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Author Topic: Dec 6-8th Atmospheric River Chase  (Read 2929 times)

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Offline Nashville_Wx

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Dec 6-8th Atmospheric River Chase
« on: December 04, 2019, 01:54:20 PM »
Some years I luck out and some years I can move a inch once I get where I am going. This event is looking pretty solid with plenty QPF on tap. I stay around 6600ft while in South Lake Tahoe. Looking like 3 feet+ above 7500ft from previous experience along the Sierra Crest. Will be posting pics from lake level. Have to leave Tahoe to drive to Mammoth Sunday Morning for the PSIA Fall Rally. Going to be skiing with Glen Plake and Nick Herring ! Anyways, fun to track and watch. Things change quickly in the mountains esp when forecasting snow levels. I come back the 12th and its looking like cold in the East with a possible storm track that favors our region into the middle of end of December.

Quote
URGENT - WINTER WEATHER MESSAGE
National Weather Service Reno NV
226 PM PST Tue Dec 3 2019

CAZ072-NVZ002-050000-
/O.NEW.KREV.WS.A.0016.191207T0000Z-191208T2000Z/
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Truckee, Stateline,
and Incline Village
226 PM PST Tue Dec 3 2019

...WINTER STORM WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH
SUNDAY MORNING...

* WHAT...Heavy snow likely for the Sierra. Total snow
  accumulations of 1 to 3 feet above 7000 feet with locally higher
  amounts possible. Depending on the snow levels, elevations
  between 5500-6500 feet could see accumulations of a few inches
  up to 2 feet. Winds could gust as high as 55 mph.

* WHERE...Greater Lake Tahoe Area.

* WHEN...From Friday afternoon through Sunday morning.

* IMPACTS...Travel could be very difficult to impossible. The
  hazardous conditions could start as early as Friday afternoon
  and last into Sunday evening along Sierra passes. Strong winds
  could cause tree damage.

* ADDITIONAL DETAILS...Snow levels are currently forecast to hover
  near or just above Lake Tahoe level, so impacts could vary
  dramatically within just a few hundred feet of elevation. The
  most likely time for accumulating snow at Lake Tahoe level will
  be late Saturday into Sunday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Now is the time to prepare an emergency kit for your home and
car. If traveling consider alternate plans, remember to carry
tire chains, extra food, water and clothing. Once the storm
arrives, travel may be difficult or impossible for an extended
period of time.


Offline mamMATTus

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Re: Dec 6-8th Atmospheric River Chase
« Reply #1 on: December 04, 2019, 07:20:28 PM »
Some years I luck out and some years I can move a inch once I get where I am going. This event is looking pretty solid with plenty QPF on tap. I stay around 6600ft while in South Lake Tahoe. Looking like 3 feet+ above 7500ft from previous experience along the Sierra Crest. Will be posting pics from lake level. Have to leave Tahoe to drive to Mammoth Sunday Morning for the PSIA Fall Rally. Going to be skiing with Glen Plake and Nick Herring ! Anyways, fun to track and watch. Things change quickly in the mountains esp when forecasting snow levels. I come back the 12th and its looking like cold in the East with a possible storm track that favors our region into the middle of end of December.

Quote
URGENT - WINTER WEATHER MESSAGE
National Weather Service Reno NV
226 PM PST Tue Dec 3 2019

CAZ072-NVZ002-050000-
/O.NEW.KREV.WS.A.0016.191207T0000Z-191208T2000Z/
Greater Lake Tahoe Area-
Including the cities of South Lake Tahoe, Truckee, Stateline,
and Incline Village
226 PM PST Tue Dec 3 2019

...WINTER STORM WATCH IN EFFECT FROM FRIDAY AFTERNOON THROUGH
SUNDAY MORNING...

* WHAT...Heavy snow likely for the Sierra. Total snow
  accumulations of 1 to 3 feet above 7000 feet with locally higher
  amounts possible. Depending on the snow levels, elevations
  between 5500-6500 feet could see accumulations of a few inches
  up to 2 feet. Winds could gust as high as 55 mph.

* WHERE...Greater Lake Tahoe Area.

* WHEN...From Friday afternoon through Sunday morning.

* IMPACTS...Travel could be very difficult to impossible. The
  hazardous conditions could start as early as Friday afternoon
  and last into Sunday evening along Sierra passes. Strong winds
  could cause tree damage.

* ADDITIONAL DETAILS...Snow levels are currently forecast to hover
  near or just above Lake Tahoe level, so impacts could vary
  dramatically within just a few hundred feet of elevation. The
  most likely time for accumulating snow at Lake Tahoe level will
  be late Saturday into Sunday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Now is the time to prepare an emergency kit for your home and
car. If traveling consider alternate plans, remember to carry
tire chains, extra food, water and clothing. Once the storm
arrives, travel may be difficult or impossible for an extended
period of time.

Jealous. This sounds like a killer adventure!

