Winter Storm Warning 10, NWS Boise, ID

968 
WWUS45 KBOI 270343
WSWBOI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Boise ID
843 PM MST Sun Dec 26 2021

IDZ028-271400-
/O.CON.KBOI.WC.W.0001.211228T0600Z-211228T1800Z/
/O.CON.KBOI.WW.Y.0019.000000T0000Z-211227T1800Z/
Camas Prairie-
843 PM MST Sun Dec 26 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
MONDAY...
...WIND CHILL WARNING REMAINS IN EFFECT FROM 11 PM MONDAY TO
11 AM MST TUESDAY...

* WHAT...For the Wind Chill Warning, dangerously cold wind 
  chills expected. Wind chills as low as 25 below zero. For the 
  Winter Weather Advisory, snow. Additional snow accumulations 
  of 6 to 12 inches. Wind gusts to 25 mph will cause areas of 
  blowing and drifting and reduced visibility.

* WHERE...Camas Prairie zone.

* WHEN...For the Wind Chill Warning, from 11 PM Monday to 11 AM 
  MST Tuesday. For the Winter Weather Advisory, until 11 AM MST 
  Monday.

* IMPACTS...Travel could be very difficult. Wind chill can cause 
  frostbite on exposed skin in as little as 30 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Slow down and use caution while traveling. 

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

ORZ063-271400-
/O.CON.KBOI.WS.W.0009.000000T0000Z-211227T1800Z/
Malheur County-
843 PM MST Sun Dec 26 2021 /743 PM PST Sun Dec 26 2021/

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST /10 AM
PST/ MONDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 8 
  inches. Wind gusts as high as 40 mph will cause widespread 
  blowing and drifting with reduced visibility especially near 
  the Nevada border.

* WHERE...Southern half of Malheur County zone.

* WHEN...From 5 PM MST /4 PM PST/ this afternoon to 11 AM MST 
  /10 AM PST/ Monday.

* IMPACTS...Travel could become very difficult. Areas of blowing 
  snow will significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

IDZ030-271400-
/O.CON.KBOI.WS.W.0009.211227T1800Z-211228T0600Z/
Southern Twin Falls County-
843 PM MST Sun Dec 26 2021

...WINTER STORM WARNING REMAINS IN EFFECT FROM 11 AM TO 11 PM MST
MONDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 
  10 inches. Wind gusts to 35 mph will cause areas of blowing 
  and drifting and reduced visibility.

* WHERE...Southern Twin Falls County zone.

* WHEN...From 11 AM to 11 PM MST Monday.

* IMPACTS...Travel could be very difficult. Areas of blowing 
  snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

IDZ015-271400-
/O.CON.KBOI.WS.W.0010.000000T0000Z-211228T0600Z/
Southwest Highlands-
843 PM MST Sun Dec 26 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST
MONDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 
  10 inches. Wind gusts to 40 mph will cause widespread blowing 
  and drifting and reduced visibility.

* WHERE...Southwest Idaho Highlands zone.

* WHEN...From 5 PM this afternoon to 11 PM MST Monday.

* IMPACTS...Travel could be very difficult to impossible. Areas 
  of blowing snow will significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

IDZ029-271400-
/O.CON.KBOI.WS.W.0009.000000T0000Z-211228T0000Z/
Owyhee Mountains-
843 PM MST Sun Dec 26 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST MONDAY...

* WHAT...Heavy snow. Additional snow accumulations of 6 to 12 
  inches, except up to 18 inches over the highest mountains. 
  Wind gusts as high as 35 mph will cause blowing and drifting 
  and reduced visibility.

* WHERE...Owyhee Mountains zone.

* WHEN...Until 5 PM MST Monday.

* IMPACTS...Travel could be very difficult to impossible. Areas 
  of blowing snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

IDZ014-271400-
/O.EXT.KBOI.WW.Y.0019.211227T0400Z-211227T1800Z/
Upper Treasure Valley-
843 PM MST Sun Dec 26 2021

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 11 AM MST MONDAY...

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

* WHERE...Upper Treasure Valley.

* WHEN...Until 11 AM MST Monday.

