TWCCraig Posted January 31, 2014 Share Posted January 31, 2014 Certainly not cold along the coast right now. 27 here currently with very little radiational cooling in the light onshore flow. Overall a solid January with plenty of snow and cold. But the cold is effectively over here for a while 2 miles inland resting at 20. You can see the coastal front on WU. Link to comment Share on other sites More sharing options...
JERSEYSNOWROB Posted January 31, 2014 Share Posted January 31, 2014 Down to 6 degrees in Millville in South Jersey and 6 in Somerville, nj in Somerset county and 4 in Lakehurst in Ocean County. Wow Link to comment Share on other sites More sharing options...
uncle W Posted January 31, 2014 Share Posted January 31, 2014 it looks like the coldest 30 day period is from January 1st to the 30th...It averaged 28.5...This is on par with... 1956-57 27.82008-09 27.91964-65 28.01957-58 28.12010-11 28.1 The last 15 days in January counting today and the first 15 days of February could be colder but that's only a possibility as of now... Link to comment Share on other sites More sharing options...
bluewave Posted January 31, 2014 Author Share Posted January 31, 2014 it looks like the coldest 30 day period is from January 1st to the 30th...It averaged 28.5...This is on par with... 1956-57 27.8 2008-09 27.9 1964-65 28.0 1957-58 28.1 2010-11 28.1 The last 15 days in January counting today and the first 15 days of February could be colder but that's only a possibility as of now... This January had the most days of the group with 40 degree or over highs and single digit lows .................40 days............single digit days........total..... 2014...........12...........................6.....................18 1957...........7............................4.......................11 1965...........11..........................1........................12 2011............5............................1.......................6 It was also an odd January for having cold and single digits the first and last 10 days with mild temperatures during the middle 10. Most of the time the whole month is cold when we have 6+ days with single digits or half of the month is cold and half warm like 2005. But it's unusual to see such a pronounced thaw between the early and late cold in January. Link to comment Share on other sites More sharing options...
Guest Pamela Posted February 1, 2014 Share Posted February 1, 2014 Mean of 28.6 F for Central Park for January 2014 certainly equivalent in my mind to the mean of 25.2 F in January 1883, which was 10th coldest on record...given the urban buildup in the 131 intervening years... Link to comment Share on other sites More sharing options...
TWCCraig Posted February 1, 2014 Share Posted February 1, 2014 Mean of 28.6 F for Central Park for January 2014 certainly equivalent in my mind to the mean of 25.2 F in January 1883, which was 10th coldest on record...given the urban buildup in the 131 intervening years... The mean however at various other locations that are far more undeveloped are still warmer than Jan 1883. FOK avg. around 27F. Link to comment Share on other sites More sharing options...
Guest Pamela Posted February 1, 2014 Share Posted February 1, 2014 The mean however at various other locations that are far more undeveloped are still warmer than Jan 1883. FOK avg. around 27F. You miss my point Craig...I'm not arguing that it is as cold in 2014 overall as it was in 1883...I'm just saying that in terms of 31 days of cold...January 1883 and January 2014 were probably very similar. Link to comment Share on other sites More sharing options...
bluewave Posted February 1, 2014 Author Share Posted February 1, 2014 The mean however at various other locations that are far more undeveloped are still warmer than Jan 1883. FOK avg. around 27F. Yeah, the trend in NYC is very similar to some of the long observation sites out in Suffolk. Link to comment Share on other sites More sharing options...
Guest Pamela Posted February 2, 2014 Share Posted February 2, 2014 Yeah, the trend in NYC is very similar to some of the long observation sites out in Suffolk. Hmmm...in 1900...17 years after the year my initial point was taken out of context (probably unintentionally by Craig)...the population of Suffolk County was 75,000 people...in 2013...the population in that county was 1,5000,000. So no reasonable person could argue against the fact that there was an increasing heat dome out in Suffolk as well. Link to comment Share on other sites More sharing options...
