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October 2021


Stormlover74
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At or very close to our warmest fall on record so far. 
 

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 Sep 1 to Oct 18
Missing Count
1 2021-10-18 70.4 0
2 2005-10-18 69.6 0
- 1961-10-18 69.6 0
3 2017-10-18 69.1 0
4 1959-10-18 69.0 0
5 2007-10-18 68.8 0
6 1990-10-18 68.7 0
7 2018-10-18 68.5 0
- 1971-10-18 68.5 0
8 2011-10-18 68.0 0
- 1973-10-18 68.0 0
9 1983-10-18 67.9 0
10 2016-10-18 67.8 0
- 2015-10-18 67.8 0
- 1968-10-18 67.8 0


 

Time Series Summary for LAGUARDIA AIRPORT, NY
Click column heading to sort ascending, click again to sort descending.
Rank
Ending Date
Mean Avg Temperature Sep 1 to Oct 18
Missing Count
1 2007-10-18 71.2 0
- 2005-10-18 71.2 0
2 2021-10-18 70.7 0
3 2018-10-18 70.2 0
4 2016-10-18 70.0 0
5 2017-10-18 69.9 0
6 1959-10-18 69.8 0
7 1961-10-18 69.2 0
8 1990-10-18 69.0 0
9 2015-10-18 68.6 0
- 1941-10-18 68.6 0
10 2019-10-18 68.4 0


 

Time Series Summary for JFK INTERNATIONAL AIRPORT, NY
Click column heading to sort ascending, click again to sort descending.
Rank
Ending Date
Mean Avg Temperature Sep 1 to Oct 18
Missing Count
1 1971-10-18 68.9 0
2 2021-10-18 68.7 0
- 1961-10-18 68.7 0
- 1959-10-18 68.7 0
3 2017-10-18 68.6 0
- 2005-10-18 68.6 0
4 1983-10-18 68.4 0
5 2018-10-18 68.1 0
6 2015-10-18 67.9 0
7 2007-10-18 67.7 0
8 2016-10-18 67.2 0
9 2014-10-18 67.0 0
- 2011-10-18 67.0 0
- 1990-10-18 67.0 0
10 1970-10-18 66.8 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 Sep 1 to Oct 18
Missing Count
1 2021-10-18 67.4 0
2 2005-10-18 67.3 0
3 2017-10-18 67.1 0
4 2018-10-18 67.0 0
5 1990-10-18 66.4 0
6 2011-10-18 66.1 0
7 1980-10-18 66.0 0
8 2007-10-18 65.8 0
9 2015-10-18 65.5 0
10 1983-10-18 65.4 0


 

Time Series Summary for IGOR I SIKORSKY MEMORIAL AIRPORT, CT
Click column heading to sort ascending, click again to sort descending.
Rank
Ending Date
Mean Avg Temperature Sep 1 to Oct 18
Missing Count
1 2021-10-18 67.4 0
2 2017-10-18 67.2 0
3 2005-10-18 67.0 0
4 2018-10-18 66.9 0
5 2011-10-18 66.8 0
6 2016-10-18 66.6 0
7 1959-10-18 66.3 0
8 2007-10-18 66.1 0
- 1961-10-18 66.1 0
9 1971-10-18 65.9 0
10 2015-10-18 65.8 0
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23 minutes ago, psv88 said:

So after our one day “cool down” we are back to 75 mid week. 

If the right conditions are in place this winter the current warmth could add fuel to the fire. SSTs are at record highs. 

After Dec 2015's insane warmth we got the Jan blizzard. 

Big IF though and we'll need plenty of blocking.

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52 minutes ago, bluewave said:

At or very close to our warmest fall on record so far. 
 

