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The Weather Channel's definition may include precipitation amounts below 0.01 inch (0.254 mm) and includes the chance of precipitation 3 hours before or after the forecast period. This latter change was described as less objective and more consumer-centric. [5] The Weather Channel has an observed wet bias – the probability of precipitation is ...
Within the United States, the Hydrometeorological Prediction Center, [20] River Forecast Centers, [1] and local forecast offices within the National Weather Service create precipitation forecasts for up to five days in the future, [21] forecasting amounts equal to or greater than 0.01 inches (0.25 mm). Starting in the mid-to-late 1990s, QPFs ...
Map of regions covered by the 122 Weather Forecast Offices. The National Weather Service operates 122 weather forecast offices. [1] [2] Each weather forecast office (WFO or NWSFO) has a geographic area of responsibility, also known as a county warning area, for issuing local public, marine, aviation, fire, and hydrology forecasts.
As of Feb. 15, the center’s forecast for northern and central California indicates that temperatures may lean above normal. Southern California has equal chances of temperatures being above or ...
Extreme southern California (including San Diego metro area) is forecast to pick up 1 to 3 inches of rain, with locally higher amounts up to 5 inches.
The resulting floodplain map is referred to as the 100-year floodplain. Estimates of the 100-year flood flowrate and other streamflow statistics for any stream in the United States are available. [3] In the UK, the Environment Agency publishes a comprehensive map of all areas at risk of a 1 in 100 year flood. [4]
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In winter these areas still sees precipitation as low pressure systems moving across the southern United States often tap moisture from the Gulf of Mexico and drop cold season precipitation from eastern Texas to the New York area. On the Florida peninsula, a strong monsoon becomes dominant, with dry winters and heavy summer rainfall. In winter ...