Latest update: March 23For daily updates most days around 6 pm EDT:Follow @capital_climate!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs'); March is on track for an average temperature of 42.7°, which would be 4.1° below the long-term average and the coldest since 1993, when…

Latest update: February 28For daily updates most days around 5 pm EST:Follow @capital_climate!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs'); Final February charts:Washington DC daily temperature departures from normal and monthly average to date (click to enlarge):Washington DC daily precipitation and monthly departure from…

From National Weather Service Alaska (click to enlarge):…

Washington DC daily temperature departures and monthly average to date (click to enlarge):Washington DC daily precipitation and monthly departure to date (click to enlarge):CapitalClimate charts from National Weather Service data. Background image from Kevin Ambrose.…

Image (click to enlarge): U.S. temperatures at 3 pm CST, January 19, 2014, from Unisys 9 PM Update: Added Hastings, Broken Bow, Imperial NE and Salina, Russell KSOriginal post:A mid-winter mini-heatwave tied or broke long-standing high temperature records across at…

Images (click to enlarge): December daily record low temperatures for Washington, DC, by year of occurrence; Number of December daily record lows per decade; CapitalClimate charts from National Weather Service dataIf you can remember the last time Washington, DC set…

September 30 Update: September monthly precipitation records have also been set in Oregon at Eugene, Hillsboro, McMinnville (second highest), Portland (downtown and airport), and Salem, as well as at Vancouver, Washington. Details have been added below.Original post:Driven by persistent abnormally…

Images (click to enlarge): Top 10 wettest summers in Philadelphia, CapitalClimate chart from National Weather Service (NWS) data; Philadelphia precipitation percentage of normal for 90 days ending August 12, 2013, from NWSThere's a good reason if the Philadelphia Phanatic is…

Image (click to enlarge): Puerto Rico 24-hour precipitation ending 8 am EDT, July 19, 2013, from National Weather ServiceMidnight Update: The final daily rainfall for San Juan is 9.23", the second highest for any day on record.The year-to-date rainfall total…

Image (click to enlarge): U.S. temperatures at 4 pm EDT, July 15, 2013, from UnisysRecord heat extended from northernmost Maine into eastern Canada on Monday, July 15: - The high temperature at Millinocket of 94° tied the record for the…

Images (click to enlarge): Washington, DC regional radar, 12:49 am EDT, July 12, 2013, from The Weather Channel; 24-hour precipitation ending 8 am EDT, July 13, 2013, for Washington region, from National Weather Service2 PM EDT Update: The 3.88" a…

Image (click to enlarge): U.S. daily high temperatures, June 28, 2013, from Unisys. Note the bright blue area of 120°+.July 1 Update: The 129° at the aptly-named Furnace Creek in Death Valley on June 30 was a new all-time June…

Images (click to enlarge): June total rainfall to date for New York and southern New England from National Weather Service (NWS); 48-hour total precipitation forecast through Friday evening, June 28, from WPC/NWSJune 27 (Thursday), 10:30 PM Update: The 0.23" so…

9 PM CDT Update: The preliminary final high temperature at Goodland was 107°, smashing the old record by 7°. Other records were tied or broken in Arizona, New Mexico, Wyoming, Colorado, Nebraska, and Kansas. Location Record Previous Date AZ Winslow…

June 8, 10 AM Update: Added Salisbury, Wilmington, Allentown, Islip, Massena, Boston, Providence. Updated totals through midnight.10 PM EDT Update: Added Richmond, New Bern, Hartford, Bridgeport, Worcester. Updated totals through 8 pm (10 pm for CT and MA).Original post:Heavy rainfall…

Image (click to enlarge): U.S. daily high temperatures for May 14, 2013, from UnisysWhile Mid Atlantic residents were complaining about the unseasonable cold temperatures on Tuesday, heat records were being crushed in the Northern Plains and upper Midwest. As shown…

One year after heat records smashed cold records by a ratio of over 35 to 1, preliminary data from the National Climatic Data Center (NCDC) show that new daily low temperature records in the U.S. outnumbered high temperature records by…

* since 20015:30 PM Update: The preliminary high for the day was 79° at 3 pm EDT.Original Post:With a noon temperature of 70°, Washington is well on its way to the first 75° or higher temperature of the year by…

March 2013 has closed out the record books with a monthly high temperature in Washington of 63°. This is the coldest high for March since the 58° in 1958. It's only the second time Washington has failed to reach 65°…

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Denizens of the DMV were complaining about the early-spring cold this March 21, but the chill was nowhere near the historical extremes for this date or any other date through the end of the month. Although the high for the…

The climatological average for March snowfall in Washington is just 1.3", so significant snowfalls in the first month of meteorological spring are rare. With the bust of the current "Snowquester", it's likely that 2013 will add to a string of…

8 PM CST February 26 Update: Map updated with final totals.8 PM CST Update: The Amarillo snow total of 19" is the third heaviest for any storm on record:19 inches of snow at NWS #Amarillo. 2nd most snow in a…

The maximum intensity for the developing Midwest blizzard is nearly 2 days away, but a major forecast model is predicting mid-atmospheric pressures at least as low as any observed during February in the region since systematic upper-air observations began in…

February 26, 9 AM CST Update: The Wichita daily record snowfall of 4.8" yesterday, plus 2" so far today, brings the monthly total to 21", which breaks the record.February 25, 8 PM CST Update: The heaviest snow appears to be…