uncle W Posted July 13, 2021 Share Posted July 13, 2021 16 minutes ago, bluewave said: Yeah, that is probably the case. Recent studies have shown how much lower the temperatures are under an urban tree canopy. The older Central Park observations weren’t located under the canopy like they are now. So it’s no surprise that NYC had more 90° and 100° days back then. This recent study found significant temperature differences between open and forested parts of parks. The differences in Central Park summer high temperatures before 1990 and after seem to match their study. The paper in the link goes into more detail than the news article. The 1990 date is around the time that the canopy began to cover the observation site. https://www.ncel.net/2019/09/01/canopy-tree-cover-can-drastically-reduce-heat-island-effect/ Results: Researchers found an urban tree canopy of at least 40% results in the most cooling – as much as four to five degrees Celsius (seven to nine degrees Fahrenheit). Anything less than 40% canopy cover results in very small amounts of cooling. Since this threshold was previously unknown, researchers hope this will guide strategies for increasing tree cover. Trees are often planted in wealthier neighborhoods. Therefore, distributing planting to be more equitable can help to not only lower temperatures but also bring mental and physical health benefits to the community. Resources: Read the full study through PNAS. did they research night time lows the same way?...its a hard way to radiate with a tree branch hanging over... Link to comment Share on other sites More sharing options...
bluewave Posted July 13, 2021 Share Posted July 13, 2021 12 minutes ago, uncle W said: did they research night time lows the same way?...its a hard way to radiate with a tree branch hanging over... They found the effect was greater on daily maximum temperatures than the minimums. Variability in daytime air temperature within the urban landscape averaged 3.5 °C (range, 1.1–5.7 °C). Temperature decreased nonlinearly with increasing canopy cover, with the greatest cooling when canopy cover exceeded 40%. The magnitude of daytime cooling also increased with spatial scale and was greatest at the size of a typical city block (60–90 m). Daytime air temperature increased linearly with increasing impervious cover, but the magnitude of warming was less than the cooling associated with increased canopy cover. Variation in nighttime air temperature averaged 2.1 °C (range, 1.2–3.0 °C), and temperature increased with impervious surface. Effects of canopy were limited at night; thus, reduction of impervious surfaces remains critical for reducing nighttime urban heat. Results suggest strategies for managing urban land-cover patterns to enhance resilience of cities to climate warming. Link to comment Share on other sites More sharing options...
forkyfork Posted July 13, 2021 Share Posted July 13, 2021 1 hour ago, 495weatherguy said: what happened to the heat? it hit 90 yesterday and will again tomorrow 1 1 Link to comment Share on other sites More sharing options...
binbisso Posted July 13, 2021 Share Posted July 13, 2021 14 minutes ago, forkyfork said: it hit 90 yesterday and will again tomorrow Newark was the only area to hit 90ﾟ yesterday The 5 boroughs Long Island most of northern New Jersey lower Hudson Valley were all between 82 and 87ﾟ. I think we gotta give the 90ﾟ threshold a break. Normal highs in the urban areas are between 86 and 88, so 90ﾟ is 2 to 4ﾟ above normal. not very special any more especially in warming climate. It's no different in Winter when a 35ﾟ high is not cold or remarkable when the normal high is 38. 95ﾟ should be the new threshold in this warming climate. anyway a beautiful 71ﾟ dew point of 67 on July 13th In this new age of global warming Link to comment Share on other sites More sharing options...
495weatherguy Posted July 13, 2021 Share Posted July 13, 2021 18 minutes ago, forkyfork said: it hit 90 yesterday and will again tomorrow I guess this is another example of how different the weather is across the area---On LI--yesterday was 82 and overcast, minimal rain, currently 70 and cloudy and muggy. Was hoping for another heatwave Link to comment Share on other sites More sharing options...
binbisso Posted July 13, 2021 Share Posted July 13, 2021 2 hours ago, SACRUS said: Departures through the 12th EWR: +1.4 TTN: +0.9 NYC: -1.1 JFK: -0.5 LGA: -0.2 I believe those departures are off a bit I know Central Park is -2 Link to comment Share on other sites More sharing options...
