A very bitterly cold arctic air mass swung southward from the Canadian prairie, stalled over northeast Montana, and combined with some breezy to gusty winds which allowed wind chill values to plummet to very dangerous levels for the entire region.

Cold/Wind Chill in DANIELS, MONTANA
From 05-JAN-14 00:42:00 to 06-JAN-14 08:45:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

At the Navajo MT-5 DOT site, wind chills of -40 or worse were consistent beginning at 12:42 AM on the 5th until 8:45 AM on the 6th.  Coldest wind chill of -61 occurred on the 5th from 8:45 to 9:00 AM, then again from 9:45 to 10:10 AM.

Cold/Wind Chill in NORTHERN PHILLIPS, MONTANA
From 05-JAN-14 04:50:00 to 05-JAN-14 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

With no functioning observation sites in this zone, we cannot verify the Wind Chill Warning here directly, but given the fact that every other zone in the surrounding region easily verified, by inference, this zone was also allowed to verify using the data from the neighboring northern Valley County.

Cold/Wind Chill in NORTHERN VALLEY, MONTANA
From 05-JAN-14 04:50:00 to 05-JAN-14 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Consistent wind chills across northern Valley County as cold as -40 began as early as 4:50 AM on the 5th and continued as late as 12:00 PM on the 5th. The coldest wind chill of -42 was recorded at 5:44 AM on the 5th at the Bluff Creek RAWS site.

Cold/Wind Chill in EASTERN ROOSEVELT, MONTANA
From 05-JAN-14 02:52:00 to 06-JAN-14 08:25:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Consistent wind chills across eastern Roosevelt County as cold as -40 began as early as 2:52 AM on the 5th and continued as late as 8:25 AM on the 6th. The coldest wind chill of -54 was recorded at 10:48 AM on the 5th at the Stateline US-2 DOT site.

Cold/Wind Chill in CENTRAL AND SE PHILLIPS, MONTANA
From 05-JAN-14 04:10:00 to 05-JAN-14 12:45:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Consistent wind chills across central and southeastern Phillips County as cold as -40 began as early as 4:10 AM on the 5th and continued as late as 12:45 PM on the 5th. The coldest wind chill of -48 was recorded at 8:09 AM on the 5th at the Saco US-2 DOT site.

Cold/Wind Chill in CENTRAL AND SOUTHERN VALLEY, MONTANA
From 05-JAN-14 02:15:00 to 06-JAN-14 02:15:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Consistent wind chills across central and southern Valley County as cold as -40 began as early as 2:15 AM on the 5th and continued as late as 2:15 AM on the 6th. The coldest wind chill of -56 was recorded at 9:00 AM on the 5th at the Saint Marie mesonet site.

Cold/Wind Chill in PETROLEUM, MONTANA
From 05-JAN-14 06:00:00 to 05-JAN-14 07:15:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Consistent wind chills across Petroleum County as cold as -40 began as early as 6:00 AM on the 5th and continued as late as 7:15 AM on the 6th. The coldest wind chill of -40 was recorded at 6:22 AM on the 5th at the Chain Buttes RAWS site.

Cold/Wind Chill in GARFIELD, MONTANA
From 05-JAN-14 04:50:00 to 05-JAN-14 11:45:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Consistent wind chills across Garfield County as cold as -40 began as early as 4:50 AM on the 5th and continued as late as 11:45 AM on the 5th. The coldest wind chill of -47 was recorded at 7:07 AM on the 5th at the Lufborough Hill MT-200 DOT site.

Cold/Wind Chill in MCCONE, MONTANA
From 05-JAN-14 04:30:00 to 05-JAN-14 20:05:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Consistent wind chills across McCone County as cold as -40 began as early as 4:30 AM on the 5th and continued as late as 4:05 AM on the 5th. The coldest wind chill of -52 was recorded at 11:01 AM on the 5th at the Cow Creek MT-13 DOT site.

Cold/Wind Chill in RICHLAND, MONTANA
From 05-JAN-14 03:30:00 to 06-JAN-14 05:50:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Consistent wind chills across Richland County as cold as -40 began as early as 3:30 AM on the 5th and continued as late as 5:50 AM on the 6th. The coldest wind chill of -54 was recorded at 10:29 AM on the 5th at the Sioux Pass MT-16 DOT site.

Cold/Wind Chill in DAWSON, MONTANA
From 05-JAN-14 04:05:00 to 06-JAN-14 06:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Consistent wind chills across Dawson County as cold as -40 began as early as 4:05 AM on the 5th and continued as late as 6:30 AM on the 6th. The coldest wind chill of -57 was recorded during the mid-day hours on the 5th at the Lindsay mesonet site.

Cold/Wind Chill in PRAIRIE, MONTANA
From 05-JAN-14 03:45:00 to 05-JAN-14 21:21:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Consistent wind chills across Prairie County as cold as -40 began as early as 3:45 AM on the 5th and continued as late as 9:21 PM on the 5th. The coldest wind chill of -52 was recorded at 10:08 AM on the 5th at the Big Sheep Mountain RAWS site.

Cold/Wind Chill in LITTLE ROCKY MOUNTAINS, MONTANA
From 05-JAN-14 02:55:00 to 05-JAN-14 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Consistent wind chills across southwestern Phillips County as cold as -40 began as early as 2:55 AM on the 5th and continued as late as 11:00 AM on the 5th. The coldest wind chill of -53 was recorded at 7:21 AM on the 5th at the Hays MT-66 DOT site.

Cold/Wind Chill in SHERIDAN, MONTANA
From 04-JAN-14 23:42:00 to 06-JAN-14 10:02:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Consistent wind chills across Sheridan County as cold as -40 began as early as 11:42 PM on the 4th and continued as late as 10:02 AM on the 6th.  The coldest wind chill of -63 was recorded at 9:30 AM on the 5th at the Comertown Turn-Off MT-5 DOT site.

Cold/Wind Chill in WESTERN ROOSEVELT, MONTANA
From 05-JAN-14 00:30:00 to 06-JAN-14 09:09:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Consistent wind chills across western Roosevelt County as cold as -40 began as early as 12:30 AM on the 5th and continued as late as 9:09 AM on the 6th. The coldest wind chill of -59 was recorded at 9:46 AM on the 5th at the McDonalds MT-13 DOT site.

Cold/Wind Chill in WIBAUX, MONTANA
From 05-JAN-14 04:58:00 to 06-JAN-14 08:26:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

With the Beaver Hill I-94 DOT site very near the edge of Wibaux County, it was allowed to verify this warning for this zone. Consistent wind chills as cold as -40 began as early as 4:58 AM on the 5th and continued as late as 8:26 AM on the 6th. The coldest wind chill of -54 was recorded at 12:51 PM on the 5th at the Beaver Hill I-94 DOT site.