snowwors2 Posted January 25, 2014 Share Posted January 25, 2014 Will be going on 120 hrs later tonight here in Maple Glen PA.....How long will we stay below 32f? Link to comment Share on other sites More sharing options...
KamuSnow Posted January 26, 2014 Share Posted January 26, 2014 Will be going on 120 hrs later tonight here in Maple Glen PA.....How long will we stay below 32f? It appears that Monday is the only potential fly in the ointment that could keep that 120 from at least doubling. Link to comment Share on other sites More sharing options...
snowwors2 Posted January 26, 2014 Author Share Posted January 26, 2014 It appears that Monday is the only potential fly in the ointment that could keep that 120 from at least doubling. Agreed...somehow it think we'll stay below Monday! Link to comment Share on other sites More sharing options...
famartin Posted January 26, 2014 Share Posted January 26, 2014 PHL's longest stretches of freezing or below: Rank 1; Number of days 15; Dates 1979-02-06 to 1979-02-19 Rank 1; Number of days 15; Dates 1961-01-19 to 1961-02-02 Rank 3; Number of days 13; Dates 1893-01-10 to 1893-01-22 Rank 4; Number of days 12; Dates 1936-01-23 to 1936-02-03 Rank 4; Number of days 12; Dates 1895-02-03 to 1895-02-14 Rank 6; Number of days 11; Dates 1981-01-08 to 1981-01-18 Rank 6; Number of days 11; Dates 1935-12-21 to 1935-12-31 Rank 8; Number of days 10; Dates 1989-12-16 to 1989-12-25 Rank 8; Number of days 10; Dates 1982-01-10 to 1982-01-19 Rank 8; Number of days 10; Dates 1958-12-07 to 1958-12-16 Rank 8; Number of days 10; Dates 1948-01-23 to 1948-02-01 Rank 8; Number of days 10; Dates 1945-12-15 to 1945-12-24 Rank 8; Number of days 10; Dates 1899-02-05 to 1899-02-14 Rank 14; Number of days 9; Dates 2004-01-23 to 2004-01-31 Rank 14; Number of days 9; Dates 1978-01-31 to 1978-02-08 Rank 14; Number of days 9; Dates 1970-01-07 to 1970-01-15 Rank 14; Number of days 9; Dates 1966-01-25 to 1966-02-02 Rank 14; Number of days 9; Dates 1892-12-22 to 1892-12-30 Rank 19; Number of days 8; Dates 1996-01-04 to 1996-01-11 Rank 19; Number of days 8; Dates 1984-01-15 to 1984-01-22 Rank 19; Number of days 8; Dates 1980-01-30 to 1980-02-06 Rank 19; Number of days 8; Dates 1977-01-16 to 1977-01-23 Rank 19; Number of days 8; Dates 1965-01-29 to 1965-02-05 Rank 19; Number of days 8; Dates 1940-01-16 to 1940-01-23 Rank 19; Number of days 8; Dates 1917-12-29 to 1918-01-05 Rank 19; Number of days 8; Dates 1905-01-29 to 1905-02-05 Rank 19; Number of days 8; Dates 1899-12-26 to 1900-01-02 Rank 19; Number of days 8; Dates 1885-02-17 to 1885-02-24 Link to comment Share on other sites More sharing options...
snowwors2 Posted January 26, 2014 Author Share Posted January 26, 2014 Thanks Ray...if Philly somehow makes it past Monday it looks like they could go 11 days or so this time-around!!! Link to comment Share on other sites More sharing options...
al79philly Posted January 26, 2014 Share Posted January 26, 2014 I found this interesting. If you believe accuweather's forecast, it will be 18 degrees standing on the beach of the Arctic Ocean in Barrow Alaska Tuesday It will be one degree cooler in Philadelphia. It will be 40 degrees in Anchorage. I wonder how often Anchorage is 20+ degrees warmer than Philly. Even better, it will be 2 degrees warmer Tuesday night in Anchorage than it will be in Houston, Texas. Link to comment Share on other sites More sharing options...
famartin Posted January 27, 2014 Share Posted January 27, 2014 "the end" Link to comment Share on other sites More sharing options...
