- A disturbance of the flow pattern in the upper air, particularly one developed more strongly aloft than near the ground. Also known as an upper-level disturbance.
Aviation dictionary. 2014.
Look at other dictionaries:
Royal Thai Air Base Nam Phong — The Royal Thai Air Base Nam Phong in Nam Phong district, Khon Kaen Province, Thailand in June 1972 became a base of operations for United States Marine Corps air operations by Marine Aircraft Group 15, 1st Marine Aircraft Wing. Elements of… … Wikipedia
Cirrus cloud — A sky filled with many types of cirrus clouds Cirrus clouds (cloud classification symbol: Ci) are atmospheric clouds generally characterized by thin, wispy strands, giving them their name from the Latin word cirrus meaning a ringlet or curling… … Wikipedia
climate — /kluy mit/, n. 1. the composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years. 2. a region or… … Universalium
Cyclogenesis — The initial frontal wave (or low pressure area) forms at the location of the red dot on the image. It is usually perpendicular (at a right angle) to the leaf like cloud formation (baroclinic leaf) seen on satellite during the early stage of… … Wikipedia
Norwegian cyclone model — Norwegian cyclone and Shapiro Keyser model differences in frontal structure The older of the models of extratropical cyclone development is known as the Norwegian Cyclone Model, developed during and shortly after World War I within the Bergen… … Wikipedia
List of off-season Atlantic hurricanes — The list of off season Atlantic hurricanes includes 36 tropical or subtropical cyclones that formed outside of the official Atlantic basin season, which is currently defined from June 1 to November 30. [Chris Landsea.… … Wikipedia
global warming — an increase in the earth s average atmospheric temperature that causes corresponding changes in climate and that may result from the greenhouse effect. [1975 80] * * * Potential increase in global average surface temperatures resulting from… … Universalium
Deforestation — For other uses, see Deforestation (disambiguation). Jungle burned for agriculture in southern Mexico … Wikipedia
Nor'easter — Satellite image of the intense nor easter responsible for the North American blizzard of 2006. Note the hurricane like eye at the center. A nor easter (also northeaster; see below) is a type of macro scale storm along the East Coast of the United … Wikipedia
Hurricane Alma (1996) — Infobox Hurricane Name=Hurricane Alma Type=hurricane Year=1996 Basin=EPac Image location=Alma 23 june 1996 1336Z.jpg Formed=June 20, 1996 Dissipated=June 27, 1996 1 min winds= 90 Pressure=969 Da Inflated= Fatalities=20 reported Areas=Mexico… … Wikipedia