* IMPACTS...Travel could be very difficult. Areas of blowing 
  snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

IDZ016-271400-
/O.CON.KBOI.WW.Y.0019.000000T0000Z-211228T0600Z/
Western Magic Valley-
843 PM MST Sun Dec 26 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST
MONDAY...

* WHAT...Snow. Additional snow accumulations of 2 to 4 inches, 
  except up to 8 inches over nearby mountains. Winds gusting as 
  high as 35 mph will cause areas of blowing and drifting and 
  reduced visibility.

* WHERE...Western Magic Valley zone.

* WHEN...Until 11 PM MST Monday.

* IMPACTS...Travel could be very difficult. Areas of blowing 
  snow will significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

IDZ011-013-271400-
/O.CON.KBOI.WW.Y.0019.000000T0000Z-211227T1800Z/
West Central Mountains-Boise Mountains-
843 PM MST Sun Dec 26 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
MONDAY...

* WHAT...Snow. Additional snow accumulations of 4 to 10 inches, 
  except up to 18 inches over the highest mountains. The 
  previous Winter Storm Warning has been downgraded to Winter 
  Weather Advisory.

* WHERE...West Central Mountains and Boise Mountains zones.

* WHEN...Until 11 AM MST Monday.

* IMPACTS...Travel could be very difficult. Areas of blowing 
  snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

ORZ061-271200-
/O.CON.KBOI.WW.Y.0020.000000T0000Z-211227T1200Z/
Harney County-
743 PM PST Sun Dec 26 2021

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

* WHAT...Snow expected. Total snow accumulations up to 3 inches, 
  except up to 7 inches over the mountains. Wind gusts to 40 mph 
  will cause areas of blowing and drifting especially near the 
  Nevada border.

* WHERE...Harney County zone south of Burns.

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

* IMPACTS...Travel could be very difficult to impossible.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

656 
WWUS45 KBOI 271022
WSWBOI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Boise ID
322 AM MST Mon Dec 27 2021

IDZ011-271130-
/O.CAN.KBOI.WW.Y.0019.000000T0000Z-211227T1800Z/
West Central Mountains-
322 AM MST Mon Dec 27 2021

...WINTER WEATHER ADVISORY IS CANCELLED...

Isolated snow showers will continue through today.

$$

ORZ061-271130-
/O.CAN.KBOI.WW.Y.0020.000000T0000Z-211227T1200Z/
Harney County-
222 AM PST Mon Dec 27 2021

...WINTER WEATHER ADVISORY IS CANCELLED...

Isolated snow showers will continue through today.

$$

IDZ030-271830-
/O.EXT.KBOI.WS.W.0009.211227T1022Z-211228T0300Z/
Southern Twin Falls County-
322 AM MST Mon Dec 27 2021

...WINTER STORM WARNING NOW IN EFFECT UNTIL 8 PM MST THIS
EVENING...

* WHAT...Heavy snow. Additional snow accumulations of 2 to 4
  inches, except 3 to 6 inches over the mountains. Winds gusting
  as high as 40 mph will cause blowing and drifting snow.

* WHERE...Southern Twin Falls County zone.

* WHEN...Until 8 PM MST this evening.

* IMPACTS...Travel could be very difficult. Areas of blowing 
  snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

IDZ015-271830-
/O.EXT.KBOI.WS.W.0010.000000T0000Z-211228T0300Z/
Southwest Highlands-
322 AM MST Mon Dec 27 2021

...WINTER STORM WARNING NOW IN EFFECT UNTIL 8 PM MST THIS
EVENING...

* WHAT...Heavy snow. Additional snow accumulations of 4 to 10
  inches. Winds gusting as high as 40 mph causing blowing and 
  drifting snow.

* WHERE...Southwest Highlands zone.

* WHEN...Until 8 PM MST this evening.

* IMPACTS...Travel could be very difficult. Areas of blowing 
  snow could significantly reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

IDZ029-271800-
/O.EXT.KBOI.WS.W.0009.000000T0000Z-211227T1800Z/
Owyhee Mountains-
322 AM MST Mon Dec 27 2021

...WINTER STORM WARNING IN EFFECT UNTIL 11 AM MST THIS MORNING...

