Alert archive / Idaho / Winter Storm Warnings in 2020

Winter Storm Warning 2, NWS Pocatello, ID

January 16, 2020Bear Lake County, Caribou County, Franklin County, Idaho

NWS Pocatello, ID issued this winter storm warning at Jan 16, 2020, 2:28 AM MST for Bear Lake County, Caribou County, Franklin County, Idaho. It took effect at Jan 17, 2020, 12:00 AM MST. It was in force for 18 hr. 3 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jan 16, 2020, 2:28 AM MST (09:28 UTC)
In effect from
Jan 17, 2020, 12:00 AM MST
Expired
Jan 17, 2020, 5:32 PM MST
In force
18 hr
Issued by
NWS Pocatello, ID

Counties Bear Lake County, ID, Caribou County, ID, Franklin County, ID

The radar

The Pocatello radar (KSFX), 119 km from the middle of the area, began a volume at 09:31 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

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

What was reported inside it

TimeReportWhereRemark
Jan 17, 7:00 AM MSTSNOW 1.5Soda Springs, IDCOCORAHS STATION ID-CR-1 SODA SPRINGS.
Jan 17, 8:00 AM MSTSNOW 3Bern, IDCO-OP OBSERVER STATION BERI1 BERN.
Jan 17, 8:38 AM MSTSNOW 3Paris, IDWINDS ARE PICKING UP AT THE TIME OF THE REPORT.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 00:00Z, 9.5 hours before the alert went out and 184 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Salt Lake City I, UT at 00:00Z on 2020-01-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Salt Lake City I, UT at 00:00Z on 2020-01-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 176 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1781 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
176 m²/s²
0-3 km storm-relative helicity
186 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

429 
WWUS45 KPIH 160928
WSWPIH

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
228 AM MST Thu Jan 16 2020

IDZ060-162145-
/O.UPG.KPIH.WW.Y.0005.200117T0700Z-200118T0700Z/
/O.NEW.KPIH.WS.W.0002.200117T0700Z-200118T0600Z/
Bear River Range-
Including the city of Emigration Summit
228 AM MST Thu Jan 16 2020

...WINTER STORM WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 11 PM
MST FRIDAY...

* WHAT...Snow, heavy at times. Total snow accumulation of 9 to 13
  inches. Wind gusts up to 40 mph at times producing areas of 
  blowing and drifting snow.

* WHERE...Bear River Range, including Emigration Summit.

* WHEN...From midnight tonight to 11 PM MST Friday.

* ADDITIONAL DETAILS...Travel could become hazardous. Gusty winds
  could produce blowing and drifting snow with whiteout conditions
  especially over mountain passes.

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.

&&

$$

IDZ056-057-162145-
/O.EXB.KPIH.WW.Y.0005.200117T0700Z-200118T0600Z/
Southern Hills/Albion Mountains-Raft River Region-
Including the cities of Albion, Almo, Malta, Rockland, 
and Holbrook
228 AM MST Thu Jan 16 2020

...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO
11 PM MST FRIDAY...

* WHAT...Light to moderate snow expected. Total snow accumulation
  of 1 to 3 inches. Wind gusts of 40 to 50 mph at times producing
  areas of blowing and drifting snow.

* WHERE...South-central highlands, including Interstate 84,
  Sweetzer Summit, and Connor Summit.

* WHEN...From midnight tonight to 11 PM MST Friday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. Gusty
  winds could produce blowing and drifting snow with reduced
  visibility especially over mountain passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

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

&&

$$

IDZ071>074-162145-
/O.EXB.KPIH.WW.Y.0005.200117T0400Z-200118T0400Z/
Frank Church Wilderness-Sawtooth/Stanley Basin-Sun Valley Region-
Big Lost Highlands/Copper Basin-
Including the cities of Clayton, Stanley, Ketchum, Sun Valley, 
Galena, and Copper Basin
228 AM MST Thu Jan 16 2020

...WINTER WEATHER ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO
9 PM MST FRIDAY...

