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The Climate Forecast System or coupled forecast system ( CFS) is a medium to long range numerical weather prediction and a climate model run by the National Centers for Environmental Prediction (NCEP) to bridge weather and climate timescales. [1] Version 2 became operational as CFSv2 in 2011.
The North American Mesoscale Model ( NAM) is a numerical weather prediction model run by National Centers for Environmental Prediction for short-term weather forecasting. Currently, the Weather Research and Forecasting Non-hydrostatic Mesoscale Model (WRF-NMM) model system serves as the dynamical core of the NAM model.
Global Forecast System. 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).
As such, the idea of numerical weather prediction is to sample the state of the fluid at a given time and use the equations of fluid dynamics and thermodynamics to estimate the state of the fluid at some time in the future. The process of entering observation data into the model to generate initial conditions is called initialization.
Lake Helen at Mount Lassen [10] and Kalmia Lake in the Trinity Alps are estimated to receive 600-700 inches of snow per year. Tamarack in Calaveras County holds the record for the deepest snowfall on earth (884 inches (2,250 cm)). 5. Alaska. Valdez. 314.1 inches (798 cm) 95 feet (29 m) 61°08′N 146°21′W / . 61.13°N 146.35°W.
The most recent storm that moved onshore in the Northwest on Wednesday has already dropped well over a foot of snow in portions of the Washington Cascades. At least 29 inches had fallen at Stevens ...
Climate change increased temperature, reduced the amount of precipitation, decreased snowpack and increased the ability of air to soak humidity, helping to create arid conditions. As of 2021 the drought was the most severe in the last 500 years. [62] As of 30 June 2021 61% of continental USA were in drought conditions.
Snow comprises individual ice crystals that grow while suspended in the atmosphere —usually within clouds—and then fall, accumulating on the ground where they undergo further changes. [2] It consists of frozen crystalline water throughout its life cycle, starting when, under suitable conditions, the ice crystals form in the atmosphere ...