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November 2022


Stormlover74
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Too bad none of these overamped day 7-10 OP runs have had any ensemble support. The 12z OP Euro is the latest example today. The other day it was the GFS and GEM. That’s why ensemble means are the way to go beyond the 120 hr forecast. The record -EPO looks too progressive for a big wrapped up benchmark track. But maybe even the coast can get a few mood flakes as the waves scoot by to our east as colder air gets drawn further east.

Overamped OP run

DF6259C1-434F-4DCD-866A-B07D7C387C6C.thumb.png.d82233781e505f30ef09e27bd1b6738f.png

Ensemble mean more progressive weaker wave with maybe some mood flakes

 

5C4C481E-CF07-44C5-B912-4EAA9D0E9DD8.thumb.png.89c97d67d130416b6d6e4950b5cae5eb.png

 

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Overnight, a much colder air mass began moving into the region. Now, a prolonged period of below normal temperatures lies ahead.

Minimum temperatures will dip into the 30s for the first time this season tomorrow morning at LaGuardia Airport (will be the 5th latest first occurrence) and Central Park (will be the 2nd latest first occurrence). Highs will recover to no higher than the upper 40s and perhaps lower 50s through the week.

In addition, a storm will likely bring a cold rain to the region Tuesday night into Wednesday. A few interior sections could briefly see some frozen precipitation. An accumulating snowfall is likely across parts of upstate New York and northern New England.

Beyond mid-month, Atlantic blocking could develop. Early indications suggest that the blocking won't be strong (with the AO staying mainly above -1.000). Its duration remains uncertain.

The ENSO Region 1+2 anomaly was -1.8°C and the Region 3.4 anomaly was -1.1°C for the week centered around November 2. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -1.71°C and the ENSO Region 3.4 anomaly has averaged -0.90°C. La Niña conditions will likely persist into the winter.

The SOI was -7.89 today.

The preliminary Arctic Oscillation (AO) was +0.406 today.

On November 11 the MJO was in Phase 1 at an amplitude of 0.721 (RMM). The November 10-adjusted amplitude was 0.857 (RMM).

Based on sensitivity analysis applied to the latest guidance, there is an implied 70% probability that New York City will have a warmer than normal November (1991-2020 normal). November will likely finish with a mean temperature near 49.8° (1.8° above normal).

 

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15 hours ago, bluewave said:

LGA had their greatest snowstorm only a few weeks after their latest first freeze in January 2016. 
 

Frost/Freeze Summary for LAGUARDIA AIRPORT, NY
Each section contains date and year of occurrence, value on that date.
Click column heading to sort ascending, click again to sort descending.
Year
Last
Value
First
Value
Season Length
2015 03-29 (2015) 27 01-04 (2016) 15 280
2001 03-28 (2001) 31 12-23 (2001) 32 269
1998 03-22 (1998) 31 12-22 (1998) 24 274
2021 04-02 (2021) 29 12-19 (2021) 31 260
2011 03-29 (2011) 32 12-11 (2011) 31 256
1948 04-10 (1948) 32 12-11 (1948) 32 244

Maximum 2-Day Total Snowfall 
for LAGUARDIA AIRPORT, NY
Click column heading to sort ascending, click again to sort descending.
Rank
Value
Ending Date
Missing Days
1 28.2 2016-01-24 0
2 27.9 2016-01-23 0
3 25.4 2006-02-12 0
4 23.8 1996-01-08 0
5 23.3 2006-02-13 0
6 22.8 1947-12-27 0
7 22.2 1947-12-26 0
8 22.0 1983-02-12 0

So did JFK!

 

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18 hours ago, tdp146 said:

https://www.weather.gov/media/okx/FrostFreeze/OKX_Frost_Freeze_22_handout.pdf
 

they were extending the dates of the frost/freeze program. Here is a map of the extended dates. The city and southern Nassau have the same dates as coastal Virginia. 

Yes our climo is like Norfolk now.

 

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11 hours ago, bluewave said:

Too bad none of these overamped day 7-10 OP runs have had any ensemble support. The 12z OP Euro is the latest example today. The other day it was the GFS and GEM. That’s why ensemble means are the way to go beyond the 120 hr forecast. The record -EPO looks too progressive for a big wrapped up benchmark track. But maybe even the coast can get a few mood flakes as the waves scoot by to our east as colder air gets drawn further east.

Overamped OP run

DF6259C1-434F-4DCD-866A-B07D7C387C6C.thumb.png.d82233781e505f30ef09e27bd1b6738f.png

Ensemble mean more progressive weaker wave with maybe some mood flakes

 

5C4C481E-CF07-44C5-B912-4EAA9D0E9DD8.thumb.png.89c97d67d130416b6d6e4950b5cae5eb.png

 

NE already has a thread for it

 

 

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Morning thoughts…

It will be partly to mostly sunny and very cool today. High temperatures will reach the upper 40s and perhaps lower 50s in most of the region. Likely high temperatures around the region include:

New York City (Central Park): 46°

Newark: 49°

Philadelphia: 48°

Colder than normal temperatures will last through the week.

Normals:

New York City: 30-Year: 54.5°; 15-Year: 54.6°

Newark: 30-Year: 55.5°; 15-Year: 55.7°

Philadelphia: 30-Year: 56.4°; 15-Year: 56.4°

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1 hour ago, donsutherland1 said:

Morning thoughts…

It will be partly to mostly sunny and very cool today. High temperatures will reach the upper 40s and perhaps lower 50s in most of the region. Likely high temperatures around the region include:

New York City (Central Park): 46°

Newark: 49°

Philadelphia: 48°

Colder than normal temperatures will last through the week.

Normals:

New York City: 30-Year: 54.5°; 15-Year: 54.6°

Newark: 30-Year: 55.5°; 15-Year: 55.7°

Philadelphia: 30-Year: 56.4°; 15-Year: 56.4°

Mid 30s for lows this morning everywhere, Don?

 

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