3 Elements that Effect the Movement of Cyclones - Correct Answer 1. In Westerlies
(shifts constantly to east)
2. Cyclonic wind circulation (in to center of low press, counterclockwise in N hemi,
converge and ascend)
3. Cold front advances faster than warm
Cyclogenesis (definition) - Correct Answer birth of a cyclone
Cyclones reach maturity in how many days? - Correct Answer 3 - 6 days
2 types of relationships between upper and lower air flow in a cyclone - Correct Answer
1. Zonal (not active)
2. Meridional (is active)
Occlusion - Correct Answer the last stage of the life cycle of a cyclone, where there is
an occurrence of an occluded front.
In the N hemisphere, there are approx ____ cyclones occurring at all times. - Correct
Answer 6 - 15
Cyclones are more abundant, stronger, and faster in the _____ rather than the ______,
due to a steeper pressure gradient. - Correct Answer winter, summer
, Mid-Lat Anticyclones (Characteristics) - Correct Answer -descending, diverging air
- no fronts
-clear, dry weather
- strong winds
- may stagnate and remain in a region
Easterly Waves - Correct Answer -long, weak, low pressure (trough-like) system
- 5*-30*
- oriented N - S
- 100s of miles long
- origin of most major disturbances in tropics
Easterly Waves are found between what latitudes? - Correct Answer 5* - 30*
How long are Easterly waves? - Correct Answer 100s of miles
Major Tropical Disturbances are classified based on ____ ____. - Correct Answer wind
speed
A major tropical disturbance is classified as a tropical depression if it has a wind speed
of _____. - Correct Answer less than 33 knots (38 mph)
A major tropical disturbance is classified as a tropical storm if it has a wind speed of
_____. - Correct Answer 33 - 63 knots (39-73 mph)
A major tropical disturbance is classified as a hurricane if it has a wind speed of _____.
- Correct Answer at least 63 knots (or 73 mph)
Major tropical disturbances are __(smaller/larger)___ than mid-lat cyclones. - Correct
Answer smaller (they are more narrowly focused)
Major Tropical Disturbances (characteristics) - Correct Answer - intense, low pressure
disturbances
- develop in tropics
- smaller than mid-lat cyclones
- 100-600 miles wide
- include hurricanes, typhoons, cyclones...
When a tropical depression becomes a tropical storm (and maybe later a hurricane), it
is named according to.... - Correct Answer a pre-determined alphabetical list.
The three U.S. tracking centers for tropical storms and hurricanes are located where? -
Correct Answer Miami, Honolulu, and Guam
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