bluewave Posted July 13, 2021 Share Posted July 13, 2021 1 hour ago, uncle W said: then they don't care about the problem...it could be a question about who will pay for the foilage trimming... I am wondering if it would take a scientific journal article on the cooling of NYC summer high temperatures? We have shown on this forum how there has been a cooling since around 1990. Perhaps a well publicized scientific paper on how the quality of weather observations in our biggest city has been compromised would get the attention need for improvement. 1 Link to comment Share on other sites More sharing options...
nycwinter Posted July 13, 2021 Share Posted July 13, 2021 lovely day for the city nice comfortable temps wont hit 80 for almost the middle of july not bad at all.. Link to comment Share on other sites More sharing options...
gravitylover Posted July 13, 2021 Share Posted July 13, 2021 48 minutes ago, forkyfork said: it hit 90 yesterday and will again tomorrow I stayed in the low to mid 70s. It's 71 now. Link to comment Share on other sites More sharing options...
forkyfork Posted July 13, 2021 Share Posted July 13, 2021 4 minutes ago, gravitylover said: I stayed in the low to mid 70s. It's 71 now. let's revisit this sunday 2 1 Link to comment Share on other sites More sharing options...
Brian5671 Posted July 13, 2021 Share Posted July 13, 2021 8 minutes ago, gravitylover said: I stayed in the low to mid 70s. It's 71 now. All depends where you are-same here only in the 70's last few days and only 69 here right now. Areas north of NYC much cooler last 3 days 1 Link to comment Share on other sites More sharing options...
uncle W Posted July 13, 2021 Share Posted July 13, 2021 38 minutes ago, bluewave said: I am wondering if it would take a scientific journal article on the cooling of NYC summer high temperatures? We have shown on this forum how there has been a cooling since around 1990. Perhaps a well publicized scientific paper on how the quality of weather observations in our biggest city has been compromised would get the attention need for improvement. day time highs could be as much as four degrees cooler and two degrees warmer for the lows...Central Park went down hill when the weather service moved out of NYC 50 miles east... Link to comment Share on other sites More sharing options...
binbisso Posted July 13, 2021 Share Posted July 13, 2021 We can go 90, 93, 93 and 90 over the next 4 days starting tomorrow And some would be impressed But that would be slightly above normal for mid July and really nice weather for outdoor activities such as beaches pools barbecues. Most reporting stations in the metro area will still be slightly below normal or normall after this period except for Newark. This will not be a July to remember except for convection and rains Link to comment Share on other sites More sharing options...
thunderbolt Posted July 13, 2021 Share Posted July 13, 2021 10 minutes ago, binbisso said: We can go 90, 93, 93 and 90 over the next 4 days starting tomorrow And some would be impressed But that would be slightly above normal for mid July and really nice weather for outdoor activities such as beaches pools barbecues. Most reporting stations in the metro area will still be slightly below normal or normall after this period except for Newark. This will not be a July to remember except for convection and rains It’s not really so much about the temperature it’s more about the Humidity 1 Link to comment Share on other sites More sharing options...
binbisso Posted July 13, 2021 Share Posted July 13, 2021 8 minutes ago, thunderbolt said: It’s not really so much about the temperature it’s more about the Humidity I agree but going off of today's 12ZGFS Dew points the next 4 days starting tomorrow are between 65 to 70 at 2:00 p.m. each day. Obviously near the water on Long Island and coastal New Jersey will probably be several degrees higher. not that spectacular for mid July it could be much worse Link to comment Share on other sites More sharing options...
