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April 2016 discussion/obs


WeatherFeen2000

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I'm really curious how much precipitation (rain and water equivalent) we received in the winters of 1998-99 and 2001-02.

 

They left 01-12 off the list by mistake. It was the second driest winter on record for NYC.

So the summer of 99 and the winter of 01-02 were the last two top ten driest seasons

for NYC. That was our last actual drought here when we hit D3 and the NYC reservoirs

reached warning levels.

 

Here is the monthly precipitation list:

 

http://www.weather.gov/media/okx/Climate/CentralPark/monthlyannualprecip.pdf

 

 

 

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They left 01-12 off the list by mistake. It was the second driest winter on record for NYC.

So the summer of 99 and the winter of 01-02 were the last two top ten driest seasons

for NYC. That was our last actual drought here when we hit D3 and the NYC reservoirs

reached warning levels.

Here is the monthly precipitation list:

http://www.weather.gov/media/okx/Climate/CentralPark/monthlyannualprecip.pdf

20020416_northeast_trd.png

Many thanks Bluewave, Donation, and others. I greatly appreciate your responses.
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The big story is that the strong high latitude blocking patterns this month have kept any major April warmth here subdued. The early heat in March may have given the impression that we would be pushing 90 degrees here

in April like many of the years up to 2012.

 

 

NYC April highs

 

2016...82 so far

2015...80

2014...77

2013...82

2012...88

2011...83

2010...92

2009...92

2008...84

2007...86

2006...83

2005...87

2004...85

2003...88

2002...96

2001...87

2000...75

 

 

It's a different weather world now when a +10, that we had yesterday, is considered normal and not hot.

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It's a different weather world now when a +10, that we had yesterday, is considered normal and not hot.

 

Yeah, post 2000 April heat really doesn't get impressive until you reach the upper 80's or the few occasions with 90's.

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The remaining negative departures could be wiped off by the weekend. Whether we get warm sectored or not next week will determine if we finish AN or not. 

 

If we finish AN with all this blocking in place, then just imagine what it's going to be like when that blocking goes away. The frying could begin as early as May. 

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Today makes 6 straight days where relative humidity has dropped into the teens during the afternoon.

 

NYC just dipped into the single digits. This may be a first for late April with such low RH.

 

CENTRAL PARK SUNNY 66 9 10

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Humidity is down to 9.7% in the park.

When was the last time our humidity was in the single digits?

 

Several houses went on fire in Copiague today which jumped a canal and turned into a large brush fire.

The plume was so large from all the brush burning on Indian Island that it showed up on the radar.

 

http://www.newsday.com/long-island/suffolk/copiague-fire-burns-homes-spreads-to-indian-island-1.11713065

 

 

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Single digit humidity around here is a pretty astounding feat. What exactly has been the atmospheric mechanism for this dryness? Given the amount of soil moisture we usually have in the northeast, you wouldn't think such low humidity was possible.

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"Cold" months now are near normal to slightly below.

Huh? February 2015 was one of the coldest months in NYC history at -11.4F, just slightly less impressive than January 1977 and February 1934. Jan-Mar 2015 averaged nearly 7F below normal. November was also below normal three seasons in a row, from Nov 2012 (which featured a major early season snowstorm) through Nov 2014. March was also below normal from 2013 to 2015.

It is true, however, that very few months with cold anomalies have occurred in the warm season since the record-breaking chill of Summer 2009. This, though, is luck: climate models actually show the colder months warming faster than the summer in the long run due to additive albedo and radiative effects. So you can't sustain a substantive argument based on any of the points you have made or implied.

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