uncle W Posted September 9, 2015 Share Posted September 9, 2015 I used the ten year period starting with 1879-80 to 1888-89...The coldest decade was 1959-60 to 1968-69...the coldest ten year period was 31.2 from 1960-61 to 1969-70... decade........winter ave. temp. 1879-80 to 1888-89....34.0 1889-90 to 1898-99....34.7 1899-00 to 1908-09....33.9 1909-10 to 1918-19....34.7 1919-20 to 1928-29....35.3 1929-30 to 1938-39....36.7 1939-40 to 1948-49....33.2 1949-50 to 1958-59....35.7 1959-60 to 1968-69....31.8 1969-70 to 1978-79....33.2 1979-80 to 1988-89....33.6 1989-90 to 1998-99....36.7 1999-00 to 2008-09....35.6 2009-10 to 2014-15....34.9 1979-80 to 2008-09....35.3 1879-80 to 2008-09....34.5 Link to comment Share on other sites More sharing options...
uncle W Posted September 9, 2015 Author Share Posted September 9, 2015 while NYC's average winter temperature is on a steady rise since the 1870's Philadelphia's aren't...the coldest period was from the 1940's to 1980's with the 1950's as the exception... Link to comment Share on other sites More sharing options...
BucksCO_PA Posted September 9, 2015 Share Posted September 9, 2015 while NYC's average winter temperature is on a steady rise since the 1870's Philadelphia's aren't...the coldest period was from the 1940's to 1980's with the 1950's as the exception... Good stuff Uncle NYC observations has always been taken at Central Park? Philadelphia observations were recorded at five different center city locations from Jan 1871 - JUN 1940 & then moved to the current PHL location. I believe they've even relocated observation sites at the airport on several occasions, at the very least during the ASOS implementation. 40, 50, 60 & 70 years ago the area surrounding PHL wasn't nearly as urbanized as it is today so that was a significant change from the previous center city locations. Link to comment Share on other sites More sharing options...
uncle W Posted September 9, 2015 Author Share Posted September 9, 2015 Good stuff Uncle NYC observations has always been taken at Central Park? Philadelphia observations were recorded at five different center city locations from Jan 1871 - JUN 1940 & then moved to the current PHL location. I believe they've even relocated observation sites at the airport on several occasions, at the very least during the ASOS implementation. 40, 50, 60 & 70 years ago the area surrounding PHL wasn't nearly as urbanized as it is today so that was a significant change from the previous center city locations. the location of the thermometer shelter can make a big difference...I was looking for that information but can't find it... Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted September 9, 2015 Share Posted September 9, 2015 the location of the thermometer shelter can make a big difference...I was looking for that information but can't find it... There's a site out there with some info and a google earth satellite map of the location of KPHL (based on the metar coordinates). It's not far from the river and any breezes blowing across the river towards it seem to affect the temps at times. You can zoom and pan on the map to a degree. http://weather.gladstonefamily.net/site/KPHL Link to comment Share on other sites More sharing options...
uncle W Posted September 9, 2015 Author Share Posted September 9, 2015 There's a site out there with some info and a google earth satellite map of the location of KPHL (based on the metar coordinates). It's not far from the river and any breezes blowing across the river towards it seem to affect the temps at times. You can zoom and pan on the map to a degree. http://weather.gladstonefamily.net/site/KPHL it looks like there is a possibility the shelter gets blasted by jet engines?...that wouldn't be a good thing... Link to comment Share on other sites More sharing options...
RedSky Posted September 9, 2015 Share Posted September 9, 2015 it looks like there is a possibility the shelter gets blasted by jet engines?...that wouldn't be a good thing... I had been saying that for years Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted September 9, 2015 Share Posted September 9, 2015 it looks like there is a possibility the shelter gets blasted by jet engines?...that wouldn't be a good thing... Maybe the little propeller guys hang out around that end, where the bigger jets turn off before getting that far. The image snapshot shows a couple bigger jets sitting ready to take off (if you zoom out and go due left of the location). I remember years ago the complaints about obs done on a terminal roof. It doesn't seem like that setup has been there 20 years ago this year. Link to comment Share on other sites More sharing options...
Kevin Reilly Posted September 9, 2015 Share Posted September 9, 2015 it looks like there is a possibility the shelter gets blasted by jet engines?...that wouldn't be a good thing... Thats what I call a torch!! Link to comment Share on other sites More sharing options...
uncle W Posted September 10, 2015 Author Share Posted September 10, 2015 I used the ten year period starting with 1879-80 to 1888-89...The coldest decade was 1959-60 to 1968-69...the coldest ten year period was 31.2 from 1960-61 to 1969-70... decade........winter ave. temp. 1879-80 to 1888-89....34.0 1889-90 to 1898-99....34.7 1899-00 to 1908-09....33.9 1909-10 to 1918-19....34.7 1919-20 to 1928-29....35.3 1929-30 to 1938-39....36.7 1939-40 to 1948-49....33.2 1949-50 to 1958-59....35.7 1959-60 to 1968-69....31.8 1969-70 to 1978-79....33.2 1979-80 to 1988-89....33.6 1989-90 to 1998-99....36.7 1999-00 to 2008-09....35.6 2009-10 to 2014-15....34.9 1979-80 to 2008-09....35.3 1879-80 to 2008-09....34.5 warmest and coldest winters... coldest........................................ 28.0 in 1976-77 28.3 in 1962-63 28.3 in 1903-04 28.4 in 1977-78 28.5 in 1917-18 28.6 in 1904-05 28.6 in 1874-75 28.7 in 1880-81 28.9 in 1960-61 29.6 in 1892-93 warmest......................................... 43.3 in 1931-32 42.2 in 1889-90 41.3 in 2001-02 40.7 in 2011-12 40.4 in 1997-98 39.9 in 1932-33 39.7 in 1879-80 39.1 in 1990-91 39.0 in 1912-13 39.0 in 1936-37 38.8 in 1948-49 38.7 in 1949-50 Link to comment Share on other sites More sharing options...
Isotherm Posted September 13, 2015 Share Posted September 13, 2015 I thought the requirements were > 100ft from pavement for the temperature sensor? PHL looks very close to pavement. Link to comment Share on other sites More sharing options...
famartin Posted September 13, 2015 Share Posted September 13, 2015 I thought the requirements were > 100ft from pavement for the temperature sensor? PHL looks very close to pavement. It does seem a little close... Link to comment Share on other sites More sharing options...
bigtenfan Posted September 15, 2015 Share Posted September 15, 2015 I thought that I had read somewhere that the official measuring station was actually located across the river in National Park NJ. Link to comment Share on other sites More sharing options...
famartin Posted September 15, 2015 Share Posted September 15, 2015 I thought that I had read somewhere that the official measuring station was actually located across the river in National Park NJ.Only for snow. ASOS is the primary system for NWS obs, and that is at the airport. ASOS doesn't measure snow, though, so other arrangements are needed. Link to comment Share on other sites More sharing options...
bigtenfan Posted September 15, 2015 Share Posted September 15, 2015 Only for snow. ASOS is the primary system for NWS obs, and that is at the airport. ASOS doesn't measure snow, though, so other arrangements are needed. Thank you so much. Link to comment Share on other sites More sharing options...
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