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October 2020 General Discussions & Observations Thread


uofmiami
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The last 3 days of October are averaging 47degs.         Making it 44degs., or about -9.0.

There may be 3 to 6 daily low readings in the 30's prior to these being neutralized by a string of 60 degree highs, Nov. 05-12.

Month to date is  59.4[+2.0].     October should end near 58.0[+1.1].

57*(82%RH) here at 6am, street wet.   

Zeta remnants:    About 2.0"-2.3" for the three main models.      Low T's the next 7 days are EURO 31*, CMC 31*, GFS 35*.

Tropics:   34.7N  86.3W-weakening in Alabama 

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Morning thoughts...

Tropical Storm Zeta will race northeastward and then east-northeastward toward the Middle Atlantic region before moving off the Delmarva Peninsula or perhaps New Jersey coast out into the Atlantic Ocean this evening. It will be increasingly windy with periods of heavy rain. A general 1”-3” rainfall is likely. The temperature will gradually fall from its 7 AM figures. 7 AM temperatures around the region included:

New York City (Central Park): 53°

Newark: 53°

Philadelphia: 53°

Tonight into tomorrow, portions of northern Pennsylvania, central New York State extending down into parts of the Hudson Valley, and central New England could see some snow. Precipitation will end tomorrow and it will be blustery with readings likely staying in the 40s.

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If NYC can drop to 34° or lower before the end of October, then it would be the first  time since 2011.

..New York City...
   Central Park, NY
   Rain     Rain     Sunny    Ptcldy   Ptcldy   Ptcldy   Sunny
     /52    44/45    34/49    41/58    39/48    36/51    40/58
      /100  100/80    10/00    00/30    30/10    00/00    00/10
Time Series Summary for NY CITY CENTRAL PARK, NY - Month of Oct
Click column heading to sort ascending, click again to sort descending.
Year
Lowest Min Temperature 
Missing Count
2019 43 0
2018 38 0
2017 42 0
2016 38 0
2015 35 0
2014 42 0
2013 40 0
2012 38 0
2011 33 0

 

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1 hour ago, bluewave said:

If NYC can drop to 34° or lower before the end of October, then it would be the first  time since 2011.


..New York City...
   Central Park, NY
   Rain     Rain     Sunny    Ptcldy   Ptcldy   Ptcldy   Sunny
     /52    44/45    34/49    41/58    39/48    36/51    40/58
      /100  100/80    10/00    00/30    30/10    00/00    00/10
Time Series Summary for NY CITY CENTRAL PARK, NY - Month of Oct
Click column heading to sort ascending, click again to sort descending.
Year
Lowest Min Temperature 
Missing Count
2019 43 0
2018 38 0
2017 42 0
2016 38 0
2015 35 0
2014 42 0
2013 40 0
2012 38 0
2011 33 0

 

Looks like the cold coming Monday doesn't look like we'll get into the 20s anymore?  I've seen forecasted low temps coming up- more like low to mid 30s now?

 

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5 hours ago, LibertyBell said:

Looks like the cold coming Monday doesn't look like we'll get into the 20s anymore?  I've seen forecasted low temps coming up- more like low to mid 30s now?

 

Yeah, Saturday morning  may be our lowest temperature for a while. The early next week cool down not looking as impressive. Then we get a moderation in temperatures.

 

A26703CB-4D28-48F7-88CB-F44FFED24F36.thumb.png.f32e4f7c0f622a97fae93c7df56fc910.png

5A2D7855-CF97-4328-989B-5BA31A9C29E0.thumb.png.1cfa964ae1d6f2c2d270efbb2edb81bf.png


BA688C92-DEAE-4517-8A99-8CF9A9A2A9F4.thumb.png.2f9604683c4191a71f1a3b8ea0312f54.png

 

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GFS still going with 10 straight 60-Degree Days, some of them in the 70's, starting November 05.          JMA continues November disaster till the near the end of that month , so mid-November might not be the finish of the 60's.       Yet another TS might be here to interrupt the AN by the 13th.

Today just a disgusting rain with temps. in the low 50's all the way.      Now 53*(96%RH) at 5:30pm.      Finally got below 50......49*(95% RH) by 8pm.

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Tropical Storm Zeta has already brought a soaking rain to the region. Through 8 pm EDT, rainfall totals include:

Allentown: 1.20"
Baltimore: 2.16"
Bridgeport: 1.11"
Harrisburg: 1.07"
Islip: 1.14"
New York City: 1.41"
Newark: 1.47"
Philadelphia: 1.51"
Washington, DC: 2.18"

Zeta is racing east-northeastward at 55 mph and will be moving back over the Atlantic Ocean. As it heads out to sea, much colder air from eastern Canada will be drawn into its circulation. At the same time, another area of rain that stretches from eastern Missouri to western New York State will head toward the region.

