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Test 3
Hurricanes, Mid latitude cylclones, and tornados
46
Meteorology
Undergraduate 1
02/10/2015

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Cards

Term
Give climate details and locatiom,
mP, mT, cP, cA, mT, and cT, temp and humidity
Definition
mP: Cool, Humid
cA: Very cold Very dry
cP: Cold dry
mT: Warm, humid
cT: HOt, dry
Term
Definition of Air Mass
Definition
Large body of air with uniform Temp and humidity
Term
Source Region Definition
Definition
Area where an air mass originates Atmospherically quite
Term
Air mass is warmer tahn the surface at which it moves: What letter and what does it equal?
Definition
w and stability, decreases the env. lapse rate
Term
Air mass is colder than the surface at which it moves add a
Definition
K and equals instability, increases the env. Lapse rate
Term
Characteristics of source regions
Definition
High and Low latitude, physically uniform and generally high pressure
Term
cP moves down in the summer: what do you add?
Definition
add a k, = cPk, instability
Term
mT moves up in the winter it will be warmer in the land add a....?
Definition
w, mTw, stability, creates fog sheet like clouds
Term
Characteristics of Mid Latitude Cyclones
Definition
Large Low pressure system, Travels West to East, form at polar front, warm front and cold front
Term
In the cumuls stage of an air mass thunderstorm what dominates?
Definition
Up drafts dominate
Term
In the dissipating stage of an air mass thunderstorm what dominates
Definition
Down drafts dominate
Term
In the western Pacific hurricanes are called?
Definition
typhoons
Term
The main difference between an air mass and a severe thunderstorm is that
Definition
in an air mass thunderstorm the precipitation falls in the updrafts where as in a severe thunderstorm the updrafts are tilted so the precipitation fassl in the downdrafts
Term
Norwegian models of mid latitude cyclone development the open stage is:
Definition
formation of Warm and cold front
Term
Dryline
Definition
a boundary between air masses with different humidity
Term
What is not a common air mass?
cA, mA, mT, cP
Definition
mA
Term
warm front occurs when
Definition
warm air moves into cold air
Term
stationary front
Definition
two different air masses move parallel to th front in opposite directions
Term
a cold type occluded front occurs when
Definition
Air begind the cold front is colder than air it is overtaking
Term
blocking highs
Definition
high pressure blocks the movement of low pressure systems cause a lot of floods
Term
conditions of thunderstorms
Definition
lift of the air, condition is unstable, moist air creates condensation
Term
Stages of an air mass Thunderstorm: CUmulus stage
Definition
Air is lifted until it reaches condensation level
Term
Stages of an air mass Thunderstorm: Mature Stage
Definition
Precipitation
Term
Stages of an air mass Thunderstorm: Dissipating Stage
Definition
downdrafts
Term
Roll cloud
Definition
severe thunderstorm formation of gust front, spins in a horizontal
Term
Microbursts
Definition
Really intense down drafts, straight winds
Term
formation of Lightning
Definition
- Thick clouds cumulonimbus becomes negative on the bottom
- Ground becomes positive
- The ground starts moving
- Dart leader, where the ground and cloud charges meet
Term
Dart Leader
Definition
The path has been established and is faster
Term
Step Leader
Definition
The charge moves downward and upward
Term
Supercell Thunderstorms
Definition
Form tornados most of the time, moist, unstable air, mesocyclone tilted by the up draft and anvil top
Term
Mesocyclone
Definition
rotation winds and wind sheer
Term
Tornado conditions needed
Definition
Funnel cloud touches the ground need the supercell thunderstorm, wind sheer in elevation, the change in direction inside the supercell
Term
Tornado Season: and why
Definition
Spring: mT going up the mP going down, contrasting air masses
Term
Tornado scale
Definition
EF: 0-5
Term
Hurricanes in the indian ocean
Definition
cyclones
Term
Hurricane in the atlantic ocean
Definition
Hurricane
Term
Hurricane scale
Definition
Saffir Simpson: 1-5
Term
Hurricane Season
Definition
June to Nov.
Term
Size of tornados, cyclones, and hurricane
Definition
Tornado (smallest), multitude cyclones(Biggest 1000 miles), and hurricane(2nd 500 miles)
Term
Hurricanes form between _* and _*
Definition
5* and 20* Latitude
Term
Formation of Hurricane
Definition
Wave Forms in trade winds (easterly wave) -> Areas of convergence and divergence
Air rises in areas of convergence -> Condensation releases latent heat

Heat causes more warming and pressure drop -> More moist air that is brought into the storm -> More condensation
Term
Stages to hurricane
Definition
Tropical disturbance: Mass of thunderstorms, no rotational air movementTropical depression: Closed isobars appears, winds are relatively slow (<61 km/hr)Tropical Storm: Wind 61 -119 km/hrHurricane: Faster than 119km/hr
Term
Movement of Hurricanes
Definition
North West
Term
Thunder forms when
Definition
the air is heated by the lightening and then expands: Sound that is made when the air expands
Term
Convergence Aloft
Definition
Cyclone
Term
Divergence Aloft
Definition
Anticyclone
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