Winter Storm Warning 12, NWS Boise, ID

507 
WWUS45 KBOI 301024
WSWBOI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Boise ID
324 AM MST Thu Dec 30 2021

IDZ028-302200-
/O.NEW.KBOI.WC.W.0002.220101T0400Z-220101T1800Z/
Camas Prairie-
324 AM MST Thu Dec 30 2021

...WIND CHILL WARNING IN EFFECT FROM 9 PM FRIDAY TO 11 AM MST
SATURDAY...

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

* WHERE...Camas Prairie zone.

* WHEN...From 9 PM Friday to 11 AM MST New Years Day.

* 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. 

&&

$$

IDZ033-ORZ062-302200-
/O.CON.KBOI.WS.W.0012.211230T1200Z-211231T1200Z/
Upper Weiser River-Baker County-
324 AM MST Thu Dec 30 2021 /224 AM PST Thu Dec 30 2021/

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST /4 AM
PST/ FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 8 
  inches, except up to 10 inches over the mountains.

* WHERE...Upper Weiser River zone.

* WHEN...Until 5 AM MST Friday. Snow will be heaviest this 
  morning.

* IMPACTS...Travel will become 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 can be obtained by calling 5 1 1.

&&

$$

IDZ011-013-302200-
/O.CON.KBOI.WS.W.0012.211230T1200Z-211231T1800Z/
West Central Mountains-Boise Mountains-
324 AM MST Thu Dec 30 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 
  14 inches, except up to 18 inches over the mountains.

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

* WHEN...Until 11 AM MST Friday.

* IMPACTS...Travel will become 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 can be obtained by calling 5 1 1.

&&

$$

IDZ012-302200-
/O.CON.KBOI.WS.W.0012.211230T1200Z-211231T0000Z/
Lower Treasure Valley ID-
324 AM MST Thu Dec 30 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 6 
  inches north of the Snake Basin but 3 to 4 inches in and near 
  Caldwell and Nampa.

* WHERE...Lower Treasure Valley ID zone.

* WHEN...Until 5 PM MST this afternoon. Snow will be heaviest 
  between 9 AM and noon MST, then decrease in the afternoon 
  hours.

* IMPACTS...Travel will become very difficult. The hazardous 
  conditions could impact the morning and evening commute.

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.

&&

$$

IDZ014-302200-
/O.CON.KBOI.WW.Y.0022.211230T1200Z-211231T0600Z/
Upper Treasure Valley-
324 AM MST Thu Dec 30 2021

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

* WHAT...Snow expected. Total snow accumulations 2 to 4 inches, 
  heaviest north and west of Boise and along the foothills.

* WHERE...Upper Treasure Valley zone.

* WHEN...Until 11 PM MST this evening. In the Boise metro 
  accumulating snow will begin around 9 AM and will be heaviest 
  between 10 AM and 1 PM MST, then decrease in the afternoon 
  hours.

* IMPACTS...Travel will become very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

&&

$$

IDZ029-302200-
/O.CON.KBOI.WW.Y.0022.211230T1200Z-220101T0600Z/
Owyhee Mountains-
324 AM MST Thu Dec 30 2021

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

* WHAT...Snow expected. Total snow accumulations of 3 to 6 
  inches, except up to 12 inches over the mountains. Winds 
  gusting as high as 40 mph will cause areas of blowing and 
  drifting snow.

* WHERE...Owyhee Mountains zone.

* WHEN...Until 11 PM MST Friday.

* IMPACTS...Travel could become very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

&&

$$

ORZ064-301800-
/O.CON.KBOI.WW.Y.0022.211230T1200Z-211230T1800Z/
Oregon Lower Treasure Valley-
324 AM MST Thu Dec 30 2021 /224 AM PST Thu Dec 30 2021/

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
/10 AM PST/ THIS MORNING...

* WHAT...Snow expected. Total snow accumulations of 2 to 3 
  inches, with up to 4 inches along the foothills.

* WHERE...Oregon Lower Treasure Valley zone.

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

* IMPACTS...Travel could become very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

&&

$$

IDZ015-030-302200-
/O.CON.KBOI.WW.Y.0022.211230T1800Z-220101T0600Z/
Southwest Highlands-Southern Twin Falls County-
324 AM MST Thu Dec 30 2021

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

* WHAT...Snow expected. Total snow accumulations of 3 to 6 
  inches. Winds gusting as high as 35 mph will cause areas of 
  blowing and drifting snow.

