Wettest 12-Month Period In 48 States For 3rd Month Straight; 7/8 Wettest Periods In Past 5 Years
(Weather Underground) Topping a remarkable record that was set just a month earlier, the year-long period ending in June was the wettest 12-month span in U.S. records that go back to 1895. For the 48 contiguous U.S. states, precipitation averaged 37.86 over the period from July 2018 to June 2019. The previous record for any 12-month period was 37.68, recorded from June 2018 to May 2019. No other year-long spans on record have averaged more than 37 inches for the entire nation.
Whats more, going back another month, the period from May 2018 to April 2019 recorded 36.20, putting it in third place.
Another period of sustained wetness in 2015-16, including a peak in spring 2015, led to the fourth and fifth wettest year-long spans on record. Sixth place is now held by April 2015 March 2016. Put another way, the six wettest spans among all of the 1494 overlapping year-long spans since January 1895and seven of the eight wettesthave occurred in the last five years. [
]
Another data point: The last two weeks of May were the first in the 19-year history of the weekly U.S. Drought Monitor without any areas flagged as experiencing D2, D3, or D4 drought (severe, extreme, or exceptional). As of July 2, the D2-to-D4 area was a mere 0.59% of the contiguous U.S. No values below 1% had been observed in the history of the monitor prior to March 2019.
EDIT
https://desdemonadespair.net/2019/07/wettest-12-months-in-u-s-history-yet-again.html