* WHAT...Snow, moderate to heavy at times. Total snow
  accumulations of 3 to 9 inches. Winds gusting as high as 35 
  mph may produce areas of blowing and drifting snow.

* WHERE...Sawtooth, Boulder, Pioneer, and Smoky Mountains,
  including Galena Summit, the Stanley basin, and Ketchum.

* WHEN...From 9 PM this evening to 9 PM MST Friday.

* ADDITIONAL DETAILS...Plan on difficult road conditions. Gusty
  winds may create blowing and drifting snow with near whiteout
  conditions, especially over mountain passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

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

&&

$$

IDZ051-068>070-075-162145-
/O.EXB.KPIH.WW.Y.0005.200117T0400Z-200118T0400Z/
Shoshone/Lava Beds-Lost River Valley-Lost River Range-
Challis/Pahsimeroi Valleys-Wood River Foothills-
Including the cities of Shoshone, Richfield, Carey, Howe, Arco, 
Mackay, Chilly, Borah Peak, Challis, Hailey, Bellevue, and Picabo
228 AM MST Thu Jan 16 2020

...WINTER WEATHER ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO
9 PM MST FRIDAY...

* WHAT...Light to moderate snow expected. Total snow accumulations
  of 1 to 3 inches. Wind gusts as high as 35 mph may produce areas
  of blowing and drifting snow.

* WHERE...Shoshone north to Hailey, Lost River and Pahsimeroi
  Valleys, including Willow Creek Summit.

* WHEN...From 9 PM this evening to 9 PM MST Friday.

* ADDITIONAL DETAILS...Plan on difficult road conditions. Gusty
  winds may create blowing and drifting snow with reduced
  visibility, especially over mountain passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

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

&&

$$

IDZ052>054-067-162145-
/O.EXT.KPIH.WW.Y.0005.200117T0700Z-200118T0600Z/
Arco/Mud Lake Desert-Upper Snake River Plain-
Lower Snake River Plain-Beaverhead - Lemhi Highlands-
Including the cities of Mud Lake, INL, Craters of the Moon NM, 
Idaho Falls, Rexburg, St. Anthony, Pocatello, Blackfoot, 
American Falls, Shelley, Fort Hall, Dubois, Spencer, Edie School,
and Small
228 AM MST Thu Jan 16 2020

...WINTER WEATHER ADVISORY NOW IN EFFECT FROM MIDNIGHT TONIGHT TO
11 PM MST FRIDAY...

* WHAT...Snow expected. Total snow accumulations of 1 to 3 
  inches. Winds gusting as high as 45 mph. Blowing and drifting 
  snow likely.

* WHERE...Pocatello, Idaho Falls, Blackfoot, Rexburg, INL, 
  Dubois.

* WHEN...From midnight tonight to 11 PM MST Friday.

* ADDITIONAL DETAILS...Plan on difficult road conditions. 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.

&&

$$

IDZ058-059-061>066-162145-
/O.EXT.KPIH.WW.Y.0005.200117T0700Z-200118T0600Z/
Marsh and Arbon Highlands-Franklin/Eastern Oneida Region-
Bear Lake Valley-Blackfoot Mountains-Caribou Range-
Big Hole Mountains-Teton Valley-Centennial Mountains -
Island Park-
Including the cities of Inkom, McCammon, Downey, 
Lava Hot Springs, Malad, Preston, Thatcher, St. Charles, 
Montpelier, Georgetown, Grace, Soda Springs, Henry, Bone, Wayan, 
Swan Valley, Victor, Ashton, Tetonia, Driggs, Island Park, 
and Kilgore
228 AM MST Thu Jan 16 2020

...WINTER WEATHER ADVISORY NOW IN EFFECT FROM MIDNIGHT TONIGHT TO
11 PM MST FRIDAY...

* WHAT...Snow, moderate to heavy at times. Total snow
  accumulations of 2 to 4 inches in the mountain-valleys and 5 to
  10 inches over ridge tops. Winds gusting as high as 45 mph may 
  create ares of blowing and drifting snow.

