Condensation
particles of dust and ash; needed to form raindrops
What are condensation nucleii?
where an air mass forms
What is a source region?
boundary between two unlike air masses
What is a front?
can produce thunder and lightning
What is a thunderstorm?
triangles along a line
forms on surfaces when temperature if very need 32°F
What is frost?
cold and wet
What is mP - continental polar?
front that can produce severe thunderstorms
What is cold front?
scale used for classifying tornadoes
What is the Enhanced Fujita Scale?
front that shows as all red
What is a warm front?
thunderstorm cloud
What is cumulonimbus?
What is cT - continental tropical?
warm air moves aloft; wedge-like boundary
What is a warm front?
What is a tornado watch?
lines connecting points of equal pressure
What is an isobar?
Michigan's dominant air mass
What is cP - continental polar?
a regional uplift mechanism
What is convergent?
scale used to classify hurricanes
indicates a strong wind
What are closely spaced isobars?
hazard for ski resorts because warm air is over cool snow
What is advection fog?
summer only air mass for North America
What is cT - continental tropical?
What is an occluded front?
issued 24 hours before expected impact
What is a hurricane warning?
triangles and semi-circles along opposite sides of a line
What is a stationary front?