uncle W Posted October 19, 2011 Share Posted October 19, 2011 No temperatures below 35 since 1992...Where have all the cold October days gone?...The sixties and seventies produced many days freezing or below...Coldest temperature was 28 on 10/27/1936... Coldest October days... max...min...date... 45......33......10/29/2011 51......36......10/24/2003 44......37......10/30/2002 46......36......10/29/2000 51......34......10/20/1992 48......31......10/31/1988 42......29......10/27/1976 45......29......10/28/1976 50......31......10/31/1975 48......32......10/21/1974 44......31......10/20/1974 49......32......10/19/1974 48......32......10/20/1972 51......31......10/24/1969 43......32......10/23/1969 48......32......10/29/1965 53......33......10/24/1964 39......34......10/26/1962 47......33......10/20/1952 51......30......10/22/1940 45......30......10/19/1940 43......28......10/27/1936 49......32......10/26/1933 54......32......10/29/1933 43......31......10/29/1925 38......31......10/30/1925 44......29......10/31/1925 Link to comment Share on other sites More sharing options...
mitchnick Posted October 19, 2011 Share Posted October 19, 2011 interesting BWI has had a few per this link (See "RMN" for record minimum) http://www.erh.noaa.gov/lwx/climate/bwi/Bwioct.txt interesting how 2001 saw so many record mins; not because of cold air masses per se, however, more because it was so dry that month Link to comment Share on other sites More sharing options...
Alpha5 Posted October 19, 2011 Share Posted October 19, 2011 Not even a question....UHI When you add millions of cars, buildings, planes, etc, things tend to heat up. The city has over 8 million people now, there were barely 7 million in 1970...and fewer were using heat producing objects with such frequency as we do today. To be honest, I've started to question whether KNYC is a reliable station, UHI has done too much Link to comment Share on other sites More sharing options...
bluewave Posted October 19, 2011 Share Posted October 19, 2011 My guess would be the +AMO since 1995 is contributing to the warmth. +AMO Octobers -AMO Octobers -AMO Octobers +AMO Octobers Link to comment Share on other sites More sharing options...
RU848789 Posted October 20, 2011 Share Posted October 20, 2011 Not even a question....UHI When you add millions of cars, buildings, planes, etc, things tend to heat up. The city has over 8 million people now, there were barely 7 million in 1970...and fewer were using heat producing objects with such frequency as we do today. To be honest, I've started to question whether KNYC is a reliable station, UHI has done too much Pretty compelling data - I'm sure a statistical analysis would show a major increase in the annual temperature difference over time. Thanks for sharing... Link to comment Share on other sites More sharing options...
tamarack Posted October 21, 2011 Share Posted October 21, 2011 Pretty compelling data - I'm sure a statistical analysis would show a major increase in the annual temperature difference over time. Thanks for sharing... Looking at that chart makes me wonder if West Point changed its measurement location about 1880. Prior to then they were quite close to NYC and sometimes came in milder, not what I'd expect given their latitude. Maybe they switched from feet-in-Hudson to the west edge of The Plain. Link to comment Share on other sites More sharing options...
Alpha5 Posted October 21, 2011 Share Posted October 21, 2011 Looking at that chart makes me wonder if West Point changed its measurement location about 1880. Prior to then they were quite close to NYC and sometimes came in milder, not what I'd expect given their latitude. Maybe they switched from feet-in-Hudson to the west edge of The Plain. The point is that West Point has stayed steady over the past 100 with a few up and down dips, while NYC has been so badly affected by UHI. Realistically, any climate data now from NYC cannot be compared to previous temps, UHI is too strong Link to comment Share on other sites More sharing options...
masomenos Posted October 21, 2011 Share Posted October 21, 2011 Not even a question....UHI When you add millions of cars, buildings, planes, etc, things tend to heat up. The city has over 8 million people now, there were barely 7 million in 1970...and fewer were using heat producing objects with such frequency as we do today. To be honest, I've started to question whether KNYC is a reliable station, UHI has done too much The effcts of the NYC UHI haven't changed much since the early 1900s. Link to comment Share on other sites More sharing options...
