Meteorology 2603
Solutions to Extra Credit Quiz #4

Friday, 20 April 2001

1.  List (DO NOT DESCRIBE) the 3 main stages of a lightning strike.
(See 3 pictures on frontspiece of lecture 29, which also are in the text)
a.  Stepped leader
b.  Upward-moving streamers/charge
c.  Return stroke

2.  LIST the meteorological conditions (sky cover, temperature,
dew point, winds) on the east and west sides of the dryline.
(See slide 8 of lecture 32)

West:  Clear skies, westerly winds, warm/hot temperatures, low dew points/RH

East:   Hazy/cloudy skies, southeasterly winds, warm temperatures, high dew points/RH

3.  Define the lifted index.
(See slide 18 of lecture 33)
The temperature of the environment at 500 mb minus the temperature at 500 mb of a parcel rising from the ground