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April 2018 Discussions & Observations Thread


Rtd208

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3 hours ago, Juliancolton said:

Parachutes wafting down now. Rates weakened back to the melt/accumulation equilibrium once I hit an inch or so, but it still looks great out

I was in Poughkeepsie around 12:30 and it was snowing big flakes fairly hard at that time.

3 hours ago, snywx said:

Picked up 1.3" here this morning.. Winter feel out there today

There was easily that much in Poughkeepsie this afternoon when I was there. Nothing a few miles east of there though and just a slushy coating over 1k feet in the Taconic high country. I had a nice dense coating here at the house but it's all gone now other than on already existing sow piles. I'm kinda glad I put so much into one pile in the driveway the other day, I got to throw a snowball at my wife earlier :) 

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1 hour ago, Rtd208 said:

I am so ready for the warmer weather, the normal high is 58 around here today. I am now looking more forward to heavy rain/severe weather events versus any snow we may still see. By October I will be salivating for cold/snow again.

Current temp is 61 here.

Wish I could relate, cold season never lasts long enough imo.  

April is colder than October on average so it’s weird to see the snow hounds anxious for snow in October but wanting 70s in April

We were a little west of Binghamton this morning and got into some moderate snow for a couple of hours.  

Hopefully a couple more chances this month before the inevitable warmth comes.  

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11 minutes ago, bluewave said:

Unseasonably cold pattern here this weekend will give way to a damp spring backdoor set up next weekend. Cold MJO phases  along with -NAO and -EPO keeping the delayed spring theme going. February was the ultimate front-loaded early spring month so far in 2018.

eps_t850a_5d_noram_21.thumb.png.4e51b412c05ede64dbb47c00bfc7c843.png

eps_slp_lows_east_31.thumb.png.b526b97e0e2828207e3fc3802433c6d0.png

 

Amazing how warm Feb was with every other month since Nov, below normal.

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Atmosphere following the MJO and Teleconnections, while paying little attention to the Rossby Wave Train, which favors mostly AN temperatures for April 14-27.  It is BN for May and the whole M,J,J timeframe however.

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A strong cold front is moving across the region this morning. A few snow showers were associated with that front with one bringing snow to Newburgh. Even if some of those snow showers or flurries reach the City, no accumulation is likely.

Tomorrow morning could see the coldest temperatures so far this month. There is  a possibility that the thermometer could dip to 32° in Central Park where the lowest reading this April has been 33°.

More springlike temperatures appear likely late next week.

New York City’s Average Temperature Through:

4/6 44.6° (4.2° below normal)
4/10 42.6°-44.4° (4/6 estimate: 41.9°-45.5°)
April 15: 45.2°-48.4° (4/6 estimate: 45.0°-48.6°)

Per aggressive sensitivity analysis, the estimated probability of an below normal monthly anomaly: 55% (4/6 estimate: 55%)

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17 minutes ago, donsutherland1 said:

A strong cold front is moving across the region this morning. A few snow showers were associated with that front with one bringing snow to Newburgh. Even if some of those snow showers or flurries reach the City, no accumulation is likely.

Tomorrow morning could see the coldest temperatures so far this month. There is  a possibility that the thermometer could dip to 32° in Central Park where the lowest reading this April has been 33°.

More springlike temperatures appear likely late next week.

New York City’s Average Temperature Through:

4/6 44.6° (4.2° below normal)
4/10 42.6°-44.4° (4/6 estimate: 41.9°-45.5°)
April 15: 45.2°-48.4° (4/6 estimate: 45.0°-48.6°)

Per aggressive sensitivity analysis, the estimated probability of an below normal monthly anomaly: 55% (4/6 estimate: 55%)

It’s been in the 20’s here locally a few times this April.

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2 hours ago, bluewave said:

Even in the longer range, there is still no challenge to the 80 degree heat experienced in February.The spring high at Newark since March 1st was only able to tie the January high of 64.

I had a bad feeling this was going to happen.  Backdoor fronts almost always mean cold and damp for us.  Last April had it's fair share of cool and wet weather, however we did have some warmth mixed in.

