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November 2019 General Discussions & Observations Thread


Rtd208
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25 minutes ago, EasternLI said:

+PMM take over at some point? If it does, this place will be buzzing. 

 

There was a post 3 months ago that indicated a very cold and stormy December based on the record positive PMM at that time. However. maybe the record + IOD is interfering some how to achieve that outcome next month, or simply the correlation may work, but occur later in December. Some some research   indicated increased odds of cold an enhanced sub tropical jet during December based on the +PMM association along with increased odds of phasing along the East Coast. Some of those things are already happening  if you look close enough. There are indications the STJ is picking up steam and there have been ample coastal storms this Fall season as well.    

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44 minutes ago, frd said:

 

There was a post 3 months ago that indicated a very cold and stormy December based on the record positive PMM at that time. However. maybe the record + IOD is interfering some how to achieve that outcome next month, or simply the correlation may work, but occur later in December. Some some research   indicated increased odds of cold an enhanced sub tropical jet during December based on the +PMM association along with increased odds of phasing along the East Coast. Some of those things are already happening  if you look close enough. There are indications the STJ is picking up steam and there have been ample coastal storms this Fall season as well.    

I will proceed with cautious optimism 

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Some signs the EPO dips to start December with a weak -NAO, would be nice if the GEFS were correct for a change. 

Pattern doesn't look torchy but it's gotta be better than this to produce.

Oh well, the next couple weeks should be mostly pleasant with maybe near 60 temps this Friday and then near Thanksgiving.

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3 minutes ago, SnoSki14 said:

Some signs the EPO dips to start December with a weak -NAO, would be nice if the GEFS were correct for a change. 

Pattern doesn't look torchy but it's gotta be better than this to produce.

Oh well, the next couple weeks should be mostly pleasant with maybe near 60 temps this Friday and then near Thanksgiving.

I will take that over waking up to IIRC, 14 degrees last Thanksgiving. I don't even think we got out of the 20s that day

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30 minutes ago, SnoSki14 said:

Some signs the EPO dips to start December with a weak -NAO, would be nice if the GEFS were correct for a change. 

Pattern doesn't look torchy but it's gotta be better than this to produce.

Oh well, the next couple weeks should be mostly pleasant with maybe near 60 temps this Friday and then near Thanksgiving.

All the models and ensembles show the blocking  pattern as we head towards the end of this month.

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17 minutes ago, Snow88 said:

I posted about the upcoming pattern and 2 people laughed. Are people just trolling or actually looking at the MJO, Indicies and the models ?

I think the snarky remarks are the result of what happened last year with the ensembles calling for a cold/snowy pattern only to go up in smoke as it drew closer. Word of advice Anthony, when it comes to LR forecasts always proceed with caution.

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14 minutes ago, NutleyBlizzard said:

I think the snarky remarks are the result of what happened last year with the ensembles calling for a cold/snowy pattern only to go up in smoke as it drew closer. Word of advice Anthony, when it comes to LR forecasts always proceed with caution.

Definitely

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7 minutes ago, SnoSki14 said:

Nice look to start December, maybe 2010-2011 esque with the -PNA and -NAO.

EPS/GEFS agree. Not particularly cold but could be good enough especially as we head deeper towards winter.

Yes I agree. Also the storm system this weekend as currently modeled would be snow for a good portion of our area even two weeks from now. good to have storms going underneath us. don't forget by the end of this month the normal 0C 850s are now in central New Jersey so we do not need Artic Air to snow here just need a system to get under us and the Nao should help

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2 minutes ago, binbisso said:

Yes I agree. Also the storm system this weekend as currently modeled would be snow for a good portion of our area even two weeks from now. good to have storms going underneath us. don't forget by the end of this month the normal 0C 850s are now in central New Jersey so we do not need Artic Air to snow here just need a system to get under us and the Nao should help

It's a nice sign that we keep seeing coastals even though  they arent snow. The pattern depicted by all the models including the ensembles show promise as we head into December.

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Through November 20, parts of the Northeast have seen above normal snowfall. Amounts include: Albany: 2.1" (0.6" above normal); Bangor: 2.7" (1.9" above normal); Binghamton: 4.0" (0.2" above normal); Buffalo: 12.6" (7.7" above normal); Burlington: 11.0" (8.3" above normal); and, Caribou: 14.7" (7.5" above normal).

For at least the next 7-10 days, accumulating snow in such cities as Newark, New York, and Philadelphia remains a low probability scenario.

The ENSO Region 1+2 anomaly was -0.6°C and the Region 3.4 anomaly was +0.8°C for the week centered around November 13. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -0.68°C and the ENSO Region 3.4 anomaly has averaged +0.63°C. These recent conditions are consistent with a weak El Niño. Nevertheless, a neutral ENSO remains the base case for Winter 2019-20.