* WHERE...Southwest Highlands and Southern Twin Falls County 
  zones.

* WHEN...From 11 AM this morning to 11 PM MST Friday.

* IMPACTS...Travel could become very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

&&

$$

IDZ016-302200-
/O.CON.KBOI.WW.Y.0022.211230T1800Z-211231T1800Z/
Western Magic Valley-
324 AM MST Thu Dec 30 2021

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 11 AM THIS
MORNING TO 11 AM MST FRIDAY...

* WHAT...Snow expected. Total snow accumulations of 2 to 4 
  inches.

* WHERE...Western Magic Valley zone.

* WHEN...From 11 AM this morning to 11 AM MST Friday.

* IMPACTS...Travel could become very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

&&

$$

119 
WWUS45 KBOI 301744
WSWBOI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Boise ID
1044 AM MST Thu Dec 30 2021

ORZ064-301845-
/O.EXP.KBOI.WW.Y.0022.000000T0000Z-211230T1800Z/
Oregon Lower Treasure Valley-
1044 AM MST Thu Dec 30 2021 /944 AM PST Thu Dec 30 2021/

...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST /10 AM PST/
THIS MORNING...

Any additional snowfall through this afternoon will be light.

$$

IDZ033-ORZ062-302200-
/O.CON.KBOI.WS.W.0012.000000T0000Z-211231T1200Z/
Upper Weiser River-Baker County-
1044 AM MST Thu Dec 30 2021 /944 AM PST Thu Dec 30 2021/

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST /4 AM
PST/ FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 5 to 8 
  inches, except up to 10 inches over the mountains.

* WHERE...Upper Weiser River zone.

* WHEN...Until 5 AM MST Friday. Snow will be heaviest this 
  morning.

* IMPACTS...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 can be obtained by calling 5 1 1.

&&

$$

IDZ011-013-302200-
/O.CON.KBOI.WS.W.0012.000000T0000Z-211231T1800Z/
West Central Mountains-Boise Mountains-
1044 AM MST Thu Dec 30 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 
  14 inches, except up to 18 inches over the mountains.

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

* WHEN...Until 11 AM MST Friday.

* IMPACTS...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 can be obtained by calling 5 1 1.

&&

$$

IDZ012-302200-
/O.CON.KBOI.WS.W.0012.000000T0000Z-211231T0000Z/
Lower Treasure Valley ID-
1044 AM MST Thu Dec 30 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 6 
  inches north of the Snake Basin but 3 to 4 inches in and near 
  Caldwell and Nampa.

* WHERE...Lower Treasure Valley ID zone.

* WHEN...Until 5 PM MST this afternoon. Snow will be heaviest 
  between 9 AM and noon MST, then decrease in the afternoon 
  hours.

* IMPACTS...Travel will 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 can be obtained by calling 5 1 1.

&&

$$

IDZ028-302200-
/O.CON.KBOI.WC.W.0002.220101T0400Z-220101T1800Z/
Camas Prairie-
1044 AM MST Thu Dec 30 2021

...WIND CHILL WARNING REMAINS IN EFFECT FROM 9 PM FRIDAY TO 11 AM
MST SATURDAY...

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

* WHERE...Camas Prairie zone.

* WHEN...From 9 PM Friday to 11 AM MST New Years Day.

* 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.

&&

$$

IDZ015-030-302200-
/O.CON.KBOI.WW.Y.0022.211230T1800Z-220101T0600Z/
Southwest Highlands-Southern Twin Falls County-
1044 AM MST Thu Dec 30 2021

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

* WHAT...Snow expected. Total snow accumulations of 3 to 6 inches.
  Winds gusting up to 35 mph will cause areas of blowing and 
  drifting snow.

* WHERE...Southwest Highlands and Southern Twin Falls County 
  zones.

* WHEN...From 11 AM this morning to 11 PM MST Friday.

* 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.

&&

$$

IDZ014-302200-
/O.CON.KBOI.WW.Y.0022.000000T0000Z-211231T0600Z/
Upper Treasure Valley-
1044 AM MST Thu Dec 30 2021

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

* WHAT...Snow expected. Total snow accumulations 2 to 4 inches, 
  heaviest north and west of Boise and along the foothills.

* WHERE...Upper Treasure Valley zone.

