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In two locations on the same night, the storm that hit the Northeast this weekend dumped rain at or near rates that should only be expected once in 1,000 years. On one night, two places in the ...
Videos highlight the flooding in upstate New York caused by the remnants of Tropical Storm Debby, revealing damage and submerged streets. The intense downpours have led to dramatic scenes of water ...
There is also a probability of precipitation for every location in the United States for every minute for the next two hours. This is also known as a minute-cast. This is also known as a minute-cast. The Weather Channel 's definition may include precipitation amounts below 0.01 inch (0.254 mm) and includes the chance of precipitation 3 hours ...
This method has been used for years within National Weather Service forecasts, as a period's chance of rain equals the chance that 0.01 inches (0.25 mm) will fall in any particular spot. [16] In this case, it is known as probability of precipitation. These probabilities can be derived from a deterministic forecast using computer post-processing.
It remains a useful method of observing rainfall over data voids such as oceans, [78] as well as the forecasting of precipitation amounts and distribution in the future. A similar technique is used in medium range forecasting, which is known as teleconnections, when systems in other locations are used to help pin down the location of another ...
Record-breaking rain that month led to a devastating flood. The rainiest Jan. 23 was in 1996 with 1.57 inches of rain. By contrast, the NWS recorded 0.45 inches of rain Tuesday , and 0 inches ...
The theoretical return period between occurrences is the inverse of the average frequency of occurrence. For example, a 10-year flood has a 1/10 = 0.1 or 10% chance of being exceeded in any one year and a 50-year flood has a 0.02 or 2% chance of being exceeded in any one year.
Here are rainfall amounts, in inches, from the last 24 hours (unless otherwise noted) by locality, according to National Weather Service St. Louis: Illinois locations Belleville: 6.23, 6.33