uncle W Posted January 27, 2014 Share Posted January 27, 2014 PHL's longest stretches of freezing or below: Rank 1; Number of days 15; Dates 1979-02-06 to 1979-02-19 Rank 1; Number of days 15; Dates 1961-01-19 to 1961-02-02 Rank 3; Number of days 13; Dates 1893-01-10 to 1893-01-22 Rank 4; Number of days 12; Dates 1936-01-23 to 1936-02-03 Rank 4; Number of days 12; Dates 1895-02-03 to 1895-02-14 Rank 6; Number of days 11; Dates 1981-01-08 to 1981-01-18 Rank 6; Number of days 11; Dates 1935-12-21 to 1935-12-31 Rank 8; Number of days 10; Dates 1989-12-16 to 1989-12-25 Rank 8; Number of days 10; Dates 1982-01-10 to 1982-01-19 Rank 8; Number of days 10; Dates 1958-12-07 to 1958-12-16 Rank 8; Number of days 10; Dates 1948-01-23 to 1948-02-01 Rank 8; Number of days 10; Dates 1945-12-15 to 1945-12-24 Rank 8; Number of days 10; Dates 1899-02-05 to 1899-02-14 Rank 14; Number of days 9; Dates 2004-01-23 to 2004-01-31 Rank 14; Number of days 9; Dates 1978-01-31 to 1978-02-08 Rank 14; Number of days 9; Dates 1970-01-07 to 1970-01-15 Rank 14; Number of days 9; Dates 1966-01-25 to 1966-02-02 Rank 14; Number of days 9; Dates 1892-12-22 to 1892-12-30 Rank 19; Number of days 8; Dates 1996-01-04 to 1996-01-11 Rank 19; Number of days 8; Dates 1984-01-15 to 1984-01-22 Rank 19; Number of days 8; Dates 1980-01-30 to 1980-02-06 Rank 19; Number of days 8; Dates 1977-01-16 to 1977-01-23 Rank 19; Number of days 8; Dates 1965-01-29 to 1965-02-05 Rank 19; Number of days 8; Dates 1940-01-16 to 1940-01-23 Rank 19; Number of days 8; Dates 1917-12-29 to 1918-01-05 Rank 19; Number of days 8; Dates 1905-01-29 to 1905-02-05 Rank 19; Number of days 8; Dates 1899-12-26 to 1900-01-02 Rank 19; Number of days 8; Dates 1885-02-17 to 1885-02-24 great stats...can you post the most and least amount of seasonal days 32 or lower?...... Link to comment Share on other sites More sharing options...
famartin Posted January 27, 2014 Share Posted January 27, 2014 Rank Number Season Rank Number Season 1 1 1997-1998 1 45 1977-1978 2 3 2001-2002 2 44 1884-1885 3 4 2011-2012 3 39 1903-1904 3 4 1952-1953 4 36 1976-1977 3 4 1931-1932 4 36 1917-1918 3 4 1918-1919 4 36 1904-1905 7 6 2005-2006 4 36 1874-1875 7 6 1990-1991 8 35 1935-1936 7 6 1974-1975 8 35 1892-1893 7 6 1948-1949 8 35 1876-1877 7 6 1936-1937 11 34 1880-1881 12 7 1930-1931 12 33 1919-1920 12 7 1908-1909 13 32 1995-1996 12 7 1881-1882 14 31 1901-1902 12 7 1879-1880 15 30 1980-1981 12 7 1877-1878 15 30 1960-1961 17 8 2007-2008 17 29 1962-1963 17 8 1991-1992 17 29 1933-1934 17 8 1986-1987 19 28 1911-1912 17 8 1982-1983 19 28 1906-1907 17 8 1951-1952 19 28 1894-1895 17 8 1949-1950 22 27 1983-1984 17 8 1928-1929 23 26 2002-2003 17 8 1890-1891 23 26 1979-1980 17 8 1889-1890 23 26 1978-1979 26 9 2012-2013 26 25 1944-1945 26 9 1920-1921 26 25 1939-1940 28 10 1992-1993 26 25 1886-1887 28 10 1956-1957 26 25 1887-1888 28 10 1940-1941 30 24 1969-1970 28 10 1932-1933 30 24 1958-1959 28 10 1923-1924 30 24 1891-1892 28 10 1912-1913 33 23 1961-1962 34 11 1996-1997 33 23 1900-1901 34 11 1994-1995 35 22 2003-2004 34 11 1971-1972 35 22 1947-1948 34 11 1950-1951 35 22 1915-1916 34 11 1938-1939 38 21 1970-1971 39 12 1972-1973 38 21 1968-1969 39 12 1959-1960 38 21 1965-1966 39 12 1954-1955 38 21 1898-1899 