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PRESSURE JUMP A sudden increase in the observed atmospheric pressure or station pressure.
Pressure Jump A sudden, sharp increase in atmospheric pressure, typically occurring along an active front and preceding a storm.
pressure jump—A sudden, significant increase in station pressure.
pressure tendency—See barometric tendency.
In the Great Lakes, this forcing mechanism may be either strong winds along the axis of a lake, a pressure jump, or down draft winds associated with fast moving squall lines over the lake. In either case, water is piled up at one end.
jump - 1. A discontinuity in a function or a derivative of a function such that it assumes different values at a point when the point is approached from different directions. 2. See pressure jump.
This boundary, which is marked by upward motion along it and downward motion behind it, is followed by a surge of gusty winds on or near the ground. A gust front is often associated with a pressure jump, wind shift, temperature drop, ...
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Atmospheric pressure, Barogram, Pascal, PRES, Pressure, Pressure Gage, Pressure Gradient, Pressure Gradient Force, Pressure head, Pressure Jump, ...
 See also: Pressure, Precipitation, Cloud, Temperature, Clouds
  
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