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Flash Flood Guidance is the amount of rainfall of a given duration over a small stream basin needed to create minor flooding (bankfull) conditions at the outlet of the stream basin. For flash flood occurrence, durations up to six hours are evaluated and the stream basin areas are of such a size to allow reasonably accurate precipitation ...
This map shows key rivers - French Broad, Nolichucky and Pigeon - and dams that were hit hard by the floods. Key East Tennessee rivers and dams hit hard by Hurricane Helene flooding
The flooding was the worst in Rhode Island history, as the Pawtuxet River crested over 69 feet—12 feet above flood stage, shattering the previous record by several feet. The rainstorm, which occurred during the cool, dry season, added 8.79" to an already rainy March.
The Global Flood Monitoring System, "GFMS", a computer tool which maps flood conditions worldwide, is available online. [67] Users anywhere in the world can use GFMS to determine when floods may occur in their area. GFMS uses precipitation data from NASA's Earth observing satellites and the Global Precipitation Measurement satellite, "GPM".
A Flood Watch is in effect for the Bay Area and Central Coast until 4 a.m. local time Wednesday, according to the NWS office in San Francisco, as excessive runoff may result in flooding of rivers ...
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The term 100-year flood indicates that the area has a one-percent chance of flooding in any given year, not that a flood will occur every 100 years. [2] Such maps are used in town planning, in the insurance industry, and by individuals who want to avoid moving into a home at risk of flooding or to know how to protect their property. FIRMs are ...
Map shows areas of Vermont under risk of excessive rainfall on Thursday, July 11, 2024. An official areal flood warning was issued around 4:30 p.m. Wednesday, July 10, and continued into early ...