* WHERE...Island Park, Ashton, Driggs, Soda Springs, Swan 
  Valley, Preston, Malad, Montpelier, McCammon.

* WHEN...From midnight tonight to 11 PM MST Friday.

* ADDITIONAL DETAILS...Plan on hazardous road conditions. Gusty
  winds may create areas of blowing and drifting snow with near 
  whiteout conditions, especially over mountain passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

&&

$$

For more information from the National Weather Service visit
https://weather.gov/pocatello
4 follow-up statements
042 
WWUS45 KPIH 162046
WSWPIH

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
146 PM MST Thu Jan 16 2020

IDZ060-171200-
/O.CON.KPIH.WS.W.0002.200117T0700Z-200118T0600Z/
Bear River Range-
Including the city of Emigration Summit
146 PM MST Thu Jan 16 2020

...WINTER STORM WARNING REMAINS IN EFFECT FROM MIDNIGHT TONIGHT
TO 11 PM MST FRIDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 6 to 12
  inches. Winds gusting as high as 50 mph.

* WHERE...Bear River Range, including Emigration Summit.

* WHEN...From midnight tonight to 11 PM MST Friday.

* ADDITIONAL DETAILS...Travel could become hazardous. Gusty 
  winds could produce blowing and drifting snow with whiteout 
  conditions especially over mountain passes.

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.

&&

$$

IDZ055-171200-
/O.EXA.KPIH.WW.Y.0005.200117T0700Z-200118T0600Z/
Eastern Magic Valley-
Including the cities of Burley, Rupert, Heyburn, and Oakley
146 PM MST Thu Jan 16 2020

...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO
11 PM MST FRIDAY...

* WHAT...Snow expected. Total snow accumulations of up to one
  inch. Winds gusting as high as 45 mph may produce areas of
  blowing and drifting snow.

* WHERE...Burley, Rupert, Heyburn and Oakley.

* WHEN...From midnight tonight to 11 PM MST Friday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. 
  Gusty winds could produce blowing and drifting snow with 
  reduced visibility especially over mountain passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. 

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

&&

$$

IDZ068>070-171200-
/O.EXT.KPIH.WW.Y.0005.200117T0700Z-200118T0600Z/
Lost River Valley-Lost River Range-Challis/Pahsimeroi Valleys-
Including the cities of Howe, Arco, Mackay, Chilly, Borah Peak, 
and Challis
146 PM MST Thu Jan 16 2020

...WINTER WEATHER ADVISORY NOW IN EFFECT FROM MIDNIGHT TONIGHT TO
11 PM MST FRIDAY...

* WHAT...Snow expected. Total snow accumulations of up to one
  inch. Winds gusting as high as 35 mph may produce areas of
  blowing and drifting snow.

* WHERE...Howe, Arco, Mackay and Challis.

* WHEN...From midnight tonight to 11 PM MST Friday.

* ADDITIONAL DETAILS...Plan on difficult road conditions. Gusty 
  winds may create blowing and drifting snow with reduced 
  visibility, especially over mountain passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

&&

$$

IDZ071>074-171200-
/O.EXT.KPIH.WW.Y.0005.200117T0400Z-200118T0600Z/
Frank Church Wilderness-Sawtooth/Stanley Basin-Sun Valley Region-
Big Lost Highlands/Copper Basin-
Including the cities of Clayton, Stanley, Ketchum, Sun Valley, 
Galena, and Copper Basin
146 PM MST Thu Jan 16 2020

...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 9 PM THIS EVENING
TO 11 PM MST FRIDAY...

* WHAT...Snow expected. Total snow accumulations of 3 to 7 inches.
  Winds gusting as high as 35 mph may produce areas of blowing and
  drifting snow.

* WHERE...Clayton, Stanley, Ketchum, Sun Valley, Galena Summit.

* WHEN...From 9 PM this evening to 11 PM MST Friday.

