving conditions in the Blue Mountains. 

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.

&&

$$

IDZ027-210445-
/O.CON.KOTX.WW.Y.0010.220221T0000Z-220222T0000Z/
Lewis and Southern Nez Perce Counties-
Including the cities of Nezperce, Soldiers Meadow Road,
Craigmont, Winchester, and Kamiah
1244 PM PST Sun Feb 20 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THIS 
AFTERNOON TO 4 PM PST MONDAY...

* WHAT...Snow expected. Total snow accumulations between 2 and 5 
  inches.

* WHERE...Nezperce, Soldiers Meadow Road, Craigmont, Winchester, and 
  Kamiah.

* WHEN...From 4 PM this afternoon to 4 PM PST Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Monday morning commute.

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.

&&

$$

JW

905 
WWUS46 KOTX 202216
WSWOTX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Spokane WA
216 PM PST Sun Feb 20 2022

WAZ048-202330-
/O.CAN.KOTX.WS.W.0005.000000T0000Z-220221T0000Z/
Western Chelan County-
Including the cities of Holden Village, Stehekin, and Stevens
Pass
216 PM PST Sun Feb 20 2022

...WINTER STORM WARNING IS CANCELLED...

Light accumulations will remain possible through tonight but the 
threat for additional significant accumulations has ended.

$$

IDZ004-211200-
/O.CON.KOTX.WW.Y.0010.000000T0000Z-220221T1800Z/
Central Panhandle Mountains-
Including the cities of Lookout Pass, Dobson Pass, and Mullan
216 PM PST Sun Feb 20 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST MONDAY 
ABOVE 3000 FEET...

* WHAT...Snow Above 3000 feet. Additional snow accumulations between 
  2 and 6 inches.

* WHERE...Lookout Pass, Dobson Pass, and Mullan.

* WHEN...Until 10 AM PST Monday.

* IMPACTS...Expect winter driving conditions at times through Monday 
  morning.

* ADDITIONAL DETAILS...Elevations below 3000 feet could see 1 to 3 
  inches of snow.

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.

&&

$$

WAZ031-211200-
/O.CON.KOTX.WW.Y.0010.000000T0000Z-220221T1200Z/
Northeast Blue Mountains-
Including the cities of Mountain Road, Anatone, Peola, and
Cloverland Road
216 PM PST Sun Feb 20 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST MONDAY...

* WHAT...Snow expected. Additional snow accumulations 1 to 3 inches. 
  Winds gusting as high as 35 mph.

* WHERE...Mountain Road, Anatone, Peola, and Cloverland Road.

* WHEN...Until 4 AM PST Monday.

* IMPACTS...Expect winter driving conditions in the Blue Mountains. 

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.

&&

$$

IDZ027-211200-
/O.CON.KOTX.WW.Y.0010.220221T0000Z-220222T0000Z/
Lewis and Southern Nez Perce Counties-
Including the cities of Nezperce, Soldiers Meadow Road,
Craigmont, Winchester, and Kamiah
216 PM PST Sun Feb 20 2022

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST MONDAY...

* WHAT...Snow expected. Total snow accumulations between 2 and 5 
  inches.

* WHERE...Nezperce, Soldiers Meadow Road, Craigmont, Winchester, and 
  Kamiah.

* WHEN...Until 4 PM PST Monday.

* IMPACTS...Plan on slippery road conditions. 

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.

&&

$$

JW

Area Forecast Discussion
National Weather Service Spokane WA
912 AM PST Fri Feb 18 2022

.SYNOPSIS...
Dry and mild weather will continue today. A cold front on Saturday
will bring a chance of valley rain and snow and mountain snow to
the region. There is a good chance that the mountains will
receive moderate to locally heavy snow this weekend in the Cascade
crest and Idaho Panhandle. Much colder temperatures are expected
next week.

&&

.DISCUSSION...

...Snow returns to the mountains this weekend followed by colder
temperatures next week...

Today through Saturday: Winds have remained elevated through the
night across parts Chelan and western Grant county. This has kept
temperatures up in 40s. Given winds will likely continue over the
next several hours, have adjusted temperatures...min temps this
morning and the forecasted highs for today. 850mb temps do cool a
few degrees, but given the last several days we have seen temps
above NBM values, have wagered today will be the same.

One more day of ridging with dry conditions. Temperatures will be
about 5 to 10 degrees above average. Warmest temps will be across
the Cascade valleys into the Columbia Basin and Palouse/LC region
w temps in the upper 40s to mid 50s. Meanwhile more cloud cover
extending from the Okanogan Valley east to the ID/MT border and
down towards Spokane/CdA will keep temps in the lower to mid 40s.

Saturday the ridge begins to flatten as a cold front moves through
the area. High res models are showing precip moving into the
Cascades during the morning and then moving east into northeastern
WA mid morning and into the ID Panhandle by afternoon.
Precipitation type through the morning will be snow. During the
afternoon, snow will mainly be confined to the mountains above
about 3k ft with rain in the valleys, maybe mixed with snow but
accumulations would be minor if that.

