Storm of Century
(not shown)
930313/1200
Warm Advection - wind blows from warmer air to colder air, acts to build UL ridge by expanding air column
Cold Advection -wind blows from colder air to warmer air, acts to deepen UL trough by contracting air column
UL Divergence
L975
Ahrens, Meteorology Today, 5th Ed.