* ADDITIONAL DETAILS...Plan on difficult road conditions. Gusty 
  winds may create blowing and drifting snow with near whiteout 
  conditions, especially over mountain passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

&&

$$

IDZ051-075-171200-
/O.EXT.KPIH.WW.Y.0005.200117T0700Z-200118T0600Z/
Shoshone/Lava Beds-Wood River Foothills-
Including the cities of Shoshone, Richfield, Carey, Hailey, 
Bellevue, and Picabo
146 PM MST Thu Jan 16 2020

...WINTER WEATHER ADVISORY NOW IN EFFECT FROM MIDNIGHT TONIGHT TO
11 PM MST FRIDAY...

* WHAT...Snow expected. Total snow accumulations of up to two
  inches. Winds gusting as high as 35 mph may produce areas of
  blowing and drifting snow.

* WHERE...Shoshone, Richfield, Carey, Hailey, Bellevue.

* WHEN...From midnight tonight to 11 PM MST Friday.

* ADDITIONAL DETAILS...Plan on difficult road conditions. Gusty 
  winds may create blowing and drifting snow with reduced 
  visibility, especially over mountain passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

&&

$$

IDZ052>054-067-171200-
/O.CON.KPIH.WW.Y.0005.200117T0700Z-200118T0600Z/
Arco/Mud Lake Desert-Upper Snake River Plain-
Lower Snake River Plain-Beaverhead - Lemhi Highlands-
Including the cities of Mud Lake, INL, Craters of the Moon NM, 
Idaho Falls, Rexburg, St. Anthony, Pocatello, Blackfoot, 
American Falls, Shelley, Fort Hall, Dubois, Spencer, Edie School,
and Small
146 PM MST Thu Jan 16 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT
TONIGHT TO 11 PM MST FRIDAY...

* WHAT...Snow expected. Total snow accumulations of up to 3
  inches. Winds gusting as high as 45 mph may produce areas of
  blowing and drifting snow.

* WHERE...Pocatello, American Falls, Shelley, Blackfoot, Idaho
  Falls, Rexburg, INL, Dubois, Fort Hall, St. Anthony.

* WHEN...From midnight tonight to 11 PM MST Friday.

* ADDITIONAL DETAILS...Plan on difficult road conditions. 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.

&&

$$

IDZ058-059-061>066-171200-
/O.CON.KPIH.WW.Y.0005.200117T0700Z-200118T0600Z/
Marsh and Arbon Highlands-Franklin/Eastern Oneida Region-
Bear Lake Valley-Blackfoot Mountains-Caribou Range-
Big Hole Mountains-Teton Valley-Centennial Mountains -
Island Park-
Including the cities of Inkom, McCammon, Downey, 
Lava Hot Springs, Malad, Preston, Thatcher, St. Charles, 
Montpelier, Georgetown, Grace, Soda Springs, Henry, Bone, Wayan, 
Swan Valley, Victor, Ashton, Tetonia, Driggs, Island Park, 
and Kilgore
146 PM MST Thu Jan 16 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT
TONIGHT TO 11 PM MST FRIDAY...

* WHAT...Snow expected. Total snow accumulations of 2 to 4 inches,
  up to 8 inches on ridge tops and elevations above passes. Winds
  gusting as high as 45 mph may produce areas of blowing and
  drifting snow.

* WHERE...McCammon, Lava Hot Springs, Malad, Preston, Montpelier,
  Soda Springs, Swan Valley, Driggs, Ashton, Island Park.

* WHEN...From midnight tonight to 11 PM MST Friday.

* ADDITIONAL DETAILS...Plan on hazardous road conditions. Gusty 
  winds may create areas of blowing and drifting snow with near 
  whiteout conditions, especially over mountain passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

&&

$$

IDZ056-057-171200-
/O.CON.KPIH.WW.Y.0005.200117T0700Z-200118T0600Z/
Southern Hills/Albion Mountains-Raft River Region-
Including the cities of Albion, Almo, Malta, Rockland, 
and Holbrook
146 PM MST Thu Jan 16 2020

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT
TONIGHT TO 11 PM MST FRIDAY...

