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RodneyS

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About RodneyS

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  • Four Letter Airport Code For Weather Obs (Such as KDCA)
    KIAD
  • Gender
    Male
  • Location:
    Oak Hill, VA

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  1. RodneyS

    Our region's extreme run

    While DCA could not match BWI's record-breaking July 2018 precipitation, the 9.73 inches recorded there was 4th on the all-time DC July list, and the most since the record 11.06 inches in July 1945. Also, the May-July 2018 total of 23.67 inches at DCA was third on the all-time list for those three calendar months, and the most in 129 years. Only May-July 1889, at 23.83 inches, and May-July 1886, at 27.98 inches, had more precipitation in those three months.
  2. DCA _ NYC _ BOS ___ ORD _ ATL _ IAH ___ DEN _ PHX _ SEA 1.0 1.7 2.9 2.2 -1.3 -0.1 1.7 -0.9 -0.1
  3. DCA _ NYC _ BOS ___ ORD _ ATL _ IAH ___ DEN _ PHX _ SEA 2.0 1.0 1.5 2.0 0.0 1.7 2.7 2.5 2.1
  4. RodneyS

    Our region's extreme run

    And May 2018 has the distinction of being an exceptionally warm, and yet still rainy, month in DC. Average temperature of 72.4 degrees at DCA places it third on the all-time DC list behind only 2015 (73.2) and 1991 (73.0). Further, the warm-up from April 2018 was 17.5 degrees, second only to April-May 1911 (18.8 degrees). And yet precipitation was 8.73 inches, which is 6th on the all-time DC May list (May 1953 is # 1, at 10.69 inches).
  5. DCA _ NYC _ BOS ___ ORD _ ATL _ IAH ___ DEN _ PHX _ SEA -0.8 -1.4 -1.3 -0.4 -0.8 1.8 4.8 3.0 0.4
  6. RodneyS

    Our region's extreme run

    You're on to something. May 12-19, 2018 was indeed the first time in DC weather history that eight straight days each recorded at least 0.15" of precipitation. The previous record for that amount or more was seven straight days, set in July 1938 and equaled in July 1941; see http://xmacis.rcc-acis.org/#. Click on that link, then select "Single Station" and click on "Consecutive Days." For "Criteria" select "Precipitation" then type in (more or equal to) "0.15." Then select the "Washington Area" station and click "Go." As I just posted to an article on the Washington Post's Capital Weather Gang: "Rainy to be sure, but to put things in perspective, DC's record single-day rainfall is 6.39 inches, on August 23, 1933. More recently, DCA recorded 9.08 inches during the five-day period September 22-26, 1975."
  7. RodneyS

    Our region's extreme run

    I have just discovered that the above statement is not true for 0.4", as only 2011, 1975, and 1937 also had 5-day streaks of at least 0.4 inches. However, I would have thought that the statement would have more logically read: "It has been an unusually wet pattern over the last week. For DCA (Reagan National), there has been at least 0.4" of rain each of the last 7 days. This is the longest streak on record. The previous longest was 5 days in 2011, 1975, and 1937. Precipitation records date back to 1871."
  8. RodneyS

    Our region's extreme run

    You can view the May 2018 daily precipitation totals at DCA here under "Preliminary Monthly Climate Data" (Column 7 "WTR")-- https://w2.weather.gov/climate/index.php?wfo=lwx
  9. RodneyS

    Our region's extreme run

    The week of Sunday, May 13, 2018 through Saturday, May 19, 2018 saw at least 0.4 inches of precipitation at DCA each of those seven days. Previously, no more than five consecutive days in DC weather history recorded at least 0.4 inches each day.
  10. DCA _ NYC _ BOS __ ORD _ ATL _ IAH ___ DEN _ PHX _ SEA 1.5 1.1 1.5 -0.3 0.0 0.7 2.0 2.4 2.6 Highest Temperatures: DCA: 97° NYC: 96° BOS: 95° ORD: 94° ATL: 96° IAH: 101° DEN: 100° PHX: 117° SEA: 89°
  11. RodneyS

    April Mid/Long Range & Disco

    Thanks for that information. It is remarkable what can be found, but also interesting that snow was not recorded for so many years after official weather recordkeeping began.
  12. RodneyS

    April Mid/Long Range & Disco

    I just found this, from the April 30, 1874 Reading (PA) Times: "BALTIMORE, April 29. -- A brisk snow storm prevailed here this morning from about 4 o'clock until after ten, falling to the depth of 3 or 4 inches." The temperature range in Baltimore that day was 33 to 46, with 0.49 inches of precipitation. So, DC was colder, with more precipitation, which makes me wonder if it did not receive even more snow. Of course, if so, I would have thought that would have made the Reading Times account.
  13. RodneyS

    April Mid/Long Range & Disco

    Just saw this. Yes, Dulles received 0.2 inches of snow on April 4, 1990, 2.7 inches on April 6, 1990, and 1.1 inches on April 7, 1990. Presumably, these were two distinct events -- 0.2 inches on the 4th and 3.8 inches on the 6th-7th. In the pre-airport age in DC, there was 0.4 inches on April 6, 1907, 0.4 inches on April 7, 1907 (combined 0.8 inches) and 0.6 inches on April 9, 1907. And, perhaps the toughest DC record to break: After 0.5 inches of snow fell on April 5, 1898, another 0.5 inches fell on April 28, 1898. (The temperature range on the latter day was 33 to 43, with 0.29 inches of precipitation.) However, 1874 might well be the champion for two April snows and the latest April snow ever, if official DC snow records had been kept at that time. April 1, 1874 had a temperature range of just 29 to 35, with 0.09 inches of precipitation; and April 29, 1874, had a temperature range of only 30 (latest DC freeze ever) to 45, with 0.84 inches of precipitation. So, I would guess that snow fell on both of those days, and perhaps the latter day even saw an inch or two. Maybe an old newspaper might mention snow on that day.
  14. RodneyS

    Mid-Atlantic winter 2017-18 snowfall contest

    Depends what assumptions you make, but thus far IAD has never had measurable snow later than April 12th, when it received an inch in 1973. However, it did not exist in 1898, when Baltimore received a tenth of an inch, and DC received half an inch, on April 28th.
  15. DCA _ NYC _ BOS __ ORD _ ATL _ IAH ___ DEN _ PHX _ SEA -1.7 -2.4 -1.9 -5.0 0.2 0.9 1.0 3.2 -1.0
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