* WHEN...Until 11 PM MST this evening. In the Boise metro
  accumulating snow will be heaviest through early afternoon, then
  decrease during the afternoon.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

&&

$$

IDZ016-302200-
/O.CON.KBOI.WW.Y.0022.211230T1800Z-211231T1800Z/
Western Magic Valley-
1044 AM MST Thu Dec 30 2021

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

* WHAT...Snow expected. Total snow accumulations of 2 to 4 
  inches.

* WHERE...Western Magic Valley zone.

* WHEN...From 11 AM this morning to 11 AM MST Friday.

* IMPACTS...Travel could become very difficult.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

&&

$$

IDZ029-302200-
/O.CON.KBOI.WW.Y.0022.000000T0000Z-220101T0600Z/
Owyhee Mountains-
1044 AM MST Thu Dec 30 2021

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

* WHAT...Snow expected. Total snow accumulations of 3 to 6 inches,
  except up to 12 inches over the mountains. Winds gusting up to 
  35 mph will cause areas of blowing and drifting snow.

* WHERE...Owyhee Mountains zone.

* WHEN...Until 11 PM MST Friday.

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

&&

$$

245 
WWUS45 KBOI 302020
WSWBOI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Boise ID
120 PM MST Thu Dec 30 2021

IDZ033-ORZ062-310100-
/O.CON.KBOI.WS.W.0012.000000T0000Z-211231T1200Z/
Upper Weiser River-Baker County-
120 PM MST Thu Dec 30 2021 /1220 PM PST Thu Dec 30 2021/

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST /4 AM
PST/ FRIDAY...

* WHAT...Heavy snow. Additional snow accumulations of 1 to 3
  inches, except 3 to 7 inches over the mountains.

* WHERE...In Oregon, Baker County zone. In Idaho, Upper Weiser 
  River zone.

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

* IMPACTS...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 can be obtained by calling 5 1 1.

&&

$$

IDZ011-013-310100-
/O.CON.KBOI.WS.W.0012.000000T0000Z-211231T1800Z/
West Central Mountains-Boise Mountains-
120 PM MST Thu Dec 30 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
FRIDAY...

* WHAT...Heavy snow. Additional snow accumulations of 4 to 6
  inches, except 4 to 11 inches over the mountains.

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

* WHEN...Until 11 AM MST Friday.

* IMPACTS...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 can be obtained by calling 5 1 1.

&&

$$

IDZ012-310000-
/O.CON.KBOI.WS.W.0012.000000T0000Z-211231T0000Z/
Lower Treasure Valley ID-
120 PM MST Thu Dec 30 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS
AFTERNOON...

* WHAT...Snow. Additional snow accumulations of up to one inch, 
  except up to two inches over the mountains.

* WHERE...Lower Treasure Valley ID zone.

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

* IMPACTS...Travel will 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 can be obtained by calling 5 1 1.

&&

$$

IDZ028-310100-
/O.CON.KBOI.WC.W.0002.220101T0400Z-220101T1800Z/
Camas Prairie-
120 PM MST Thu Dec 30 2021

...WIND CHILL WARNING REMAINS IN EFFECT FROM 9 PM FRIDAY TO 11 AM
MST SATURDAY...

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

* WHERE...Camas Prairie zone.

* WHEN...From 9 PM Friday to 11 AM MST Saturday.

* 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.

&&

$$

IDZ015-029-030-310100-
/O.CON.KBOI.WW.Y.0022.000000T0000Z-220101T0600Z/
Southwest Highlands-Owyhee Mountains-Southern Twin Falls County-
120 PM MST Thu Dec 30 2021

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

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

* WHERE...Southern Twin Falls County, Southwest Highlands and 
  Owyhee Mountains zones.

* WHEN...Until 11 PM MST Friday.

* 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.

&&

$$

IDZ014-310100-
/O.CON.KBOI.WW.Y.0022.000000T0000Z-211231T0600Z/
Upper Treasure Valley-
120 PM MST Thu Dec 30 2021

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

* WHAT...Snow. Additional snow accumulations of up to two 
  inches, except up to 3 inches over the mountains.

* WHERE...Upper Treasure Valley zone.

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

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

&&

$$

IDZ016-310100-
/O.CON.KBOI.WW.Y.0022.000000T0000Z-211231T1800Z/
Western Magic Valley-
120 PM MST Thu Dec 30 2021

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

* WHAT...Snow. Additional snow accumulations of 1 to 3 inches.

* WHERE...Western Magic Valley zone.