* WHAT...Snow expected. Total snow accumulations of up to two
  inches. Winds gusting as high as 50 mph may produce areas of
  blowing and drifting snow.

* WHERE...Albion, Malta, Rockland, Holbrook.

* WHEN...From midnight tonight to 11 PM MST Friday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions. 
  Gusty winds could produce blowing and drifting snow with 
  reduced visibility especially over mountain passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

&&

$$

For more information from the National Weather Service visit
https://weather.gov/pocatello
220 
WWUS45 KPIH 170955
WSWPIH

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
255 AM MST Fri Jan 17 2020

IDZ060-172145-
/O.CON.KPIH.WS.W.0002.000000T0000Z-200118T0600Z/
Bear River Range-
Including the city of Emigration Summit
255 AM MST Fri Jan 17 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

* WHAT...Heavy snow expected. Total snow accumulations of 7 to 14
  inches. Winds gusting as high as 45 mph producing areas of
  blowing and drifting snow.

* WHERE...Bear River Range, including Emigration Summit.

* WHEN...Continuing through 11 PM MST tonight.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Patchy 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Gusty winds could bring down tree branches.

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.

&&

$$

IDZ052>054-067>070-172145-
/O.CON.KPIH.WW.Y.0005.000000T0000Z-200118T0600Z/
Arco/Mud Lake Desert-Upper Snake River Plain-
Lower Snake River Plain-Beaverhead - Lemhi Highlands-
Lost River Valley-Lost River Range-Challis/Pahsimeroi Valleys-
Including the cities of Mud Lake, INL, Craters of the Moon NM, 
Idaho Falls, Rexburg, St. Anthony, Pocatello, Blackfoot, 
American Falls, Shelley, Fort Hall, Dubois, Spencer, Edie School,
Small, Howe, Arco, Mackay, Chilly, Borah Peak, and Challis
255 AM MST Fri Jan 17 2020

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

* WHAT...Snow expected. Total snow accumulations of up to 3 
  inches. Winds gusting as high as 45 mph may produce areas of 
  blowing and drifting snow.

* WHERE...Pocatello, American Falls, Shelley, Blackfoot, Idaho
  Falls, Rexburg, INL, Dubois, Fort Hall, St. Anthony, and Lost
  River Valley.

* WHEN...Continuing through 11 PM MST tonight.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Patchy 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Gusty winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

&&

$$

IDZ058-059-061>066-172145-
/O.CON.KPIH.WW.Y.0005.000000T0000Z-200118T0600Z/
Marsh and Arbon Highlands-Franklin/Eastern Oneida Region-
Bear Lake Valley-Blackfoot Mountains-Caribou Range-
Big Hole Mountains-Teton Valley-Centennial Mountains -
Island Park-
Including the cities of Inkom, McCammon, Downey, 
Lava Hot Springs, Malad, Preston, Thatcher, St. Charles, 
Montpelier, Georgetown, Grace, Soda Springs, Henry, Bone, Wayan, 
Swan Valley, Victor, Ashton, Tetonia, Driggs, Island Park, 
and Kilgore
255 AM MST Fri Jan 17 2020

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

* WHAT...Moderate snow expected. Total snow accumulations of 2 to
  5 inches in the valleys and 6 to 10 inches in the mountains. 
  Winds gusting as high as 45 mph may produce areas of blowing and
  drifting snow.

* WHERE...McCammon, Lava Hot Springs, Malad, Preston, 
  Montpelier, Soda Springs, Swan Valley, Driggs, Ashton, Island 
  Park.

* WHEN...Continuing through 11 PM MST tonight.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Patchy 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Gusty winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

&&

$$

IDZ071>074-172145-
/O.CON.KPIH.WW.Y.0005.000000T0000Z-200118T0600Z/
Frank Church Wilderness-Sawtooth/Stanley Basin-Sun Valley Region-
Big Lost Highlands/Copper Basin-
Including the cities of Clayton, Stanley, Ketchum, Sun Valley, 
Galena, and Copper Basin
255 AM MST Fri Jan 17 2020

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

* WHAT...Snow expected. Total snow accumulations of 2 to 8 
  inches. Winds gusting as high as 35 mph may produce areas of 
  blowing and drifting snow.

