Jump to content
  • Member Statistics

    17,606
    Total Members
    7,904
    Most Online
    ArlyDude
    Newest Member
    ArlyDude
    Joined

September 2020 wx discussion


forkyfork
 Share

Recommended Posts

55 minutes ago, dmillz25 said:

Lets hope we see this in December and not the opposite 

We’ll see if we can get some early hints from the MJO in October. The 18-19 and 19-20 below normal snowfall La Niña background state winters featured the October MJO convection focused in the Indian Ocean. Our snowier 16-17 and 17-18 La Niña winters  had the October MJO in the Maritime Continent phases. 
 

69EADBDF-8D5F-40EA-B35C-2D8B9A833379.png.313a487394ba6b2123ba9c5c0f82bd9d.png

45E842E3-22DE-4A65-B8D3-8BE9F1DFBC30.png.38ef447cbe71ac5e579ed9d22e1eb50d.png


 


 


 


 

 

  • Like 2
Link to comment
Share on other sites

58/33 from a low of 40.4 (no frost).  36 more hours of this very cool airmass before moderation on Tue.  Much warmer Wed - Fri (low 80s in the warmer spots).  Flow may go predominantly more southerly later next weekend into next week (9/27). Deep trough into the GL, MW, MV and swinging through the southeast and east coast towards the beginning of next month but moderated airmass wont be nearly as cool as this for next 2 weeks. 

  • Like 1
Link to comment
Share on other sites

Summer freezes? 
from Rutgers weather station 

 

Summer freezes are uncommon but not unprecedented at some NJ locations.  Today marks the second consecutive day with low temperatures at or below freezing at several Rutgers NJ Weather Network stations.  Yesterday, September 19, Walpack (Sussex County) fell to 29°, with Sandyston (Sussex) and Pequest (Warren) both down to 31°.  This morning, Walpack bottomed out at 31°, with Pequest and Basking Ridge (Somerset) each at 32°.  
Walpack was last down to freezing on June 1, leaving this cold-air drainage prone valley site in northwest Jersey with a short 109 day growing season (days between last spring and first fall freeze).  Meanwhile, several coastal stations had their last freeze on March 1, thus have had a 203 day growing season....and counting.

  • Like 5
  • Thanks 1
Link to comment
Share on other sites

22 minutes ago, bluewave said:

We’ll see if we can get some early hints from the MJO in October. The 18-19 and 19-20 below normal snowfall La Niña background state winters featured the October MJO convection focused in the Indian Ocean. Our snowier 16-17 and 17-18 La Niña winters  had the October MJO in the Maritime Continent phases. 
 

69EADBDF-8D5F-40EA-B35C-2D8B9A833379.png.313a487394ba6b2123ba9c5c0f82bd9d.png

45E842E3-22DE-4A65-B8D3-8BE9F1DFBC30.png.38ef447cbe71ac5e579ed9d22e1eb50d.png


 


 


 


 

 

Currently the convection isn’t where you want it if you want a snowy Niña 

  • Like 2
  • Haha 1
Link to comment
Share on other sites

4 minutes ago, snowman19 said:

No, it’s definitely not and the ongoing huge wildfires out west aren’t what you want either. They are altering the stratosphere in a way that supports +AO

The two biggest factors for nyc winters are the PV and tropical forcing. We really won’t know what they will look like until December IMO.

  • Like 2
Link to comment
Share on other sites

13 minutes ago, Allsnow said:

Summer freezes? 
from Rutgers weather station 

 

Summer freezes are uncommon but not unprecedented at some NJ locations.  Today marks the second consecutive day with low temperatures at or below freezing at several Rutgers NJ Weather Network stations.  Yesterday, September 19, Walpack (Sussex County) fell to 29°, with Sandyston (Sussex) and Pequest (Warren) both down to 31°.  This morning, Walpack bottomed out at 31°, with Pequest and Basking Ridge (Somerset) each at 32°.  
Walpack was last down to freezing on June 1, leaving this cold-air drainage prone valley site in northwest Jersey with a short 109 day growing season (days between last spring and first fall freeze).  Meanwhile, several coastal stations had their last freeze on March 1, thus have had a 203 day growing season....and counting.

