closed low"A low that may be completely encircled by an isobar or contour line.
Closed Low - A low pressure area with a distinct center of cyclonic circulation which can be completely encircled by one or more isobars or height contour lines.
CLOSED LOW: See Cutoff Low below.
COASTAL FLOODING: The inundation of land areas along the coast caused by sea water above normal tidal actions.
CLOSED LOW- A low pressure center having a closed circulation, which is used in reference to systems in the upper levels of the atmosphere. Closed lows will have one or more height contours encircling them.
CNVTN- Convection ...
CLOSED LOW A region of low pressure distinguished by a center of counterclockwise circulation (in the Northern Hemisphere), and is surrounded by one or more isobars or height contours.
"Cutoff low" and "closed low" often are used interchangeably to describe low pressure centers aloft. However, not all closed lows are completely removed from the influence of the basic westerlies.
Other areas where it may occur include near mountains, in closed lows aloft, and because of wind shear. Often referred to as CAT.
in which it will take a watershed to react to a given rainfall eventRetrogression(or Retrograde Motion) - Movement of a weather system in a direction opposite to that of the basic flow in which it is embedded, usually referring to a closed low or ...
While some systems (such as closed lows or cutoff lows) may reach a state that is close to equivalent barotropic, ...
A low-pressure system, usually a closed low or cutoff low, which is not tilted with height, i.e., located similarly at all levels of the atmosphere.
Vertically-stacked System - A low-pressure system, usually a closed low or cutoff low, which is not tilted with height, i.e., located similarly at all levels of the atmosphere.
A cut-off low usually begins as a trough in the upper-air flow, which becomes a closed circulation and then extends down to the surface. Also known as closed low or cold pool.
TroughAn elongated area of relatively low atmospheric pressure, usually not associated with a closed circulation, and thus used to distinguish from a closed low. The opposite of ridge.TROWALTROugh of Warm Air ALoft.
(or Retrograde Motion) Movement of a weather system in a direction opposite to that of the basic flow in which it is embedded, usually referring to a closed low or a longwave trough which moves westward at mid-latitudes.
Return flow ...
Rex Block A blocking pattern where there is an upper level high located directly north of a closed low.
Quasi-stationary - describes a low or high pressure area or a front that is nearly stationary.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Closed Low, Cutoff Low, Quasi-stationary, Trough, ...
Retrogression (or Retrograde Motion) - Movement of a weather system in a direction opposite to that of the basic flow in which it is embedded, usually referring to a closed low or a longwave trough which moves westward.
 See also: Weather, Cloud, Surface, Thunder, Air
  
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