24-hour record of 42.00” at Alvin Texas on July 25-26, 1979, was not measured at an official weather site. However, there is inconsistency in the SCEC list in this regard. The reason(s) their list and my list do not completely jibe is that I include some 24-hour records that were not officially measured at a sanctioned COOP or other U.S. You can find their list (but almost exclusively just for each state’s 24-hour record) here. Not all of these are official records recognized by the SCEC (State Climate Extremes Committee).
and Canada” (a Weatherwise magazine publication) and since updated by myself. Ludlum and published in his 1970 booklet “Weather Record Book: U.S. The data was originally compiled by weather historian David M. The recordsīelow is a table showing results of my research into the precipitation records for each state. However, the only state monthly precipitation record officially broken in recent years was in Texas, where Harvey contributed to most of Port Arthur’s August 2017 total of 54.74”. And then, of course, there have been the tremendous rainfalls associated with tropical storms the past few years which broke state precipitation records for any tropical cyclone in Arkansas, Hawaii, North Carolina, South Carolina, and Texas. The greatest 24-hour rainfall on record anywhere in the United States occurred on April 14-15, 2018, when 49.69” flooded Waipa Garden on the island of Kauai, Hawaii. Kansas surpassed its wettest month record in May 2019, when 26.73” of rain was measured at a site 3 miles southwest of Rock. Most recently Arkansas broke its all-time state 24-hour precipitation record when 16.17” of rain deluged the town of Dierks on July 15-16, 2019. Some recent state precipitation records (2018-19) This was also the wettest of any 12-month span on record, just ahead of the 37.82” recorded on August 2018–July 2019. The 12-month period of July 2018-June 2019 was (by far) the wettest July-to-June period on record for the contiguous U.S.
Eight states and the District of Columbia saw at least one site break the respective state record for most precipitation measured in a calendar year (see table further down in this post).įigure 1. It was the third wettest on record (since 1895) for the contiguous U.S., surpassed only by 1973 (#1) and 1983 (#2). Contributing to this was the very wet calendar year of 2018. The 12-month period ending in June 2019 was the wettest year-long period on record for the contiguous United States (see Bob Henson's post about this). Image credit: Courtesy Paul Chesley (from my book Extreme Weather A Guide and Record Book). when 49.69” of rainfall was measured on April 14-15, 2018. Waialeale, measured the greatest rainfall in any 24-hour period anywhere in the U.S. Last year, Waipa Gardens, located about 10 miles north of Mt. historical record for wettest single month, when 148.83” of rain was measured during the month of March 1982.
Waialeale, on Hawaii’s Kauai Island, holds the U.S.
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