How can we help?

You can also find more resources in our Help Center.

40 terms

Geo final: Ch 7

STUDY
PLAY
tornadoes characterized by
low pressure
order to classified as hurricane, wind velocity must exceed
119 (74) km/hr (mph)
eye of hurricane characterized by
sinking air
average directional movement of tornadoes
southwest to northeast
thunderstorms are unknown poleward of
60 degrees
calm fair weather is result of
midlatitude cyclone
most active phase of thunderstorm
mature phase
when neither air mass displaces adjacent one, boundary is called
stationary front
tornado advances at rate of speed of
22-50 km/hr
desert would be obvious zone of origin of
cT air mass
on average, ____ move fastest of all
cold fronts
extratropical cyclones and anticyclones functions in the
westerlies
hurricane formation is rare within ___ of equator
10 degrees
thunderstorms are violent ______storms
convective
stable anticyclones act as
block
global westerly wind zone impacts
middle latitudes
upper air divergence most closely associated with surface
cyclones
in occluded front, warm air sector is
above the ground
movement of middle latitude cyclones is determined by jet stream and
Rossby waves
cyclogenesis occurs along
the polar front
hurricane destruction to land coastlines worse when feature is present
storm surge
in N. Hemi, midlatitude cyclone has winds that circulate
counterclockwise while converging
along all fronts in a middle latitude cyclone
air rises
mature middle latitude cyclone takes shape of
wave
most midlatitude cyclones have
paths determined by upper air flow
common diameter for tornado funnel
50 meters
stage of thunderstorm associated with coexistance of updraft and downdrafts
mature stage
occurs mostr frequently
an easterly wave
in midlatitude anticyclone, strongest winds usually found
near eastern edge
the "death" of a midlatitude cyclone
occlusion
front that causes many hours of steady rain
warm front
____most dynamic and changeable day to day weather
middle latitudes
approx _____ lightning storms are occurring around the world
2000
cause associated with greatest loss of life in hurricanes
storm surges
boundary between mT and Ct air
dryline
1-5 scale rating hurricane intensity is the ____ scale
Saffir Simpson
What process seems to weaken hurricanes
eyewall replacement
large body of air with internal homogeneous characteristics is known as
air mass
____ affect weather over greatest area at any one time
midlatitude cyclone
part of thunderstorm cloud electrified with negative charges
near the base