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 Sep 1 to Oct 18
Missing Count
1 2021-10-18 70.4 0
2 2005-10-18 69.6 0
- 1961-10-18 69.6 0
3 2017-10-18 69.1 0
4 1959-10-18 69.0 0
5 2007-10-18 68.8 0
6 1990-10-18 68.7 0
7 2018-10-18 68.5 0
- 1971-10-18 68.5 0
8 2011-10-18 68.0 0
- 1973-10-18 68.0 0
9 1983-10-18 67.9 0
10 2016-10-18 67.8 0
- 2015-10-18 67.8 0
- 1968-10-18 67.8 0


 

Time Series Summary for LAGUARDIA AIRPORT, NY
Click column heading to sort ascending, click again to sort descending.
Rank
Ending Date
Mean Avg Temperature Sep 1 to Oct 18
Missing Count
1 2007-10-18 71.2 0
- 2005-10-18 71.2 0
2 2021-10-18 70.7 0
3 2018-10-18 70.2 0
4 2016-10-18 70.0 0
5 2017-10-18 69.9 0
6 1959-10-18 69.8 0
7 1961-10-18 69.2 0
8 1990-10-18 69.0 0
9 2015-10-18 68.6 0
- 1941-10-18 68.6 0
10 2019-10-18 68.4 0


 

Time Series Summary for JFK INTERNATIONAL AIRPORT, NY
Click column heading to sort ascending, click again to sort descending.
Rank
Ending Date
Mean Avg Temperature Sep 1 to Oct 18
Missing Count
1 1971-10-18 68.9 0
2 2021-10-18 68.7 0
- 1961-10-18 68.7 0
- 1959-10-18 68.7 0
3 2017-10-18 68.6 0
- 2005-10-18 68.6 0
4 1983-10-18 68.4 0
5 2018-10-18 68.1 0
6 2015-10-18 67.9 0
7 2007-10-18 67.7 0
8 2016-10-18 67.2 0
9 2014-10-18 67.0 0
- 2011-10-18 67.0 0
- 1990-10-18 67.0 0
10 1970-10-18 66.8 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 Sep 1 to Oct 18
Missing Count
1 2021-10-18 67.4 0
2 2005-10-18 67.3 0
3 2017-10-18 67.1 0
4 2018-10-18 67.0 0
5 1990-10-18 66.4 0
6 2011-10-18 66.1 0
7 1980-10-18 66.0 0
8 2007-10-18 65.8 0
9 2015-10-18 65.5 0
10 1983-10-18 65.4 0


 

Time Series Summary for IGOR I SIKORSKY MEMORIAL AIRPORT, CT
Click column heading to sort ascending, click again to sort descending.
Rank
Ending Date
Mean Avg Temperature Sep 1 to Oct 18
Missing Count
1 2021-10-18 67.4 0
2 2017-10-18 67.2 0
3 2005-10-18 67.0 0
4 2018-10-18 66.9 0
5 2011-10-18 66.8 0
6 2016-10-18 66.6 0
7 1959-10-18 66.3 0
8 2007-10-18 66.1 0
- 1961-10-18 66.1 0
9 1971-10-18 65.9 0
10 2015-10-18 65.8 0

If November is also a warmer than normal month, that should seal it as a 1st or 2nd warmest met fall ever. September was also way above normal

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Through October 18, Central Park has had a mean temperature of 64.6° (11th warmest). However, October 2021 would rank among the top 3 warmest starts to October without Central Park's trees issue.

https://www.americanwx.com/bb/topic/55633-october-2021/?do=findComment&comment=6145116

Using the regression equation noted in the linked post, the figure would be approximately 67.4° (3rd warmest) without the trees issue. Using the shorter 1948-2021 period, which reflects the period of record for numerous local stations, it would rank 2nd. A ranking of 3rd would be in line with what has occurred around the region.

Regional Ranking for Select Stations Record Length of 50 Years or More) and start of record:

Albany: 4th (1874)
Bridgeport: 5th (1948)
Islip: 3rd (1963)
New Brunswick: Tied 6th (1893)
New Haven: 1st (1948)
New York City-JFK: 4th (1948)
New York City-LGA: 5th (1939)
Newark: 2nd (1931)
Philadelphia: Tied 5th (1873)
Poughkeepsie: 2nd (1931)
White Plains: 6th (1948)

The biggest issue concerns artificially low maximum temperatures. The October 1-18 average high temperature at Central Park has been 70.3°. That is lower than the averages at both JFK Airport and LaGuardia Airport. In addition, on 16 of the 18 days (89%), Central Park registered the lowest maximum temperature or was tied with the lowest maximum temperature.

