The number of of 90ºF days in the US is down 20% since the 1930s, with 2013 having the fewest in over a century. 2013 totals are not final, but are unlikely to pass 2009, which was the second mildest year.
Obama had to time his sweating speech very carefully in order to catch a hot day this summer.
Steve: I assume that this is only all HCN stations continuously in operation? In other words, the same number of stations in each year?
OT Steve, Seems NOAA has shut their N Hem Temps page down? It has not been working for days.
Also looking at this Ice concentration loop map and the Sea Ice is expanding in coverage? http://www7320.nrlssc.navy.mil/hycomARC/navo/arcticice_nowcast_anim30d.gif
NOAA’s link to now working temp obs N hem
http://www.esrl.noaa.gov/psd/map/images/fnl/sfctmp_01.fnl.html
Full site
http://www.esrl.noaa.gov/psd/map/wx/current.shtml
Of the 6 years with less hot days 3 were after 2007 and the very low mark of 1992 is obviously due to Pinatubo eruption. The recent trend is obviously due to solar radiation levels (as evidenced by the minima in 2008,2009 and this year), but the strong decline from 1930’s to 1950 is probably due to PDO+AMO forcing (normal decadal oscillation)
http://icecap.us/images/uploads/ARCTIC12.jpg
Each and every station in Texas and across the deep South has another 20 or so 90+ degree days left this year.
The odds of reaching 2009 are very close to zero.
Both of our statements will likely come true.