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December 2024


TriPol
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5 minutes ago, bluewave said:

Looks like the fast Pacific flow continues until further notice. Warm ups ahead of the Great Lakes lows and cool downs behind the storms. This could be a -1 to +1 month that doesn’t get decided + or - until New Year’s Eve.
 

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It might be a fast Pacific flow but the PNA will make it seasonable here.

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3 hours ago, MANDA said:

Just posting story link here since others have posted that they have seen the drones.  I've not seen any.

Interesting.  Seems far beyond just hobbyist drone flyers.  Not sure what is up with so many flying around.

Feel free to remove if too far off topic.

https://www.dailymail.co.uk/sciencetech/article-14181799/drones-new-jersey-state-emergency-ufo-ocean-sighting.html

 

Mebs!  They forgot to activate the cloaking device!!!

I live near the Trump golf course, so I got a little carried away-aliens in New Jersey and all that.   Apologies for the OT Coneheads reference, now back to the weather....

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1 hour ago, bluewave said:

Looks like the fast Pacific flow continues until further notice. Warm ups ahead of the Great Lakes lows and cool downs behind the storms. This could be a -1 to +1 month that doesn’t get decided + or - until New Year’s Eve.
 

IMG_2316.gif.c1ac234b2ee87a5fc1e3157545fdd4c8.gif

IMG_2317.gif.ddc77f8cc03ffb56b76b2ef8149b2eda.gif

 

Which is a win temp wise…but this pattern doesnt seem to support any snow

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In the wake of today's storm, it will turn briefly noticeably colder tomorrow through Saturday before milder air starts to return on Sunday. It could be unseasonably mild early next week.

Early indications are that Christmas and Hanukkah 2024 will feature warmer than normal conditions in the northern Mid-Atlantic and southern New England areas.

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 +0.1°C and the Region 3.4 anomaly was -0.3°C for the week centered around December 4. For the past six weeks, the ENSO Region 1+2 anomaly has averaged +0.12°C and the ENSO Region 3.4 anomaly has averaged -0.20°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 +1.87 today.

The preliminary Arctic Oscillation (AO) was -2.069 today.

Based on sensitivity analysis applied to the latest guidance, there is an implied 66% probability that New York City will have a colder than normal December (1991-2020 normal). December will likely finish with a mean temperature near 37.8° (1.3° below normal).

 

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13 hours ago, WX-PA said:

It might be a fast Pacific flow but the PNA will make it seasonable here.

It’s only seasonable since the new 30 year climate normals around NYC are close to 40° in December. Back in the old days seasonable was closer to the mid 30s. We used to get a really cold December around or below freezing once every 5 to 10 years . Now we will make it 14 years without a really cold December.

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1 hour ago, bluewave said:

It’s only seasonable since the new 30 year climate normals around NYC are close to 40° in December. Back in the old days seasonable was closer to the mid 30s. We used to get a really cold December around or below freezing once every 5 to 10 years . Now we will make it 14 years without a really cold December.

People forget how cold Decembers used to get. Even in the 2000s there were several days with highs stuck in the teens

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