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April 2014 discussion


Mikehobbyst

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Well what underwhelmed yesterday overwhelmed today, mid 60s now above forecast upper 50s for today. The dreaded easterly flow this time of year will make tomorrow feel entirely different, low to mid 40s for highs on Friday with cloudy skies and rain is ouch.

Yep typical April..today's a beautiful day tomorrow not so much. That's why its hard to make definitive statements about springlike weather this time of year. We can easily over or underperform

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Yep typical April..today's a beautiful day tomorrow not so much. That's why its hard to make definitive statements about springlike weather this time of year. We can easily over or underperform

Yes it is and I continue to worry about BDCF despite the models depictions of warmer weather later this month and Canada will still be below normal. It will time some time for the waters to warm, but typically these next two months can have some of the nicest weather you'll find all year. This period, early April to mid-late May and the late September through early November period can be some of the best. 

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Teteboro is also at 67. Newark is at 63 and getting a breeze off the bay.

 

Newark has been very close to NYC for maximum April warmth since 2000. The April high since 2000 at Central Park

is 96 and 97 for Newark. But during the summers since 2000, the overgrowth around the NYC ASOS kept the high

at 104 while Newark made 108. I am thinking  that NYC would have made it to around 106  had the vegetation

been at pre 90's levels.

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Newark has been very close to NYC for maximum April warmth since 2000. The April high since 2000 at Central Park

is 96 and 97 for Newark. But during the summers since 2000, the overgrowth around the NYC ASOS kept the high

at 104 while Newark made 108. I am thinking  that NYC would have made it to around 106  had the vegetation

been at pre 90's levels.

a four degree spread on hot days between Newark and KNYC happened before the veggies took over...July 9th 1936 KNYC hit 106 while Newark hit 104 but most of the time Newark was warmer or the same...

date...Newark...KNYC...

6/15/1994...101.....96

6/19/1994...102.....98

6/22/1988...101.....98

7/03/1966...105...103

7/04/1949...105...102

7/02/1963.....99.....94

7/10/1993...105...102

7/31/1954...103...100

9/02/1953...105...102

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Well what underwhelmed yesterday overwhelmed today, mid 60s now above forecast upper 50s for today. The dreaded easterly flow this time of year will make tomorrow feel entirely different, low to mid 40s for highs on Friday with cloudy skies and rain is ouch. 

 

Yea tomorrow is not going to be that great.

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a four degree spread on hot days between Newark and KNYC happened before the veggies took over...July 9th 1936 KNYC hit 106 while Newark hit 104 but most of the time Newark was warmer or the same...

date...Newark...KNYC...

6/15/1994...101.....96

6/19/1994...102.....98

6/22/1988...101.....98

7/03/1966...105...103

7/04/1949...105...102

7/02/1963.....99.....94

7/10/1993...105...102

7/31/1954...103...100

9/02/1953...105...102

 

NYC and EWR  seemed to be within 2 degrees of each other quite a bit before the 2000's on some of 

hottest days of the year.

 

NYC... 7/21/77...104

EWR...7/21/77...102

 

NYC...7/20/80...101

EWR..7/20/80...101

 

NYC...8/20/83...96

EWR..8/20/83...97

 

NYC...7/16/88..99

EWR..7/16/88..101

 

NYC...7/15/95....102

EWR..7/15/95....104

 

NYC.. 7/5/99.......101

EWR..7/5/99.......103

 

NYC..8/9/01.....103

EWR.8/9/01.....105

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Amazing what an east wind can do this time of year. Yuck.

 

f21.gif

john, c'mon man we were enjoying today now you post this depressing graphic :LOL.

 

seriously though looks like from just past mid month on some noticeable moderation should start to take place in our region with some SE ridge push

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99% chance its over. Gfs is near 70 next Friday

It could be even warmer than that if the gfs is correct but we're talking over a week out and it's always tricky at the coast in early Spring. I would be happy to hold off on the 70s until May tbh. Why rush them since they'll be here with us for the next several months.

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NYC and EWR  seemed to be within 2 degrees of each other quite a bit before the 2000's on some of 

hottest days of the year.

 

NYC... 7/21/77...104

EWR...7/21/77...102

 

NYC...7/20/80...101

EWR..7/20/80...101

 

NYC...8/20/83...96

EWR..8/20/83...97

 

NYC...7/16/88..99

EWR..7/16/88..101

 

NYC...7/15/95....102

EWR..7/15/95....104

 

NYC.. 7/5/99.......101

EWR..7/5/99.......103

 

NYC..8/9/01.....103

EWR.8/9/01.....105

8/9/01 i was out on the golf course....hottest day ever

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Newark has been very close to NYC for maximum April warmth since 2000. The April high since 2000 at Central Park

is 96 and 97 for Newark. But during the summers since 2000, the overgrowth around the NYC ASOS kept the high

at 104 while Newark made 108. I am thinking  that NYC would have made it to around 106  had the vegetation

been at pre 90's levels.

 

This comes up a lot and I've been thinking about this.  It is probably true that the vegetation keeps the park cooler than the surrounding developed city during the growing season, but that is representative of the climate in the park and not as some say, an error in siting the sensors.  Nor does it represent any malfeasance in not removing or trimming the plants.  You could argue that NYC could have been around 110 if they had blacktopped the park, but then it wouldn't be the park that it is.  Really, the heat island is more of an aberration than the readings from the park.

 

I am not aware of any reliable published readings from street side weather stations in Manhattan, but wouldn't be surprised if there were some crazy summertime maxes in spots.

 

Here is an interesting take on heat island and a partial solution to reducing it:

 

http://www.theguardian.com/environment/2010/sep/02/green-roof-urban-heat-island

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This comes up a lot and I've been thinking about this.  It is probably true that the vegetation keeps the park cooler than the surrounding developed city during the growing season, but that is representative of the climate in the park and not as some say, an error in siting the sensors.  Nor does it represent any malfeasance in not removing or trimming the plants.  You could argue that NYC could have been around 110 if they had blacktopped the park, but then it wouldn't be the park that it is.  Really, the heat island is more of an aberration than the readings from the park.

 

I am not aware of any reliable published readings from street side weather stations in Manhattan, but wouldn't be surprised if there were some crazy summertime maxes in spots.

 

Here is an interesting take on heat island and a partial solution to reducing it:

 

http://www.theguardian.com/environment/2010/sep/02/green-roof-urban-heat-island

 

The cooling of daily highs relative to the means all about the increasing vegetation growth around the sensor.

 

http://www.americanwx.com/bb/index.php/topic/40726-central-park-summer-cooling-since-the-90s/

 

 

 

 

 

 

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The cooling of daily highs relative to the means all about the increasing vegetation growth around the sensor.

 

http://www.americanwx.com/bb/index.php/topic/40726-central-park-summer-cooling-since-the-90s/

 

attachicon.gif100.gif

 

attachicon.gifNYCMAX.gif

 

Is it possible that increased UHI or some other factor at LGA has also contributed to the discrepancy in relative number of 90 degree days between the sites?

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The Euro and GFS have a strong southerly jet and pwats near 1.50" with the warm front on Monday night. We have potential for elevated convection and rainfall totals 1"+, out of that system alone.

 

0z Euro had 1"-1.50" areawide with the Monday night system.

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