* WHERE...Clayton, Stanley, Ketchum, Sun Valley, Galena Summit.

* WHEN...Continuing through 11 PM MST tonight.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Patchy 
  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.

&&

$$

IDZ051-055>057-075-172145-
/O.CON.KPIH.WW.Y.0005.000000T0000Z-200118T0600Z/
Shoshone/Lava Beds-Eastern Magic Valley-
Southern Hills/Albion Mountains-Raft River Region-
Wood River Foothills-
Including the cities of Shoshone, Richfield, Carey, Burley, 
Rupert, Heyburn, Oakley, Albion, Almo, Malta, Rockland, Holbrook,
Hailey, Bellevue, and Picabo
255 AM MST Fri Jan 17 2020

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

* WHAT...Snow expected. Total snow accumulations of up to two
  inches. Winds gusting as high as 45 mph may produce areas of 
  blowing and drifting snow.

* WHERE...Albion, Malta, Rockland, Holbrook, Shoshone, and Hailey.

* WHEN...Continuing through 11 PM MST tonight.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Patchy 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Gusty winds could bring down tree branches.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling.

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

&&

$$

For more information from the National Weather Service visit
https://weather.gov/pocatello
109 
WWUS45 KPIH 172100
WSWPIH

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
200 PM MST Fri Jan 17 2020

IDZ069>074-172200-
/O.CAN.KPIH.WW.Y.0005.000000T0000Z-200118T0600Z/
Lost River Range-Challis/Pahsimeroi Valleys-
Frank Church Wilderness-Sawtooth/Stanley Basin-Sun Valley Region-
Big Lost Highlands/Copper Basin-
Including the cities of Borah Peak, Challis, Clayton, Stanley, 
Ketchum, Sun Valley, Galena, and Copper Basin
200 PM MST Fri Jan 17 2020

...WINTER WEATHER ADVISORY IS CANCELLED...

Some patchy blowing and drifting snow remains possible. But the
threat for significant impacts has ended.

$$

IDZ060-180600-
/O.CON.KPIH.WS.W.0002.000000T0000Z-200118T0600Z/
Bear River Range-
Including the city of Emigration Summit
200 PM MST Fri Jan 17 2020

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

* WHAT...Blowing and drifting snow. Additional snow accumulations
  of up to one inch. Winds gusting as high as 35 mph.

* WHERE...Bear River Range, including Emigration Summit.

* WHEN...Continuing through 11 PM MST tonight.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Patchy 
  blowing snow could significantly reduce visibility. The 
  hazardous conditions could impact the morning or evening 
  commute. Gusty winds could bring down tree branches.

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.

&&

$$

IDZ052>054-067-068-180600-
/O.CON.KPIH.WW.Y.0005.000000T0000Z-200118T0600Z/
Arco/Mud Lake Desert-Upper Snake River Plain-
Lower Snake River Plain-Beaverhead - Lemhi Highlands-
Lost River Valley-
Including the cities of Mud Lake, INL, Craters of the Moon NM, 
Idaho Falls, Rexburg, St. Anthony, Pocatello, Blackfoot, 
American Falls, Shelley, Fort Hall, Dubois, Spencer, Edie School,
Small, Howe, Arco, Mackay, and Chilly
200 PM MST Fri Jan 17 2020

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

* WHAT...Blowing and drifting snow. Winds gusting as high as 35 
  mph.

* WHERE...Pocatello, American Falls, Shelley, Blackfoot, Idaho 
  Falls, Rexburg, INL, Dubois, Fort Hall, St. Anthony, and Lost 
  River Valley.

* WHEN...Continuing through 11 PM MST tonight.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Patchy
  blowing snow could significantly reduce 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.