In sum, the neglect of the trees issue at Central Park is impairing the integrity of the climate record when the trees are leafed out.

 

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32 minutes ago, MJO812 said:

Cold and snowy but long range forecasts are moot.

Consensus is for a cold November but I hope we don't waste it.

I’m starting to very seriously doubt a cold November, in fact I think it’s another warmer than normal month. We have a strengthening, coupled La Niña in place and I don’t see any reason for the -PNA/+EPO/-PDO/-PMM/+SOI to let up. Even if a -NAO/-AO was to develop with a PAC like that, all it would do is trap the junk maritime Pacific air flooding into Canada. We would need a large scale full pattern change in the PAC and I just don’t see it happening by next month, it’s a stagnant pattern there

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1 minute ago, snowman19 said:

I’m starting to very seriously doubt a cold November, in fact I think it’s another warmer than normal month. We have a strengthening, coupled La Niña in place and I don’t see any reason for the -PNA/+EPO/-PDO/-PMM to let up. Even if a -NAO/-AO was to develop with a PAC like that, all it would do is trap the junk maritime Pacific air flooding into Canada. We would need a large scale full pattern change in the PAC and I just don’t see it happening by next month, it’s a stagnant pattern there

I'd actually root for that.  Save the cold pattern (if it develops) for Dec/Jan

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11 minutes ago, Brian5671 said:

I'd actually root for that.  Save the cold pattern (if it develops) for Dec/Jan

Maybe it changes for December, but I don’t see anything to support a large scale pattern change in the PAC by November. The PAC, as is, definitely does not support any sustained cold, it’s been the same stagnant pattern there since the beginning of September 

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36 minutes ago, snowman19 said:

If November is also a warmer than normal month, that should seal it as a 1st or 2nd warmest met fall ever. September was also way above normal

While it’s outside the weeklies best range, they do start November warmer than average in the Northeast. 

01C641F2-FFA8-4331-BDFD-B1DED888678F.thumb.png.37c75e753b20824f2d6fb4eff352f987.png

 

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2 hours ago, snowman19 said:

I’m starting to very seriously doubt a cold November, in fact I think it’s another warmer than normal month. We have a strengthening, coupled La Niña in place and I don’t see any reason for the -PNA/+EPO/-PDO/-PMM/+SOI to let up. Even if a -NAO/-AO was to develop with a PAC like that, all it would do is trap the junk maritime Pacific air flooding into Canada. We would need a large scale full pattern change in the PAC and I just don’t see it happening by next month, it’s a stagnant pattern there

It will get cold if the MJO travels into the favorable phases.

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1 hour ago, bluewave said:

You know the Pacific Jet is on steroids when we get a record October low around 955-960 mb  west of Washington and Oregon. 

3D73D205-21DE-4A18-9FA3-66BF2AB76A4C.png.fe96e03a7d6056d8cd0b71f59a7daf64.png


B6AE7406-F4E3-4C52-AFDF-E91EB5563F41.thumb.png.e033209df09699f27edf37668866f406.png

they need the snow and cold a lot more than we do, they need to build up the snow pack out west, let's hope it gets down to Flagstaff and Tahoe, etc.

 

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10 minutes ago, LibertyBell said:

they need the snow and cold a lot more than we do, they need to build up the snow pack out west, let's hope it gets down to Flagstaff and Tahoe, etc.

 

Yeah, that raging Pacific Jet will bring plenty of moisture to the West Coast in late October.

 

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19 minutes ago, SnoSki14 said:

A warm fall Oct/Nov guarantees a warm winter. 

We have to accept that winters will be warm from now on but that's doesn't mean we can't get a lot of snow still.

October-November had mean temperatures of a half standard deviation or more above normal as recently as 2014 and a very cold winter (2014-15) followed.

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