As a result, at least some snowfall is likely in an area running from northern Pennsylvania, across central New York State down to parts of the Hudson Valley, and into central New England. Behind the storm, the coldest air of the season will briefly push into the region. The remainder of the region will see periods of rain well into tomorrow.

November will likely commence on a cool note with the first week winding up cooler than normal. A surge of cold air could move into the region early next week. A prolonged period of above normal temperatures could develop during the second week of November.

The ENSO Region 1+2 anomaly was -1.1°C and the Region 3.4 anomaly was -1.4°C for the week centered around October 21. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -0.87°C and the ENSO Region 3.4 anomaly has averaged -1.15°C. La Niña conditions will likely prevail at least into mid-winter.

The SOI was -13.93.

Today, the preliminary Arctic Oscillation (AO) figure was +1.828.

On October 28 the MJO was in Phase 6 at an amplitude of 1.266 (RMM). The October 27-adjusted amplitude was 1.628.

Since 1950, there have been five cases where a La Niña developed during June-July-August or afterward following an El Niño winter. 4/5 (80%) of those cases saw a predominant EPO+/AO+ winter pattern. The most recent such case was 2016-17. 9/10 (90%) of the La Niña winters that followed an El Niño winter featured a predominantly positive EPO. A predominant EPO+/AO+ pattern is likely for winter 2020-21. In response, it is likely that the Middle Atlantic and southern New England areas will see a warmer than normal winter with potentially below normal snowfall.

Based on sensitivity analysis applied to the latest guidance, there is an implied near 100% probability that New York City will have a warmer than normal October. October will likely finish with a mean temperature near 57.8°.

 

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Not sure if anyone noted the 8th Anniversary of Hurricane Sandy tonight.

My lights had been out here in Coney Island for two hours already by this time (10:15pm)with 64 hours to go.

I am in a high rise so I had no water to boot and was getting a lot exercise on my staircases.

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The last 2 days of October are averaging 43degs.      Making it 41degs., or -12.0.    GFS has 7 straight 60's starting about Nov. 04.       Now the 12Z GFS is back to a real bore fest of 10 straight 60's and no precipitation.

Month to date is  59.1[+1.9].        October should end at 57.9[+1.0].        

44*(94%RH) here at 6am.      41*(91%RH) by 8am, rain.      40*(93%RH) at 9am.      39* by 11am.      Back to 40* by Noon.    43*(73%RH) by 4pm.

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Interesting Monday Nov 2: Lots of wind... scattered gusts within 5 MPH of 50? Also scattered snow showers Monday night into early Tuesday with slight chance of a skiff of snow cover for a couple of spots of the I84 corridor high terrain?  Big trough aloft digging into the northeast Monday, departing Tuesday. 

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Morning thoughts...

At 7:15 AM, a cold rain was falling across parts of the region. In parts of northern Pennsylvania, northwestern New Jersey, central New York State and central New England, snow was falling. At Albany, it was 30° with light snow. Likely daytime high temperatures around the region include:

New York City (Central Park): 43°

Newark: 44°

Philadelphia: 46°

After a cold start, tomorrow will be fair and chilly.

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No surprise that we are seeing another very early season snow with the North American snow cover extent setting a new October record. This is our 5th snow event by mid-November since 2008. This includes the late October events in 2008 and 2011 along  with November 2012 and 2018. Let me know if I am missing one from the northern parts of our forum. My guess is that this is related to the steep October sea ice decline since 2007.

https://www.star.nesdis.noaa.gov/smcd/emb/snow/HTML/snow_extent_plots.html

515B6434-7EE1-49EB-A113-6E093F0A7983.png.8685b1b45778124de30e9aeaf8408bd3.png

 

 

 

 

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32 minutes ago, bluewave said:

No surprise that we are seeing another very early season snow with the North American snow cover extent setting a new October record. This is our 5th snow event by mid-November since 2008. This includes the late October events in 2008 and 2011 along  with November 2012 and 2018. Let me know if I am missing one from the northern parts of our forum. My guess is that this is related to the steep October sea ice decline since 2007.

This is certainly a repeating process the last few years,  and even going further back, as you mention.  Wonder if we transition back to a colder pattern after November 20th and repeat the last couple Decembers which featured colder weather, but also an abrupt change after December 20th to much warmer right in time for the holidays. 

Possibly the next increase in NA snow cover coincidences with increased ridging out West and a improved MJO progression.  

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11 hours ago, CIK62 said:

Not sure if anyone noted the 8th Anniversary of Hurricane Sandy tonight.

My lights had been out here in Coney Island for two hours already by this time (10:15pm)with 64 hours to go.

I am in a high rise so I had no water to boot and was getting a lot exercise on my staircases.

A little ironic remnants of a Tropical system here on the same day. Also yday a loose crane was spinning around in midtown sending chunks of metal to the street, reminds me of the damaged crane during Sandy.

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