* WHEN...Until 11 AM MST Friday.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

&&

$$

735 
WWUS45 KBOI 302339
WSWBOI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Boise ID
439 PM MST Thu Dec 30 2021

IDZ012-310045-
/O.EXP.KBOI.WS.W.0012.000000T0000Z-211231T0000Z/
Lower Treasure Valley ID-
439 PM MST Thu Dec 30 2021

...WINTER STORM WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON...

Snow showers possible tonight but snow accumulations will be
light. 

$$

IDZ033-ORZ062-311100-
/O.CON.KBOI.WS.W.0012.000000T0000Z-211231T1200Z/
Upper Weiser River-Baker County-
439 PM MST Thu Dec 30 2021 /339 PM PST Thu Dec 30 2021/

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST /4 AM
PST/ FRIDAY...

* WHAT...Heavy snow. Additional snow accumulations of 1 to 3 
  inches, except 3 to 7 inches over the mountains.

* WHERE...In Oregon, Baker County zone. In Idaho, Upper Weiser 
  River zone.

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

* IMPACTS...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 can be obtained by calling 5 1 1.

&&

$$

IDZ011-013-311100-
/O.CON.KBOI.WS.W.0012.000000T0000Z-211231T1800Z/
West Central Mountains-Boise Mountains-
439 PM MST Thu Dec 30 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
FRIDAY...

* WHAT...Heavy snow. Additional snow accumulations of 4 to 6 
  inches, except 4 to 11 inches over the mountains.

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

* WHEN...Until 11 AM MST Friday.

* IMPACTS...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 can be obtained by calling 5 1 1.

&&

$$

IDZ028-311100-
/O.CON.KBOI.WC.W.0002.220101T0400Z-220101T1800Z/
Camas Prairie-
439 PM MST Thu Dec 30 2021

...WIND CHILL WARNING REMAINS IN EFFECT FROM 9 PM FRIDAY TO 11 AM
MST SATURDAY...

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

* WHERE...Camas Prairie zone.

* WHEN...From 9 PM Friday to 11 AM MST Saturday.

* 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. 

&&

$$

IDZ015-029-030-311100-
/O.CON.KBOI.WW.Y.0022.000000T0000Z-220101T0600Z/
Southwest Highlands-Owyhee Mountains-Southern Twin Falls County-
439 PM MST Thu Dec 30 2021

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

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

* WHERE...Southern Twin Falls County, Southwest Highlands and 
  Owyhee Mountains zones.

* WHEN...Until 11 PM MST Friday.

* 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.

&&

$$

IDZ014-310600-
/O.CON.KBOI.WW.Y.0022.000000T0000Z-211231T0600Z/
Upper Treasure Valley-
439 PM MST Thu Dec 30 2021

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

* WHAT...Snow. Additional snow accumulations of up to two 
  inches, except up to 3 inches over the mountains.

* WHERE...Upper Treasure Valley zone.

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

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

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

&&

$$

IDZ016-311100-
/O.CON.KBOI.WW.Y.0022.000000T0000Z-211231T1800Z/
Western Magic Valley-
439 PM MST Thu Dec 30 2021

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

* WHAT...Snow. Additional snow accumulations of 1 to 3 inches.

* WHERE...Western Magic Valley zone.

* WHEN...Until 11 AM MST Friday.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

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

&&

$$

008 
WWUS45 KBOI 310556
WSWBOI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Boise ID
1056 PM MST Thu Dec 30 2021

IDZ014-310700-
/O.EXP.KBOI.WW.Y.0022.000000T0000Z-211231T0600Z/
Upper Treasure Valley-
1056 PM MST Thu Dec 30 2021

...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 PM MST THIS
EVENING...

Snow showers will continue overnight with light snow 
accumulations possible.

$$

IDZ033-ORZ062-311200-
/O.CON.KBOI.WS.W.0012.000000T0000Z-211231T1200Z/
Upper Weiser River-Baker County-
1056 PM MST Thu Dec 30 2021 /956 PM PST Thu Dec 30 2021/

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST /4 AM
PST/ FRIDAY...

* WHAT...Heavy snow. Additional snow accumulations of 1 to 3 
  inches, except 3 to 7 inches over the mountains.

* WHERE...In Oregon, Baker County zone. In Idaho, Upper Weiser 
  River zone.

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

* IMPACTS...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 can be obtained by calling 5 1 1.

