FRONT
Front is
A transition zone where two air masses of different densities (temperatures, humidities) meet is known as a front
Define the Tropics
The belt between the Tropics of Cancer and Capricorn.
•The tropics are defined roughly as the boundaries of the Hadley cell.
lapse rate is
A Tropical Cyclone is..
What is a non-frontal cyclone of synoptic scale, developing over tropical or subtropical waters and having a definite organised circulation?
Weather before, during and after cold front
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The Inter Tropical Convergence Zone is
What is the region of confluence of the Northeast and southeast trades winds?
LCL is
What is lifting condensation level,Wwich is the level at which water vapour condenses and starts to for clouds?
Conditions necessary for Tropical cyclone formation
What are pre-existing conditions, SST of >26.5 C with a depth of at least 50 m, weak vertical shear, location poleward of 5 degrees latitude, moist environment, upper-level diffluence?
Warm sector is
Area between cold and warm fronts
The Trade Wind Inversion is
Layer of warming in the vertical due to sinking air in the region of the STH.
What is equilibrium level, where the air temperature equals the parcel temperature?
A Tropical watch and warning is
A Tropical Storm Watch is issued when a tropical cyclone containing winds of 34 to 63 kt (39 to 73 mph) or higher poses a possible threat, generally within 48 hours.
A Tropical Storm Warning is issued when sustained winds of 34 to 63 kt (39 to 73 mph) or higher associated with a tropical cyclone are expected in 36 hours or less.
Stages of mid-latitude cyclone
stationary front, frontal wave, open wave, mature/initial occlusion, advanced occlusion, cut-off low
According to the classical easterly wave model, the weather(precipitation, clouds, winds, pressure) before, during, and after a tropical wave is.
Before: Pressure- falling, clouds- CU, Sc, CI, Wx- few showers, Winds-NE
During: Pressure- lowest, clouds- CB, TCU, SC, Wx - showers, TS
After- Pressure- increasing, Clouds- TCU, CB, Sc, AC, AS, CI Wx-frequent moderate to heavy showers, with light rain between showers. Thunderstorms
Four mechanisms for cloud development
Hurricanes begin to lose their tropical characteristics when they
- move over land
- unfavorable wind conditions
- move out of moist environment / dry air entrainment
A Mid-latitude cyclone is the most intense
Stages of tropical cyclone
Tropical disturbance/tropical wave, tropical depressions, tropical storm, Hurricane
Adiabatic cooling is..... and it happens because...
As an air parcel rises, it expands due to decreased pressure and cools. This is because air molecules are spread out, and the average kinetic energy is less.
Difference between a Tropical cyclone and mid latitude cyclone...
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