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Vendor, Blog and TV Channel Forecasts Thread


earthlight

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Great video by Meteorologist Bobby Martrich ( EPAWA Weather ). He expects the EPO to go negative by mid December and the pattern change by then due to the SOI tanking just like what JB is predicting.

https://www.youtube.com/watch?v=fTy5Wbabqck#t=31

Just like last season, I feel mets are rushing the change. It could just as easily be delayed until mid to late January.

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It's clear as day. He is dead set on riding the cold and snowy train like Casey Jones this winter

You mean the same way some were pushing an EAST based NINO this year ?

jk.

Lets tally the charlatans work up , he had a great winter last year and was spot on with the westward migration on this years BASIN WIDE nino .

Yeh , I think I would pay attention this time around .

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It's clear as day. He is dead set on riding the cold and snowy train like Casey Jones this winter

Big changes in the Pacific can sometimes be a precursor to larger-scale hemispheric pattern changes. In 2-3 weeks, my guess is that we'll see some better indications as to whether a pattern change is likely. The very strong polar vortex responsible for the current AO+ regime won't fall apart quickly. It may decay over time with some fleeting negative values occurring after mid-month, but any prolonged blocking probably won't occur until January. The current vortex is not as strong as that which developed in late November-early December 2006, but it is impressive.

 

One thing to watch for is the return of EPO- values. Currently, the EPO is forecast to go positive and then stay mainly positive through mid-December. A return of significant negative values would provide a good indication that a colder pattern could develop. With a predominantly PNA+ pattern, the EPO- could be enough to bring about the cold.

 

Also, the warmest ENSO anomalies should drift westward with time if some of the guidance is correct. That kind of forcing could also increase prospects of a pattern change.

 

If everything comes together, AO-, EPO-, PNA+ and the anticipated shift in ENSO warm anomalies, along with a gradually weakening El Niño event, mid-January and February might have a lot of winter potential. The January 15-February 4, 1966 timeframe featured an AO-/PNA+/EPO- combination. It was colder than normal and 14.7" snow fell in NYC. Even more snow fell elsewhere in the Mid-Atlantic region. Philadelphia received 20.4" and Washington, DC picked up 23.0". There's still no assurance that everything will come together, but it can't be ruled out just yet.

 

For January, an AO-/PNA+ pattern is the most favorable one for significant snowstorms for the New York City area. Since 1950, 65% of snowstorms that dumped 6" or more snow in NYC occurred when the AO was negative and the PNA was positive. All of January's 10" or greater snowstorms occurred when the AO was negative and the PNA was positive.

 

Right now, we're waiting for the first pattern change. And, even if it unfolds toward the close of the month or early January, it might be transient. That would not necessarily mean that a more wintry pattern couldn't lock in afterward.

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the pna plays a big roll for NYC snowstorms...reds are plus ao/nao/-pna...The blizzard in Dec. 1960, the blizzard in Feb. 1978, February 1983, January 1996 were all in the black...

.AO/PNA/NAO/Enso at the time...
snowstorm...date......AO......PNA......NAO......Enso/MEI....

12" 03/18/1956....0.470....0.186.....-0.225.....La Nina
12" 03/20/1958...-2.522....0.067.....-0.830.....El Nino
14" 12/21/1959....1.266....0.114......1.032.....Neutral-
15" 03/03/1960...-1.265...-0.834......0.249.....Neutral-
15" 12/11/1960...-0.343....1.527.....-0.316.....Neutral-
10" 01/19/1961...-1.506....1.587......0.392.....Neutral-
18" 02/03/1961....0.621....0.489.....-0.126.....Neutral-
13" 01/12/1964....0.385....0.654.....-1.180.....Weak El Nino
15" 02/06/1967....1.180....0.732......0.230.....Weak La Nina
15" 02/09/1969...-3.114...-0.325......0.044.....Weak El Nino
14" 01/19/1978...-0.347....0.262......0.230.....Weak El Nino
18" 02/06/1978...-3.014....1.188.....-0.093.....Weak El Nino
13" 02/19/1979...-0.697...-0.042......0.254.....Neutral+
18" 02/11/1983...-1.806....0.845.....-0.567.....El Nino
10" 03/13/1993....0.764...-0.179......0.472.....Weak El Nino
13" 02/11/1994...-0.862...-0.454......0.927.....Neutral+
11" 02/04/1995....1.429....1.604......0.437.....El Nino
20" 01/08/1996...-1.200....0.447.....-0.392.....Weak La Nina
11" 02/16/1996....0.163...-0.421......0.534.....Weak La Nina
12" 12/30/2000...-2.354....1.075.....-0.537.....Weak La Nina
20" 02/16/2003....0.128....0.681......0.836.....El Nino
14" 12/05/2003....0.265....0.784.....-0.197.....Neutral+
10" 01/25/2004...-1.686....0.164.....-0.541.....Neutral+
14" 01/25/2005....0.356....1.098.....-0.035.....El Nino
27" 02/11/2006...-0.156....1.658......0.136.....Neutral-
11" 12/19/2009...-3.413....0.549.....-1.833.....El Nino
10" 02/09/2010...-4.266....0.622.....-1.136.....El Nino
21" 02/25/2010...-3.818....0.087.....-0.219.....El Nino
20" 12/26/2010...-2.631...-0.284.....-0.834.....La Nina
19" 01/26/2011...-1.683....1.233.....-0.142.....La Nina