* WHAT...Heavy snow. Additional snow accumulations of 3 to 6
  inches. Wind gusts as high as 35 mph will cause blowing and
  drifting snow.

* WHERE...Owyhee Mountains zone.

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

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

IDZ028-271830-
/O.CON.KBOI.WC.W.0001.211228T0600Z-211228T1800Z/
/O.CON.KBOI.WW.Y.0019.000000T0000Z-211227T1800Z/
Camas Prairie-
322 AM MST Mon Dec 27 2021

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

* WHAT...For the Wind Chill Warning, dangerously cold wind chills
  expected. Wind chills as low as 25 below zero. For the Winter
  Weather Advisory, snow. Additional snow accumulations of 1 to 4
  inches. Wind gusts up to 25 mph will cause areas of blowing and
  drifting snow.

* WHERE...Camas Prairie zone.

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

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Slow down and use caution while traveling. 

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

ORZ063-271800-
/O.CON.KBOI.WS.W.0009.000000T0000Z-211227T1800Z/
Malheur County-
322 AM MST Mon Dec 27 2021 /222 AM PST Mon Dec 27 2021/

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST /10 AM
PST/ THIS MORNING...

* WHAT...Heavy snow. Additional snow accumulations of 2 to 4
  inches. Wind gusts as high as 35 mph will cause areas of 
  blowing and drifting snow especially near the Nevada border.

* WHERE...Malheur County zone.

* WHEN...Until 11 AM MST /10 AM PST/ this morning.

* IMPACTS...Plan on slippery road conditions. Areas of blowing
  snow will cause reductions in visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

IDZ016-271830-
/O.EXT.KBOI.WW.Y.0019.000000T0000Z-211228T0300Z/
Western Magic Valley-
322 AM MST Mon Dec 27 2021

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 8 PM MST THIS
EVENING...

* WHAT...Snow. Additional snow accumulations of 2 to 4 inches.
  Wind gusting as high as 35 mph will cause areas of blowing and 
  drifting snow.

* WHERE...Western Magic Valley zone.

* WHEN...Until 8 PM MST this evening.

* IMPACTS...Plan on slippery road conditions. Areas of blowing 
  snow could significantly reduce visibility. The hazardous 
  conditions could impact the morning or evening commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

IDZ013-014-271800-
/O.CON.KBOI.WW.Y.0019.000000T0000Z-211227T1800Z/
Boise Mountains-Upper Treasure Valley-
322 AM MST Mon Dec 27 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* WHAT...Snow. Additional snow accumulations of up to two inches
  in the valley, mainly south and east of Mountain Home.
  Additional snow accumulations of 1 to 3 inches over the 
  mountains.

* WHERE...Upper Treasure Valley and Boise Mountains zones.

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

* IMPACTS...Plan on slippery road conditions, which could impact
  morning commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

669 
WWUS45 KBOI 271743
WSWBOI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Boise ID
1043 AM MST Mon Dec 27 2021

IDZ029-271845-
/O.EXP.KBOI.WS.W.0009.000000T0000Z-211227T1800Z/
Owyhee Mountains-
1043 AM MST Mon Dec 27 2021

...WINTER STORM WARNING WILL EXPIRE AT 11 AM MST THIS MORNING...

Scattered snow showers will continue through this afternoon with
little additional accumulation.

$$

ORZ063-271845-
/O.EXP.KBOI.WS.W.0009.000000T0000Z-211227T1800Z/
Malheur County-
1043 AM MST Mon Dec 27 2021 /943 AM PST Mon Dec 27 2021/

...WINTER STORM WARNING WILL EXPIRE AT 11 AM MST /10 AM PST/ THIS
MORNING...

Scattered snow showers will continue through this afternoon with
little additional accumulation.

$$

IDZ028-280600-
/O.EXP.KBOI.WW.Y.0019.000000T0000Z-211227T1800Z/
/O.CON.KBOI.WC.W.0001.211228T0600Z-211228T1800Z/
Camas Prairie-
1043 AM MST Mon Dec 27 2021

...WIND CHILL WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 11 AM MST TUESDAY...
...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS
MORNING...

