• Member Statistics

    16,739
    Total Members
    7,904
    Most Online
    Bluewater Performance
    Newest Member
    Bluewater Performance
    Joined
wdrag

April 2021

Recommended Posts

9 minutes ago, CIK62 said:

DEW POINT DEPRESSIONS EXCEEDED 60 DEGREES IN MANY SPOTS AT 5PM.

1617742800-bHDu4dvtfpA.png

I was looking at the temperatures so far this month and every recording station in our area is slightly below normal thru the 5th except for Central Park. The reason, the heat island affect. On April 3 every station had a low temperature of 28-34 degrees, except Central Park which was only 47 degrees for a low. The stations were Bridgeport, LaGuardia, Kennedy, Islip and Newark.

Share this post


Link to post
Share on other sites

Volatility is something that'll continue to grow in the years ahead. 

Nice 30+ degree diurnal range too. Was in the upper 30s this morning and 72F for the high.

Share this post


Link to post
Share on other sites
20 minutes ago, lee59 said:

I was looking at the temperatures so far this month and every recording station in our area is slightly below normal thru the 5th except for Central Park. The reason, the heat island affect. On April 3 every station had a low temperature of 28-34 degrees, except Central Park which was only 47 degrees for a low. The stations were Bridgeport, LaGuardia, Kennedy, Islip and Newark.

The heat island is baked into the city’s temps averages already. The heat Island around the park really isn’t changed in the past 60 years 

  • Like 1

Share this post


Link to post
Share on other sites
46 minutes ago, lee59 said:

I was looking at the temperatures so far this month and every recording station in our area is slightly below normal thru the 5th except for Central Park. The reason, the heat island affect. On April 3 every station had a low temperature of 28-34 degrees, except Central Park which was only 47 degrees for a low. The stations were Bridgeport, LaGuardia, Kennedy, Islip and Newark.

Central Park got to 32. The 47-degree figure was an error and has since been corrected.




			
		
  • Like 2

Share this post


Link to post
Share on other sites

On this date in 1982, a blizzard brought widespread heavy snow to New York City into New England. This time around, springlike warmth prevailed. As a result of today's warmth, Central Park now has a monthly anomaly of 0.5° above normal.

New York City finished winter 2020-21 with 38.6" snow. That was New York City's 39th highest seasonal figure on record. Over the past 30 winters, New York City has averaged 30.3" of snow.

Newark's final snowfall figure of 45.7" ranked 14th highest. Over the past 30 winters, Newark has averaged 32.4" of snow.

Philadelphia's final snowfall amount of 23.9" ranked as that city's 49th highest figure on record. Over the past 30 winters, Philadelphia has averaged 23.4" of snow.

In the northern Middle Atlantic and southern New England areas, temperatures will likely top out in the 60s through Thursday. Some areas could again reach 70°. Afterward, it will become somewhat cooler. Then, temperatures could be confined mainly to the 50s in much of the region. Based on the latest guidance, no significant precipitation is likely into the weekend.

Up north, excessive warmth will develop in northeastern Canada where some record high temperatures will be possible from tomorrow through Saturday.

The ENSO Region 1+2 anomaly was -1.1°C and the Region 3.4 anomaly was -0.5°C for the week centered around March 31. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -0.25°C and the ENSO Region 3.4 anomaly has averaged -0.63°C. La Niña conditions will likely give way to neutral-cool ENSO conditions as the spring progresses.

The SOI was -0.58 today.

The preliminary Arctic Oscillation (AO) figure was +0.301 today.

On April 4 the MJO was in Phase 5 at an amplitude of 1.419 (RMM). The April 3-adjusted amplitude was 1.562 (RMM).

 

  • Thanks 1

Share this post


Link to post
Share on other sites
45 minutes ago, donsutherland1 said:

Central Park got to 32. The 47-degree figure was an error and has since been corrected.


 

Ok good. I checked this afternoon on the NWS site and it said 47. I couldn't believe there was that much difference but it certainly would not have been the first time. So many times I am some 10 degrees colder in the morning than Central Park, when the wind is still.

  • Like 1

Share this post


Link to post
Share on other sites
2 hours ago, CIK62 said:

DEW POINT DEPRESSIONS EXCEEDED 60 DEGREES IN MANY SPOTS AT 5PM.

1617742800-bHDu4dvtfpA.png

What is a dew point depression?

Share this post


Link to post
Share on other sites

records from the 1800's had very little heat island to work with...the outer boroughs were mostly farms and trees...not to mention New Jersey where most of our cold air has to travel over before it gets here...I wouldn't throw out the old records but look at them differently...maye record highs and lows should only go back to the 1930's...

  • Like 3

Share this post


Link to post
Share on other sites
23 minutes ago, TriPol said:

What is a dew point depression?

The difference between the actual air temperature and the dewpoint.  

For example, if the air temperature is 70 degrees, and the dewpoint is 10, you get a dewpoint depression of 60.

