Snow levels to hit 1000 feet on back end of storm SAT afternoon .... if you have moisture ... expect 1/2-3 inches snow to fall but not stick on the coast & thru the NV border.
Today: Partly sunny, with a high near 34. West wind between 5 and 15 mph, with gusts as high as 20 mph.
Tonight: Mostly cloudy, with a low around 15. Southwest wind around 15 mph.
Thursday: A 40 percent chance of snow. Mostly cloudy, with a high near 30. South wind around 15 mph, with gusts as high as 30 mph. New snow accumulation of less than a half inch possible.
Thursday Night: Snow likely. Cloudy, with a low around 14. Breezy, with a southwest wind between 15 and 20 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.
Friday: Snow. High near 22. Breezy, with a southwest wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New snow accumulation of 6 to 10 inches possible.
Friday Night: Snow showers. Low around 6. Breezy. Chance of precipitation is 80%. New snow accumulation of 5 to 9 inches possible.
Saturday: Snow showers likely. Mostly cloudy, with a high near 16. Chance of precipitation is 70%. Little or no snow accumulation expected.
Saturday Night: A slight chance of snow showers. Mostly cloudy, with a low around -3.
Sunday: Partly sunny, with a high near 30.
Sunday Night: Partly cloudy, with a low around 12.
Monday: Sunny, with a high near 30.
Monday Night: Partly cloudy, with a low around 11.
[B]
www.mammothweather.com[/B]
Arctic Born Storm to test forecasters abilities along the coastal sections of the Bay Area northward as Snow Levels may drop below 1000 feet Friday…..Up in the Sierra, this will be a powder event with very cold temps Friday night into Saturday.
Wednesday February 23, 2011
Posted at 9:24 am by Howard
Sierra Forcasters will have a somewhat easier time with the forecasts the next few days as the precipitation that falls over the Mono County Area Friday and Saturday will certainly be all snow! Questions still remain about how much snow will fall as the system itself is currently pretty dry but will pick up moisture as it develops off shore. The QPF from California Rivers Forecast Center paints about an inch and a half over the crest by Saturday AM, giving the upper elevations a good 2 to 3 feet. This is considering the cold nature of the storm and the potential ratio of snow to water….. 20:1 to 25:1. The big question remains about the possibility that this system may tap some deeper moisture from the central pacific Friday that would help boost QPF totals….hence this is still a very much developing storm that may prove to be a bigger precip producer for the high country than what the models are currently showing. Of course, if it does tap central pacific moisture, that may moisten the system up a bit with the ratios not quite as high as we currently expect.
What We Know:
1. A very deep upper low will form off the coast of Vancouver by Thursday Night
2. This upper trof will then sag southward just off the coast of the Columbia River by early Thursday and continue to shift southward down the west coast through Saturday Morning. Deep layered onshore flow will exist in the mid and lower levels for a prolonged period of time….. and so what we will experience is really one big ocean type Lake Effect into the sierra beginning Thursday night into Friday afternoon. If the central pacific moisture gets tapped, that would be the bonus. So again….A combination of onshore flow, UVM, orographics and strong upper jet dynamics will keep this a major storm to contend with. At the moment, a good 2 to 3 feet of snow is certainly possible by Saturday morning. Will update on the estimated amount of snowfall Thursday morning.
3. The other big issue here is the Arctic air dropping in over California from the north instead of back dooring us from the northeast. The new 12z WRF has -18C over Mammoth Mountain at 10,000 feet Saturday mid morning. That is -4 F. and temps in the town of Mammoth will probable be in the low single digits Saturday morning. Any wind at all will create a significant wind chill factor Saturday. Up slope conditions may develop Saturday afternoon into the evening.
4. The best part of this storm is that it is pure Western Canadian Born. In perspective, it is rare that Mammoth gets the potential for large amounts of snow at ratios of 20:1 to 25:1. Saturday for those that want to experience deep cold dry powder will want to have the right warmth for the elements. And to experience the possibility, of true Canadian type powder!