&&

$$

IDZ058-059-061>066-180600-
/O.CON.KPIH.WW.Y.0005.000000T0000Z-200118T0600Z/
Marsh and Arbon Highlands-Franklin/Eastern Oneida Region-
Bear Lake Valley-Blackfoot Mountains-Caribou Range-
Big Hole Mountains-Teton Valley-Centennial Mountains -
Island Park-
Including the cities of Inkom, McCammon, Downey, 
Lava Hot Springs, Malad, Preston, Thatcher, St. Charles, 
Montpelier, Georgetown, Grace, Soda Springs, Henry, Bone, Wayan, 
Swan Valley, Victor, Ashton, Tetonia, Driggs, Island Park, 
and Kilgore
200 PM MST Fri Jan 17 2020

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

* WHAT...Blowing and drifting snow. Additional snow accumulations
  of up to one inch. Winds gusting as high as 35 mph.

* WHERE...McCammon, Lava Hot Springs, Malad, Preston, 
  Montpelier, Soda Springs, Swan Valley, Driggs, Ashton, Island 
  Park.

* WHEN...Continuing through 11 PM MST tonight.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Patchy
  blowing snow could significantly reduce 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.

&&

$$

IDZ051-055>057-075-180600-
/O.CON.KPIH.WW.Y.0005.000000T0000Z-200118T0600Z/
Shoshone/Lava Beds-Eastern Magic Valley-
Southern Hills/Albion Mountains-Raft River Region-
Wood River Foothills-
Including the cities of Shoshone, Richfield, Carey, Burley, 
Rupert, Heyburn, Oakley, Albion, Almo, Malta, Rockland, Holbrook,
Hailey, Bellevue, and Picabo
200 PM MST Fri Jan 17 2020

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

* WHAT...Blowing and drifting snow. Winds gusting as high as 35 
  mph.

* WHERE...Albion, Malta, Rockland, Holbrook, Shoshone, and 
  Hailey.

* WHEN...Continuing through 11 PM MST tonight.

* ADDITIONAL DETAILS...Plan on slippery road conditions. Patchy
  blowing snow could significantly reduce 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.

&&

$$

For more information from the National Weather Service visit
https://weather.gov/pocatello
785 
WWUS45 KPIH 180032
WSWPIH

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
532 PM MST Fri Jan 17 2020

IDZ060-180145-
/O.CAN.KPIH.WS.W.0002.000000T0000Z-200118T0600Z/
Bear River Range-
Including the city of Emigration Summit
532 PM MST Fri Jan 17 2020

...WINTER STORM WARNING IS CANCELLED...

Winds have begun to subside across the area and the threat of
blowing and drifting snow has diminished. 

$$

IDZ051>059-061>068-075-180145-
/O.CAN.KPIH.WW.Y.0005.000000T0000Z-200118T0600Z/
Shoshone/Lava Beds-Arco/Mud Lake Desert-Upper Snake River Plain-
Lower Snake River Plain-Eastern Magic Valley-
Southern Hills/Albion Mountains-Raft River Region-
Marsh and Arbon Highlands-Franklin/Eastern Oneida Region-
Bear Lake Valley-Blackfoot Mountains-Caribou Range-
Big Hole Mountains-Teton Valley-Centennial Mountains -
Island Park-Beaverhead - Lemhi Highlands-Lost River Valley-
Wood River Foothills-
Including the cities of Shoshone, Richfield, Carey, Mud Lake, 
INL, Craters of the Moon NM, Idaho Falls, Rexburg, St. Anthony, 
Pocatello, Blackfoot, American Falls, Shelley, Fort Hall, Burley,
Rupert, Heyburn, Oakley, Albion, Almo, Malta, Rockland, Holbrook,
Inkom, McCammon, Downey, Lava Hot Springs, Malad, Preston, 
Thatcher, St. Charles, Montpelier, Georgetown, Grace, 
Soda Springs, Henry, Bone, Wayan, Swan Valley, Victor, Ashton, 
Tetonia, Driggs, Island Park, Kilgore, Dubois, Spencer, 
Edie School, Small, Howe, Arco, Mackay, Chilly, Hailey, Bellevue,
and Picabo
532 PM MST Fri Jan 17 2020

...WINTER WEATHER ADVISORY IS CANCELLED...