Winds increase Saturday afternoon across the Wenatchee Valley
into the Columbia Basin, Palouse and West Plains. Gusts 25-35 mph
is expected. The winds remain elevated through the evening and
overnight hours from east of a line from Davenport to the Tri
Cities to just east of the ID border.

Saturday Night through Sunday: Snow will continue at Stevens Pass.
The heaviest accumulation will occur through the evening hours.
Given the lack of snow in the mountains for the last month, and
the potential to see 10-14 inches at the Pass, have decided to
issue a winter storm watch starting Sat morning and continuing
through Sunday afternoon.

Best chances for precip will be across the Cascades as well as
extreme eastern WA and the ID Panhandle. Late Sat night into Sun
there could be some light valley snow, but accumulations will
largely be a tenth of an inch or less. The 'big winners' could be
Sandpoint and Kellogg where they could see 1-2 inches of snow
through Sun afternoon. As the trough digs into the Pac NW, we will
see 500 mb temps of -35C. Guidance is suggesting enough
instability for some locally brief heavy showers in the afternoon.
Is thunder possible? Perhaps, but not confident enough to add it
to the forecast. Looks like the best instability is from the
Palouse east into the Clearwater mountains. /Nisbet

...Strong Arctic cold front to deliver blustery winds and possibly
record cold temperatures between...

Sunday night through Wednesday....Big weather changes are afoot
during this period as we see a late season brush with winter. The
culprit will be an amplifying ridge of high pressure around 145w
with a subsequent deepening of a trough over the much of the
northwestern US. This deepening will send two disturbances
southward through the Inland NW. The first one comes through from
the on Sunday but gets hung up over SE WA and the ID Panhandle
overnight as a stronger system moves in from the north on Monday
into early Tuesday. This second system won’t contain as much
moisture as the first, however it will be the more dynamic of the
two as an arctic jet dives well south of the region and a strong
back door cold front tracks SW over the Continental Divide and
down the Okanogan Valley. This will change the predominant
precipitation type from any rain or rain/snow mix to all snow. It
will also deliver bitter winds and some of the coldest
temperatures we have seen this winter. It will feel especially
cold considering the relatively warm and dry weather of late.

*Precipitation...Between Sunday night through early Tuesday
 evening precipitation amounts should be relatively light, with
 anywhere from a few hundredths to around a tenth of an inch over
 most of the SE third of WA and much of the ID Panhandle.
 Meanwhile heavier amounts are expected to occur over Clearwaters,
 Blue Mountains and locations south of the Silver Valley in
 Shoshone County. Most of this will fall in the form of snow or
 possibly a brief rain/snow mix followed by all snow as 850 mb
 temperatures plunge from -1 to -3c Sunday evening down to -6 to
 -12c by Monday afternoon. Pinning down snow amounts with this
 arctic front could prove difficult as much will depend on how
 fast it moves and whether it will get hung up or not. Typically
 this isn’t the case, as backdoor cold fronts are fairly
 progressive. Nonetheless we suspect most locations over the
 eastern third of Washington and north Idaho will receive
 measurable snow. The biggest totals will occur with the heaviest
 precipitation totals over the southern half of the ID Panhandle
 into the Blue Mountains. This translates to amounts of 2-4
 inches. Right now we have the Spokane/CdA area with snow amounts
 around an inch or so, with values between 1-2 inches for the
 Palouse and into the LC Valley. Meanwhile amounts on the Camas
 Prairie and Lookout Pass are around 3-4 inches. Across central WA
 we are looking at smaller amounts. The arctic boundary will push
 into a fairly unstable air mass so we cannot rule out the
 possibility of brief but intense snow squalls. But more on that
 later as we can leverage some higher resolution models.

*Cold and wind...While the premise of widespread significant
 snows is small, the bigger and more widespread impact will be the
 intrusion of arctic air accompanied by stiff north to northeast
 winds. The winds will be first to arrive over the northern
 Purcell Trench on Monday morning and spreading down the Okanogan
 Valley and Columbia Basin later in the day over overnight. The
 winds will then continue into Tuesday or Tuesday evening. There
 are significant differences with model timing and strength, but
 our confidence is high eventually most locations will be subject
 to blustery north to northeast winds. Right now we have gusts
 ranging from 25-40 mph over much of the Inland NW, but the NBM
 and GFS have been consistent with producing the strongest winds
 over the eastern Columbia Basin. Not sure if this will pan out
 since the Purcell Trench and Okanogan Valleys are quite effective
 at funneling this cold air so we have edited the forecast
 accordingly. Meanwhile these winds will plunge 850 mb temps to
 some of the coldest (if not the coldest) readings this year.
 Values from the ensembles range from -13 to -18c on Tuesday. This
 will possibly translate to high temperatures in the 20s to mid
 30s on Monday and in the 20s for most locations on Tuesday.
 Meanwhile the overnight lows should drop into the single digits,
 however for protected locations with fresh snow they could very
 well dip into the negative numbers. So the combination of
 blustery winds and cold temperatures will spell even colder wind
 chill values. Many locations could see values in the -5 to -15f
 range between Monday night and Tuesday. Based on how warm it’s
 been of late, this will likely feel colder than it would in the
 heart of winter. So speaking of cold temperatures, we could very
 well see records broken for this time of year. The forecast highs
 of in the 20s could break records in Pullman, Wenatchee,
 Lewiston, Winthrop, and a few other locations. Many of these
 records were set in 2018.