 

June 1st was only down to 46 here.  Dont recall that but interesting.

  • Like 2
Link to comment
Share on other sites

4 minutes ago, Allsnow said:

The two biggest factors for nyc winters are the PV and tropical forcing. We really won’t know what they will look like until December IMO.

Can’t disagree with that. I do think we will absolutely need the NAO to cooperate this winter. I have a feeling the AO and the PAC side are going to be hostile. You can already see signs of a firehose PAC jet again and we are already dealing with La Niña/-PDO

  • Haha 1
Link to comment
Share on other sites

7 minutes ago, snowman19 said:

Can’t disagree with that. I do think we will absolutely need the NAO to cooperate this winter. I have a feeling the AO and the PAC side are going to be hostile. You can already see signs of a firehose PAC jet again and we are already dealing with La Niña/-PDO

I wouldn’t expect nao help until it’s 3 days out lol. We haven’t had a -nao in DJF in years. Anybody that says they know one is coming can also sell you a bridge in Brooklyn. 

  • Like 2
  • Haha 1
  • Weenie 1
Link to comment
Share on other sites

1 hour ago, Allsnow said:

Currently the convection isn’t where you want it if you want a snowy Niña 

We would need to see all that IO forcing shift east toward the Maritime Continent in October. The big amped up MJO 5 in October 2017 came before the snowy La Niña 17-18 winter.  The strong IO MJO 1 in October 2011 preceded the 11-12 La Niña winter. There is some research that early IO forcing can excite the PV like we saw last winter.

EEC8AFDB-E0FF-4AE0-BA5A-4CCC95F70FDB.gif.8fd1a72fb6dbd2d43245eb20dc365854.gif

86505864-68D1-4396-A79E-798FE79D7951.gif.c7c03a75665f8b705cb9a479e5abe126.gif

F58504C6-81F4-4FEA-B85E-18A9061A4710.gif.98b6d6f0a69e3085a169af4cad92a5f5.gif

2B2A1D39-F270-4E8C-98D7-FEB8301134C8.gif.69a2fa8a1ffd1829df048fcbd9bfe01b.gif

  • Like 3
  • Weenie 1
Link to comment
Share on other sites

1 hour ago, Allsnow said:

Summer freezes? 
from Rutgers weather station 

 

Summer freezes are uncommon but not unprecedented at some NJ locations.  Today marks the second consecutive day with low temperatures at or below freezing at several Rutgers NJ Weather Network stations.  Yesterday, September 19, Walpack (Sussex County) fell to 29°, with Sandyston (Sussex) and Pequest (Warren) both down to 31°.  This morning, Walpack bottomed out at 31°, with Pequest and Basking Ridge (Somerset) each at 32°.  
Walpack was last down to freezing on June 1, leaving this cold-air drainage prone valley site in northwest Jersey with a short 109 day growing season (days between last spring and first fall freeze).  Meanwhile, several coastal stations had their last freeze on March 1, thus have had a 203 day growing season....and counting.

Our growing season now averages around 220 days.

Hence the Crepe Myrtle you now see quite often on Long Island.

  • Like 1
Link to comment
Share on other sites

52 minutes ago, snowman19 said:

Can’t disagree with that. I do think we will absolutely need the NAO to cooperate this winter. I have a feeling the AO and the PAC side are going to be hostile. You can already see signs of a firehose PAC jet again and we are already dealing with La Niña/-PDO

My over/under for snowfall for NYC this winter is 15 inches.  I dont think we'll see single digits like last season but I dont think we'll get to average either.

 

Link to comment
Share on other sites

1 hour ago, SACRUS said:

Look to go 16 days between measurable precip (as it looks now) Sep 10 - Sep 25/6.  We'll see if the rains can get up here next weekend or is it more towards the 28th/29th.