39 12 1937-1938 38 21 1878-1879 39 12 1914-1915 43 20 1981-1982 39 12 1907-1908 43 20 1966-1967 39 12 1897-1898 43 20 1964-1965 39 12 1893-1894 43 20 1957-1958 47 13 1946-1947 43 20 1945-1946 47 13 1941-1942 43 20 1942-1943 47 13 1924-1925 43 20 1922-1923 47 13 1888-1889 43 20 1916-1917 51 14 2009-2010 43 20 1910-1911 51 14 2000-2001 43 20 1902-1903 51 14 1988-1989 43 20 1899-1900 51 14 1953-1954 54 19 2010-2011 51 14 1927-1928 54 19 1993-1994 51 14 1905-1906 54 19 1963-1964 57 15 1998-1999 54 19 1895-1896 57 15 1975-1976 54 19 1883-1884 57 15 1967-1968 59 18 2008-2009 57 15 1955-1956 59 18 1987-1988 57 15 1943-1944 59 18 1934-1935 57 15 1929-1930 59 18 1896-1897 57 15 1926-1927 59 18 1885-1886 57 15 1925-1926 64 17 2006-2007 57 15 1921-1922 64 17 2004-2005 57 15 1875-1876 64 17 1989-1990 67 16 1999-2000 64 17 1985-1986 67 16 1973-1974 64 17 1984-1985 67 16 1913-1914 64 17 1909-1910 67 16 1882-1883 70 16 1999-2000 71 17 2006-2007 70 16 1973-1974 71 17 2004-2005 70 16 1913-1914 71 17 1989-1990 70 16 1882-1883 71 17 1985-1986 74 15 1998-1999 71 17 1984-1985 74 15 1975-1976 71 17 1909-1910 74 15 1967-1968 77 18 2008-2009 74 15 1955-1956 77 18 1987-1988 74 15 1943-1944 77 18 1934-1935 74 15 1929-1930 77 18 1896-1897 74 15 1926-1927 77 18 1885-1886 74 15 1925-1926 82 19 2010-2011 74 15 1921-1922 82 19 1993-1994 74 15 1875-1876 82 19 1963-1964 84 14 2009-2010 82 19 1895-1896 84 14 2000-2001 82 19 1883-1884 84 14 1988-1989 87 20 1981-1982 84 14 1953-1954 87 20 1966-1967 84 14 1927-1928 87 20 1964-1965 84 14 1905-1906 87 20 1957-1958 90 13 1946-1947 87 20 1945-1946 90 13 1941-1942 87 20 1942-1943 90 13 1924-1925 87 20 1922-1923 90 13 1888-1889 87 20 1916-1917 94 12 1972-1973 87 20 1910-1911 94 12 1959-1960 87 20 1902-1903 94 12 1954-1955 87 20 1899-1900 94 12 1937-1938 98 21 1970-1971 94 12 1914-1915 98 21 1968-1969 94 12 1907-1908 98 21 1965-1966 94 12 1897-1898 98 21 1898-1899 94 12 1893-1894 98 21 1878-1879 102 11 1996-1997 103 22 2003-2004 102 11 1994-1995 103 22 1947-1948 102 11 1971-1972 103 22 1915-1916 102 11 1950-1951 106 23 1961-1962 102 11 1938-1939 106 23 1900-1901 107 10 1992-1993 108 24 1969-1970 107 10 1956-1957 108 24 1958-1959 107 10 1940-1941 108 24 1891-1892 107 10 1932-1933 111 25 1944-1945 107 10 1923-1924 111 25 1939-1940 107 10 1912-1913 111 25 1886-1887 113 9 2012-2013 111 25 1887-1888 113 9 1920-1921 115 26 2002-2003 115 8 2007-2008 115 26 1979-1980 115 8 1991-1992 115 26 1978-1979 115 8 1986-1987 118 27 1983-1984 115 8 1982-1983 119 28 1911-1912 115 8 1951-1952 119 28 1906-1907 115 8 1949-1950 119 28 1894-1895 115 8 1928-1929 122 29 1962-1963 115 8 1890-1891 122 29 1933-1934 115 8 1889-1890 124 30 1980-1981 124 7 1930-1931 124 30 1960-1961 124 7 1908-1909 126 31 1901-1902 124 7 1881-1882 127 32 1995-1996 124 7 1879-1880 128 33 1919-1920 124 7 1877-1878 129 34 1880-1881 129 6 2005-2006 130 35 1935-1936 129 6 1990-1991 130 35 1892-1893 129 6 1974-1975 130 35 1876-1877 129 6 1948-1949 133 36 1976-1977 129 6 1936-1937 133 36 1917-1918 134 4 2011-2012 133 36 1904-1905 134 4 1952-1953 133 36 1874-1875 134 4 1931-1932 137 39 1903-1904 134 4 1918-1919 138 44 1884-1885 138 3 2001-2002 139 45 1977-1978 139 1 1997-1998 Link to comment Share on other sites More sharing options...
