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Our region's extreme run


MN Transplant
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After failing to reach 80 degrees until May 24th, DCA has now recorded eight consecutive maximums in the 80s.  When was the last time that May 24-31 each had maximums in the 80s in DC?  Never since official daily temperature record-keeping began in 1872. The closest previously was in 1911, when all but May 30th had maximums in the 80s.  However, that day reached an even 90. 

Today marked the 15th consecutive day -- May 24-June 7 -- of a maximum in the 80s at DCA. While the streak is likely over, it did, according to my records, break the all-time DC 80s streak for the first half of the year.  I believe that the previous record-holder for that time frame was June 15-28, 1907 (14 days).  The all-time record for consecutive days with a maximum in the 80s, I believe, is August 11-September 1, 2001 (22 days).

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13 hours ago, PrinceFrederickWx said:

Today was the first 100+ day for BWI since July 18, 2012. Today also tied the record high of 100 set in 2010.

Similar picture for both DCA and IAD, as all three area airports recorded an even 100 degrees.  First 100+ at DCA since July 26, 2012, and first at IAD since July 18, 2012. DCA tied the record for July 25th set in 1930 and IAD broke the record of 98 set in 2010.  

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On 7/27/2016 at 9:08 PM, Ian said:

DCA hit 97+ five days in a row... should be it. Ties for the 4th longest stretch of 97+ in DC.

And today marked the 13th consecutive day of at least 90 degrees at DCA, with forecasts tomorrow calling for a high in the mid-80s.  Last year we also "officially" had 13 consecutive 90+ readings (during July 24th-August 5th), but that was right before the DCA temperature sensor was replaced on August 10th, with a reference sensor (psychro-dyne) showing a reading of 1.7 degrees too high on the old sensor.  Prior to that, DCA had 16 straight 90+ readings July 18-August 2, 2011.  The all-time record is 21 straight 90+ readings July 25-August 14, 1980.

.

 

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Blacksburg VA did something yesterday I haven't seen in a while. They tied both their record warmest low and coolest high on same day with a 68 and 71 reading. Big 3 degrees difference, which is also hard to pull off this time of year. They also set a rainfall record for the day with 0.95 inches.

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40 minutes ago, wxdude64 said:

Blacksburg VA did something yesterday I haven't seen in a while. They tied both their record warmest low and coolest high on same day with a 68 and 71 reading. Big 3 degrees difference, which is also hard to pull off this time of year. They also set a rainfall record for the day with 0.95 inches.

That is unique.  Good find.

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Yesterday marked the third consecutive 100 degree or higher reading at DCA.  The only other time that happened in August in DC was the legendary summer of 1930, which saw August 3-5 do it.  If we hit 100 or more today at DCA, that will tie both 1930 (July 19-22) and 2012 (July 5-8) for having the most consecutive days that reached at least 100.   

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29 minutes ago, Ian said:

Think we got too much rain last night. Temp of 82 at 10 would require a pretty huge rise to get to 100. We might get some upper 70s dews tho later.

It's a longshot at this point, as the 10:52 AM DCA temperature is only 83, vs 88 yesterday at that same time.  However, with the old sensor . . . 

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I'm thinking more and more that BWI can pull off a top ten hottest- as of yesterday they were +5.7. If we finished with that departure it would be 7th hottest. Today and tomorrow are going to push that departure even higher. Thurs and Fri look near normal and the weekend and beyond look above average. Of course it could fall apart at the end of the month but its looking good to me now. If it happens, this would be the first back-to-back top ten hottest months since June-July 2010.

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On 8/31/2016 at 10:45 PM, Ian said:

Summer 10-12 is back. :<

For DC...

Most 90 degree days on record in August

2nd hottest August (by one degree on one day of the month)

Hottest July/August

3rd hottest summer

 

Astronomical summer (June 21-September 23, on average) was record-setter at IAD (78.0 vs previous record of 76.8 in 2010) and second at DC/DCA (81.1 vs 81.7 in 1980).   Also, composite summer (June 1-September 23) was record-setter at both (IAD: 77.1 vs  previous record of 76.5 in 2010 and DC/DCA: 80.17 vs previous record of 80.14 in 2010).

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10 hours ago, RodneyS said:

Astronomical summer (June 21-September 23, on average) was record-setter at IAD (78.0 vs previous record of 76.8 in 2010) and second at DC/DCA (81.1 vs 81.7 in 1980).   Also, composite summer (June 1-September 23) was record-setter at both (IAD: 77.1 vs  previous record of 76.5 in 2010 and DC/DCA: 80.17 vs previous record of 80.14 in 2010).

Really impressive/depressing.  Thanks for crunching the numbers.

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5 hours ago, MN Transplant said:

Really impressive/depressing.  Thanks for crunching the numbers.

You're welcome, and as you have noted, the DCA record of 81.7 for the 1980 astronomical summer is suspect, as  it exceeded the IAD temperature of 76.1 by 5.6 degrees.  So, a faulty DCA sensor may have been a significant factor in that record.  

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On 9/23/2016 at 8:58 PM, RodneyS said:

Astronomical summer (June 21-September 23, on average) was record-setter at IAD (78.0 vs previous record of 76.8 in 2010) and second at DC/DCA (81.1 vs 81.7 in 1980).   Also, composite summer (June 1-September 23) was record-setter at both (IAD: 77.1 vs  previous record of 76.5 in 2010 and DC/DCA: 80.17 vs previous record of 80.14 in 2010).

September 2016 was also a record-setter at IAD (73.1 vs previous record of 72.7 in 1998) and tied for third at DC/DCA (76.0 vs 78.2 in 1881, 77.1 in 1980, and 76.0 in 1930).  

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13 hours ago, RodneyS said:

September 2016 was also a record-setter at IAD (73.1 vs previous record of 72.7 in 1998) and tied for third at DC/DCA (76.0 vs 78.2 in 1881, 77.1 in 1980, and 76.0 in 1930).  

I just discovered that the September 2016 DCA average minimum of 68.6 broke the all-time DC record of 68.2 set in 1881.  On the other hand,  the September 2016 DCA average maximum of 83.4 didn't even approach the 1881 record of 88.2.  In fact, this year's September average maximum was slightly below last year's (83.5) and ranks only 13th all-time. 

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On 9/23/2016 at 8:58 PM, RodneyS said:

Astronomical summer (June 21-September 23, on average) was record-setter at IAD (78.0 vs previous record of 76.8 in 2010) and second at DC/DCA (81.1 vs 81.7 in 1980).   Also, composite summer (June 1-September 23) was record-setter at both (IAD: 77.1 vs  previous record of 76.5 in 2010 and DC/DCA: 80.17 vs previous record of 80.14 in 2010).

Meteorological autumn (September 1-November 30) also was a record setter at DC/DCA, with an average temperature of 63.9 degrees vs. the previous record high of 63.3 in 2007.  IAD came up just short, with an average temperature of 60.0 degrees vs. the record high of 60.3 in 2007.

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