Wednesday night into Friday...The arctic air mass begins to
slowly moderate with much lighter winds. The weather will likely
remain dry and clear. The next chance of any precipitation, and it
is a small one, will either arrive late Thursday or Friday as the
offshore ridge begins to near the coast and allows a weak system
to pass over the top of it. fx

&&

.AVIATION...
18Z TAFS: Dry northwest flow remains over the region through 00z
Saturday with most terminals experiencing VFR skies. A stratus
deck established in the valleys of NE Washington will linger into
the early afternoon with a mix of IFR/MVFR conditions at Deer Park
and Colville. The stratus deck is within 5-10 miles of KGEG as of
17z this morning, but south winds should keep it from moving in. Clouds
will increase, thicken and begin to lower after 03Z as the next
weather system approaches the area. There is some potential for
redevelopment of stratus overnight over NE Washington into the
Idaho Panhandle, but current HREF probabilities of sub VFR
conditions are less than 50% for KGEG, KSFF, and KCOE so kept
prevailing CIGS VFR. JW

&&

.PRELIMINARY POINT TEMPS/POPS...
Spokane        45  31  43  29  42  21 /   0   0  60  20  20  20
Coeur d'Alene  44  31  42  30  39  18 /   0   0  80  40  50  30
Pullman        48  32  46  33  40  26 /   0   0  50  40  60  40
Lewiston       54  34  53  39  47  32 /   0   0  20  30  60  30
Colville       41  27  40  25  41  19 /   0   0  50  10  10  10
Sandpoint      40  31  38  30  37  17 /   0   0  80  50  60  40
Kellogg        42  32  40  31  35  17 /   0   0  80  70  80  60
Moses Lake     46  28  48  29  46  25 /   0   0  10   0   0   0
Wenatchee      53  32  48  31  44  26 /   0   0   0  30  10  10
Omak           41  29  41  26  41  23 /   0   0   0  10   0   0

&&

.OTX WATCHES/WARNINGS/ADVISORIES...
ID...None.
WA...Winter Storm Watch from Saturday morning through Sunday
     afternoon for Western Chelan County.

&&

Hazardous Weather Outlook
National Weather Service Spokane WA
604 AM PST Fri Feb 18 2022

WAZ034-035-041-043-044-047-049-191415-
Moses Lake Area-Upper Columbia Basin-Wenatchee Area-
Okanogan Valley-Waterville Plateau-Central Chelan County-
Western Okanogan County-
604 AM PST Fri Feb 18 2022

This Hazardous Weather Outlook is for portions of Central
Washington...East Central Washington and North Central
Washington.

.DAY ONE...TODAY AND TONIGHT

No hazardous weather is expected tonight.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

An Arctic push from the north will bring blustery winds with cold
wind chills Monday night into Tuesday morning.

IDZ001>004-026-027-WAZ031>033-036>038-048-191415-
Northern Panhandle-Coeur d'Alene Area-Idaho Palouse-
Central Panhandle Mountains-Lewiston Area-
Lewis and Southern Nez Perce Counties-Northeast Blue Mountains-
Lower Garfield and Asotin Counties-Washington Palouse-
Spokane Area-Northeast Mountains-Okanogan Highlands-
Western Chelan County-
604 AM PST Fri Feb 18 2022

This Hazardous Weather Outlook is for portions of North Idaho...
North Central Idaho...North Central Washington...Northeast
Washington and Southeast Washington.

.DAY ONE...TODAY AND TONIGHT

No hazardous weather is expected tonight.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

A return of snow in the mountains and rain or snow at times for
the lowlands is expected Saturday and Sunday. Moderate to heavy
snow may accumulate over the mountain passes resulting in travel
impacts, especially Saturday night and Sunday morning.

In addition, a modified Arctic air mass will push in across the
region Sunday night into Monday. Snow showers will be possible
along the Arctic front and rapidly dropping temperatures may lead
to a flash freeze of moisture on road surfaces. Bitterly cold wind
chills will be possible Monday night into Tuesday morning
increasing the risk for hypothermia and frostbite for anyone
exposed to the elements without proper winter clothing.