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Generally, the hottest month is August in the south and July in the north; during these months the thermometer can reach 38–42 °C (100.4–107.6 °F) in the south and 32–35 °C (89.6–95.0 °F) in the north; Sometimes the country can be split as during winter, with rain and 20–22 °C (68.0–71.6 °F) during the day in the north, and 30 ...
Progression of a well-anticipated high risk event across the Central Plains on April 14, 2012. This event ultimately produced 85 tornadoes that day, one of which killed six people. A high risk severe weather event is the greatest threat level issued by the Storm Prediction Center (SPC) for convective weather events in the United States. On the ...
The weather conditions were perfect, with fog adding to the atmosphere. ... Dolomites, Italy. "That day, after a storm of mixed snow and rain, the sky fortunately cleared after 8 p.m. (about an ...
They also began increasing the range of their forecast from 15 days to 25 days, 45 days, and (by 2016) to 90 days. These hyper-extended forecasts have been compared to actual results several times and shown to be misleading, inaccurate, and sometimes less accurate than simple predictions based on National Weather Service averages over a 30-year ...
The ENIAC main control panel at the Moore School of Electrical Engineering operated by Betty Jennings and Frances Bilas. The history of numerical weather prediction began in the 1920s through the efforts of Lewis Fry Richardson, who used procedures originally developed by Vilhelm Bjerknes [1] to produce by hand a six-hour forecast for the state of the atmosphere over two points in central ...
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 ...
Winds aloft, officially known as the winds and temperatures aloft forecast, (known as "FD" in the US and Canada, but becoming known as "FB", following the World Meteorological Organization [WMO] nomenclature), is a forecast of specific atmospheric conditions in terms of wind and temperature at certain altitudes, typically measured in feet (ft) above mean sea level (MSL).
An example of a forecast product from the GFS, in this case a 96-hour forecast of 850 mb geopotential height and temperature. The Global Forecast System (GFS) is a global numerical weather prediction system containing a global computer model and variational analysis run by the United States' National Weather Service (NWS).