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

* WHERE...Camas Prairie zone.

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

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

IDZ013-014-271845-
/O.EXP.KBOI.WW.Y.0019.000000T0000Z-211227T1800Z/
Boise Mountains-Upper Treasure Valley-
1043 AM MST Mon Dec 27 2021

...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS
MORNING...

Scattered snow showers will continue through this afternoon with 
little additional accumulation.

$$

IDZ030-280300-
/O.CON.KBOI.WS.W.0009.000000T0000Z-211228T0300Z/
Southern Twin Falls County-
1043 AM MST Mon Dec 27 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS
EVENING...

* WHAT...Snow. Additional snow accumulations of up to one inch, 
  except 1 to 3 inches over the mountains. Winds gusting up to 30 
  mph will cause blowing and drifting snow.

* WHERE...Southern Twin Falls County zone.

* WHEN...Until 8 PM MST this evening.

* IMPACTS...Plan on slippery road conditions. Areas of blowing
  snow will cause reductions in visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

IDZ015-280300-
/O.CON.KBOI.WS.W.0010.000000T0000Z-211228T0300Z/
Southwest Highlands-
1043 AM MST Mon Dec 27 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS
EVENING...

* WHAT...Snow. Additional snow accumulations of up to two inches.
  Winds gusting up to 30 mph will cause blowing and drifting 
  snow.

* WHERE...Southwest Highlands zone.

* WHEN...Until 8 PM MST this evening.

* IMPACTS...Plan on slippery road conditions. Areas of blowing
  snow will cause reductions in visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

IDZ016-280300-
/O.CON.KBOI.WW.Y.0019.000000T0000Z-211228T0300Z/
Western Magic Valley-
1043 AM MST Mon Dec 27 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 8 PM MST THIS
EVENING...

* WHAT...Snow. Additional snow accumulations of up to one inch.
  Winds gusting up to 25 mph will cause areas of blowing and 
  drifting snow.

* WHERE...Western Magic Valley zone.

* WHEN...Until 8 PM MST this evening.

* IMPACTS...Plan on slippery road conditions. Areas of blowing
  snow will cause reductions in visibility. The hazardous 
  conditions could impact the evening commute. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

The latest road conditions can be obtained by calling 5 1 1.

&&

$$

373 
WWUS45 KBOI 280258
WSWBOI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Boise ID
758 PM MST Mon Dec 27 2021

IDZ015-280400-
/O.EXP.KBOI.WS.W.0010.000000T0000Z-211228T0300Z/
Southwest Highlands-
758 PM MST Mon Dec 27 2021

...WINTER STORM WARNING WILL EXPIRE AT 8 PM MST THIS EVENING...

Scattered snow showers will continue through this evening with 
little additional accumulation.

$$

IDZ030-280400-
/O.EXP.KBOI.WS.W.0009.000000T0000Z-211228T0300Z/
Southern Twin Falls County-
758 PM MST Mon Dec 27 2021

...WINTER STORM WARNING WILL EXPIRE AT 8 PM MST THIS EVENING...

Scattered snow showers will continue through this evening with 
little additional accumulation.

$$

IDZ016-280400-
/O.EXP.KBOI.WW.Y.0019.000000T0000Z-211228T0300Z/
Western Magic Valley-
758 PM MST Mon Dec 27 2021

...WINTER WEATHER ADVISORY WILL EXPIRE AT 8 PM MST THIS EVENING...

Scattered snow showers will continue through this evening with 
little additional accumulation.

$$

IDZ028-281200-
/O.CON.KBOI.WC.W.0001.211228T0600Z-211228T1800Z/
Camas Prairie-
758 PM MST Mon Dec 27 2021

...WIND CHILL WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING
TO 11 AM MST TUESDAY...

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

* WHERE...Camas Prairie zone.