Dr Howard and the Dweebs……………………….
For Mammoth 1-2 feet of fluffy powder
Today: Partly sunny, with a high near 34. West wind between 5 and 15 mph, with gusts as high as 20 mph.
Tonight: Mostly cloudy, with a low around 15. Southwest wind around 15 mph.
Thursday: A 40 percent chance of snow. Mostly cloudy, with a high near 30. South wind around 15 mph, with gusts as high as 30 mph. New snow accumulation of less than a half inch possible.
Thursday Night: Snow likely. Cloudy, with a low around 14. Breezy, with a southwest wind between 15 and 20 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.
Friday: Snow. High near 22. Breezy, with a southwest wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New snow accumulation of 6 to 10 inches possible.
Friday Night: Snow showers. Low around 6. Breezy. Chance of precipitation is 80%. New snow accumulation of 5 to 9 inches possible.
Saturday: Snow showers likely. Mostly cloudy, with a high near 16. Chance of precipitation is 70%. Little or no snow accumulation expected.
Saturday Night: A slight chance of snow showers. Mostly cloudy, with a low around -3.
Sunday: Partly sunny, with a high near 30.
Sunday Night: Partly cloudy, with a low around 12.
Monday: Sunny, with a high near 30.
Monday Night: Partly cloudy, with a low around 11.
[B]
www.mammothweather.com[/B]
Arctic Born Storm to test forecasters abilities along the coastal sections of the Bay Area northward as Snow Levels may drop below 1000 feet Friday…..Up in the Sierra, this will be a powder event with very cold temps Friday night into Saturday.
Wednesday February 23, 2011
Posted at 9:24 am by Howard
Sierra Forcasters will have a somewhat easier time with the forecasts the next few days as the precipitation that falls over the Mono County Area Friday and Saturday will certainly be all snow! Questions still remain about how much snow will fall as the system itself is currently pretty dry but will pick up moisture as it develops off shore. The QPF from California Rivers Forecast Center paints about an inch and a half over the crest by Saturday AM, giving the upper elevations a good 2 to 3 feet. This is considering the cold nature of the storm and the potential ratio of snow to water….. 20:1 to 25:1. The big question remains about the possibility that this system may tap some deeper moisture from the central pacific Friday that would help boost QPF totals….hence this is still a very much developing storm that may prove to be a bigger precip producer for the high country than what the models are currently showing. Of course, if it does tap central pacific moisture, that may moisten the system up a bit with the ratios not quite as high as we currently expect.
What We Know:
1. A very deep upper low will form off the coast of Vancouver by Thursday Night
2. This upper trof will then sag southward just off the coast of the Columbia River by early Thursday and continue to shift southward down the west coast through Saturday Morning. Deep layered onshore flow will exist in the mid and lower levels for a prolonged period of time….. and so what we will experience is really one big ocean type Lake Effect into the sierra beginning Thursday night into Friday afternoon. If the central pacific moisture gets tapped, that would be the bonus. So again….A combination of onshore flow, UVM, orographics and strong upper jet dynamics will keep this a major storm to contend with. At the moment, a good 2 to 3 feet of snow is certainly possible by Saturday morning. Will update on the estimated amount of snowfall Thursday morning.
3. The other big issue here is the Arctic air dropping in over California from the north instead of back dooring us from the northeast. The new 12z WRF has -18C over Mammoth Mountain at 10,000 feet Saturday mid morning. That is -4 F. and temps in the town of Mammoth will probable be in the low single digits Saturday morning. Any wind at all will create a significant wind chill factor Saturday. Up slope conditions may develop Saturday afternoon into the evening.
4. The best part of this storm is that it is pure Western Canadian Born. In perspective, it is rare that Mammoth gets the potential for large amounts of snow at ratios of 20:1 to 25:1. Saturday for those that want to experience deep cold dry powder will want to have the right warmth for the elements. And to experience the possibility, of true Canadian type powder!
Dr Howard and the Dweebs……………………….
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