Centennial Mountains-island Park storm history

Extremely heavy snow fell in the Island Park area with the COOP observer reporting 15 inches and amounts of up to 18 inches reported by the public. The Crab Creek SNOTEL had 13 inches and White Elephant SNOTEL had 13 inches. The heavy snow and wind may have contributed to a snowm…

Fifty to 70 mph wind gusts measured in the Centennial Mountains with a peak gust of 69 mph at the Henry's Lake mesonet site 8 miles north of Macks Inn.

Estimated snowfall amounts were 10.8 inches at Island Park and 14.5 inches at White Elephant.

Estimated snowfall amounts at SNOTEL sites were 10.4 inches at Crab Creek, 12.7 inches at Island Park, and 10.4 inches at White Elephant. The Island Park COOP observer recorded 9.3 inches of snow and 8 inches was reported at Macks Inn.

A long period of snowfall brought 6 to 12 inches of snow through Island Park and Ashton Hill, with 12 to 24 inches north of Island Park towards Targhee Pass and West Yellowstone. Island Park measured 15.3 inches of snow, while the White Elephant SNOTEL measured nearly 45 inches o…

Heavy snow and strong winds caused extensive travel problems. Winds gusted 40 to 50 mph. Idaho 47 closed from Ashton to Bear Gulch and estimated SNOTEL snow amounts ranged from 6 to 9 inches at Crab Creek, White Elephant and Island Park.

A long period of snowfall brought 13.6 inches of snow measured at the Island Park COOP site and 11 inches measured by a trained spotter 2 miles north of Macks Inn.

The Gallatin National Forest Avalanche Center reported a report of 1 person partially buried in an avalanche in the Lionhead area near the Idaho/Montana border.

Several days of snow and rain mixed with snow brought a total of 18 inches 2 miles north of Macks Inn. A semi spun out along US Highway 20 near mile marker 367 on Ashton Hill on the 29th at 445 PM MST due to poor road conditions and a crash occurred along US Highway 20 near mile …

US Highway 26 closed from Idaho 87 to the Montana border. Strong winds caused low visibility and lots of crashes and slide offs reported. Snow amounts of 4 to 6 inches in the Island Park area was reported.

A strong Pacific system brought heavy snow and strong winds brought road closures at times for several days. Snow amounts were 17 inches at the Island Park COOP site, 12 inches at Harriman State Park and 11 inches at Warm River. Idaho Highway 27 closed on the 2nd from the US High…

About 70 customers without power reported by Fall River Electric cooperative in the Island Park area as 60 to 70 mph wind gusts were measured.

The snowfall estimate at the White Elephant SNOTEL was 13.8 inches. The Island Park COOP observer measured 7.6 inches and 6 inches fell at Macks Inn.

Heavy snow amounts estimated by SNOTEL were 12.9 inches at Crab Creek, 13.2 inches at Island Park and 22.6 inches at White Elephant. The Island Park COOP site totaled 14.5 inches. The public reported 13 inches of snowfall in Warm River.

A strong cold front brought a combination of snow and strong winds with gusts of 40 to 50 mph. Island Park COOP site measured 7 inches of snowfall. Idaho State Highway 47 was closed due to blowing and drifting snow from Ashton to Bear Gulch.

Snow and strong winds closed Idaho Highway 47 from Ashton to north of Warm River. Island Park measured 7 inches of snow on the 8th and 9th.

Two to 4 inches of snow fell and combined with strong winds to create hazardous travel. Rocky Mountain Power reported 400 customers without power by 530 AM due to the winds and snow in the Ashton area and north. A jackknifed semi trailer occurred on US Highway 20 just north of Id…

A total of 11.5 inches of snow was measured at the Island Park COOP site. 16.3 inches was estimated at the Island Park SNOTEL site and 18.3 inches at the White Elephant SNOTEL site.

The first heavy snowfall of the season fell in the Centennial Mountains. An estimated 22 inches of snow fell at the White Elephant SNOTEL site with 11.3 inches at the Island Park SNOTEL. The Island Park COOP observer recorded 8.2 inches of snow with 6 inches near Macks Inn.

A winter and spring of heavy snow led to snow weight collapsing 3 structures including a garage near Ashton, a farm shed near Ashton and a canopy covering a fuel filling station at Mack's Inn in Island Park. Damages were 30,000 dollars.

Strong winds combined with snowfall to close US Highway 20 from Ashton to the Montana State line and Idaho Highway 87 from Island Park to the Montana state line. Wind gusts of 35 to 60 mph were common throughout the day on April 1st and the highways closed between noon and 5 PM M…

Snowfall amounts from the 24th through the 26th were 10.4 inches at the Island Park COOP site, 12 inches at Macks Inn, and the White Elephant SNOTEL had an estimated 14 inches.

Snowfall amounts during this multi-day event from the 24th through the 26th were 10.4 inches at the Island Park COOP site, 12 inches at Macks Inn, and the White Elephant SNOTEL had an estimated 14 inches.

The Island Park COOP observer measured 10.3 inches of snow with an estimated 11 inches at the White Elephant SNOTEL site. The North Fremont Schools closed early on the 15th due to blowing and drifting snow and near whiteout conditions.

