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September 2014


Rtd208

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That first week of this month sealed the deal for an above normal month and it great skewed how the rest of the month has been. I was suprised to find that half the days this month were below normal with a couple of near normal days (0 to +1). and ultimately we will end up with half the days for month ending up below normal once you include today and a couple more days this week prior to the end of the month warmth.

Of course the warm departures were far more substantial despite an equal number of above and below normal days in September so the month will likely be +1 to +2.

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That first week of this month sealed the deal for an above normal month and it great skewed how the rest of the month has been. I was suprised to find that half the days this month were below normal with a couple of near normal days (0 to +1). and ultimately we will end up with half the days for month ending up below normal once you include today and a couple more days this week prior to the end of the month warmth.

Of course the warm departures were far more substantial despite an equal number of above and below normal days in September so the month will likely be +1 to +2.

 

It's not just the duration of the departures, but how extreme they are as well. People tend to focus on how many days are + or - but how big those positive or negative departures were is just as important.

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It's not just the duration of the departures, but how extreme they are as well. People tend to focus on how many days are + or - but how big those positive or negative departures were is just as important.

Only 4 days of -5 or greater. Even today will probably end up around -4 or -5 at the most. Meanwhile by the weekend we could see a few departures of +10

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On track for the 11th month in a row at Central Park with temperature departures below +2.

 

10-13...+3.3

11-13....-2.5

12-13...+1.0

1-14......-4.0

2-14......-3.7

3-14......-4.8

4-14......-0.7

5-14.....+1.6

6-14.....+1.0

7-14......-0.4

8-14......-0.7

9-14.....+1.1 so far

the average temperature should end up around 69.5 which is above normal...1980-2009 average is 68.4...2010-2013 is 69.5...1870-2009 is 67.8...

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69.5 would only be +1.5 for September which would be in line with the cooler pattern this year.

 

 

Sep

75.2

60.8

68.0

60.8 (1871)

73.5 (1961)

that's a so called smoothed normals...the 1981-2010 30 year average was 68.4...69.5 is +1.1 above average...I rather use the exact averages...

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More of the same easterly flow pattern since the beginning of August today.


 


 


Here's the days at LGA since 8-1:


 


8-1...SSE


8-2...ENE


8-3...ENE


8-4...SSE


8-10.SE


8-11.SE


8-12.SE


8-13.SE


8-19.ENE


8-20.SE


8-22.SE


8-23.ENE


8-24.ENE


8-25.ENE


8-26.SSE


8-27.SSE


8-29.SE


8-30.SE


9-5..SSE


9-7..NE


9-8..E


9-9..NE


9-10.NE


9-12.ENE


9-13.E


9-14.NE


9-18.NE


9-19.NE


9-20.SE


9-24.NE

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More of the same easterly flow pattern since the beginning of August today.

 

 

Here's the days at LGA since 8-1:

 

8-1...SSE

8-2...ENE

8-3...ENE

8-4...SSE

8-10.SE

8-11.SE

8-12.SE

8-13.SE

8-19.ENE

8-20.SE

8-22.SE

8-23.ENE

8-24.ENE

8-25.ENE

8-26.SSE

8-27.SSE

8-29.SE

8-30.SE

9-5..SSE

9-7..NE

9-8..E

9-9..NE

9-10.NE

9-12.ENE

9-13.E

9-14.NE

9-18.NE

9-19.NE

9-20.SE

9-24.NE

 

Would this be related to the +NAO of late summer? Past analogs?

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Would this be related to the +NAO of late summer? Past analogs?

 

It's mostly that the blocking has been focused to our NE south of Greenland promoting easterly flow here.

This week the easterly flow continues as the blocking shifts south but remains focused to our N and NE.

 

 

 

 

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The 12z gfs LR turns us from late August to November. I know it's BS but that's one of the most impressive CONUS wide cold shots I've seen on the gfs in the LR this early in the season.

Yeah that's pretty cold.

It was pointed out in the NE thread by will that nino winters can feature some good cold in October

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Enjoy summer for the next several days....an incredible stretch of gorgeous weather until further notice

If summer equated to the weather over the next several days you would not once hear me complain during the months of June, July and August.

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Enjoy summer for the next several days....an incredible stretch of gorgeous weather until further notice

Yep...gonna soak it in. It's what we mainly had this past August only with shorter day light hours these days. But there is one fly in the ointment, have to watch out for the chance of late night and morning fog.

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Basically its San Diego weather

Yep, I'm from San Diego and that has got to be one of the most boring climates on the planet. Low clouds and fog in the morning, clearning afternoon, high of 72, day after day. Nice but boring. A high in the 50s and a rainstorm are a big deal there.

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