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December 2016 Discussion & Observations


bluewave

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Interesting to see the block near Alaska form right over the record area of open water for so late in the season where the sea ice is well below normal.

So maybe this block that is driving the cold pattern coming up is getting a low sea ice boost like we saw with the record Kara block near the end of last

December. The SST's to the west of Alaska are also showing much warmer than normal.

 

N_daily_extent_hires.png

 

eps_z500a_5d_nh_41.png

 

globe_oisst_anom_20161201.png

 

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2 hours ago, bluewave said:

Interesting to see the block near Alaska form right over the record area of open water for so late in the season where the sea ice is well below normal.

So maybe this block that is driving the cold pattern coming up is getting a low sea ice boost like we saw with the record Kara block near the end of last

December. The SST's to the west of Alaska are also showing much warmer than normal.

 

N_daily_extent_hires.png

 

eps_z500a_5d_nh_41.png

 

globe_oisst_anom_20161201.png

 

 

By the time this pattern relaxes ,  we will look back at this period  ( which will extend to Christmas) , (  there's another shot coming around the back on the 20th  ) , we will refer to this as one of the better early season cold and snowy starts to a winter .

 

There will be multiple chances to snow over the next 20 days. 

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1 hour ago, PB GFI said:

 

By the time this pattern relaxes ,  we will look back at this period  ( which will extend to Christmas) , (  there's another shot coming around the back on the 20th  ) , we will refer to this as one of the better early season cold and snowy starts to a winter .

 

There will be multiple chances to snow over the next 20 days. 

I'll take one good chance around the 23rd-24th....I like what I'm seeing but it's only model mania at the moment...

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3 minutes ago, Allsnow said:

Both the nam and gfs has light snow Monday morning. Looks like a decent chance at a coating to inch north and west. City has surface temps in the upper 30's 

I would watch that secondary low for Tuesday night into Wednesday it definitely has more potential. - and as you know models always have a warmer core in there so as the low redevelops it could give us a burst of heavy wet snow Monday afternoon after the light stuff is out. Evaporative cooling would come into play if you will. Definitely winter is here so enjoy and happy tracking

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greatest December cold and snowy periods since 1945 in NYC...all had an average temperature 32.0 or lower and at least 10" of snowfall...will 2016 make the list?...


15 day period...year...temp/max/min/precip/snow/big snow/max snow dept.
Dec. 10-24........1945..23.7..45..10..1.27"..12.2"...8.3".....9"

Dec23-Jan.6.1947-48..29.7..37..18..4.55"..32.1"..26.4"...26"

 

Dec 14-28.........1948..30.8..51..10..2.70"..21.3"..16.0"...16"

Dec 11-25.........1960..25.8..49....8..2.50"..16.6"..15.2"...15"

 

Dec 11-25.........1963..27.0..39..11..1.19"..10.3"....6.6"....7"

Dec 9-23...........1995..28.9..44..15..1.77"..11.5"....7.7"....7"

Dec22-Jan5.....00-01..25.2..34..14..1.12"..14.6"..12.0"..12"

Dec19-Jan2.....09-10..31.9..55..16..3.07"..12.6"..10.9"..11"

Dec 14-28........2010..29.3..40..19..1.62"..20.1"..20.0"..20"

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10 hours ago, bluewave said:

Interesting to see the block near Alaska form right over the record area of open water for so late in the season where the sea ice is well below normal.

So maybe this block that is driving the cold pattern coming up is getting a low sea ice boost like we saw with the record Kara block near the end of last

December. The SST's to the west of Alaska are also showing much warmer than normal.

 

N_daily_extent_hires.png

 

eps_z500a_5d_nh_41.png

 

globe_oisst_anom_20161201.png

 

Isn't it insane how one single incident (insane + anomalies over the Arctic) can cause this chain of close-to-unprecedented events?  We are kind of in some uncharted territory here going forward I would gather.  My understanding of how the models work is that the incorporate a lot of historical data/analogs to make forecasts - no analog of this.

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1 hour ago, UlsterCountySnowZ said:

Boy that EPS run was pretty, fridged cold, many snow opportunities 

 

suprising amount of Ens show significant snowfalls for much of area

 

That was kind of a weenie run. Many more individual members getting decent snows into the region than previous runs.

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32 minutes ago, pazzo83 said:

Upton isn't very bullish on the storm this week as of yet for the city.  They have us staying at 40 or above for the duration.

Sunday night our surface temps might hurt the coast. Might be wet flakes or a very cold rain. North and west looks good for 1-2 

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Heat still appears to be on via the CFS Weeklies around the 18th. and into the new year by several days at least.    Everyday it shows the same thing would tend to increase chance it is onto something, unfortunately.    Perhaps the storm will act like a Klingon disrupter weapon and send a reflection back 5,000 miles to the Pacific.   LOL.

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11 minutes ago, CIK62 said:

Heat still appears to be on via the CFS Weeklies around the 18th. and into the new year by several days at least.    Everyday it shows the same thing would tend to increase chance it is onto something, unfortunately.    Perhaps the storm will act like a Klingon disrupter weapon and send a reflection back 5,000 miles to the Pacific.   LOL.

CFS your favorite model?

:)

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