10/23 Update: Western Snow + Three Cold Fronts

Tomer’s Take: The first of three cold fronts moves across the Banff, MT, WY today (10/23). The two remaining cold fronts are more significant 10/24-10/29 with additional jet stream support and colder air.

Colorado remains abnormally warm until 10/28 when the 3rd cold front arrives.

My forecast video:

Timeline

10/23: 1st Cold Front, Banff, MT, WY.

10/24-10/26: 2nd Cold Front, PNW, ID, MT, WY, Northern CA, UT, C+N CO.

10/27-10/29: 3rd Cold Front, WY, UT, CO.

Current Setup

Water vapor satellite shows a large area of low pressure lurking over the Pacific. It’ll help set the pattern with lobes of low pressure sliding down the jet stream from Canada across the West.

Red/orange = drier air aloft.

Forecast Jet Stream

Cold front #2: Forecast jet stream valid 10/25. Notice the dip in the jet over the PNW where an area of low pressure is digging south.

Cold front #3 dropping south.

Cold Front #3: Delivers a sharp drop in air temps.

Forecast Radar/Satellite

Forecast Rain/Snow Line

Wasatch, UT, (Min/Max Level):

10/23: 11200’/12000′

10/24: 10500’/11800′

10/25: 11300’/12100′

10/26: 7200/9500′

10/27: 6600’/8900′

10/28: 5900’/6900′

Central Mountains, CO:

10/23: 11600/14300

10/24: 11000/13900

10/25: 11300/14300

10/26: 9500/13500

10/27: 10500/13300

10/28: 9800/12600

Teton Range, WY:

10/23: 9800/10800

10/24: 8700/10200

10/25: 9200/10300

10/26: 2500/8400

10/27: 2600/6200

10/28: 2300/6100

Forecast Snowfall

*Afternoon Update 10/23.

10/23-10/27:

*Afternoon Update 10/23

10/28-10/29:

Examples

Teton Range, WY:

10/23: 1-2″

10/25: 4″

10/26: 8″

10/28: 1-3″

Alta/Snowbird, UT:

10/23: Trace R/S

10/26: 6-10″

10/27: PM 2″

10/28: 3-6″

Aspen/Snowmass, CO:

10/26: PM 1″ or less

10/27: PM 1″ or less

10/28: PM 1-2″

10/29: 4-8″