11" 02/09/2013...-0.700....0.403......0.219.....neutral-

11" 01/21/2014...-1.843....1.172......0.137.....neutral-

12" 02/13/2014....0.182...-1.097......0.690.....neutral-

..............................................................................................................

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snowfall during el nino years or neutral positive years...Above average years, near average years and below average years...last year and 1992-93 are the only decent winters with the ao averaging on the plus side for all four months...If December is on the plus side it probably will be mild...if it turns negative in February like in 82-83 we could see a big storm along the coast...some of the bottom feeders had one good month or storm after January when the ao went negative......

el nino winters's AO monthly ave December to March...
year..........temp...snowfall.......Dec.......Jan.........Feb........Mar....... ave 2014-15...31.7....50.3"......+0.413...+1.092...+1.043...+1.837...+1.092.
2009-10...33.8....51.4".......-3.413... -2.587... -4.226... -0.432... -2.664
2004-05...35.4....41.0"......+1.230...+0.356... -1.271... -1.348... -0.258
2003-04...32.4....42.6"......+0.265... -1.686... -1.528...+0.318... -0.658
2002-03...31.2....49.3".......-1.592... -0.472...+0.128...+0.933... -0.251
1993-94...31.2....53.4".......-0.104... -0.288... -0.862...+1.881...+0.157
1977-78...30.3....50.7".......-0.240... -0.347... -3.014...+0.502... -0.800
1968-69...32.9....30.2".......-0.783... -2.967... -3.114... -1.582... -2.112
1963-64...33.3....44.7".......-1.178...+0.385... -0.575... -0.558... -0.482
1957-58...33.3....44.7"......+0.828... -1.438... -2.228... -2.522... -1.340.ten year average...-0.732
middle years................................................................................
1951-52...37.0....19.7"......+1.987...+0.368... -1.747... -1.859... -0.313
1965-66...35.9....21.4"......+0.163... -3.232... -1.438... -0.911... -1.357
1969-70...30.5....25.6".......-1.856... -2.412... -1.325... -2.084... -1.919
1976-77...28.5....24.5".......-2.074... -3.767... -2.010...+0.344... -1.877
1982-83...37.9....27.2"......+0.967...+1.359... -1.806... -0.567... -0.012
1986-87...34.8....23.1"......+0.060... -1.148... -1.473... -1.746... -1.077
1987-88...34.7....19.1".......-0.534...+0.265... -1.066... -0.197... -0.383
1990-91...39.2....24.9"......+1.277...+0.723... -0.876... -0.527...+0.149
1992-93...35.0....24.5"......+1.627...+3.495...+0.184...+0.764...+1.518...nine year average...-0.586
least snowy.......................................................................................
1952-53...38.1....15.1".......-1.827... -1.036... -0.249...+1.068... -0.511
1953-54...37.4....15.8"......+0.575... -0.148... -0.181...+0.246...+0.181
1958-59...30.9....13.0"...... -1.687... -2.013...+2.544...+1.442...+0.072
1972-73...35.8......2.8"......+1.238...+1.232...+0.786...+0.537...+0.948
1979-80...35.4....12.8"......+1.295... -2.066... -0.934... -1.433... -0.787
1991-92...37.2....12.6"......+1.613...+0.550...+1.222...+0.984...+1.067
1994-95...37.1....11.8"......+0.894... -0.154...+1.429...+0.393...+0.641
1997-98...39.6......5.5".......-0.071... -2.081... -0.183... -0.254... -0.647
2006-07...37.3....12.4"......+2.282...+2.034... -1.307...+1.182...+1.048..nine year average...+0.212

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the pna plays a big roll for NYC snowstorms...reds are plus ao/nao/-pna...The blizzard in Dec. 1960, the blizzard in Feb. 1978, February 1983, January 1996 were all in the black...

 

I agree about the PNA. It's very important, especially for January. Once one gets into the second half of February, the wavelengths are beginning to shorten and a PNA- becomes more favorable.

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