It's not a commonly used met term, but is neat to chart on a day like today when it's very dry and you end up with large difference between air temperature and dewpoint.

 

  • Like 1

Share this post


Link to post
Share on other sites
4 hours ago, gpsnavigator said:

The difference between the actual air temperature and the dewpoint.  

For example, if the air temperature is 70 degrees, and the dewpoint is 10, you get a dewpoint depression of 60.

It's not a commonly used met term, but is neat to chart on a day like today when it's very dry and you end up with large difference between air temperature and dewpoint.

 

That's interesting actually.  This time of year would probably have the highest DP depression on average since it's typically dry warmth.

  • Like 1

Share this post


Link to post
Share on other sites

The next 8 days are averaging 55degs.(49/60), or about +3.0.

Models have just 1.0" to 1.5" now from the 10th to the 15th.

The 13th---20th. looks BN.

I made 71*(21%RH) yesterday, but I am 1500' from the ocean.

54*(40%RH) here at 6am, thin broken overcast.      55*(35%RH) at 7am.       60* by Noon, brightening skies.          Variable 57* to 60* during Noon to 3pm.         59* here at 4pm and 71* in NYC.     55* by 8pm.

Share this post


Link to post
Share on other sites
16 hours ago, bluewave said:

First time the relative humidity at Newark dropped under 10% since 2012.

Newark Liberty SUNNY     69   8   9

https://mesonet.agron.iastate.edu/plotting/auto/?_wait=no&q=157&network=NJ_ASOS&station=EWR&year=2021&var=min_rh&dir=below&thres=0&dpi=100&_fmt=png

B649D3E3-9CB7-4501-9F4A-E30858EF2FCF.png.57e6086cab5e73bfd662eed07eba661a.png
CF6CD207-F644-4A66-861E-682F5A59A468.png.dcf12dd7bb6cb27c3f4989ed90e43769.png

 

Was below 10% at NYC also, what about JFK?

Did it get below 10% during the dry heatwave in April 2002?

 

 

Share this post


Link to post
Share on other sites
11 hours ago, donsutherland1 said:

On this date in 1982, a blizzard brought widespread heavy snow to New York City into New England. This time around, springlike warmth prevailed. As a result of today's warmth, Central Park now has a monthly anomaly of 0.5° above normal.

New York City finished winter 2020-21 with 38.6" snow. That was New York City's 39th highest seasonal figure on record. Over the past 30 winters, New York City has averaged 30.3" of snow.

Newark's final snowfall figure of 45.7" ranked 14th highest. Over the past 30 winters, Newark has averaged 32.4" of snow.

Philadelphia's final snowfall amount of 23.9" ranked as that city's 49th highest figure on record. Over the past 30 winters, Philadelphia has averaged 23.4" of snow.

In the northern Middle Atlantic and southern New England areas, temperatures will likely top out in the 60s through Thursday. Some areas could again reach 70°. Afterward, it will become somewhat cooler. Then, temperatures could be confined mainly to the 50s in much of the region. Based on the latest guidance, no significant precipitation is likely into the weekend.

Up north, excessive warmth will develop in northeastern Canada where some record high temperatures will be possible from tomorrow through Saturday.

The ENSO Region 1+2 anomaly was -1.1°C and the Region 3.4 anomaly was -0.5°C for the week centered around March 31. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -0.25°C and the ENSO Region 3.4 anomaly has averaged -0.63°C. La Niña conditions will likely give way to neutral-cool ENSO conditions as the spring progresses.

The SOI was -0.58 today.

The preliminary Arctic Oscillation (AO) figure was +0.301 today.

On April 4 the MJO was in Phase 5 at an amplitude of 1.419 (RMM). The April 3-adjusted amplitude was 1.562 (RMM).

 

NYC finished 0.1" ahead of Boston!

 

Also yesterday was the anniversary of the April 1982 blizzard and today is the anniversary of the April 2003 snowstorm!

Lee Goldberg keeps mentioning incorrect information.....yesterday he kept saying NYC got 10 inches of snow in the Blizzard of 1982 and then got another 10 inches of snow the following year, in May!  We've never even had a 1 inch snow event in May let alone a 10 inch one!

 

Share this post


Link to post
Share on other sites
10 hours ago, gpsnavigator said:

The difference between the actual air temperature and the dewpoint.  

For example, if the air temperature is 70 degrees, and the dewpoint is 10, you get a dewpoint depression of 60.

It's not a commonly used met term, but is neat to chart on a day like today when it's very dry and you end up with large difference between air temperature and dewpoint.

 

I wonder what it was in April 2002 when we had that dry heatwave?

Share this post


Link to post
Share on other sites
23 hours ago, LibertyBell said:

Was below 10% at NYC also, what about JFK?

Did it get below 10% during the dry heatwave in April 2002?

 

 

JFK made it down to 10%. March and April typically have our lowest relative humidity readings of the year. It will be interesting to see if anyone can find the relative humidity during the July 1936 dust bowl heatwave.
 

