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Our region's extreme run


MN Transplant
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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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  • 2 weeks later...
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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  • 5 weeks later...
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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On 1/1/2016 at 11:18 AM, Ian said:

Looks like this should go down as the third warmest year on record for DC*.

 

2012    61.5
1991    60.2
2015    60.1
1998    60
1990    60

 

 

*you know the story

2016 will be the new # 2 in DC, at 60.3 degrees (actually 60.4 if you compute the true 366-day average, rather than averaging the 12 monthly averages).  And IAD will also be #2 all-time, at 57.1 (vs. 57.9 in 2012).

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1 hour ago, PrinceFrederickWx said:

Record high of 70 tied today at BWI.

No contest at Dulles, as today's high of 70 easily eclipsed the previous record of 63 set in 1995.  DCA's 72 didn't break the 1890 record of 76, but was the warmest January 12th in DC since that year. 

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1 hour ago, RodneyS said:

No contest at Dulles, as today's high of 70 easily eclipsed the previous record of 63 set in 1995.  DCA's 72 didn't break the 1890 record of 76, but was the warmest January 12th in DC since that year. 

The high minimum records at both airports should also fall by day's end.  At Dulles, the current record is just 38, set in 2007.  Today's low there is currently 49, and is very likely to hold. In DC, the current record is 47, set in 1890.  Today's low at DCA is currently 51, and is also very likely to hold.

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  • 3 weeks later...
On 1/31/2016 at 6:43 PM, RodneyS said:

And January wasn't cold.  It was cool.  However the 34.9 degree average temperature at DCA, while only 0.3 degrees below the January 1871-2016 DC average of 35.2 degrees, was 16.3 degrees below the December 2015 average DCA temperature of 51.2 degrees.  That decline represented the greatest one-month change from December in DC history.  The previous record-holder was January 1912, which declined 16.0 degrees from December 1911. (The largest increase was January 1990, which was up 15.7 degrees from December 1989.)

This January was a different story at DCA, rising to an average temperature of 42.1 degrees vs 41.8 in December 2016.  The January average was 12th warmest of all-time in DC, and was 6.1 degrees above the 1981-2010 normal.

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4 hours ago, MN Transplant said:

DCA 73 vs the record of 64.  I think Ian on twitter noted the other day that 64 was tied for the lowest individual daily high temp on record at DCA.  Now Dec 17th stands alone.

Yes indeed.  It's interesting that the lowest DC daily January maximum is quite a bit higher than either December's or February's (now 65, on February 3, 1927), at a relatively balmy 68 degrees (on January 3rd, in both 2000 and 2004).  At Dulles, it's a different story, as January 10th (2002) is the lowest daily maximum temperature on record, at a mere 58 degrees.  Today's high of 72 at IAD easily broke the previous February 7th record of 65 degrees, but the lowest February daily maximum there remains 63 (in both 1990 and 2001).  In December, the lowest IAD daily maximum is also 63, set on December 19th (1967).

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6 hours ago, MN Transplant said:

DCA 73 vs the record of 64.  I think Ian on twitter noted the other day that 64 was tied for the lowest individual daily high temp on record at DCA.  Now Dec 17th stands alone.

Yeah this was a low hanging fruit record at BWI too- appears to be the lowest. Although a high of 72 would break or tie on many other days in February too so it's still an impressive record. 

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On 2/8/2017 at 4:24 PM, RodneyS said:

New records also at DCA (74) and IAD (71).

No record area highs today (both set in 2011 -- 77 at DCA and 74 at IAD), but IAD had an interesting distinction:  The 47-degree temperature spread between the morning low of 25 and the afternoon high of 72 was the greatest there since April 8, 1995, when the temperature range was 34 to 81.

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Legit shot at hottest February ever for BWI. As of yesterday the departure was +7.0 which would be tied for 4th with 1932. That will go way up after today and tomorrow. Question is how much Sunday/Monday will knock it down.

+8.3 is the magic number, which is where the hottest February (1976) finished.

We have five 70+ highs as of today; tomorrow will be an easy win so that ties it at six. Saturday is questionable since the forecast is a high of 68 but if we can overperform a bit we can break the record.

Only two degrees away from getting the daily record high today too.

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4 hours ago, PrinceFrederickWx said:

Hottest February ever just clinched today!

Most number of 70+ high days (7) this month too!

Here are the February 2017 average temperatures for DCA and IAD:  DCA -- 47.7 degrees vs previous DC record high of 46.9 in 1976.  IAD -- 44.8 vs. previous record high of 42.2 in 1990. IAD also broke its meteorological winter average high temperature record of 40.0 set in 2011-12, with a Dec-Feb average of 40.7.  Finally, DCA broke its previous meteorological winter average high temperature record of 43.4 set in 2011-12, with an average of 43.8, but did not break the all-time DC record of 44.7 set in 1931-32 nor equal the 2nd place DC record of 44.3 established in 1889-90. 

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