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December 2024


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6 hours ago, MJO812 said:

Awesome 2 part storm

One day a winter storm warning and then a blizzard warning the day after. 

I actually don't remember the 2002 storm, guess I'm getting old. My daughter was 2 months old; 2003 I remember because they would not let us go home early from work even though the teachers and kids were leaving. I remember the supervisor chasing people to the parking lot. God, I'm so glad to be retired.

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2 hours ago, forkyfork said:

climate change isn't being expressed through a homogenous increase in temps globally it's being expressed through extremes that average out to that increase 

That would mean a lot of regions average below normal (especially if most of the US has been above average)?

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Despite sunshine, the temperature topped out at 34° in Central Park. The last time New York City saw a 34° or below high temperature was January 21st when the mercury peaked at 31°.

The current cold shot will be fairly shortlived. Milder air will return to the region to close the weekend. Temperatures could reach or exceed 50° in the northern Mid-Atlantic and southern New England areas by early next week.

In addition, rainfall will likely accompany the return of milder temperatures. Monday night thrugh Wednesday night looks particularly wet. Following the rainfall, it could turn briefly colder late in the week before milder air again returns.

The NAO fell to a preliminary -2.751 on September 24th (all-time September record: -2.371, September 12, 1971). That was the 9th lowest value on record. La Niña winters following September cases where the NAO fell to -1.900 or below featured a predominantly positive NAO. The most recent such winters were 2016-2017 and 2022-2023. The mean temperatures for those winters in New York City were 39.3° and 41.0° respectively. The 1991-2020 normal value is 36.2°. A warmer to much warmer than normal outcome is favored by the November run of the ECMWF for Winter 2024-2025.

The ENSO Region 1+2 anomaly was +0.3°C and the Region 3.4 anomaly was -0.3°C for the week centered around November 27. For the past six weeks, the ENSO Region 1+2 anomaly has averaged +0.07°C and the ENSO Region 3.4 anomaly has averaged -0.23°C. Neutral ENSO conditions may still evolve into a La Niña event during the winter. Uncertainty as to whether a La Niña will actually develop continues to increase. Currently, 47% of dynamical models and 22% of the statistical models forecast the development of a La Niña.

The SOI was +23.98 today.

The preliminary Arctic Oscillation (AO) was -0.167 today.

 

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30 minutes ago, Brian5671 said:

The weeklies have not been great the last 2-3 yrs-seems like they show a great pattern in the LR only for it to warm up as we draw closer...

Yes but there are signs of a better pattern come Christmas week and beyond. 

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Yes but there are signs of a better pattern come Christmas week and beyond. 

I want to believe, I really do but doesn’t everyone remember last year? Pattern flip after Christmas, then after New Years and then when it finally came it was not impressive and then it was back to the warmth.

Eventually I believe winter will return and this period will be just a bad memory.


.
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6 hours ago, Bxstormwatcher360 said:

Nothing doing but snow showers in Central pa,there is a clipper diving down but we prob wont get much out of it. Maybe a flurry later on tonight. Ill take mood flakes atp. :lol:

What time will it start?

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11 hours ago, wishcast_hater said:


I want to believe, I really do but doesn’t everyone remember last year? Pattern flip after Christmas, then after New Years and then when it finally came it was not impressive and then it was back to the warmth.

Eventually I believe winter will return and this period will be just a bad memory.


.

There were a lot of us who were not believers in late Dec and early Jan last year…

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32 / 14 mostly cloudy .  Wamup begings today.   Wetter Mon - Wed (PM)  0.75 - 1.50 for many.  Short 48 period of colder Thu - Fri before an overall near to warmer than normal period into and beyond mid month.  

 

vis_nj_anim.gif

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Cold period , should get near normal today

EWR: 


Dec 1:  39 / 24 (-10)
Dec 2:  42 / 25 (-8)
Dec 3:  44 / 32 (-3)
Dec 4: 42 / 24 (-8)
Dec 5: 41 / 31 (-5)
Dec 6:  37 / 30 (-7)
 

 

NYC:

DEC 1: 38 / 27 (-10)
DEC 2:  39 / 29 (-9)
DEC: 3 42 / 32  (-6)
Dec 4:  42 / 30 (-6)
Dec 5: 40 / 31  (-6)
Dec 6: 34 / 30 (-10)

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19 hours ago, forkyfork said:

climate change isn't being expressed through a homogenous increase in temps globally it's being expressed through extremes that average out to that increase 

That said, we’re better off using 10yr mean as opposed to 30 year climo in the seasonal and sub seasonal range

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Records:

Highs:

EWR:  76 (1998)
NYC: 75 (1998)
LGA: 75 (1998)
JFK: 75 (1998)


Lows:

EWR: 16 (1954)
NYC: 10 (1926)
LGA: 17 (1954)
JFK: 20 (1964)

Historical:

 

1740 - In early December two weeks of mild and rainy weather culminated in the worst flood in fifty years in the Lower Connecticut River Valley. The Merrimack River swelled to its highest level, and in Maine the raging waters swept away mills, carried off bridges, and ruined highways. (David Ludlum)

1935 - Severe flooding hit parts of the Houston, TX, area. Eight persons were killed as one hundred city blocks were inundated. Satsuma reported 16.49 inches of rain. The Buffalo and White Oak Bayous crested on the 9th. (6th-8th) (The Weather Channel)

1987 - Heavy rain fell across eastern Puerto Rico, with 19.41 inches reported at Las Piedras. Flooding caused five million dollars damage. Another in a series of storms hit the northwestern U.S., with wind gusts above 100 mph reported at Cape Blanco OR. While snow and gusty winds accompanied a cold front crossing the Rockies, strong westerly winds, gusting to 93 mph at Boulder CO, helped temperatures in western Kansas reach the 60s for the sixth day in a row. Freezing drizzle in northeastern slowed traffic to 5 mph on some roads in Morrow County. (The National Weather Summary) (Storm Data)

1988 - An outbreak of cold arctic air brought up to 18 inches of snow to the Colorado Rockies, with 14 inches at Boulder CO, and seven inches at Denver. Heavy snow blanketed New Mexico the following day, with 15 inches reported near Ruidoso. (Storm Data) (The National Weather Summary)

1989 - A storm moving out of the Central Rocky Mountain Region spread snow across Kansas and Oklahoma into Arkansas and Tennessee. Snowfall totals ranged up to 7.5 inches at Winfield KS. Freezing rain on trees and power lines cut off electricity to 24,000 homes in northeastern Arkansas, and 40,000 homes in the Nashville TN area were without electricity for several hours. (Storm Data) (The National Weather Summary)

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25 minutes ago, bluewave said:

The good news is that the rainfall is slowly starting to recover a bit after one of our driest falls which have left some reservoirs near record lows.

 

IMG_2226.thumb.png.5d23f868762d5391655a371b9c999b73.png

 

 

Yeah looks like a rainy few days possible, and Wednesday could be a solid soaking.  I'll take it.  People need to temper snow expectations until January.  Honestly the way things have gone recently, I'd always wager on more snow in March than December.

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10 minutes ago, brooklynwx99 said:

nah, Dec 2013 actually started and ended warm

I still think in the end the month probably averages above normal, down in the southern MA/SE/TN Valley though a few places could see their first below December since 2010 since the period from 12/8-12/10 and 12/15-22 won't be as relatively torchy vs normal there as it will be here and in SNE, I think a few might have been below in 2020 in 2017 but a few sites averaged barely above those 2.

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