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December 2024


TriPol
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27 / 16 mostly cloudy a drone or two, off a low of 19.  Warmer/wetter the next 5 days.  Rain later Sun/Mon and Wed with another 050 - 1.00 for the area.  Trough comes in by the end of this week and much colder Saturday through about Christmas.   Rebound warmer to close the month overall.

 

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Records:
 

Highs:

EWR: 68 (2015)
NYC: 68 (2015)
LGA: 67 (2008)
JFK: 64 (2015)

 

Lows:

EWR: 12 (2005)
NYC: 8 (1874)
LGA: 15 (1962)
JFK: 15 (1962)

 

Historical:

1924 - The temperature at Helena, MT, plunged 79 degrees in 24 hours, and 88 degrees in 34 hours. The mercury plummeted from 63 above to 25 below zero. At Fairfield MT the temperature plunged 84 degrees in just 12 hours, from 63 at Noon to 21 below zero at midnight. (David Ludlum)

1987 - A powerful storm spread heavy snow from the Southern High Plains to the Middle Mississippi Valley, and produced severe thunderstorms in the Lower Mississippi Valley. During the evening a tornado hit West Memphis TN killing six persons and injuring two hundred others. The tornado left 1500 persons homeless, and left all of the residents of Crittendon County without electricity. Kansas City MO was blanketed with 10.8 inches of snow, a 24 hour record for December, and snowfall totals in the Oklahoma panhandle ranged up to 14 inches. Strong winds, gusting to 63 mph at Austin TX, ushered arctic cold into the Great Plains, and caused considerable blowing and drifting of snow. (Storm Data) (The National Weather Summary)

1988 - Blowing snow was reported in western Kansas, as snow and gusty winds plagued the Central Rockies and Central High Plains. Colorado Springs CO reported thirteen inches of snow. Low pressure in Wisconsin brought heavy snow to the Lake Superior snowbelt area, with 22 inches reported at Marquette MI. (Storm Data) (The National Weather Summary)

1989 - High winds and heavy snow prevailed from Montana to Colorado. Snowfall totals in Wyoming ranged up to 20 inches at Burgess Junction, leaving up to 48 inches on the ground in the northeast sections of the state. Wind gusts in Colorado reached 87 mph south of the town of Rollinsville. Strong northwesterly winds continued to produce heavy snow squalls in the Great Lakes Region. Totals in northeastern Lower Michigan ranged up to 29 inches at Hubbard Lake, with 28 inches reported at Posen. Two day totals in northeastern Wisconsin ranged up to thirty inches. (Storm Data) (The National Weather Summary)

2006 - The Hanukkah Eve Wind Storm of 2006 caused storm to hurricane-force wind gusts and heavy rainfall hit the Pacific Northwest and southern British Columbia. Damage estimates in Washington and Oregon totaled $220 million. Over 1.8 million residences and businesses without power. 18 people were killed, most of whom died of carbon monoxide poisoning in the days following the storm because of improper use of barbecue cookers and generators indoors.

2010 - A rare tornado struck the small town of Aumsville, Oregon, tearing roofs off buildings, hurling objects into vehicles and homes and uprooting trees. No one was injured but the destruction left behind was severe. The National Weather Service classified the tornado as an EF2 with wind speeds of 110-120 mph and they said the tornado's damage trail was five miles long and 150 yards wide. 50 houses in Aumsville and the surrounding county area were affected, with 10 of them being unsuitable for occupancy. (KATU)

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23 minutes ago, donsutherland1 said:

The week ahead. Some interior snowfalls, but no significant East Coast snowfalls from Washington to Boston are likely. The period will start off very mild but end with perhaps the coldest weather so far this season moving into the region.

image.thumb.png.bc54df049a1841c1823cff8f28785a12.png

Yup, this weeks cold shot will probably be the coldest of the month 

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6 minutes ago, Allsnow said:

Yup, this weeks cold shot will probably be the coldest of the month 

The period 12/21 - 12/24 looks cold and like it could have negative departures -8 to -12 or more daily, more than yesterday and any of the opening 6 days this month which peaked at -10 in NYC and EWR.   

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30 minutes ago, Allsnow said:

Yup, this weeks cold shot will probably be the coldest of the month 

Looks like NYC finally has a shot at dropping under 20° this month.

 

Time Series Summary for NY CITY CENTRAL PARK, NY - Month of Dec
Click column heading to sort ascending, click again to sort descending.
2024 26 17
2023 25 0
2022 7 0
2021 25 0
2020 20 0
2019 16 0
2018 24 0
2017 9 0
2016 17 0
2015 34 0
2014 24 0
2013 19 0
2012 28 0
2011 22 0
2010 19 0

 

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40 minutes ago, SACRUS said:

 

Dep through the 14th

NYC: -3.6
LGA: -3.5
EWR: -2.2
JFK: -1.0

Most NYC Decembers that end up averaging more then 3 degrees below normal or under 36 degrees end up with at least 7 inches of snow BUT there are notable exceptions in recent memory 1989 and 1983.........which ended up with under 2 inches snow total for the month

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1 hour ago, bluewave said:

Back and forth pattern for the rest of the month with the dominant storm track through the Great Lakes. Warm up day 1-5 with a cooldown day 6-10. Then a warm up from around Christmas to the New Years.

 

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A brief warmup after Christmas and then right back to cold in January. 

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Noting weeklies recent trend showing cooling east coast through the end of the month and also seeing 5H blocking developing  eastern Canada.  Greenland is not the only places where blocking is more favorable for us.  

Added the 09z/ WSSI P for a moderate wintry impact event around 12/20-21.  Probably related to yesterdays EC OP, and I'll expect this to fade but not sure it will. It is a very low prob but developing high amplitude trough does offer the small opportunity. 

Screen Shot 2024-12-15 at 6.16.53 AM.png

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