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April 2014 discussion


Mikehobbyst

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I think April will be 80 percent sh*t and very few nice days on the whole.  A ton of days in the 40's with rain, and a few 55-60 degree days with sun, but again very few based on negative NAO and cut-offs off the northeast coast quite frequently. The frigid ocean temps which will likely take to late May to warm up appreciably, will not help us at all.  I would say close the blinds until Mid May for spring weather this year.  As they say in the BK and in honor, "Forgetaboutit".  C to the O to the L to the D. Let's go .. B to the A to the C to the K to the D to the Double O to the R... Snow88 should be laughing right now in that tall tee that likely says, "Go Brooklyn"  :clap:

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April snowfalls one inch or more...

Biggest snowstorms...
10.2" 3-4th 1915
10.0" 13th 1875
9.6" 6th 1982
8.5" 1st 1924
6.5" 8-9th 1917
6.5" 5th 1944
6.4" 6-7th 1938
5.0" 9th 1907
4.2" 8th 1956
4.0" 7th 2003
3.3" 8-9th 1916
3.3" 5-6th 1896
3.0" 18th 1887
2.6" 11-13th 1918
2.5" 4th 1957
2.5" 4th 1870
2.5" 5th 1898
2.2" 9-10th 1942
2.0" 2nd 1871
1.9" 14th 1950
1.7" 12-13th 1940
1.2" 9th 2000
1.2" 2nd 1965
1.0" 12th 1894
1.0" 15th 1892
1.0" 4th 1886

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At least until 4/20 we suffer with cut-offs, stalled boundaries to our south and blocked up pattern in North Atlantic.  I think we slowly improve 4/20-4/30, and go back and forth 5/1-5/10 and start to get warm after that.  For above 60 F, four days and for above 70 F, two days around 4/23-4/26.  Very chilly and wet month ahead.  One of the worst 10 Aprils in the last 30 years I'd say is coming. The 6Z 3/29 GFS is virtually no sunshine except for Tuesday and Wednesday this upcoming week for the entire run.  Almost looks like a 4/1982 redux pattern in the middle of the run if it adjusts the jets and Arctic High pressure areas.  Are we going into the same type of pattern that 4/1982 had ?  This is the worst April model run I have seen in my life.  The 00Z 3/29 ECMWF and GGEM are just about the ugliest model runs you would ever see for our area.  Complete crap weather month en route.... Sorry.  Time to add the accompanying smell with that imaginary toilet flush sound I added earlier.  I see Arctic air taking over the middle portion of the month with night freezes and barely above freezing 35-40 highs taking over for a possible time around 4/10 to 4/18.  Looks serious and real for a very cold wet month.  There is no support for the contrary on the models.  Show me if you can find it.  Am I correct in what I am seeing, pro Met analysis added would be interesting on this.  Bud break on trees will happen around 5/5, latest probably on record, full leaf out by 5/15.  the late blooming trees will be fully leafed out by Flag Day.  We will likely run a 4-5 weeks late bud and leaf out.  Pattern and cold waters look extremely anomalous.

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NEG NAO, +SNFreak21  interestingly though from those maps looks in fact like central park at least may have gotten nothing.  N, S, E, and W of NYC but not Central Park itself, so unclew is probably right on, which I should have figured.  This was the storm that took Brookhaven's total for the year from the high 70s to over 90.  http://www.bnl.gov/weather/4cast/MonthlySnowfall.htm

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Latest CFS hinting at slightly below normal April temperatures here which would translate into

a lower chance for extended warmth. Probably some short warm intervals to remind you

that it's spring before we cool down again behind cold fronts and storms.

 

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Latest CFS hinting at slightly below normal April temperatures here which would translate into

a lower chance for extended warmth. It would probably translate into shorter intervals

here and there of warm temps before a front or storm cools things down again.

CFSv2.NaT2m.20140330.201404.gif

Hoping may will bring more long lived warmer temps. After this weekends deluge its looking like a pretty good rainy april. Still should be some nice warmups in between these rainstorms with spotty 60's in warm areas before the next front/ storm as you said makes their way into this area.
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Hoping may will bring more long lived warmer temps. After this weekends deluge its looking like a pretty good rainy april. Still should be some nice warmups in between these rainstorms with spotty 60's in warm areas before the next front/ storm as you said makes their way into this area.

 

The good news is that the average high reaches the mid 60's by later in the month so even some cooler days

will feel like spring by then.

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Unclew i remember a pretty big storm around April 9 1996 - widely varying amounts across LI but some big numbers out in central Suffolk north shore . Can't recall did NYC miss out on that ?

I had almost all snow with 1.30" of water equivalent but only a half inch of snow...It seemed like the snow that was falling disappeared into the ground...I lived in Brooklyn then but Staten Island had 4" and probably more in the hills...

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Looks like a relatively cooler, wetter first half of April at least. A bit of a -NAO this week and then some western ridging beyond that will generally be responsible for this as well as the still vast amount of cold air up north. There will be warmer days but those look to be fairly brief. 

 

Will be surprised if NYC doesn't see an April freeze but at the same time temperatures could still average below normal without a freeze occurring. In fact many times things warm up sharply before or after a freeze in April for NYC, but the pattern we're in is far more stable and skews towards cool (not cold) and wet. 

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12z ECMWF has rain from Thursday night through Saturday morning, but generally only light rain amounting to ~.50" The low cuts off too far NW for us.

 

Then a long wave trough begins to approach from West for the start of next week. That would bring potentially excessive/flooding rains to the area. Water levels should remain high with the continued light rain chances between now and then.

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