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heavy rain Consuegra, Castilla-La Mancha, Spain: 14 June 1903: 247 thunderstorm Heppner Flood of 1903, Oregon, U.S. Second-deadliest flash flood in the United States; killed almost a quarter of the town's residents. 11 July 1912: 8 thunderstorm Mazuma, Nevada, Postmistress among the dead. Relief efforts included a fund set up by William ...
Within 30 minutes, local amounts of 50 mm (2.0 in) had fallen near Laporte and Livermore, with 50 mm (2.0 in) more falling near Loveland before the storm weakened around 8 pm. South of Fort Collins, new thunderstorm development began around 10 pm, which spread north through the city, dumping another 12 mm (0.47 in) of rain before dissipating ...
Precipitation is measured using a rain gauge, and more recently remote sensing techniques such as a weather radar. When classified according to the rate of precipitation, rain can be divided into categories. Light rain describes rainfall which falls at a rate of between a trace and 2.5 millimetres (0.098 in) per hour. Moderate rain describes ...
The rare May 2019 atmospheric rivers, classified as Category 1 and Category 2, are beneficial in terms of preventing seasonal wildfires but the "swings between heavy rain and raging wildfires" are raising questions about moving from "understanding that the climate is changing to understanding what to do about it." [38]
Nor'easters may cause coastal flooding, coastal erosion, heavy rain or snow, and hurricane-force winds. The precipitation pattern of Nor'easters is similar to other mature extratropical storms . Nor'easters can cause heavy rain or snow, either within their comma-head precipitation pattern or along their trailing cold or stationary front.
Floods in the United States before 1900 is a list of flood events that were of significant impact to the country, before 1900. Floods are generally caused by excessive rainfall , excessive snowmelt, and dam failure.
On September 29, 2023, heavy rainfall led to flooding across portions of the New York metropolitan area and surrounding areas in the United States. The floods were caused by a low-pressure area that had absorbed the remnants of Tropical Storm Ophelia , which then stalled over the New York City area.
The flood is among the most costly and devastating to ever occur in the United States, with 50 dead and US$12–16 billion in damages (equivalent to $23–30 billion in 2023). The hydrographic basin affected an area approximately totaling 320,000 square miles (830,000 km 2 ), of about 745 miles (1,199 km) in length and about 435 miles (700 km ...