Brian5671 Posted July 13, 2021 Share Posted July 13, 2021 6 minutes ago, binbisso said: I agree but going off of today's 12ZGFS Dew points the next 4 days starting tomorrow are between 65 to 70 at 2:00 p.m. each day. Obviously near the water on Long Island and coastal New Jersey will probably be several degrees higher. not that spectacular for mid July it could be much worse it's when it's over 70 that it feels truly awful. 1 Link to comment Share on other sites More sharing options...
bluewave Posted July 13, 2021 Share Posted July 13, 2021 54 minutes ago, uncle W said: day time highs could be as much as four degrees cooler and two degrees warmer for the lows...Central Park went down hill when the weather service moved out of NYC 50 miles east... They were going to close the site in the early 1990s when the NWS moved. So maybe they made the trade off just to keep the site going. But how hard can it be to manage the tree growth around the ASOS? https://vlab.noaa.gov/web/nws-heritage/-/100-years-of-weather-observations-at-belvedere-castle-in-central-park http://www.weather2000.com/ASOS/NYC_ASOS.html Link to comment Share on other sites More sharing options...
Maureen Posted July 13, 2021 Share Posted July 13, 2021 42 minutes ago, thunderbolt said: It’s not really so much about the temperature it’s more about the Humidity Today is the perfect example of that. Mid 70s, but it feels far warmer. Link to comment Share on other sites More sharing options...
A Moonlit Sky Posted July 13, 2021 Share Posted July 13, 2021 1 hour ago, gravitylover said: I stayed in the low to mid 70s. It's 71 now. Same in Brookfield. Link to comment Share on other sites More sharing options...
tdp146 Posted July 13, 2021 Share Posted July 13, 2021 51 minutes ago, bluewave said: They were going to close the site in the early 1990s when the NWS moved. So maybe they made the trade off just to keep the site going. But how hard can it be to manage the tree growth around the ASOS? https://vlab.noaa.gov/web/nws-heritage/-/100-years-of-weather-observations-at-belvedere-castle-in-central-park http://www.weather2000.com/ASOS/NYC_ASOS.html This could easily be Fixed Link to comment Share on other sites More sharing options...
RippleEffect Posted July 13, 2021 Share Posted July 13, 2021 This is the worst summer weather wise! No sun! Rain rain rain 2 Link to comment Share on other sites More sharing options...
Brian5671 Posted July 13, 2021 Share Posted July 13, 2021 Just now, RippleEffect said: This is the worst summer weather wise! No sun! Rain rain rain A warmer mini version of 2009 (which was truly terrible) Link to comment Share on other sites More sharing options...
RippleEffect Posted July 13, 2021 Share Posted July 13, 2021 1 hour ago, Brian5671 said: A warmer mini version of 2009 (which was truly terrible) How was the winter 2009-10? 1 Link to comment Share on other sites More sharing options...
Brian5671 Posted July 13, 2021 Share Posted July 13, 2021 18 minutes ago, RippleEffect said: How was the winter 2009-10? great for Jersey south-terrible here. Missed everything except the Dec storm... Link to comment Share on other sites More sharing options...
Rjay Posted July 13, 2021 Share Posted July 13, 2021 23 minutes ago, Brian5671 said: great for Jersey south-terrible here. Missed everything except the Dec storm... Yea February was awful. Link to comment Share on other sites More sharing options...
bluewave Posted July 13, 2021 Share Posted July 13, 2021 The warm front will come back north tomorrow with more 90° heat in the warm spots and widespread 70s dew points. 1 Link to comment Share on other sites More sharing options...
doncat Posted July 13, 2021 Share Posted July 13, 2021 ^Yeah temp went nowhere today 73/69 split. Link to comment Share on other sites More sharing options...
SRRTA22 Posted July 13, 2021 Share Posted July 13, 2021 No where near the summer of 09 1 Link to comment Share on other sites More sharing options...
uncle W Posted July 13, 2021 Share Posted July 13, 2021 2009 was a very cool Summer with the warmest part coming in August...1960 was similar...the following winters yielded over 50" of snow each... 1 Link to comment Share on other sites More sharing options...
CIK62 Posted July 14, 2021 Share Posted July 14, 2021 GFS dropping most of the upcoming rains and turning on the heat instead. Have to figure that would happen because we are close to being the wettest ever July with 18 days to go. 1 2 Link to comment Share on other sites More sharing options...
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