uncle W Posted October 21, 2011 Author Share Posted October 21, 2011 There was a building boom in the 1890's, 1920's and early thirties and the 70's...There was a sharp rise in average temperatures during the 1890's, 1930's and 1980's... ten yr ave.temp....highest.....lowest. 1870's.........51.8..........53.6.........49.4 1880's.........51.6..........53.2.........49.3 1890's.........52.9..........54.6.........50.4 1900's.........53.1..........55.0.........50.7 1910's.........53.0..........55.0.........50.7 1920's.........53.1..........54.9.........51.2 1930's.........54.4..........55.8.........53.0 1940's.........54.3..........56.9.........51.9 1950's.........54.8..........57.0.........52.5 1960's.........54.2..........55.1.........53.0 1970's.........54.6..........56.1.........53.0 1980's.........55.1..........56.0.........54.0 1990's.........55.6..........57.2.........53.7 2000's.........55.1..........56.8.........53.4 Link to comment Share on other sites More sharing options...
Alpha5 Posted October 21, 2011 Share Posted October 21, 2011 The effcts of the NYC UHI haven't changed much since the early 1900s. I'd like to see some evidence on this. The NYC met. area has over 21 million people, UHI is not confined just to manhattan Link to comment Share on other sites More sharing options...
bluewave Posted October 21, 2011 Share Posted October 21, 2011 1/3 of the warming in NYC since 1900 is attributed to UHI. http://www.mendeley....time-and-space/ Remove that 1/3 and NYC temperature rise is close to Albany but still about .05 more of a decade warming rate. NYC .37 degree decade rise ALB .20 degree decade rise NYC ALB Link to comment Share on other sites More sharing options...
Alpha5 Posted October 21, 2011 Share Posted October 21, 2011 1/3 of the warming in NYC since 1900 is attributed to UHI. http://www.mendeley....time-and-space/ Remove that 1/3 and NYC temperature rise is close to Albany but still about .05 more of a decade warming rate. NYC .37 degree decade rise ALB .20 degree decade rise NYC ALB Still a decent amount, .33 is nothing to sneeze at especially when you're trying to make some long term conclusions. Link to comment Share on other sites More sharing options...
bluewave Posted October 21, 2011 Share Posted October 21, 2011 Still a decent amount, .33 is nothing to sneeze at especially when you're trying to make some long term conclusions. The greatest rate of overall temperature rise is in February with .58 degree per decade. The slowest rate is in October with a .09 degree per decade rise. February October The the annual rate of increase per decade is just a little ahead of Portland, Maine. Portland Link to comment Share on other sites More sharing options...
bluewave Posted October 29, 2011 Share Posted October 29, 2011 It's about time that we dropped below 35. Link to comment Share on other sites More sharing options...
MJO812 Posted October 29, 2011 Share Posted October 29, 2011 ^^^ We dropped below 35 during the day. That's incredible. Link to comment Share on other sites More sharing options...
bluewave Posted October 29, 2011 Share Posted October 29, 2011 ^^^ We dropped below 35 during the day. That's incredible. Yeah,the warmest part of the day was right after midnight. Link to comment Share on other sites More sharing options...
joe1946 Posted October 30, 2011 Share Posted October 30, 2011 The record low temp for my area (Hillsborough, NJ) in the month of Oct was 12° on Oct 17 1933 but it looks like a typo since the next coldest record day in October is 20°. http://www.weather.c...ogy/daily/08844 Link to comment Share on other sites More sharing options...
uncle W Posted October 30, 2011 Author Share Posted October 30, 2011 33 was the low the last two days...3" of snow on top...beats them all... Link to comment Share on other sites More sharing options...
JBG Posted October 30, 2011 Share Posted October 30, 2011 Not even a question....UHI When you add millions of cars, buildings, planes, etc, things tend to heat up. The city has over 8 million people now, there were barely 7 million in 1970...and fewer were using heat producing objects with such frequency as we do today. To be honest, I've started to question whether KNYC is a reliable station, UHI has done too much These graphs say it all; Al Gore, anywhere? Link to comment Share on other sites More sharing options...
bluewave Posted October 30, 2011 Share Posted October 30, 2011 These graphs say it all; Al Gore, anywhere? For the month of October, the temperatures have actually held fairly steady over the years in NYC. I guess that's why we can still set a monthly snowfall record so early in the season and beat a record from the 1920's. Link to comment Share on other sites More sharing options...
Alpha5 Posted October 30, 2011 Share Posted October 30, 2011 Low's are more affected by UHI than highs, so I think if you want to look at climate change in the new york area objectively, you have to factor that in as well. Link to comment Share on other sites More sharing options...
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