Jump to content
  • Member Statistics

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

End of February/ Early March Discussion Thread 2015


Allsnow

Recommended Posts

I will not post the Euro day 11 -15 Euro ensembles as the one I get are from a pay site , I will only tell you , they could not look better .

 

-EPO

-AO

-NAO

+PNA

 

The heights are connected across the pole with the trough STUCK underneath in the east  . Whatever comes out of the N branch during the 20th  - 31st time frame will cut off and as JB say will use the warm air from the South to deepen .

 

We are not done .

 

This may be one of the strongest MJO transits from 7-8 that we have seen for March in a while.

So that matches the composites well with heights finally building across to Greenland. I will

give the weeklies points for at least getting the -EPO/+PNA and Eastern trough idea correct back

in February .Old man winter continues to hit the steroids this year.

 

Link to comment
Share on other sites

  • Replies 1.4k
  • Created
  • Last Reply

This may be one of the strongest MJO transits from 7-8 that we have seen in March in a while.

So that matches the composites well with heights finally building across to Greenland. I will

give the weeklies points for at least getting the -EPO/+PNA and Eastern trough idea correct back

in February .Old man winter continues to hit the steroids this year.

 

attachicon.gifECMF_phase_MANOM_51m_small.gif

^     Look at that amplitude . Yikes .

Link to comment
Share on other sites

I know. We have to research some amplitude records since that looks like a contender at least for March.

Amazing how every warm up has been muted that was seen in the LR .  We probably see 5 days of Normal and just reverse again .

Link to comment
Share on other sites

I know. We have to research some amplitude records since that looks like a contender at least for March.

I don't have access to those records hut I will tell you in classes that type of amplitude was definately pushing it on the high side.
Link to comment
Share on other sites

The Gfs just looks crazy but not in a crazy impossible kind of way.

Can you imagine if the low ends up further south and colder air bleeds in with that much moisture. The trend thus far has been further south so it's plausible especially with those massive highs surrounding us.

Current GFS still shows close to a foot NYC

Link to comment
Share on other sites

Amazing how every warm up has been muted that was seen in the LR .  We probably see 5 days of Normal and just reverse again .

 

 

I don't have access to those records hut I will tell you in classes that type of amplitude was definately pushing it on the high side.

 

 

It looks like this would be the strongest March MJO amplitude in phase 7 before going into 8 since 1997.

 

 

 

Link to comment
Share on other sites

The AO also just made an extreme move today. It just reached a very anomalous +5 reading

that may be the highest since 1993. I have to check the numbers to confirm this.

But a very steep drop is forecast as the models build the ridging across toward Greenland.

 

1993 1 14 5.245
1993 1 15 5.100

 

 

Link to comment
Share on other sites

How about today's AO it looks even greater than the 1993 stats. Amazing to go from a record breaking -AO to possibly a record breaking +AO in such a short amount of time.

 

Yeah, this is an extreme swing for March only two years after going below -5 in 2013.

 

Today was one of the most positive AO daily readings on record since 1950.

This looks very close to the record pending the CPC final numbers.

 

1989 1 14 5.582

1993 1 14 5.245

 

http://ftp.cpc.ncep.noaa.gov/cwlinks/norm.daily.ao.index.b500101.current.ascii

 

2013 3 19 -5.193

2013 3 20 -5.688

2013 3 21 -5.399

2013 3 22 -5.240

 

Link to comment
Share on other sites

One of the greatest AO plunges into negative territory that you are going to see from such a high level.

 

attachicon.gifao.sprd2.gif

+5 SD AO spikes followed by and 8 SD move to the downside , with a plus + 5 SD MJO phase 7 MJO pulse and multiple 20 +point SOI drops .

WARNING WARNING ........ 

Link to comment
Share on other sites

The GFS ensemble forecast for the AO is showing a drop rivaling or perhaps even surpassing that which took place in March 1956 (6.136 standard deviations between 3/2/1956 and 3/26/1956). Below is the ensemble forecast for the AO and also a comparison of 1956 with 2015 (the broken line would be the path 2015 would take if it were identical to what occurred in 1956 to better illustrate the magnitude of the drop being shown on the ensembles).

 

AO03092015.jpg

Link to comment
Share on other sites

+5 SD AO spikes followed by and 8 SD move to the downside , with a plus + 5 SD MJO phase 7 MJO pulse and multiple 20 +point SOI drops .

WARNING WARNING ........ 

 

We can also add the PDO to the extreme list with February marking the third consecutive record breaking high  month.

 

http://research.jisao.washington.edu/pdo/PDO.latest

 

2014** 0.30 0.38 0.97 1.13 1.80 0.82 0.70 0.67 1.08 1.49 1.72 2.51

2015** 2.45 2.30 

Link to comment
Share on other sites

 

Thru the first two weeks (3/14)

 

NYC: -2.8

EWR: -4.0

LGA: -2.9

JFK:  -3.6

PHL: -4.3

 

 

 

NYC last 20 March's temp dep (snowfall) and subsequent April

 

March /  April

1995: +2.4 (trace)     /     -1.1 (trace)

1996: -3.5 (13.2)      /  -0.8 (0.7)

1997: -0.6  (1.7)       / -1.3 (Trace)

1998: +2.9 (5.0)       / +1.0 (0.0)

1999:  +0.1  (4.5)     /  +0.5 (0.0)

2000:  +4.7  (0.4)     /  -2.0  (1.2)

2001: -2.8 (3.8 )      /   +0.9 (0.0)

2002: +1.7 (Trace)   / +3.1 (Trace)

2003: +0.6 (3.5)       /  -3.2  (4.1)

2004: +1.1 (4.8 )        /  +0.6 (0.0)

2005: -3.1 (6.9)         /    +2.1  (0.0)

2006: +0.6 (1.3)        /  +2.7  (0.1)

2007: -0.2 (6.01)       /  -2.7  (Trace)

2008: +0.2 (Trace)    /   +2.0 (0.0)

2009: +0.0 (8.3)        /  +1.5  (Trace)

2010: +5.7 (Trace)   /  +4.9  (Trace)

2011: -0.1 (1.0)        /  +1.3  (Trace)

2012: +8.5 (0.0)      /   +1.8 (0.0)

2013: -2.3 (7.3)      /  0.0  (0,0)

2014: -4.8 (0.1)     /  -0.7  (Trace)

 

 

Had in the wrong thread.

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.

×
×
  • Create New...