Sophisticated Skeptic Posted January 27, 2014 Share Posted January 27, 2014 ^ the statistician Link to comment Share on other sites More sharing options...
NJ_Ken Posted January 27, 2014 Share Posted January 27, 2014 I want to be clear that I am NOT making an argument for or against climate change, human-induced or otherwise. While I, like the rest of you, have strong opinions on the subject, those debates are for the climate change forum, not here. Having said that, it is interesting to note that when it comes to a measure of the severity of seasonal cold (i.e. number of days in a winter season that stayed below freezing) and a measure of the severity of shorter term cold snaps (number of consecutive days below freezing), the last 25 years are woefully underrepresented. Out of the top 50 seasons for number of days that stayed below freezing, only three of them (95-96, 02-03, 03-04) came in the past 25 years. Out of the 28 longest stretches of below freezing temperatures only 3 came in the past 25 years (and December 1989 just slipped in under the wire at that). Even if we assume this winter will be represented in both categories, that is still a small number. Link to comment Share on other sites More sharing options...
gakmsg Posted January 27, 2014 Share Posted January 27, 2014 I want to be clear that I am NOT making an argument for or against climate change, human-induced or otherwise. While I, like the rest of you, have strong opinions on the subject, those debates are for the climate change forum, not here. Having said that, it is interesting to note that when it comes to a measure of the severity of seasonal cold (i.e. number of days in a winter season that stayed below freezing) and a measure of the severity of shorter term cold snaps (number of consecutive days below freezing), the last 25 years are woefully underrepresented. Out of the top 50 seasons for number of days that stayed below freezing, only three of them (95-96, 02-03, 03-04) came in the past 25 years. Out of the 28 longest stretches of below freezing temperatures only 3 came in the past 25 years (and December 1989 just slipped in under the wire at that). Even if we assume this winter will be represented in both categories, that is still a small number. Drove from the airport to western Montgomery county last night around 10 pm. Never ceases to amaze me - 30 degrees at PHL, 21 degrees at home.... always ~10 degrees cooler when its clear / not cloudy. Surely, data shown is actual measurements and not adjusted for heat island effect. Pre- concrete and asphalt, I'm sure that when it was super cold, under a dome of high pressure, the temp differential would not be as consistently large across just 30 miles distance. Measurements from PHL over 150 years must be impacted. Link to comment Share on other sites More sharing options...
famartin Posted January 27, 2014 Share Posted January 27, 2014 Keep in mind that the heat island effect is considerably less during daylight than at night, so this particular element (consecutive hours below freezing) is not as likely to be impacted. Link to comment Share on other sites More sharing options...
Absolute Humidity Posted January 27, 2014 Share Posted January 27, 2014 About a week solid frozen, below 32 until today. Link to comment Share on other sites More sharing options...
