North American HighNorth American High The relatively weak general area of high pressure which, as shown on mean charts of sea-level pressure, covers most of North America…
North Atlantic Oscillation(Abbrev. NAO) - the NAO is a large-scale fluctuation in atmospheric pressure between the subtropical high pressure system located near the Azores in the…
North Pacific HighA semi-permanent, subtropical area of high pressure in the North Pacific Ocean.
North Slope of Alaska (NSA) siteThe third ARM research site, the NSA locale has is located in Barrow, Alaska. Its polar regions are predicted to undergo the largest warming in response…
North WallThe north side boundary of the Gulf Stream generally extending northeast from Cape Hatteras where the Gulf Stream turns northeast.
Northern LightsCommon name for Aurora Borealis; the luminous, radiant emission from the upper atmosphere over middle and high latitudes, and centred around the earth's…
NowcastA short-term weather forecast, generally out to six hours or less. This is also called a Short Term Forecast.
NSNimbostratus- A cloud of the class characterized by a formless layer that is almost uniformly dark gray; a rain cloud of the layer type, of low altitude…
NSSLNational Severe Storms Laboratory - this is one of NOAA's internationally known Environmental Research Laboratories, leading the way in investigations of…
Nuclear electric powerElectricity generated by an electric power plant whose turbines are driven by steam generated in a reactor by heat from the fissioning of nuclear fuel.
Nuclear EnergyEnergy that comes from splitting atoms of radioactive materials, such as uranium, and which produces radioactive wastes.
Numerical ForecastingA computer forecast or prediction based on equations governing the motions and the forces affecting motion of fluids.
Numerical Weather PredictionSame as Numerical Forecasting; a computer forecast or prediction based on equations governing the motions and the forces affecting motion of fluids.
NumerousA National Weather Service convective precipitation descriptor for a 60 or 70 percent chance of measurable precipitation (0.01 inch).
NVANegative Vorticity Advection - the advection of lower values of vorticity into an area.
NWRNOAA Weather Radio - "the voice of the National Weather Service" - NOAA Weather Radio broadcasts National Weather Service warnings, watches, forecasts and…
NWSNational Weather Service. An agency of the Federal Government within the Department of Commerce, National Oceanic and Atmospheric Administration, which is…