An extremely powerful Pacific storm system spread into the central mountains on March 1st and overspread all of southeast Idaho on the 2nd and continued in the far east through the 4th.   Many mountain locations received over 2 feet of snow and even low elevations received 6 to 12 inches from the storm.   Many road closures were reported most notably interstate 15 from Dubois to the Montana border on the 2nd.

Winter Storm in EASTERN MAGIC VALLEY, IDAHO
From 02-MAR-18 03:00:00 to 05-MAR-18 04:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

The city of Richfield received 7 inches of snow with the Minidoka Schools closing from the storm on March 5th when strong winds after the snow fell made rural roads very dangerous to travel on the morning of the 5th.

Winter Storm in SAWTOOTH MOUNTAINS, IDAHO
From 01-MAR-18 05:00:00 to 04-MAR-18 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow amounts at the following SNOTEL sites:  Bear Canyon 21 inches, Mill Creek Summit 12 inches, Smiley Mountain 30 inches, and Stickney Mill 16 inches.

Winter Storm in UPPER SNAKE HIGHLANDS, IDAHO
From 01-MAR-18 10:00:00 to 04-MAR-18 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Extremely heavy snow and strong winds occurred in the Upper Snake Highlands for several days.   Interstate 15 closed from Dubois to the Montana border on the 2nd.  Idaho 32 closed from Ashton to Tetonia and Idaho 47 closed from mile marker 0 to 28.   Heavy snow amounts reported by spotters and COOP observers were:  12 inches in Island Park, 13 inches Driggs, 10 inches Saint Anthony, 14 inches in Small, 13 inches 6 miles west of Kilgore, and 14 inches 4 miles north of Rea.   SNOTEL amounts were 14 inches at Crab Creek and 16 inches at White Elephant.

Winter Storm in UPPER SNAKE RIVER PLAIN, IDAHO
From 02-MAR-18 04:00:00 to 04-MAR-18 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A winter storm dropped heavy snow for several days the first few days of March.  Amounts reported by spotters and COOP observers were the following:  Idaho Falls 9 inches, Rexburg 6 inches, Rigby 11 inches, and Sugar City 10 inches.

Winter Storm in LOWER SNAKE RIVER PLAIN, IDAHO
From 02-MAR-18 02:00:00 to 04-MAR-18 07:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Heavy snow fell in the Lower Snake River Plain with 5 inches in Fort Hall, 6.5 inches in downtown Pocatello and 10 inches on the Pocatello benches.

Winter Storm in SOUTH CENTRAL HIGHLANDS, IDAHO
From 01-MAR-18 04:00:00 to 04-MAR-18 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Heavy snow amounts reported were 13 inches in Malad City and 13 inches 4 miles north northeast of Holbrook.

Winter Storm in CARIBOU HIGHLANDS, IDAHO
From 02-MAR-18 02:00:00 to 04-MAR-18 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A powerful winter storm dropped extremely heavy snow in the Caribou Highlands with spotters and COOP observers reporting the following amounts:  Lava Hot Springs 22 inches, Soda Springs 17 inches, Downey 23 inches, McCammon 22 inches, Swan Valley 16 inches.

Winter Storm in CACHE VALLEY/IDAHO PORTION, IDAHO
From 02-MAR-18 05:00:00 to 04-MAR-18 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A winter storm brought heavy snow to the Cache Valley with 12 inches of snow reported in the city of Preston.

Winter Storm in CACHE VALLEY/IDAHO PORTION, IDAHO
From 02-MAR-18 05:00:00 to 04-MAR-18 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A winter storm brought heavy snow to the Cache Valley with 12 inches of snow reported in the city of Preston.

Winter Storm in BIG AND LITTLE WOOD RIVER REGION, IDAHO
From 01-MAR-18 04:00:00 to 03-MAR-18 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A very powerful winter storm brought heavy snow and strong winds to the Wood River Region.   The storm caused a rare closing of Blaine County Schools on March 2nd.   Snow amounts reported by COOP observers and spotters were the following:  Hailey 19 inches, Picabo 17 inches, Bellevue 16 inches and Ketchum 20 inches.   SNOTEL amounts were:  Chocolate Gulch 23 inches, Dollarhide Summit 12 inches, Garfield Ranger Station 15 inches, Galena 21 inches, Galena Summit 35 inches, Hyndman 20 inches, Lost Wood Divide 23 inches, Swede Peak 38 inches and Vienna Mine 37 inches.

Winter Storm in LOST RIVER / PAHSIMEROI, IDAHO
From 01-MAR-18 04:00:00 to 03-MAR-18 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Very heavy snow fell in both the low and high elevations of the Lost River/Pahsimeroi region.   The city of Mackay reported 11 inches with the Hilt's Creek SNOTEL recording 36 inches.