NJ_Ken Posted January 27, 2014 Share Posted January 27, 2014 Drove from the airport to western Montgomery county last night around 10 pm. Never ceases to amaze me - 30 degrees at PHL, 21 degrees at home.... always ~10 degrees cooler when its clear / not cloudy. Surely, data shown is actual measurements and not adjusted for heat island effect. Pre- concrete and asphalt, I'm sure that when it was super cold, under a dome of high pressure, the temp differential would not be as consistently large across just 30 miles distance. Measurements from PHL over 150 years must be impacted. I agree to an extent, but a couple of points should be made. Official Philadelphia temperature records have been taken at PHL since (I think) 1940. Before that, official records were taken a various locations in Center City. I would submit that PHL's location (essentially at sea level on the banks of a large tidal river that rarely freezes) rather than the concrete and tarmac there have a greater impact on temperatures. Yes, there is undoubtedly more concrete and tarmac at PHL today than there was in 1940 and this certainly could explain some things... for example, this could be a partial explanation for the dearth of below 0 F temperatures at PHL in recent decades since the "heat island" effect is typically more pronounced at night and that could be just enough on the coldest nights to keep those temperatures above 0 F. However, the "below freezing" records we are discussing here are mostly about daytime high temperatures (because 99% of the time, the high temperature occurs during the afternoon) and the heat island effect is less pronounced during the day. It also doesn't explain why so many of the "below freezing" records above pre-date 1940 when temperatures were taken in Center City which, even 140 years ago (when official records commenced at Philadelphia), was already a concrete and masonry jungle subject to the heat island effect. Again, I am not trying to make some larger point here, political or otherwise. I was just pointing out what we already know, that the data above is just another measure of how wintertime temperatures in Philadelphia have been generally warmer in recent years. Now, if one wants to debate the reasons for that... or whether the temperatures at a single location on this entire rather large planet are in any way meaningful to prove or disprove anything, well, those are topics for the climate change forum. Link to comment Share on other sites More sharing options...
famartin Posted January 27, 2014 Share Posted January 27, 2014 I agree to an extent, but a couple of points should be made. Official Philadelphia temperature records have been taken at PHL since (I think) 1940. Before that, official records were taken a various locations in Center City. I would submit that PHL's location (essentially at sea level on the banks of a large tidal river that rarely freezes) rather than the concrete and tarmac there have a greater impact on temperatures. FYI, the elevation difference between PHL and the old Post Office in Center City (where the office was for many years) is less than 30 feet. PHL is 8 feet while the post office is about 36 feet. Link to comment Share on other sites More sharing options...
uncle W Posted January 27, 2014 Share Posted January 27, 2014 Rank Number Season Rank Number Season1 1 1997-1998 1 45 1977-1978 2 3 2001-2002 2 44 1884-1885 3 4 2011-2012 3 39 1903-1904 3 4 1952-1953 4 36 1976-1977 3 4 1931-1932 4 36 1917-1918 3 4 1918-1919 4 36 1904-1905 7 6 2005-2006 4 36 1874-1875 7 6 1990-1991 8 35 1935-1936 7 6 1974-1975 8 35 1892-1893 7 6 1948-1949 8 35 1876-1877 7 6 1936-1937 11 34 1880-1881 12 7 1930-1931 12 33 1919-1920 12 7 1908-1909 13 32 1995-1996 12 7 1881-1882 14 31 1901-1902 12 7 1879-1880 15 30 1980-1981 12 7 1877-1878 15 30 1960-1961 17 8 2007-2008 17 29 1962-1963 17 8 1991-1992 17 29 1933-1934 17 8 1986-1987 19 28 1911-1912 17 8 1982-1983 19 