Wind Flashcards
Pressure Gradient Force
Air will flow from high to low
Gardient wind
Wind caused by pressure gradient force. Slower around low, faster around high
Geostrophic force (coriolis)
caused by rotation of earth. Makes air move right in the northern hemisphere
Gestrophic wind
Wind whihch is blown as a result of balance between geostrophic force and pressure gradient force. Blows along isobars
Veering
Increase in wind direction
Backing
decrease in wind direction
Wind below 2000ft
Slower, backing
Wind below 2000ft backing amount
Day: -20, night: -40
Buys Ballot Law
if you stand with your back to the wind in the northern hempisphjere, low pressure is on your left
Katabatic wind
Movement of cold air desceding from mountians by night
Anabatic wind
movement of air ascending a mountain by day
Funnel Wind
wind blowing in brtween mountains through the valley
Fohn wind
Warm decseding air down the leeward side of the mountain
Standing wave or mountain wave creation conditins
- Obstruction or barrier, like mountaiin
- Strong wind blowing at right angles
- Wind speed more than 20kt
Windshear
Variation of wind speed and/or direction from place to place.