Offline Nashville_Wx

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Re: Dec 6-8th Atmospheric River Chase
« Reply #2 on: December 05, 2019, 09:10:58 PM »
Bust potential at lake level. Absolutely! Imagine if the Nashville NWS service issued a 0-8" forecast for all....Luckily this helps with Travel as 395 from Tahoe to Mammoth should stay pretty good. Above 7500ft is going to be the tits.


Offline Nashville_Wx

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Re: Dec 6-8th Atmospheric River Chase
« Reply #3 on: December 07, 2019, 08:43:03 PM »
Heavy snow with Ridge Gusts today up to 100MPH. At lake level now and it looks like its about to turn soon. Strong wording of Thundersnow tonight, I am going to try and get some videos. 4am drive down 395 to mammoth, wish us luck.

« Last Edit: December 07, 2019, 08:58:56 PM by Nashville_Wx »


Offline harlequin

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Re: Dec 6-8th Atmospheric River Chase
« Reply #4 on: December 08, 2019, 05:20:48 PM »
My garage flooded yesterday afternoon during my first thunderstorm in San Francisco. I hadn't heard a clap of thunder since a trip back home in Summer 2018!

A small area on the windward side of Big Sur got over 18" of rain when the atmospheric river trained there over the past couple of days.

Offline Nashville_Wx

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Re: Dec 6-8th Atmospheric River Chase
« Reply #5 on: December 17, 2019, 11:36:17 AM »
Images from the Southern Sierra and Minarets. Overall snow at lake level was about 2" and 1' about 400ft higher. Then about 7000, we did 2+. Mammoth did much more above 8,000. Perfect wind buff after several days of the snow setting up. You can see several slides above the upper mountain was getting prepped for the day. Enjoy! Heading to the Front Range tomorrow to get some sunshine and a couple more clinics in.

Mono Lake





« Last Edit: December 17, 2019, 11:46:11 AM by Nashville_Wx »


Offline Thundersnow

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Re: Dec 6-8th Atmospheric River Chase
« Reply #6 on: December 17, 2019, 11:59:13 AM »
I saw the news of an avalanche fatality in Utah. That's always a hazard following these storms.
"To say you have no choice... is a failure of imagination."
                                                           - Jean Luc Picard

Offline Nashville_Wx

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Re: Dec 6-8th Atmospheric River Chase
« Reply #7 on: December 17, 2019, 04:50:00 PM »
I saw the news of an avalanche fatality in Utah. That's always a hazard following these storms.

Yup, he went into the BC alone and without BC gear and any experience. There is not much room for error, even when you are being considerate of avy conditions.


Offline StormNine

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Re: Dec 6-8th Atmospheric River Chase
« Reply #8 on: December 17, 2019, 05:14:24 PM »
I saw the news of an avalanche fatality in Utah. That's always a hazard following these storms.

I remember someone posting the deadliest hazard in each NWS CWA.  A lot of the NWS CWA regions out West reported Avalanches as their deadliest hazard. 

Offline Nashville_Wx

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Re: Dec 6-8th Atmospheric River Chase
« Reply #9 on: December 17, 2019, 08:02:38 PM »
I remember someone posting the deadliest hazard in each NWS CWA.  A lot of the NWS CWA regions out West reported Avalanches as their deadliest hazard.

They are extremely dangerous. The best "powder conditions" are usually during considerable/High risk. Without understand the condition of the snow pack and weather conditions its not wise to travel alone. Many of these death happen when riders go that are not skilled or prepped for BC riding. A beacon only works when your with a partner has one and knows how to use it. The Wasatch are some of the most prone areas that slide in the world. I have not dug any snowpits this year in the BC yet, but I am willing to believe that the early snowpack and most recent have a solid weak layer in between. Wind loading as well as sun and exposure all play into what happens.


Offline schneitzeit

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Re: Dec 6-8th Atmospheric River Chase
« Reply #10 on: December 17, 2019, 10:41:33 PM »
Yup, he went into the BC alone and without BC gear and any experience. There is not much room for error, even when you are being considerate of avy conditions.

What is "BC"?
"I like the cold weather. It means you get work done." - Noam Chomsky

Offline Nashville_Wx

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Re: Dec 6-8th Atmospheric River Chase
« Reply #11 on: December 18, 2019, 12:29:14 AM »
What is "BC"?

Backcountry. Many resorts have BC access Gates that allow you out of the controlled area. At this point, you need backpack, shovel, probe, beacon and the understanding how to use it. Its a buddy system and you must count on the person next to you to save your life and or not cause a slide above you. A lot goes into navigating the BC, esp during mod.high risk periods.


Offline Thundersnow

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Re: Dec 6-8th Atmospheric River Chase
« Reply #12 on: December 18, 2019, 05:01:53 AM »
Ah- yeah, I don’t think any of us were up on the jargon. My best guess would have been “blizzard conditions.”
"To say you have no choice... is a failure of imagination."
                                                           - Jean Luc Picard

 

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