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

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

Area Forecast Discussion
National Weather Service Boise ID
902 AM MST Sun Dec 26 2021

.DISCUSSION...Snow will continue through the day in the Boise
Mountains and West-central Idaho Mountains, but elsewhere only
scattered light snow showers are expected today. The next moist
surge, already in western Oregon, will reach southeast Oregon
late today and southwest Idaho this evening, with snow increasing
in our southern zones, i.e., south of Burns-Boise-Stanley. By
midnight heavier snow will focus along a developing cold front
extending from the ID/OR border through Owyhee County and the
Magic Valley. The cold front will then shift slowly south with
snow continuing in southern-most zones through noon Monday, then
shifting further south into Nevada. Meanwhile, snow will continue
in the Boise Mountains and West-Central Idaho Mountains, finally
decreasing Monday afternoon. Winter Storm Warnings and Winter
Weather Advisories were adjusted to fit these trends by the night
shift. They generally end at 5 PM MST Monday. We may be able to
end them six hours earlier. After the snow ends very cold air
will come in Monday night. Current forecast has all this. No
updates.

&&

.AVIATION...VFR, except periods of MVFR/IFR conditions as snow
showers move across the region today. Mountains obscured. Surface
winds: W-SW 10-20kt with gusts to 25 kt this morning. Winds
becoming SE-SW aft 26/18z at 15-25kt with gusts to 30kt over the
higher terrain and outside of the Snake River Plain. Winds aloft
at 10kft MSL: W to SW 30-50kt.

&&

.PREV DISCUSSION...
SHORT TERM...Today through Monday night...A deep upper trough
will continue to bring snow to our forecast area through Monday.
Snow showers will continue across the area today, with the best
chance of snow across the central Idaho mountains due to moist
southwest flow aloft. Winds today will be gusty, especially in the
higher terrain and areas south of the Snake River where gusts of
30-40 mph will occur. Areas of blowing snow will develop with
especially difficult travel conditions and low visibility.
Temperatures today will be about 5 degrees colder than yesterday
due to colder air arriving with the trough. A frontal boundary
will develop this afternoon across southern portions of the
forecast area, resulting in the formation of a band of snow in
these areas through Monday morning. Moderate to heavy snowfall
will occur within this band, and Winter Weather Advisories and
Winter Storm Warnings have been extended for southern portions of
our area through Monday afternoon. Gusty southwest winds will also
continue south of this frontal band before it shifts south into
northern Nevada by Monday afternoon. The upper trough axis will
finally swing across our area on Monday, ushering in a colder and
drier airmass. A chance of snow showers will continue into Monday
afternoon as the trough axis moves overhead before clearing
Monday night. Highs Monday will drop another 5 degrees from today,
with temperatures late Monday night dropping into the single
digits across many lower elevation locations, and below zero in
the mountains.

LONG TERM...Tuesday through Sunday...Cold and dry northerly flow
will remain over the region through mid-week with a broad area of
low pressure anchored to our northeast. Temperatures will
continue to be the coldest of the season thus far with highs in
the 20s and lows in the upper single digits...in the warmest
locations. There is agreement among the forecast models that a
disturbance will slide into the area from the north Thursday into
Thursday night in the form of an arctic front. Moisture will be
limited with the system, but with cold air in place, the front
could be a high efficiency snow maker for the region. Any snow
that falls would be high on the powder scale. Another trough is
expected to build off the coast late in the week on into the
weekend with ridging over the northern Rockies making for dry and
continued cold conditions. Anyone with travel plans mid-week
should keep a close watch on the Thursday system as details
become clearer over the coming days.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...Winter Weather Advisory until 5 PM MST Monday IDZ016-028-030-033.
     Winter Storm Warning until 5 PM MST Monday IDZ011-013-015-029.
OR...Winter Weather Advisory until 5 PM MST /4 PM PST/ Monday
     ORZ061-063.

&&

www.weather.gov/Boise
www.facebook.com/NWSBoise
www.twitter.com/NWSBoise

DISCUSSION...LC
AVIATION.....CR
PREV SHORT TERM...ST
PREV LONG TERM....MC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOISE ID
951 AM MST SUN DEC 26 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0948 AM     HEAVY SNOW       1 S FEATHERVILLE        43.59N 115.26W
12/26/2021  M14.5 INCH       ELMORE             ID   TRAINED SPOTTER

            FROM 1030 AM MST DEC 25 TO 900 AM MST DEC 26

&&

LES.COLIN