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FAST-MOVING COLD FRONTS (INACTIVE COLD FRONT)
COLD FRONTS ALOFT

Aerographers Mate, Module 05-Basic Meteorology
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directions  are  a  good  indication  of  the  passage  of  a fast-moving  cold  front.  The  wind  veers  with  frontal passage   and   is   strong,   gusty,   and   turbulent   for   a considerable  period  of  time  after  passage.  The  dew point decreases sharply after frontal passage. Weather Cumulonimbus clouds are observed along and just ahead  of  the  surface  front.  Stratus,  nimbostratus,  and altostratus may extend ahead of the front in advance of the  cumulonimbus  and  may  extend  as  much  as  150 4-34 200 150 100 50 0 50 100 PRECIP. AREA CUMULONIMBUS ALTOCUMULUS 0    C O CIRROSTRATUS COLD AIR SUBSIDENCE INVERSION FRONTAL INVERSION CUMULUS WIND Ns 15,000 10,000 5,000 ALTITUDE     FT CIRRUS AG5f0432 STRATOCUMULUS 20,000 25,000 WIND 0O UPPER WIND- FLOW OR OR Figure 4-32.—Typical vertical structure of a fast-moving cold front with upper windflow across the front.







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