The first big fall storm moved through the region bringing widespread precipitation and heavy mountain snow. Strong winds developed over the Rocky Mountain Front and in the Cut Bank area as well. The first wave of precipitation moved into the region Tuesday afternoon becoming steadier by Tuesday evening. A second wave of moisture moved into Southwest Montana on Wednesday morning. Snow levels dropped to valley floors in many Southwest Montana locations. Heavy snow was seen in the mountains, especially above 6000 feet. Southwest flow aloft and a moist, unstable airmass over Southwest Montana resulted in somewhat isolated afternoon and evening convective development that produced some strong outflow winds as well.

Heavy Snow in JEFFERSON, MONTANA
From 25-SEP-13 13:00:00 to 26-SEP-13 01:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow measuring 9.0 inches in 12 hours reported at the Rocker Peak SNOTEL. Elevation 8000 feet.

Heavy Snow in MADISON, MONTANA
From 25-SEP-13 13:00:00 to 26-SEP-13 01:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow measuring 8.0 inches in 12 hours reported at the Lower Twin SNOTEL. Elevation 7900 feet.

Heavy Snow in MADISON, MONTANA
From 25-SEP-13 13:00:00 to 26-SEP-13 01:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow measuring 8.0 inches in 12 hours reported at the Albro Lake SNOTEL. Elevation 8300 feet.

Heavy Snow in BEAVERHEAD, MONTANA
From 25-SEP-13 13:00:00 to 26-SEP-13 01:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow measuring 6.0 inches in 12 hours reported at the Lemhi Ridge SNOTEL. Elevation 8100 feet.

Heavy Snow in MEAGHER, MONTANA
From 25-SEP-13 14:00:00 to 26-SEP-13 02:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow measuring 10.0 inches in 12 hours reported at the Elk Peak SNOTEL. Elevation 7600 feet.

Heavy Snow in BROADWATER, MONTANA
From 25-SEP-13 14:00:00 to 26-SEP-13 02:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow measuring 9.0 inches in 12 hours reported at the Boulder Mountain SNOTEL. Elevation 7950 feet.

Heavy Snow in JEFFERSON, MONTANA
From 25-SEP-13 14:00:00 to 26-SEP-13 02:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow measuring 6.0 inches in 12 hours reported at the Frohner Meadow SNOTEL. Elevation 6480 feet.

Heavy Snow in NORTH ROCKY MOUNTAIN FRONT, MONTANA
From 25-SEP-13 15:00:00 to 26-SEP-13 03:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow measuring 8.0 inches in 12 hours, and 11.0 inches in 24 hours, reported at the Badger Pass SNOTEL. Elevation 6900 feet.

Heavy Rain in MADISON, MONTANA
From 25-SEP-13 07:42:00 to 26-SEP-13 07:42:00 (MST-7)
Location: LAVON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Storm total rainfall of 1.00 inches reported near Melrose, MT.

Thunderstorm Wind in BEAVERHEAD, MONTANA
From 24-SEP-13 17:33:00 to 24-SEP-13 17:33:00 (MST-7)
Location: (DLN)DILLON ARPT
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

High winds measuring 52KT (60MPH) reported at Dillon Airport ASOS.

Thunderstorm Wind in GALLATIN, MONTANA
From 24-SEP-13 19:25:00 to 24-SEP-13 19:25:00 (MST-7)
Location: CHESTNUT
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

High winds measuring 51KT (59MPH) reported at Bozeman Pass.

Heavy Snow in NORTH ROCKY MOUNTAIN FRONT, MONTANA
From 24-SEP-13 18:00:00 to 25-SEP-13 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow measuring 9.0 inches in 24 hours reported at the Badger Pass SNOTEL. Elevation 6900 feet.

Heavy Snow in BEAVERHEAD, MONTANA
From 25-SEP-13 11:00:00 to 25-SEP-13 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow measuring 8.0 inches in 12 hours reported at the Darkhorse Lake SNOTEL. Elevation 8701 feet.

Heavy Snow in BEAVERHEAD, MONTANA
From 25-SEP-13 12:00:00 to 26-SEP-13 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow measuring 9.0 inches in 24 hours reported at the Mule Creek SNOTEL. Elevation 8300 feet.