A developing Pacific system moving northeast from California brought snow and blowing snow to areas north of the Missouri River.

Winter Storm in NORTHERN PHILLIPS, MONTANA
From 22-MAR-11 18:00:00 to 23-MAR-11 07:30:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter reported 6 inches of snowfall.

Winter Storm in NORTHERN VALLEY, MONTANA
From 22-MAR-11 10:52:00 to 23-MAR-11 04:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

At 1052 MST March 22nd, 2 miles south-southeast of Larslan estimated 8 inches of new snowfall fell. Drifts were as high as 5 to 6 feet.

Winter Storm in DANIELS, MONTANA
From 22-MAR-11 08:00:00 to 23-MAR-11 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Beginning 0800 MST on March 22nd, Scobey Super ASOS reported sustained winds over 35 mph with gusts to 50 mph and blizzard conditions. On 0700 on March 23rd, 5 miles east of Flaxville, 4 inches of snow were measured but winds created Winter Storm conditions.

Winter Storm in CENTRAL AND SE PHILLIPS, MONTANA
From 23-MAR-11 00:00:00 to 23-MAR-11 09:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A couple of reports of snowfall were received close to 6 inches. The greatest was at 13 miles southwest of Saco with 6 inches.

Winter Storm in CENTRAL AND SOUTHERN VALLEY, MONTANA
From 23-MAR-11 00:00:00 to 23-MAR-11 12:27:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Generally 4 to 9 inches of snow fell across the area. The least was at 16 miles north-northeast of Frazer at 0700 MST, the greatest came from a Cooperative weather observer 4 miles southwest of Hinsdale with an estimated 9 inches.

Winter Storm in EASTERN ROOSEVELT, MONTANA
From 22-MAR-11 20:17:00 to 23-MAR-11 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter observed 2.4 inches of new snowfall. Blizzard conditions stopped after 2017 MST March 22nd, but due to the wind, winter storm conditions continued across the zone into March 23rd.

Winter Storm in GARFIELD, MONTANA
From 23-MAR-11 05:00:00 to 23-MAR-11 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Generally 3 to 6 inches of new snow fell across the area. The most fell at 8 miles west-northwest of Nelson Creek Recreation Area, the least at Jordan.

Winter Storm in MCCONE, MONTANA
From 23-MAR-11 03:00:00 to 23-MAR-11 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Generally 4 to 8 inches of new snow fell across the area. The least fell 3 miles west-southwest of Weldon, the greatest fell 8 miles south-southwest of Nashua.

Winter Storm in RICHLAND, MONTANA
From 22-MAR-11 16:30:00 to 23-MAR-11 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

New snowfall generally ranged from 2 to 9 inches. The least amount fell 1 mile south of Savage with the greatest amount in Sidney.

Winter Storm in DAWSON, MONTANA
From 23-MAR-11 07:00:00 to 23-MAR-11 12:27:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snow amounts ranged from 5.3 inches to 6.5 inches. The least fell at 17 miles west-southwest of Glendive, with the greatest amount at 2 miles west-southwest of Glendive.

Winter Storm in WIBAUX, MONTANA
From 23-MAR-11 05:00:00 to 23-MAR-11 13:59:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Generally 5 to 6 inches of new snow fell across the area. Amounts ranged from 5.6 in Wibaux to 6 inches 5 miles southeast of Yates.

Winter Storm in SHERIDAN, MONTANA
From 23-MAR-11 00:00:00 to 23-MAR-11 11:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

At 0700 MST March 23rd, a Coop observer reported 3 inches of new snow. At 1059 MST, Weather Spotter at Medicine Lake reported 5 inches of new snow. This combined with 20 to 30 mph winds resulted in winter storm conditions.

Winter Storm in WESTERN ROOSEVELT, MONTANA
From 22-MAR-11 20:17:00 to 23-MAR-11 10:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Blizzard conditions ceased at about 2017 MST on March 22nd, but due to the wind, winter storm conditions continued into March 23rd.