It will probably be closer to the end of the month.  Whats the record for most days between measurable precip.?

I recall long dry periods happen quite often when there is a lot of action in the tropics that doesn't make landfall- 1995 had this in August and we had widespread wildfires that month.

 

 

 

Link to comment
Share on other sites

11 minutes ago, bluewave said:

The strong IO MJO 1 in October 2011 preceded the 11-12 La Niña winter. There is some research that early IO forcing can excite the PV like we saw last winter.

Any comment  regarding the IOD being totally opposite last year ?  Long range models seem to indicate it goes more so negative as the year ends. Nothing like last year with the extreme positive values in December and continuing into Jan. 

 

 

Link to comment
Share on other sites

On 9/18/2020 at 12:10 PM, SnoSki14 said:

It's complicated and Teddy's evolution will play a role in the future pattern.

Looks like it'll cause the NAO to go negative.

To me it still looks like 80 degrees next weekend. The warm pattern that starts wednesday and goes through next weekend might come to an end a little earlier now though, with that trough swinging in during the early part of the week of the 28th. Hopefully we'll get some decent rain from that too, after this long dry stretch.

  • Like 1
Link to comment
Share on other sites

42 minutes ago, winterwx21 said:

To me it still looks like 80 degrees next weekend. The warm pattern that starts wednesday and goes through next weekend might come to an end a little earlier now though, with that trough swinging in during the early part of the week of the 28th. Hopefully we'll get some decent rain from that too, after this long dry stretch.

One things for sure. We won't see weather this cool again til at least the 2nd week of October 

Link to comment
Share on other sites

2 hours ago, frd said:

Any comment  regarding the IOD being totally opposite last year ?  Long range models seem to indicate it goes more so negative as the year ends. Nothing like last year with the extreme positive values in December and continuing into Jan. 

 

 

The relationship that I have been looking at is the October MJO before a La Niña or Niña-like winter. October forcing over the Indian Ocean like last year was followed by less snowfall in NYC. The La Niña winters since 2000 with forcing near the Maritime Continent had better snowfall outcomes  for NYC. 

October composite for a NYC 27.6”to 61.9”seasonal snowfall

9FCDA088-7998-49CC-B408-2E442D8FA8D0.png.67c59761361bc6e23697adc2850ee9ca.png
 

October composite before a NYC 4.8”to 20.5”snowfall season

 

4C386C2F-C9C9-4AB4-BDEE-FE6F2BC7018F.png.71f7d1f6d86840b15d32b1979d0f656b.png

 

 


 

 

  • Thanks 2
  • Weenie 1
Link to comment
Share on other sites

1 hour ago, Stormlover74 said:

One things for sure. We won't see weather this cool again til at least the 2nd week of October 

No question about that. The cooldown for early the week of the 28th doesn't look nearly as cool as what we have right now, and the long range stuff is indicating another warmup in early October. We're gonna be in a mild to warm pattern for quite awhile after tomorrow.

  • Like 1
Link to comment
Share on other sites

Looks like smoke is coming back into the NYC forum... Not as thick for the next couple of days but probably a bit noticeable. HRRRX attached predictions for 8PM tonight, 8AM Monday and 8AM Tuesday.  

You can see it on the visible images over the midwest...but the initial revisit of smoke aloft arrives from southeast Canada tonight, then the midwest pall during mid week after theTeddy passage. 

 

Screen Shot 2020-09-20 at 3.10.54 PM.png

Screen_Shot_2020-09-20_at_3_10.04_PM.png

Screen Shot 2020-09-20 at 3.09.00 PM.png

  • Like 1
Link to comment
Share on other sites

57 minutes ago, SnoSki14 said:

Models pretty consistent on another big ridge forming out west. Trough axis should be to our west though so could see some heavy rains around that time. 

Perfect time for a homegrown storm too but we never seem to get that on cue.

This would be a good time for something to happen 

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...