GEOGRAPHY 304 Exam II

The line between two air masses of differing humidity and temperature. Called the dryline because the border creates a line of distinctly dry weather compared to the other side of the line

velocity precipitation must reach in order to fall from the sky

raindrops or snowflakes collide with each other and grow

the growing of precipitation through collision

amount f water vapor in the air keeps supercooled water droplets in equilibrium, but ice grows through deposition as water droplets shrink through evaporation

above freezing

part above part below freezing

entirely below freezing

supercooled water droplets collide with snow

rain guage, snow pillow

what is happening at the top of the troposphere

few miles to few hundred miles

few 1000 miles

low pressure area cut off from main storm system

flow is horizontal, covers multiple zones

vertical flow

allows us to see inside the cloud

strong differences in pressure over short distances

cold dry air from north meets warm moist air from gulf. high wind shear aloft meets storm front, mesocyclonic storm or supercell

inversion layer

80 degrees F depth of 100 feet