The Weather Company’s primary journalistic mission is to report on breaking weather news, the environment and the importance of science to our lives. Additionally, these extremes generally took place during the summer months or early in the fall. Most of the Northeast has 24-hour rainfall extremes between 10 and 15 inches, with the exception being Massachusetts at 18.2 inches. This is because these areas are well-removed from ocean influences, including tropical storms and hurricanes, and have a rather dry climate overall. For example, the most extreme 24-hour rainfall total on record in Utah is only 5.1 inches, the lowest of all 50 states. Some of the lowest extreme rainfall totals are in the Northern Plains, Rockies and Great Basin. The exception there is South Carolina, with a 24-hour extreme of 14.8 inches. In the Southeast, the 24-hour rainfall extremes are mainly between 20 and 25 inches. The Lower 48 record was set in Texas July 25-26, 1979, when Tropical Storm Claudette brought 42 inches of rain to the town of Alvin in 24 hours. Luckily, there are ample sources of rainfall data around the Portland metropolitan area.
Rainfall drives how much water is in streams. By Oregon Water Science Center May 11, 2017. Portland Metropolitan Area Weather and Precipitation. In the Lower 48, it's no surprise that the states with the most extreme 24-hour rainfall totals are located in the Southeast and along the Gulf Coast, as these are the areas most likely to take a direct hit from a tropical storm or hurricane. Portland Metropolitan Area Weather and Precipitation Active. Records for 24-hour rainfall in the United States range from less than 6 inches to more than 4 feet, according to NOAA. If they determine any measurements exceeding 23.28 inches are valid, then this Fort Lauderdale rain event could earn the top spot. NOAA's State Climate Extremes Committee could review official and unofficial rainfall totals in the Fort Lauderdale area that rival the state's 24-hour record from Key West at some point in the future. 5, 1950, weather historian Christopher Burt said in an email to. For example, an estimated 38.7 inches might have soaked Yankeetown, Florida, on Sept. It's possible higher totals might have occurred in the state's history, but weren't measured by instrumentation that was deemed reliable or were estimates. 11-12, 1980, according to NOAA's State Climate Extremes Committee. Key West, Florida, currently holds the official record for the most rain the state has seen in 24 hours.
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