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Mountain West Discussion


Chinook

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I had a dusting of snow accumulation tonight, maybe 1/2" on the ground.

BTW

this is just a beautiful crazy post from Typhoon Tip (on a totally different subject) I think this was posted 3 days ago or something.

"

2) What is being depicted by this GGEM and GFS, individually, and in blend, are/is pushing the upper bounds of what can happen on this planet. Earth only rotates so fast. The temperature variation involved in the baroclinicity, and prior to the introduction of the Tropics combined can only express so much power - beyond which is simply not available to Terran physics. We are, in the end, not talking about a comet impact. The reason this facet is important is that when "edge of the envelope" events are modeled, the downside to determinism is that the closer to perfection one succeeds, the more possibilities emerge to prevent that realization. It's like the elusive 105F day at Logan because a 747 took off and blew a parcel of sea air in the wrong direction - something will find a way to f things up.

"

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I'd say winds were sustained 20-30mph with 40-50mph gusts. It wasn't like that all day though. Temps were pretty warm when the winds weren't blowing, I'd say in the low 20s. It was actually really nice weather. snowing3.gif

Yeah, I went skiing on st marys glacier (james peak) on saturday with similar conditions. Definetly 50-60 mph gusts at 11,000-11,500 feet. Some crazy guys actually summitted that morning.

Just reminds me of how much I cant wait for backcountry skiing and winter mountaineering season to start.

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Models remain consistent with this trough crashing in here. Looks like a couple of inches fall on Friday with the front and snow showers on Saturday could drop a couple more. High temps should be in the low 30s Saturday which is rare here for this early in the season. Low temps should bottom out near 20, but I can't say for sure till I see how much snow there is.

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Models remain consistent with this trough crashing in here. Looks like a couple of inches fall on Friday with the front and snow showers on Saturday could drop a couple more. High temps should be in the low 30s Saturday which is rare here for this early in the season. Low temps should bottom out near 20, but I can't say for sure till I see how much snow there is.

I'll be coming into Salt Lake on Saturday for a conference next week. This whole system should make for an interesting flight in.

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The 18z GFS shows -15.5*C 850mb temperature for Montana on Saturday (00z Sunday). That's pretty impressive for this time of year (like 20C below normal). That would be -15.5*C at Fort Collins if it got here. Certainly this will be a very cold and snowy trough for the northern Rockies and Montana. The GFS shows 20*F temps for Denver/Fort Collins on Sunday, and over 12" of snow for parts of Montana -and- North Dakota.

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MT/ND SmartCast 24-HR Outlook

Currently tracking Glasgow, Lewiston, and LM Clayton areas with high threat of snow, blowing snow, and high winds. Looking for wind gusts up to 58MPH around the Glasgow Region.

Glasgow Region: Looking for snow to begin around 21Z through 09/16Z. Heaviest snowfall will occur between 02Z and 06Z, in addition, visibilities will drop to ½ to 1 mile with blowing snow. Winds will be 20-25MPH Gusting to 35MPH til 00Z, then 00Z onward, winds increase to 30-35MPH with Gusts up to 58MPH. Blizzard threat highest from 03Z onward. Wind chills will also decrease to 0-10F above after 09/13Z.

Lewiston Region: Continue Snow with visibilities around ¾ to 2 miles through the day. Winds will be 15-20MPH with gusts to 25MPH. 24HR Snowfall accumulation is at 2.56” and trending upward.

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Models have trended a bit drier with my storm but still on track as a whole. Cold front comes through tomorow morning with some rain switching to snow if it keeps precipitating. It will then be cold enough for snow through Sunday. Snow showers most likely Friday evening, Saturday morning, and Sunday morning.

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Models have trended a bit drier with my storm but still on track as a whole. Cold front comes through tomorow morning with some rain switching to snow if it keeps precipitating. It will then be cold enough for snow through Sunday. Snow showers most likely Friday evening, Saturday morning, and Sunday morning.

This is a nice looking storm for the Wasatch Front. I almost feel removed from forecasting UT after 3 years now, I never underestimate the Salty Toilet (Salt Lake) to spit out snow in cold NW flow.

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Looks like a long duration snow event for Montana. Glasgow NWS office says "BUFKIT INDICATES 850MB WINDS SLOWLY RAMPING UP THURSDAY NIGHT AND BECOMING STRONGEST ON FRIDAY...THEN REACHING AROUND 40KTS BY FRIDAY NIGHT. THE 850MB WINDS WILL BE MIXING TO THE SURFACE WITH THE CAA. SO BLIZZARD CONDITIONS AND VISIBILITY COULD BE ACHIEVED TONIGHT THROUGH FRIDAY NIGHT NORTH OF THE MISSOURI RIVER. "

Here are some lenticular pictures

post-1182-0-86589000-1352406643_thumb.jp

post-1182-0-14264300-1352406645_thumb.jp

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This is a nice looking storm for the Wasatch Front. I almost feel removed from forecasting UT after 3 years now, I never underestimate the Salty Toilet (Salt Lake) to spit out snow in cold NW flow.

18z NAM looks amazing. Some type of snow band sits over my area from tomorrow afternoon through midday Saturday. I could go for that. Down here we don't get anything from the lake unless its really ripping and that may be the case this go around as the lake is quite warm and the air quite cold thats coming in. I am forecasting 1-3 here in Provo, but that could be a lowball estimate. SLC on the other hand will probably see 2-6+ depending on lake effect.

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