  • Like 1

Share this post


Link to post
Share on other sites

Morning thoughts...

It will be mostly sunny and warm. High temperatures will likely reach the upper 60s and lower 70s in most of the region. Likely high temperatures around the region include:

New York City (Central Park): 70°

Newark: 71°

Philadelphia: 71°

Tomorrow will be partly cloudy and still mild. It could turn somewhat cooler during the latter part of the week and weekend. Temperatures could then be confined mainly to the upper 50s with some lower 60s.

Share this post


Link to post
Share on other sites
1 hour ago, LibertyBell said:

NYC finished 0.1" ahead of Boston!

 

Also yesterday was the anniversary of the April 1982 blizzard and today is the anniversary of the April 2003 snowstorm!

Lee Goldberg keeps mentioning incorrect information.....yesterday he kept saying NYC got 10 inches of snow in the Blizzard of 1982 and then got another 10 inches of snow the following year, in May!  We've never even had a 1 inch snow event in May let alone a 10 inch one!

 

During the April 1982 blizzard, New York City (JFK: 8.0”; LGA” 8.2”; NYC: 9.6”) did not see any of its major stations quite reach 10”. Outside the City, Newark picked up 12.8” and Islip received 16.0”.

During the May 1977 snowfall, New York City saw a trace of snow. Some parts of New York State picked up 10” or more of snow e.g., Tannersville received 13.0” of snow.

  • Like 2

Share this post


Link to post
Share on other sites

So,  it definitely gets pretty wet here this weekend (especially later Sat-early Mon) and as WPC now has, general 1", and can see more in spots. No snow. Wind gusts 40kt not completely out for Sunday-Monday morning LI, but probably just a typical wet April event. Elevation snow: no go. 

Fri 16th-Tue 20th: Still a Canadian block and now a +PNA... could get more interesting.  Ensembles, as usual, but climatologically less favorable, have minor elevation snowfall nw edge of the forum.  Can see another decent qpf event, depends if we get a low just to our south, which is possible in this developing pattern, or maybe it will be just be a wet cold front with primary vort-low across upper NYS?  To be determined (TBD). Back in a couple of days. 

 

Edit:  348P.  Didn't check ens trends but will in a couple of days but 12z/7 EC OP doing it again in this EXTENDED period next weekend. elevated snow acc.  We'll see if it sticks around long enough (5 more days) for a thread, or disappears like that of this coming weekend. Have a night. Back tomorrow or Fri.  

  • Like 2

Share this post


Link to post
Share on other sites

The April forecast looks like a continuation of the winter south based blocking theme with spring wavelengths. This week the south based blocking allowed highs around 70°. Looks like our first chances for heavier rain will come on Sunday. Next week appears generally cooler than this week as the -AO and +PNA gets stronger. But the south based blocking should allow enough ridging near the East Coast. This will keep the coolest temperature departures to our west which has been a frequent theme. Perhaps more rain chances for the gardening interests.

 

E592AFC9-E0A6-459B-9CC9-019AAFACA81E.thumb.png.38274eed7320a00c10880c9b539df033.png
AFD13621-31EB-458D-A3A1-614F31CCCC48.thumb.png.46f0fc99d8b73707a39b58444f9f9728.png

47D72F7B-C8D1-4E00-9553-9B3CDE329F0F.thumb.png.2851d5aa5b321022f44947c0adadea39.png

D5AF5E6A-5D17-4990-B2B8-56472322CC49.thumb.png.5edfe1f1809e3ef81c2ea85a67b194ba.png

  • Like 1
  • Thanks 1

Share this post


Link to post
Share on other sites

Picked up 0.13 here.  Rain ending clouds look to linger till at least noon.  Those mostly  sunny call looked off by 8 hours on the timing

 

 

GOES16-NE-GEOCOLOR-600x600.gif

  • Like 1
  • Thanks 1

Share this post


Link to post
Share on other sites
1 hour ago, FPizz said:

.15" of rain so far this morning.  Still getting some light rain.

Whats up with this rain?? I left my cornhole boards in the driveway last night, grrr

Share this post


Link to post
Share on other sites
1 hour ago, Poker2015 said:

Whats up with this rain?? I left my cornhole boards in the driveway last night, grrr

There was a 20% chance I saw...apparently 100% here, haha!  I think it is done at least.  Hopefully it wasn't enough to damage those boards :)

  • Like 1

Share this post


Link to post
Share on other sites

Edit:  348P edit to the morning post.  Didn't check ens trends but will in a couple of days but 12z/7 EC OP doing it again in this EXTENDED period next weekend (17-18ish) elevated snow acc.  We'll see if it sticks around long enough (5 more days) for a thread, or disappears like that of this coming weekend. Have a night. Back tomorrow or Fri.  

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...

  • Recently Browsing   0 members

    No registered users viewing this page.