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Flashcards in Hurricanes Deck (17)
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1

What is a tropical cyclone?

A warm core, low pressure system without any 'front'

2

Define tropical meteorology

the study of the atmosphere on the equatorial side of subtropical heights.

3

State the factors that control the difference of tropical and extratropical systems

-thermal Advection
-Fronts
-Surface convergence
-Upper level flow
-General circulation

4

State the differences between tropical and extratropical forecasting

-Small value of the coriolis parameter
-The high air temperature
-The strong surface heating of the air

5

identify the start and finish dates of hurricane season

June 1 through November 30 with peak activity in September

6

What is the fundamental process in the formation of hurricanes

Latent Heat release

7

What are the 2 energy sources at work during the formation of a hurricane?

Latent heat
Sensible heat

8

What are the points of the positive feedback loop which enhances storms

-Intense latent heating, divergence aloft lowers surface pressure
-Lower surface pressure (convergence) increases the pressure gradient generating stronger winds
-stronger winds increase friction
-Stronger convergence into storms center
-enhance convection, back to step 1

9

List the 6 elements required for the formation of a huricane

Latitude
Over ocean
Positive low level vorticity
Conditional instability
mid-tropospheric humidity
minimum vertical shear

10

what latitude do hurricanes form?

5-15 degrees

11

What is the ocean temperature required?

26.5 degrees

12

tropical cyclones only form in regions where _______ humidity is high.

mid level

13

Hurricanes require minimum vertical shear because:

it prevents energy from being dispersed and allows for the enhancement of convection currents

14

List the meteorological hazards associated with hurricanes:

Wind
Rain
Thunderstorms
Storm surges
Tornadoes

15

what is the hurricane wind scale called and the low and max values

Shafir- Simpson hurricane intensity scale
64 kts to 200 kts

16

What typical rain amounts occur from hurricanes and what can they lead to

130-250mm, flash flooding

17

Tornadoes typically occur _________ of the storm center

NE or E or any quadrant within 50nm