28 1906-1907 17 8 1951-1952 19 28 1894-1895 17 8 1949-1950 22 27 1983-1984 17 8 1928-1929 23 26 2002-2003 17 8 1890-1891 23 26 1979-1980 17 8 1889-1890 23 26 1978-1979 26 9 2012-2013 26 25 1944-1945 26 9 1920-1921 26 25 1939-1940 28 10 1992-1993 26 25 1886-1887 28 10 1956-1957 26 25 1887-1888 28 10 1940-1941 30 24 1969-1970 28 10 1932-1933 30 24 1958-1959 28 10 1923-1924 30 24 1891-1892 28 10 1912-1913 33 23 1961-1962 34 11 1996-1997 33 23 1900-1901 34 11 1994-1995 35 22 2003-2004 34 11 1971-1972 35 22 1947-1948 34 11 1950-1951 35 22 1915-1916 34 11 1938-1939 38 21 1970-1971 39 12 1972-1973 38 21 1968-1969 39 12 1959-1960 38 21 1965-1966 39 12 1954-1955 38 21 1898-1899 39 12 1937-1938 38 21 1878-1879 39 12 1914-1915 43 20 1981-1982 39 12 1907-1908 43 20 1966-1967 39 12 1897-1898 43 20 1964-1965 39 12 1893-1894 43 20 1957-1958 47 13 1946-1947 43 20 1945-1946 47 13 1941-1942 43 20 1942-1943 47 13 1924-1925 43 20 1922-1923 47 13 1888-1889 43 20 1916-1917 51 14 2009-2010 43 20 1910-1911 51 14 2000-2001 43 20 1902-1903 51 14 1988-1989 43 20 1899-1900 51 14 1953-1954 54 19 2010-2011 51 14 1927-1928 54 19 1993-1994 51 14 1905-1906 54 19 1963-1964 57 15 1998-1999 54 19 1895-1896 57 15 1975-1976 54 19 1883-1884 57 15 1967-1968 59 18 2008-2009 57 15 1955-1956 59 18 1987-1988 57 15 1943-1944 59 18 1934-1935 57 15 1929-1930 59 18 1896-1897 57 15 1926-1927 59 18 1885-1886 57 15 1925-1926 64 17 2006-2007 57 15 1921-1922 64 17 2004-2005 57 15 1875-1876 64 17 1989-1990 67 16 1999-2000 64 17 1985-1986 67 16 1973-1974 64 17 1984-1985 67 16 1913-1914 64 17 1909-1910 67 16 1882-1883 70 16 1999-2000 71 17 2006-2007 70 16 1973-1974 71 17 2004-2005 70 16 1913-1914 71 17 1989-1990 70 16 1882-1883 71 17 1985-1986 74 15 1998-1999 71 17 1984-1985 74 15 1975-1976 71 17 1909-1910 74 15 1967-1968 77 18 2008-2009 74 15 1955-1956 77 18 1987-1988 74 15 1943-1944 77 18 1934-1935 74 15 1929-1930 77 18 1896-1897 74 15 1926-1927 77 18 1885-1886 74 15 1925-1926 82 19 2010-2011 74 15 1921-1922 82 19 1993-1994 74 15 1875-1876 82 19 1963-1964 84 14 2009-2010 82 19 1895-1896 84 14 2000-2001 82 19 1883-1884 84 14 1988-1989 87 20 1981-1982 84 14 1953-1954 87 20 1966-1967 84 14 1927-1928 87 20 1964-1965 84 14 1905-1906 87 20 1957-1958 90 13 1946-1947 87 20 1945-1946 90 13 1941-1942 87 20 1942-1943 90 13 1924-1925 87 20 1922-1923 90 13 1888-1889 87 20 1916-1917 94 12 1972-1973 87 20 1910-1911 94 12 1959-1960 87 20 1902-1903 94 12 1954-1955 87 20 1899-1900 94 12 1937-1938 98 21 1970-1971 94 12 1914-1915 98 21 1968-1969 94 12 1907-1908 98 21 1965-1966 94 12 1897-1898 98 21 1898-1899 94 12 1893-1894 98 21 1878-1879 102 11 1996-1997 103 22 2003-2004 102 11 1994-1995 103 22 1947-1948 102 11 1971-1972 103 22 1915-1916 102 11 1950-1951 106 23 1961-1962 102 11 1938-1939 106 23 1900-1901 107 10 1992-1993 108 24 1969-1970 107 10 1956-1957 108 24 1958-1959 107 10 1940-1941 108 24 1891-1892 107 10 1932-1933 111 25 1944-1945 107 10 1923-1924 111 25 1939-1940 107 10 1912-1913 111 25 1886-1887 113 9 2012-2013 111 25 1887-1888 113 9 1920-1921 115 26 2002-2003 115 8 2007-2008 115 26 1979-1980 115 8 1991-1992 115 26 1978-1979 115 8 1986-1987 118 27 1983-1984 115 8 1982-1983 119 28 1911-1912 115 8 1951-1952 119 28 1906-1907 115 8 1949-1950 119 28 1894-1895 115 8 1928-1929 122 29 1962-1963 115 8 1890-1891 122 29 1933-1934 115 8 1889-1890 124 30 1980-1981 124 7 1930-1931 124 30 1960-1961 124 7 1908-1909 126 31 1901-1902 124 7 1881-1882 127 32 1995-1996 124 7 1879-1880 128 33 1919-1920 124 7 1877-1878 129 34 1880-1881 129 6 2005-2006 130 35 1935-1936 129 6 1990-1991 130 35 1892-1893 129 6 1974-1975 130 35 1876-1877 129 6 1948-1949 133 36 1976-1977 129 6 1936-1937 133 36 1917-1918 134 4 2011-2012 133 36 1904-1905 134 4 1952-1953 133 36 1874-1875 134 4 1931-1932 137 39 1903-1904 134 4 1918-1919 138 44 1884-1885 138 3 2001-2002 139 45 1977-1978 139 1 1997-1998 thanks Ray!... Link to comment Share on other sites More sharing options...
