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HEAT WAVE 6 now underway....probably will last 5 days


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I believe that the 16-day period encompassing July 18-August 2, 2011 was the hottest such period in DC history, whether measured by maximum temperatures, minimum temperatures, or average temperatures. The respective 16-day averages at DCA were 97.4, 78.8, and 88.1. I believe that the previous hottest 16-day period when measured by high temperatures was July 19-August 3, 1930, which averaged 96.9. I believe that the previous hottest 16-day period when measured by minimum and average temperatures was July 30-August 14, 1980, which averaged 76.4 and 86.1, respectively.

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I believe that the 16-day period encompassing July 18-August 2, 2011 was the hottest such period in DC history, whether measured by maximum temperatures, minimum temperatures, or average temperatures. The respective 16-day averages at DCA were 97.4, 78.8, and 88.1. I believe that the previous hottest 16-day period when measured by high temperatures was July 19-August 3, 1930, which averaged 96.9. I believe that the previous hottest 16-day period when measured by minimum and average temperatures was July 30-August 14, 1980, which averaged 76.4 and 86.1, respectively.

Nice findings. This post prompted me to update my spreadsheet. I can confirm your results, with a couple of tweaks on the lows.

16 day average:

Highs: 97.4° - period ending 8/2/11, previous 96.9 (ending 8/3 & 8/4, 1930)

Lows: 78.9° - period ending 8/3/11, previous 76.9 (ending 8/12/1980)

Average: 88.1° - period ending 8/2/11, previous 86.1 (ending 8/12 & 8/14, 1980)

A maybe more media-friendly two week period (14-day average):

Highs: 97.7° - period ending 8/2/11, previous 97.6 (ending 7/31/30)

Lows: 79.5° - period ending 8/1/11, previous 76.9 (ending 8/12/80)

Average: 88.6° - period ending 8/1/11, previous 86.4 (ending 8/12 & 8/14 1980)

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Nice findings. This post prompted me to update my spreadsheet. I can confirm your results, with a couple of tweaks on the lows.

16 day average:

Highs: 97.4° - period ending 8/2/11, previous 96.9 (ending 8/3 & 8/4, 1930)

Lows: 78.9° - period ending 8/3/11, previous 76.9 (ending 8/12/1980)

Average: 88.1° - period ending 8/2/11, previous 86.1 (ending 8/12 & 8/14, 1980)

A maybe more media-friendly two week period (14-day average):

Highs: 97.7° - period ending 8/2/11, previous 97.6 (ending 7/31/30)

Lows: 79.5° - period ending 8/1/11, previous 76.9 (ending 8/12/80)

Average: 88.6° - period ending 8/1/11, previous 86.4 (ending 8/12 & 8/14 1980)

Thanks for the correction to the 16-day lows and the new two-week figures. I'll quibble with you about the 16-day average, as when carried out to two decimal places, the period ending on August 14, 1980 noses out the period ending on August 12, 1980, 86.13 to 86.09. (I remember that monumental difference as if it were yesterday :lol:). One record that I think is safe is the 22-day average high of 97.4 set during July 19-August 9, 1930. That period featured 11 days that reached at least 100.

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I think so since tomorrow shoudl reach 90 and MOnday's 850 temps would support mid to upper 90s. The 06Z version of the GFS looked warmer than the 12Z version and was above 20C while the latter looks like it is around 18 to 19 C.

Stop it.

Average daily highs are on the downward slide baby. Snowstorm by August 30th?

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Stop it.

Average daily highs are on the downward slide baby. Snowstorm by August 30th?

The model 850 temps keep getting lower each run so tomorrow may only be 95 or so unless it is cloudy. I don't see any monster heat on the models just normal summer stuff as we move on. Let's hope we keep the negative Nao going this winter or it could be ugly. It's too early to really say much yet.

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