bluewave Posted February 2, 2014 Author Share Posted February 2, 2014 Hmmm...in 1900...17 years after the year my initial point was taken out of context (probably unintentionally by Craig)...the population of Suffolk County was 75,000 people...in 2013...the population in that county was 1,5000,000. So no reasonable person could argue against the fact that there was an increasing heat dome out in Suffolk as well. It looks like the UHI increase since 1900 was responsible for about 1/3 of the total warming in NYC. http://pubs.giss.nasa.gov/docs/2008/2008_Gaffin_etal_1.pdf We analyse historical (1900 – present) and recent (year 2002) data on New York city’s urban heat island (UHI) effect, to characterize changes over time and spatially within the city. The historical annual data show that UHI intensification is responsible for ∼1/3 of the total warming the city has experienced since 1900. The intensification correlates with a significant drop in windspeed over the century, likely due to an increase in the urban boundary layer as Manhattan’s extensive skyline development unfolded. For the current-day, using 2002 data, we calculate the hourly and seasonal strength of the city’s UHI for five different case study areas, including sites in Manhattan, Bronx, Queens and Brooklyn. We find substantial intra-city variation (∼2 °C) in the strength of the hourly UHI, with some locations showing daytime cool islands – i.e., temperatures lower than the average of the distant non-urban stations, while others, at the same time, show daytime heat islands. The variations are not easily explained in terms of land surface characteristics such as building stock, population, vegetation fraction or radiometric surface temperatures from remote sensing. Although it has been suggested that stations within urban parks will underestimate UHI, the Central Park station does not show a significant underestimate, except marginally during summer nights. The intra-city heat island variations in the residential areas broadly correlate with summertime electricity demand and sensitivity to temperature increases. This relationship will have practical value for energy demand management policy, as it will help prioritize areas for UHI mitigation. The upper curve in Fig. 1a is the Central Park record, while the lower curve is the average of the 23 non-urban stations. Figure 1b explicitly shows the temperature offset, Turban–rural (year) between these two historical records. It reveals a growth of the Central Park UHI strength from 2.0 C in 1900 to 2.5 C today. The relative strength of New York’s UHI in 1900, and subsequent modest growth of 0.5 C, is interesting given the intensive increase in urban infrastructure since that time and continu- ing today. Historical photographs show that the building heights around Central Park were quite low in 1900, compared to the tall structures today, with a much greater skyview then (Black 1973). The resulting reduction in skyview over time should lead to UHI enhancement through reduced net longwave cooling (Oke 1986). Given the vast scale of New York’s skyline de- velopment since 1900, one might a priori expect a larger increase than 0.5 C. It is possible though that the Central Park station, located 300 m from the nearest streets, was less impacted by skyview loss over time. Additionally, although New York’s urban landscape and building heights were different, the Manhattan island population in 1900 was even larger (1.85 million persons in 1900) than today (1.54 million in 2000), due to turn-of-century immigration. So to the extent that population is an indicator of UHI strength, the relative 1900 UHI magnitude may be partial- ly understandable. The data in Fig. 1 thus suggest that of the total 1.5 C warming Central Park has experienced over the century, roughly 33% of it was due to an increase in the UHI strength Link to comment Share on other sites More sharing options...
Guest Pamela Posted February 2, 2014 Share Posted February 2, 2014 It looks like the UHI increase since 1900 was responsible for about 1/3 of the total warming in NYC. http://pubs.giss.nasa.gov/docs/2008/2008_Gaffin_etal_1.pdf Hmmm published in the Netherlands...home to the well known Royal Netherlands Meteorological Institute...a veritable hot bed (pardon the pun) of global warming activism & written & researched at Columbia University...where any "anti-progressive" thought has been quietly stifled since Roosevelt (Teddy, not Franklin). The objectivity of the article is quite simply unquestionable! Link to comment Share on other sites More sharing options...
bluewave Posted February 9, 2015 Author Share Posted February 9, 2015 Potential to make the list again like we did during the last 2 winters beginning 2/13. Coldest weeks in NYC since 1960 Week/Average Temperature(F) Below 20 degrees.......................1/6-1/12........1968....12.22/12-2/18......1979....12.71/15-1/21......1994....13.91/20-1/26......1961....15.51/12-1/18.....1977.....15.91/8-1/14........1981....16.412/21-12/27...1989....16.71/18/-1/24......2005....17.11/28-2/3........1961.....17.21/10-1/16......2004.....17.41/12-1/18......1982.....17.6 2/15-2/21.......2015....18.01/18/-1/24.....1976.....18.11/28/-2/3.......1971.....18.21/19-1/25......1970.....18.42/1-2/7..........1996.....18.61/18-1/24.......2003....18.71/23-1/29.......2004....18.91/15-1/21.......1971....19.11/14-1/20......1965.....19.42/5-2/11........1979.....19.5 20 degrees or above ................................................... 1/21-1/27.......2014....20.6 2/4-2/10.........2007....20.9 1/15-1/21.......2009....21.2 1-21-1-27.......2013....21.3 1/2-1/8..........2014....22.6 Link to comment Share on other sites More sharing options...
doncat Posted February 9, 2015 Share Posted February 9, 2015 February 1979 was insanely cold...at my station, the 10 day period from Feb 9th thru 18th averaged 9.6 degrees. Link to comment Share on other sites More sharing options...
uncle W Posted February 9, 2015 Share Posted February 9, 2015 February 1979 was insanely cold...at my station, the 10 day period from Feb 9th thru 18th averaged 9.6 degrees. I remember frozen pipes in buildings that it never happened to before...The farmers almanac nailed Feb/Mar. 1979...it said a warm March will relieve an extra cold February...15-20" of snow fell from the 5th-19th...I got about 8-9" from PD1 in south west Brooklyn... Link to comment Share on other sites More sharing options...
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