&&

$$

IDZ011-013-311400-
/O.CON.KBOI.WS.W.0012.000000T0000Z-211231T1800Z/
West Central Mountains-Boise Mountains-
1056 PM MST Thu Dec 30 2021

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST
FRIDAY...

* WHAT...Heavy snow. Additional snow accumulations of 4 to 6 
  inches, except 4 to 11 inches over the mountains.

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

* WHEN...Until 11 AM MST Friday.

* IMPACTS...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 can be obtained by calling 5 1 1.

&&

$$

IDZ028-311400-
/O.CON.KBOI.WC.W.0002.220101T0400Z-220101T1800Z/
Camas Prairie-
1056 PM MST Thu Dec 30 2021

...WIND CHILL WARNING REMAINS IN EFFECT FROM 9 PM FRIDAY TO 11 AM
MST SATURDAY...

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

* WHERE...Camas Prairie zone.

* WHEN...From 9 PM Friday to 11 AM MST Saturday.

* 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. 

&&

$$

IDZ015-029-030-311400-
/O.CON.KBOI.WW.Y.0022.000000T0000Z-220101T0600Z/
Southwest Highlands-Owyhee Mountains-Southern Twin Falls County-
1056 PM MST Thu Dec 30 2021

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

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

* WHERE...Southern Twin Falls County, Southwest Highlands and 
  Owyhee Mountains zones.

* WHEN...Until 11 PM MST Friday.

* 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.

&&

$$

IDZ016-311400-
/O.CON.KBOI.WW.Y.0022.000000T0000Z-211231T1800Z/
Western Magic Valley-
1056 PM MST Thu Dec 30 2021

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

* WHAT...Snow. Additional snow accumulations of 1 to 3 inches.

* WHERE...Western Magic Valley zone.

* WHEN...Until 11 AM MST Friday.

* IMPACTS...Plan on slippery road conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

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

&&

$$

814 
WWUS45 KBOI 310936
WSWBOI

URGENT - WINTER WEATHER MESSAGE
National Weather Service Boise ID
236 AM MST Fri Dec 31 2021

IDZ033-ORZ062-311045-
/O.CAN.KBOI.WS.W.0012.000000T0000Z-211231T1200Z/
Upper Weiser River-Baker County-
236 AM MST Fri Dec 31 2021 /136 AM PST Fri Dec 31 2021/

...WINTER STORM WARNING IS CANCELLED...

Snow has generally ended, but scattered snow showers will 
linger today with additional accumulations less than one inch.

$$

IDZ011-013-311045-
/O.CAN.KBOI.WS.W.0012.000000T0000Z-211231T1800Z/
West Central Mountains-Boise Mountains-
236 AM MST Fri Dec 31 2021

...WINTER STORM WARNING IS CANCELLED...

Snow has decreased to scattered snow light showers in the west
central Idaho Mountains. More numerous snow showers in the Boise 
Mountains will still add another 1-3 inches today but not enough 
to continue a winter storm warning.

$$

IDZ030-311045-
/O.CAN.KBOI.WW.Y.0022.000000T0000Z-220101T0600Z/
Southern Twin Falls County-
236 AM MST Fri Dec 31 2021

...WINTER WEATHER ADVISORY IS CANCELLED...

Snow showers may add another inch this morning but will not be 
enough to continue the winter weather advisory.

$$

IDZ016-311045-
/O.CAN.KBOI.WW.Y.0022.000000T0000Z-211231T1800Z/
Western Magic Valley-
236 AM MST Fri Dec 31 2021

...WINTER WEATHER ADVISORY IS CANCELLED...

Snow showers may accumulate up to another half inch this morning 
but will not be enough to continue the winter weather advisory. 

$$

IDZ028-312200-
/O.CON.KBOI.WC.W.0002.220101T0400Z-220101T1800Z/
Camas Prairie-
236 AM MST Fri Dec 31 2021

...WIND CHILL WARNING REMAINS IN EFFECT FROM 9 PM THIS EVENING TO
11 AM MST SATURDAY...

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

* WHERE...Camas Prairie zone.

* WHEN...From 9 PM Friday night to 11 AM MST New Years Day.

* IMPACTS...The dangerously cold wind chills can 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.

&&

$$

IDZ015-029-312200-
/O.EXT.KBOI.WW.Y.0022.000000T0000Z-220101T0300Z/
Southwest Highlands-Owyhee Mountains-
236 AM MST Fri Dec 31 2021

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

* WHAT...Snow and blowing snow. Additional snow accumulations 1 to
  3 inches, except up to 5 inches over the mountains. Wind gusts
  to 35 mph will cause areas of blowing and drifting snow.