Winds have begun to subside across much of the area and the 
threat of widespread blowing and drifting snow has diminished. 
Some isolated areas of gusty winds along US-20/26 between Idaho 
Falls and Arco and on I-15 north of Idaho Falls may continue for
another hour or so before winds are expected to diminish there as
well. 

$$

For more information from the National Weather Service visit
https://weather.gov/pocatello

What forecasters said that day

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

NWS Pocatello, ID wrote its last area forecast discussion before this winter storm warning went out at Jan 15, 7:56 PM MST, 6 hours 32 minutes earlier.

Area forecast discussion, Jan 15, 7:56 PM MST, 6 hours 32 minutes before
Area Forecast Discussion
National Weather Service Pocatello ID
756 PM MST Wed Jan 15 2020

.UPDATE...Overall forecast in generally good shape. Broad band of
high clouds spreading over the southern highlands this evening
while region of more dense moisture beginning to spread into the
central mountains. Light precipitation present over the western
portions of the state has not quite made it into the central
mountains as of yet, but snowfall should spread across the region
during the overnight. Winds especially at higher elevations of the
central mountains are quite breezy to windy with a few higher
elevation gusts over 40 mph thus will leave the current Winter
Weather Advisory in place. Other concerns are the very localized
area of fog in the Island Park region, and temperatures in areas
where the cloud cover hasn't reached yet. Have added Patchy Fog
across that region, but have also lowered the overnight lows where
temperatures have already approached or dropped below current
forecast minimums. No further updates are anticipated this
evening. DMH

&&

.PREV DISCUSSION... /issued 131 PM MST Wed Jan 15 2020/

DISCUSSION...A pair of systems will be moving through the
region. The first one arrives tonight. This will bring snow mainly
to the central Idaho mountains roughly from Bellevue to Stanley.
Forecast amounts came down slightly, but still looks like 2 to 6
inches with the heaviest amounts on mountain passes and ridgetop
level. The second system is much more widespread and arrives
Thursday night and persists into Friday. This system will bring
wind to the area beginning around daybreak on Friday. Blowing and
drifting will most likely be problematic with road closures once
again possible, especially in those areas still recovering from
the last series of storms. Forecast snow amounts came down for
this next system as well as the NAM has really backed off on the
amounts, probably because this system is pretty fast-moving.
Still, looking at 2 to 6 corridor from Bellevue to Stanley, as
well as along the eastern highlands. Probably less than 2 inches
elsewhere. Even though there is some uncertainty with the snow
amounts, we are very confident in wind developing and likely
causing problems for eastern Idaho. Therefore we will be issuing a
winter weather advisory for much of east Idaho to specifically
address potential blowing and drifting snow issues.

The parade of storms ends by Saturday as a ridge of high pressure
develops. Could see some light snow in the central mountains and
upper snake highlands on Saturday as moisture rides over the top of
the ridge. But, the ridge will amplify on Sunday and persist
through early next week.

Valle

AVIATION...After days of low CIG and occasional low VSBT due to
snow, eastern Idaho will get a break until 16/06Z tonight, when the
next low pressure moves in and starts to develop mid- and high level
CIGs. A weak impulse will develop isolated snow showers in the
central Idaho mountains, affecting KSUN, but otherwise nothing
impactful happens until Thu night in terms of CIG/VSBY. However, an
approaching front will mean some potential low level wind shear with
strong south to west wind aloft while surface wind is north to east.
It appears as though during the morning on Thu that these strong
southerly wind will come into alignment as the inversion disappears.
Messick

&&

.PIH WATCHES/WARNINGS/ADVISORIES...
Winter Weather Advisory until noon MST Thursday for IDZ072>074.

Winter Weather Advisory from midnight Thursday night to midnight
MST Friday night for IDZ052>054-058>067.

&&

Nearby

Winter Storm Warnings in Idaho, 2020Every winter storm warning in 2020

Sources

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