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3 minutes ago, bluewave said:

The lack of any significant 80 degree warmth in the long range forecast is pretty unusual for April during the 2000's.

Newark April highs

2018....64 so far

2017...87

2016...83

2015...82

2014...83

2013...85

2012...88

2011...87

2010...92

2009...93

2008...82

2007...86

2006...83

2005...88

2004...88

2003...88

2002...97

2001...87

2000...78

 

I can't imagine it not hitting 80° in April.  Even after our coldest seasons that was always a "treat."  However, I agree with you,  and the LR does not look great as of right now.

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7 minutes ago, bluewave said:

It will be interesting to see how long this cooler spring pattern runs. While it's out in experimental range, the new Euro monthlies just went cool for May.

Funny when you think back to 2015 and the May torch.  That AN streak was impressive and lasted into December.  I'm hoping this pattern breaks sooner than later.

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2 hours ago, bluewave said:

The lack of any significant 80 degree warmth in the long range forecast is pretty unusual for April during the 2000's.

Newark April highs

2018....64 so far

2017...87

2016...83

2015...82

2014...83

2013...85

2012...88

2011...87

2010...92

2009...93

2008...82

2007...86

2006...83

2005...88

2004...88

2003...88

2002...97

2001...87

2000...78

 

Newark's first 70 day in 1940 was April 30th...the first 70 in NYC in 1940 was in early May...

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NYC's average April max is 81...

since 1930 there have been eight years counting 2018 that had a 70 degree day or warmer in NYC...it happened in 1874 but I don't have access to that years dailies...

year...Feb...Mar...Apr...max

1930...75....63....76

1949...73....75....79

1954...71....68....78

1976...70....72....96

1985...75....82....88

1997...72....68....74

2017...70....70....87

2018...80....62....??

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39 minutes ago, nycwinter said:

this is the time of year until tropical season gets going.. that the weather is so boring...

Uh, you have peak severe season between now and then and that’s awesome. 

Cant recommend enough going storm chasing with a good tour group.  Mind blowingly fun if you get lucky and catch a good storm.

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Next 8 days averaging 51degs., or 1deg. AN.

Rossby Wave Train is AN for 5-day periods centered on 15th, 20th., 25th.   Then BN till May 20th.  Below normal heights creep back in from across the Atlantic, like early March.

Just below 33degs. right now,  6:30am.

Stayed below 33 for an hour+, but failed to reach 32. (32.7).

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EPS has been shifting stronger recently with the SE ridge on Friday. Could be the best shot at first  spring 70's in the warmer spots. Looks like maybe a day or 2 of spring-like conditions before getting cooler again.

New run

ecmwf-ens_z500a_us_7.thumb.png.cae5e677cea3b0ff6d5e2b4a60b4e47c.png

Old run

ecmwf-ens_z500a_us_9.thumb.png.8611da041bbfee28313807157a95af63.png

 

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This morning, New York City had its first freezing temperature in April since April 10, 2016 when the temperature fell to 31°. Last April’s coldest reading in the City was 37°.

Outside New York City, temperatures were in the 20s. Select readings included:

Danbury: 28°
Morristown: 28°
Newburgh: 25°
Poughkeepsie: 25°
White Plains: 28°

As the week progresses, warmer readings appear likely. The Thursday-Sunday period will likely see readings in the 60s. The potential for one or two 70° or warmer temperatures exists.

New York City’s Average Temperature Through:

4/7 44.4° (4.6° below normal)
4/10 42.7°-43.9° (4/7 estimate: 42.6°-44.4°)
April 15: 46.4°-49.2° (4/7 estimate: 45.2°-48.4°)

Per aggressive sensitivity analysis, the estimated probability of an below normal monthly anomaly: 54% (4/7 estimate: 55%)

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We recorded another first this snow season. This was the most snowfall on record in NYC for a 2nd year La Nina going back to 1950.

55-56...33.5

67-68...19.5

71-72...22.9

74-75...13.1

84-85...24.1

96-97...10.1

99-00...16.3

08-09...27.6

11-12....7.4

17-18....40.9....add several inches for under counts.

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