NJ_Ken Posted January 28, 2014 Share Posted January 28, 2014 FYI, the elevation difference between PHL and the old Post Office in Center City (where the office was for many years) is less than 30 feet. PHL is 8 feet while the post office is about 36 feet. Good catch. In addition to the elevation, in my mind's eye, I was picturing the Delaware River (and the associated marshland that surrounds much of PHL) having a large impact on temperatures, but that is probably as much about my personal biases coming into play than it is reality. Sure, if the River is unfrozen, its impact on temperatures could mean a degree or two added warmth on the coldest nights, but, heck, even the Atlantic Ocean does not, for example, impact ACY that much on good radiational cooling nights, and ACY probably isn't too much further from the Atlantic than PHL is from the Delaware. Even a few weeks ago, I believe ACY went below 0 F (or at least got closer than PHL) on one of those cold nights. Link to comment Share on other sites More sharing options...
Maximum lawman Posted January 28, 2014 Share Posted January 28, 2014 Good catch. In addition to the elevation, in my mind's eye, I was picturing the Delaware River (and the associated marshland that surrounds much of PHL) having a large impact on temperatures, but that is probably as much about my personal biases coming into play than it is reality. Sure, if the River is unfrozen, its impact on temperatures could mean a degree or two added warmth on the coldest nights, but, heck, even the Atlantic Ocean does not, for example, impact ACY that much on good radiational cooling nights, and ACY probably isn't too much further from the Atlantic than PHL is from the Delaware. Even a few weeks ago, I believe ACY went below 0 F (or at least got closer than PHL) on one of those cold nights. Moral of this thread: don't argue with Ray. Link to comment Share on other sites More sharing options...
KamuSnow Posted January 28, 2014 Share Posted January 28, 2014 Good catch. In addition to the elevation, in my mind's eye, I was picturing the Delaware River (and the associated marshland that surrounds much of PHL) having a large impact on temperatures, but that is probably as much about my personal biases coming into play than it is reality. Sure, if the River is unfrozen, its impact on temperatures could mean a degree or two added warmth on the coldest nights, but, heck, even the Atlantic Ocean does not, for example, impact ACY that much on good radiational cooling nights, and ACY probably isn't too much further from the Atlantic than PHL is from the Delaware. Even a few weeks ago, I believe ACY went below 0 F (or at least got closer than PHL) on one of those cold nights. At PHL, I think the location can make a difference under the right conditions. Normally at my location the morning low this winter has averaged about 2 to 4 degrees colder than KPHL. On Sat. Jan 4th, the coldest morning of the 1st cold snap - the low at KPHL was 8F, while here it was 2F. I looked at the hourly stats for that night and around 4 am a light wind shifted to the south (at KPHL), (the Delaware River is about 1/2 mile south of the tower), and that appears to have been the end of the temp. drop for the night, while out here the low was around 7 am, which you would expect. The sky conditions were similar, i.e., some clouds but not a solid cloud deck. ACY is a little further removed from water, but more important I believe is that the surroundings to the west and north are much less developed. Link to comment Share on other sites More sharing options...
famartin Posted January 28, 2014 Share Posted January 28, 2014 Good catch. In addition to the elevation, in my mind's eye, I was picturing the Delaware River (and the associated marshland that surrounds much of PHL) having a large impact on temperatures, but that is probably as much about my personal biases coming into play than it is reality. Sure, if the River is unfrozen, its impact on temperatures could mean a degree or two added warmth on the coldest nights, but, heck, even the Atlantic Ocean does not, for example, impact ACY that much on good radiational cooling nights, and ACY probably isn't too much further from the Atlantic than PHL is from the Delaware. Even a few weeks ago, I believe ACY went below 0 F (or at least got closer than PHL) on one of those cold nights. Well, keep in mind ACY is 10 miles inland. PHL *is* much closer to the Delaware River than ACY is to the back bays, let alone the ocean. Link to comment Share on other sites More sharing options...
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