The SOI was -19.79 today.

An SOI reading of -30 or below, as occurred on November 4-5, also occurred during three prior years in the November 1-10 timeframe. All three cases featured a warmer than normal December. The average temperature for those three cases was 2 degrees warmer than normal.

Today, the preliminary Arctic Oscillation (AO) figure was -2.096.

On November 19, the MJO was in Phase 8 at an amplitude of 1.440 (RMM). The November 18-adjusted amplitude was 1.772.

The recent MJO tendencies suggest that December could wind up at least somewhat warmer than normal overall. The MJO had spent three days in Phase 6 at an amplitude of 1.500 or above. Since 1974, five years saw the MJO in Phase 6 at an amplitude of 1.500 or higher for two or more days during the 1974-2018 period: 1985, 1987, 1996, 1998, and 2018. Only 1985 with a mean temperature of 34.2° was colder than normal during December.

It also spent three days in Phase 7 at an amplitude of 1.500 or above. All five years (1986, 1990, 1996, 1999, and 2016) that saw the MJO in Phase 7 at an amplitude of 1.500 or above during the November 10-20 period went on to record a warmer than normal December. The recent record cold outbreak (11/12-13) coincided closely with the timing of a similar magnitude Arctic outbreak in 1986 (11/13-14). The December 1986 mean temperature in New York City was 39.0°.

Since 1974, the MJO was in Phase 8 at an amplitude of 1.000 to 2.000 during the November 10-25 period on three or more days in eight years, as was the case this year. In 6/8 (75%) cases, the AO wound up averaging > 0 during December; in 5/8 (63%) it averaged +0.500 or above; and, in 4/8 (50%), it averaged +1.000 or above. In 2/8 (25%) cases, it averaged -2.000 or below (2005 and 2010). In 5/8 (63%) cases, December was warmer than normal in the New York City area. At present, there is considerable uncertainty concerning the Arctic Oscillation in the extended guidance.

Overall, the preponderance of data continues to imply a milder than normal December in the East. Should ENSO Region 3.4 continue to warm, the Indian Ocean Dipole persist, and the Arctic Oscillation trend toward neutral and later positive, the probability of such an outcome would increase. Should blocking persist, the amount of warming could be reduced. At present, there remains considerable uncertainty about the AO in the extended range. The EPS forecasts the AO's going weakly positive in early December. The GEFS suggests that blocking will persist into at least the first week of December.

Based on sensitivity analysis applied to the latest guidance, New York City has an implied 95% probability of experiencing a colder than normal November.

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Next 8 days are averaging 47.5degs., or about 4degs. AN 

Month to date is  -5.7[43.6].          Should be near  -3.1[44.7] by the 29th.

41* here at 6am.     47* by 11am.    49* at Noon.     51* at 1pm.     53* by 2:30pm.

The action on the Wed. before TGD seems to have faded.       Wind on Thursday could have been a problem for the parade balloons.      GFS has week frontal passage only.     CMC no action.       EURO somewhat like the GFS.

 

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Top 3 coldest first 20 days of November at several of our stations before the temperature moderation.

Time Series Summary for NEWARK LIBERTY INTL AP, NJ
Click column heading to sort ascending, click again to sort descending.
Rank
Ending Date
Mean Avg Temperature Nov 1 to Nov 20
Missing Count
1 1933-11-20 38.7 0
2 1976-11-20 40.5 0
3 2019-11-20 42.4 0
Time Series Summary for ISLIP-LI MACARTHUR AP, NY
Click column heading to sort ascending, click again to sort descending.
Rank
Ending Date
Mean Avg Temperature Nov 1 to Nov 20
Missing Count
1 1976-11-20 41.0 0
2 1967-11-20 41.2 0
3 2019-11-20 41.4 0
Time Series Summary for IGOR I SIKORSKY MEMORI AP, CT
Click column heading to sort ascending, click again to sort descending.
Rank
Ending Date
Mean Avg Temperature Nov 1 to Nov 20
Missing Count
1 1962-11-20 41.2 0
2 2019-11-20 42.0 0
3 1967-11-20 42.3 0

EC65EAE0-48E0-44A8-B659-C581EF794E38.thumb.png.f473d8f00408e2ba160b914c57f7d43c.png

6BBE9CBC-5DA9-4D51-81EB-C5797EE0B52D.thumb.png.40c8c981c8364666c363204c941869f7.png

 

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A Reminder:  That visible tonight from about 11:30pm to 12:15am (if sky is clear, which seems dubious according to the models) is a quick-but supposedly spectacular meteor shower.     It should emanate from near Orion in the lower se. sky.

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