11-19-21/11-20-21 Flashcards
Weather characterized by Cold Fronts and Warm Fronts
Cold Front are characterized by towering cumulus or cumulonimbus, heavy rain (sometimes lighting/thunder), hail, possibly tornadoes, poor visibility, variable/gusting winds, temperature/dewpoint and barometric pressure drop rapidly
Warm front are characterized by stratiform clouds, drizzle, low ceilings, poor visibility, variable winds, and rise in temperature
Trough Explained
Trough is when Low Pressure collides together at the surface and when surrounded by a higher pressure, the low pressure can’t go against the high pressure and it can’t go downward due to the surface, so it goes upward.
Ridge explained
Ridge is when Low Pressure collides together over a open ridge or canyon and descends downward
Coriolis Effect explained
Is caused by the rotation of the earth it deflects winds to the right in the Northern Hemisphere and Left in the Southern, near the equator there is little to no deflection. The effect is moving in a straight line is curved across a spherical mass, the curve is caused by different speeds of rotation around different areas around a sphere.
Surface Friction against Coriolis Effect Explained
Near the surface, friction reduces the wind speed, which reduces the Coriolis force. The weaker Coriolis force no longer balances the pressure gradient force and so the wind blows across the isobars toward lower pressure.
Dewpoint Defined
The temperature to which air must be cooled to become saturated
What weather occurs when Temperature/Dewpoint are closer together
Visible moisture “Clouds”, dew, or fog.
What determines the type of clouds that form and vertical extent of clouds that form.
Stability of atmosphere
If you encounter icing, which actions must be taken
Leave the area of visible moisture
Temperature Inversion Defined and Ground Based Temperature Inversions characteristics
Temperature inversions are increase in temperature with height.
Ground based temperature inversions characteristics are poor visibility by trapping of air particles and Stable air.