Questions weather Flashcards
Ambient lapse rate
rate of decrease in temperature with altitude. Stability can be determined
unstable cold airmass moving to warm area.
Cumuliform clouds, turbulence and good visibility
Unstable air means
Cumuliform clouds,
showery precipitation,
turbulnace,
good visibility
Lenticular altocumulus clouds
created by on the crest of waves created by the barrier in the wind flow.
very Strong turbulence
Jet stream
high altitude, may be marked by cirri form clouds
Small or huge temp. change in stratosphere (above the stratosphere)
small
Form of advection fog
example
Moist air moves over colder ground to water
for example: an air mass moving inland from the coast in winter
Temperature inversion
is standard lapse rate and stable air
Wind necessary for which type of fog
advection and upslope
Why at 5000 ft wind is from southwest but surface is from south
Coriolis force deflected by surface friction
4 families of clouds
High, Middle , Low and extensive vertical development
cumulus clouds indicate
good visibility, turbulence at and below level clouds
feature associated to tropopause
abrupt change in lapse rate and hight is 20000 to 65000
Wind speed of jet stream
50 knots
unstable airmass is forced to ascend a mountain slope
clouds with extensive vertical development
flying and encountered wet snow, it means
temperature is above freezing, sublimation is happening, and snow is melting
warm rain fall though cool air near the surface and fog happens in
cold frontal
Average hight of the troposphere in the middle latitude
37000
The layers of of atmosphere from the earth’s surface
troposphere, stratosfere, mesosphere
frontal system and clouds, pressure and wind
Clouds: make gradual or abrupt
Clouds: not all frontal systems
Wind: change in direction, speed
inversion
Increase in temperature with altitude
often happens near the ground on clear cool night with light wind
Cumulonimbus vs towering cumulus. Which one has the greatest turbulence
cumulonimbus
Lentocular clouds in mountainous areas means
turbulence
frontal waves normally form on
slow moving cold fronts or stationary fronts.
Convective turbulence almost always present
During warm summer afternoon when winds are light
temperature inversion Why and expect?
increase temperature with altitude
clear night and wind is light
lowest few thousands feet above the ground. wind shears will be seen and generates turbulence
Dry Adiabatic lapse rate is
3 Celsius every 1000ft
Radiation fog
Warm, moist air over low flatland areas on calm nights
weather conditions when there is a low level temp. inversion
smooth air, low visibility due to haze, fog, low clouds
Growth rate of precipitation
upward currents
strength and location of jet stream
strong in winter and shifts farther south un winter.
weaker in north in the summer time
Clouds, fog and dew always will form
water vapor condenses
