Cold Fronts:
cover about 100 miles
slant backward
move quicker than warm fronts
begin with high cumulus clouds, lowering into layers of stratocumulus, bringing rain
if strong -cumulonimbus (thunderheads) form along the squall line
afterward -clear, dry, cool weather
(The Backpacker's Field Manual, A Comprehensive Guide to Mastering Backcountry Sills, by Rick Curtis
)