severe weather Flashcards
(39 cards)
radar
device that transmits radio waves in the form of a beam
watch
tornado not formed
warning
tornado formed
which state has the most thunderstorms and why
florida because of their humidity
air mass thunderstorms
warm, moist air mass, occur in spring and summer, last an hour, single widely scattered
frontal thunderstorm
occur in lines along a frontal surface, strong, lasts several hours, heavy rain and flooding
lightning
abrupt high current electric charge that occurs in the atmosphere
thunderstorms
cumulonimbus, heavy rainfall,occasional hail
what do all thunderstorms require
warm moist air, instability(low pressure) warm surface temp,
when do most thunderstorms occur
afternoon, evening
development of thunderstorms
cumulus, mature, dissipatin
cloud to cloud lightning
75-90% of light occurs in cloud to cloud
cloud to ground
10-25% of light occurs in cloud to ground
lightning bolt temp
54,000 degrees
how fast does lightning travel
60,000 mi per sec
how many thunderstorms at any given time
1,500-2,000
how much lightning per sec
100-125
supercells
huge, single cell thunderstorm with strong updrafts, tornado is violent, whirling column of air in contact with ground
fujita tornado intensity scale
classifies tornado by wind speed, duration, and path of destruction
hurricane wind speed
74 mi per hour
what temp do hurricanes form
5-20 degrees
what is the strongest part of the hurricane
eye wall
the eye is
calm
more defined eye
stronger hurricane