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An anabatic wind, from the Greek anabatos, verbal of anabainein meaning "moving upward", is a warm wind which blows up a steep slope or mountain side, driven by heating of the slope through insolation. [1] [2] It is also known as upslope flow. These winds typically occur during the daytime in calm sunny weather.
Diurnal wind system variation in the Appalachian mountain range. Mountain and valley breezes form through a process similar to sea and land breezes. During the day, the sun heats up mountain air rapidly while the valley remains relatively cooler. Convection causes it to rise, causing a valley breeze. At night, the process is reversed.
In a more general case, several effects may be present and if the synoptic wind is opposed to the anabatic wind, additional convergence occurs at the top of the mountain. [3] It is also possible to create a convergence zone behind the mountain when the synoptic wind can divide and go around it to meet again (ex. Puget Sound Convergence Zone ...
Orographic precipitation, also known as relief precipitation, is precipitation generated by a forced upward movement of air upon encountering a physiographic upland (see anabatic wind). This lifting can be caused by: Upward deflection of large-scale horizontal flow by the orography.
This chart lets you estimate the wind chill without having to do the math yourself. Find the value closest to the temperature at the top of the chart and the wind speed to the left.
Cloud. Cumulonimbus cloud; Arcus cloud; Downburst. Microburst; Heat burst; Derecho; Lightning. Volcanic lightning; Thunderstorm. Air-mass thunderstorm; Thundersnow
A strong Santa Ana wind event is setting up across Southern California. A rare Particularly Dangerous Situation (PDS) alert has been issued for Los Angeles and Ventura counties.
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