* WHERE...Southwest Highlands and Owyhee Mountains zones.

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

* IMPACTS...Travel could be 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.

&&

$$

Area Forecast Discussion
National Weather Service Boise ID
859 PM MST Wed Dec 29 2021

.DISCUSSION...The current storm is mostly finished with a few
snow showers lingering over far eastern portions. Clearing skies
in its wake have lead to quickly falling temperatures and some
fog development while other areas are holding onto a low stratus.
Clouds in advance of the next storm system will increase late
tonight with snow developing Thursday morning. With the NW to SE
track the heaviest snow again will focus over the mountains of
e-central Oregon and w-central Idaho. Lower valleys will see
lesser amounts, but still enough to warrant a Winter Weather
Advisory. Have issued products for this next system with
amount/timing details. Lower elevations of Baker county and the
Western Magic Valley will generally see less than 2 inches of
accumulating snow. Updated forecast for Thursday's event and to
include headlines.

&&

.AVIATION...Widespread MVFR/IFR in low ceilings. Mountains
obscured. Snow redeveloping after 12z/Thu with IFR to local LIFR
conditions. Surface winds: SE-SW 5-10 kt switching to W-NW
Wednesday afternoon. Winds aloft at 10kft MSL: W-SW 25-35kt
becoming W-NW 35-45kt.

&&

.PREV DISCUSSION...
SHORT TERM...Tonight through Friday night...The widespread snow
event over the area this afternoon will shift south and weaken by
early this evening as a cold front ushers in drier air from the
north. There will be a period of clearing skies overnight which
will allow for colder temperatures early Thursday morning.
Another system in western Canada will move southward overnight and
reach our area on Thursday. Snow will arrive first in the north
early Thursday morning and will spread into the Treasure Valley
west of Mountain Home by mid-morning. The snow will continue to
move into the remainder of the area during the afternoon. In
addition to the snow, gusty southwest winds across portions of
southeast Oregon and southwest Idaho (south of the Snake River
Plain) will lead to areas of blowing and drifting snow through
Thursday night. Snow will continue through Thursday night, mainly
in the mountains, with the arrival of an upper trough. Total
snowfall amounts of up to 2 inches are expected in the lower
valleys (locally 3 along the foothills), 3 to 6 inches in the
mountain valleys (such as the Long Valley, Upper Weiser Basin),
and 6 inches or more in the mountains. Snow showers will linger on
Friday for additional light snowfall accumulations - mainly in
the mountains. The system will finally exit to the east Friday
night for decreasing clouds and winds, resulting in very cold
temperatures early Saturday morning.

LONG TERM...Saturday through Wednesday...Arctic air from a deep
upper level low in Canada will bring temperatures 10-20 degrees
below normal through Saturday night. Overnight lows will be in the
single digits for the valleys, and below zero in the mountains. A
very gradual warming trend will begin Saturday night, as a ridge
builds in from the southwest. We expect dry, cold, and mostly
clear conditions through Sunday night. There is fairly good model
agreement on southwest flow aloft and an accompanying atmospheric
river moving into our region later on Monday. The NBM appears to
continue to be confused on temperature and precipitation type
agreement. This is probably due to model disagreement on
precipitation type outcomes for next week. The ECMWF model favors
a rain-snow mix, shifting towards warmer temperatures for highs on
Monday, while the GFS is trending cooler showing mostly snow
during the day on Tuesday. Both models still show a sharp
temperature gradient with a cold frontal passage late Tuesday,
meaning a majority of the precipitation event will turn to snow
that night in the region. We will see widespread precipitation
continue into late Wednesday, as the trough moves to our east and
a warm front moves into the area with northwest flow aloft.

&&

.BOI WATCHES/WARNINGS/ADVISORIES...
ID...Winter Weather Advisory from 6 AM to 5 PM MST Thursday
     IDZ012-014-033.
     Winter Weather Advisory from 6 AM Thursday to 5 AM MST Friday
     IDZ011-013.
OR...Winter Weather Advisory from 6 AM MST /5 AM PST/ to 5 PM MST /4
     PM PST/ Thursday ORZ064.

&&

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

DISCUSSION...DG
AVIATION.....KA
PREV SHORT TERM...BW
PREV LONG TERM....SA