Forty-five to 55 mph wind gusts were widespread on the 10th and combined with heavy snow to close US Highway 20 between Ashton and the Montana state line and Idaho Highway 87 fromn Island Park to the Montana state line. The Island Park COOP site recorded 7.4 inches of snow and 12…

The COOP observer at Island Park measured 12 inches of snow and 6 inches was measured at Macks Inn.

Heavy snowfall amounts were 11 inches at the Island Park COOP, 12 inches in Macks Inn, and 13 inches at Harriman State Park.

Another round of heavy snow and wind gusts of 40 to 60 mph again closed several roads. US Highway 20 closed from Ashton to the Montana state line. Idaho Highway 47 closed from Ashton to Warm River. Idaho Highway 87 closed from Island Park to the Montana state line. 20 inches of s…

Heavy snow and wind gusts over 40 mph shut down US Highway 20 from Ashton to the Montana border and Highway 87 from US 20 to the Montana border. Highway 47 was closed from Ashton to Bear Gulch. North Fremont High School and Ashton Elementary School also closed on the 21st and 22n…

Snow and strong wind gusts over 40 mph caused US Highway 26 to close from Ashton to the Montana border and Highway 87 from US 20 to the Montana border. 3 to 7 inches of snow fell and combined with winds to make some roads unpassable. Fremont County School District 215 closed on t…

Island Park recorded 25 to 40 below zero temperatures with wind chills below 50 below zero. Fremont Joint School District 215 closed due to the cold conditions on the 30th and 31st.

Ten inches of snow fell in Rea and 8 inches fell in Island Park. The snow combined with strong winds closed Idaho Highway 87 from US Highway 20 to the Montana border, Us Highway 20 from Ashton to the Montana border and Idaho 47 east of Ashton.

SNOTEL snowfall estimates were 9.8 inches at Crab Creek and 10.3 inches at White Elephant.

An estimated 12.7 inches of snow fell at the White Elephant SNOTEL site and the Island Park COOP observer measured 11.6 inches.

An estimated 12.7 inches of snow fell at the White Elephant SNOTEL site and the Island Park COOP observer measured 11.6 inches.

Extreme winds caused widespread blowing and drifting snow with extensive road closures. US Highway 20 was closed from Ashton to the Montana state line. State Highway 87 was closed from US 20 to the Montana state line. Fremont County School District 215 was closed on the 21st due …

Extremely heavy snow fell and combined with high winds with gusts 40 to 50 mph to close roads and schools on the 1st and 2nd. Multiple reports of 15 to 20 inches of snowfall was recorded in Island Park. Fremont County School District 215 was closed on the 2nd due to road conditio…

Snow combined with wind gusts over 40 mph caused US Highway 20 to close on the 27th from Ashton to Targhee Pass as well as Idaho Highway 87 between US Highway 20 and Raynolds Pass. Many automobile accidents and slide offs were reported on US 20. Seven to 8 crashes were reported o…

A period of a long atmospheric river event led to extremely heavy snowfall for an extended period. The Island Park COOP observer measured 21 inches of snow. SNOTEL estimates were: 27 inches Crab Creek, 19 inches Island Park, and 39 inches White Elephant.

Estimated snow amounts were 20 inches at White Elephant and 12 inches at Island Park.

Estimated snow amounts were 20 inches at White Elephant and 12 inches at Island Park. Lesser amounts fell at lower elevations with 7.7 inches measured at the Crab Creek Snotel site.

The Sawtell Peak Fire began August 31st but was contained on September 9th and burned only 37 acres but 66 personnel were assigned to the fire and strong winds threatened Island Park but it was contained with no damages.

A boy scout cabin was destroyed in Island Park due to extremely strong winds associated with a cold frontal passage.

Estimated snow amounts at SNOTEL sites were 12 inches at Crab Creek and 21 inches at White Elephant. The COOP observer at Island Park recorded 16.5 inches of snow through the period.

Extreme cold wind chill readings occurred behind a cold frontal passage. Coldest readings on the 23rd were -46 at Henry's Lake at 730 AM, -35 near Spencer at 112 AM, and 033 at Osborne Bridge at 445 AM. Island Park recorded -30 at 654 AM.

Only about 3 inches of snow fell but strong winds caused extensive blowing and drifting snow. Idaho Highway 87 closed 3 miles north of Island Park to the Montana state line by the afternoon of the 21st. Idaho Highway 47 also closed on the morning of the 21st from Ashton to 1 mile…

Whiteout conditions caused by 40 plus mph wind gusts created a 40 vehicle crash on US Highway 20 in the east bound lane on January 7th. It initially occurred when a semi crashed into a stopped vehicle that was stopped due to the low visibility. Ambulances were involved in the pil…

Heavy snow and wind gusts over 40 mph created extremely difficult travel conditions for several days. Estimated SNOTEL amounts were: Island Park 14 inches and White Elephant 13 inches. 8 inches fell at the Island Park COOP site.

Idaho Highway 47 was closed from Ashton to 2 miles north of Warm River. The COOP observer in Island Park measured 17 inches of snow through the last 3 days of the month. Extensive blowing and drifting of snow was reported.

A long period of snow and and periods of strong winds over several days surrounding the Christmas holiday brought extreme travel difficulties. Idaho Highway 47 from Ashton to Warm River, Idaho Highway 87 from Island Park to the Montana border, US Highway from Ashton to the Montan…