Extremely cold temperatures combined with high winds to cause dangerously cold wind chills from the 29th through the 31st.   Several schools closed on the 30th and 31st due to the cold.

Extreme Cold/Wind Chill in CARIBOU RANGE, IDAHO
From 29-JAN-23 14:00:00 to 31-JAN-23 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Fifteen to 25 below zero temperatures were common with wind chills below 40 below zero.

Extreme Cold/Wind Chill in FRANK CHURCH WILDERNESS, IDAHO
From 26-JAN-23 15:00:00 to 31-JAN-23 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Three miles west of Custer recorded -29 and Bonanza -30.   Wind chills were below 50 below zero.

Extreme Cold/Wind Chill in UPPER SNAKE RIVER PLAIN, IDAHO
From 29-JAN-23 12:00:00 to 31-JAN-23 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Some of the extreme cold temperatures recorded on the 30th were the following:  Sugar City -39, Rigby -35, Thornton -33, Osgood -33, Ucon -30, Idaho Falls Airport -30, and Roberts -30.  Wind choll readings were colder than 50 below zero.  Due to the extreme cold the following schools were closed on the 30th and 31st:  Idaho Falls School District 91, Bonneville County Joint School District 93, Ririe School District 252, Madison School District 321, and Sugar-Salem School District 322.

Extreme Cold/Wind Chill in BIG LOST HIGHLANDS-COPPER BASIN, IDAHO
From 29-JAN-23 12:00:00 to 31-JAN-23 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Twenty five to 40 below temperatures were recorded with the coldest -37 at Copper Basin.

Extreme Cold/Wind Chill in CENTENNIAL MOUNTAINS-ISLAND PARK, IDAHO
From 29-JAN-23 12:00:00 to 31-JAN-23 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

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.

Extreme Cold/Wind Chill in CHALLIS-PAHSIMEROI VALLEYS, IDAHO
From 29-JAN-23 14:00:00 to 31-JAN-23 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The Challis ASOS recorded -22 on the 30th with wind chills below 30 below.

Extreme Cold/Wind Chill in FRANKLIN-EASTERN ONEIDA REGION, IDAHO
From 29-JAN-23 15:00:00 to 31-JAN-23 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Malad City, Preston, and Weston recorded -15 to -20 degree temperatures on the 30th with wind chills colder than 30 below zero.   The Preston School Distyrict 201 had 2 hour delays due to the cold on the 30th and 31st.

Extreme Cold/Wind Chill in LOST RIVER VALLEYS, IDAHO
From 29-JAN-23 14:00:00 to 31-JAN-23 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Twenty to 30 below zero temperatures were widespread on the 30th with wind chills 50 below zero or colder.  The Mackay School District 182 was closed on the 30th due to the extreme cold.

Extreme Cold/Wind Chill in LOWER SNAKE RIVER PLAIN, IDAHO
From 29-JAN-23 15:00:00 to 31-JAN-23 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Minus 15 to -30 temperatures were widespread on the 30th with the coldest -28 at Taber with -23 at Blackfoot.   -25 to -40 wind chills were common.   The following schools were closed due to the extreme cold on the 30th and 31st:  Pocatello-Chubbuck School District 25, American Falls School District 381, Snake River School District 52, Blackfoot School District 55, Aberdeen School District 58, Shelley School District 60, Firth School District 59, and Shoshone Bannock School District 537.

Extreme Cold/Wind Chill in RAFT RIVER REGION, IDAHO
From 29-JAN-23 14:00:00 to 31-JAN-23 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Minus 28 degrees was recorded at Idahome on the 30th.   Wind chills reached 40 below or colder.   Due to the extreme cold Rockland School District 382 was closed on the 30th and Oneida School District 351 started 2 hours late.

Extreme Cold/Wind Chill in TETON VALLEY, IDAHO
From 29-JAN-23 12:00:00 to 31-JAN-23 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A temperatures of 31 below zero was measured at the Driggs airport and -26 in Ashton on the 30th.   Wind chill readings were widespread below 50 below zero.   Fremont County School District 215 and Teton School District 401 were both closed on the 30th and 31st due to the extreme cold conditions.

Extreme Cold/Wind Chill in BEAVERHEAD-LEMHI HIGHLANDS, IDAHO
From 29-JAN-23 18:00:00 to 31-JAN-23 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Local Official

Ten to 20 below zero temperatures caused the closing of Clark County 161 on the 30th.  Wind chills were below 50 below zero.

Extreme Cold/Wind Chill in BEAR LAKE VALLEY, IDAHO
From 29-JAN-23 20:00:00 to 31-JAN-23 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Local Official

Minus 15 to -30 temperatures were common on the 30th.   Bear Lake School District 33 was closed on the 30th due to the extreme cold conditions.  Wind chill values were 30 to 40 below zero.

Extreme Cold/Wind Chill in BLACKFOOT MOUNTAINS, IDAHO
From 29-JAN-23 16:00:00 to 31-JAN-23 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Twenty to 40 below temperatures and 50 below and colder wind chills caused Grace School District 148 and Soda Springs School District 150 to close on the 30th and 31st.

Extreme Cold/Wind Chill in ARCO-MUD LAKE DESERT, IDAHO
From 29-JAN-23 18:00:00 to 31-JAN-23 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Minus 25 to -40 temperatures were common with the following school closures on the 30th:  Jefferson School District 251, and Butte County School District 111.  Wind chill readings of below -50 were recorded.

Extreme Cold/Wind Chill in MARSH AND ARBON HIGHLANDS, IDAHO
From 29-JAN-23 15:00:00 to 31-JAN-23 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Coldest temperatures recorded on the 30th were -29 Downey, -21 Lava Hot Springs, and -20 Inkom.   Wind chills were in the -30 to -40 range.  Due to the extreme cold Marsh Valley School District 21 and Rockland School District 382 were closed on the 30th.

Extreme Cold/Wind Chill in BIG HOLE MOUNTAINS, IDAHO
From 29-JAN-23 18:00:00 to 31-JAN-23 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Local Official

Ten to 20 below temperatures were common and Teton School District 401 was closed on the 30th.  Wind chill values were below 30 below zero.