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SEPTEMBER 1996 ,4 Dee 93 0500 (UTG) 5000 T'm/S :t ' if " l ,1' ,r 4000 ~ ~ 3000 " J: 2000 1000 - ,0000 -5000 5000 ,0000 ,5000 Distance f,om JVL (m) " Jan 94 1100 (UTC) 5000 Tlmls 4000 ~ ~ 3000 " J: ,T ,,' 2000 -5000 0 5000 10000 15000 Distance from JVL (m) REYNOLDS 1439 ,4 Dee 93 , 200 (lJTC) 05 Mar 92 ,500 (UTe) 5000 5000 T'm/S , , r T' m/s ..' 4000 4000 ~ ~ 3000 " J: ~ ~ 3000 " J: 2000 -5000 0 5000 10000 15000 Distance from JVL (m) -5000 5000 10000 15000 Distance from JVL (m) 17 Feb 94 1700 (UTC) ,4 Mar 92 2300 (UTC) 5000 5000 r 1 mls " ,I ,I " l l !J./ ~ ~3000 .. J: T' mls .1 / I" 4000 4000 ~ ~ 3000 J: 2000 1000 -10000 -5000 0 5000 10000 15000 Distance from JVL (m) 1000 - 10000 -5000 0 5000 10000 15000 Distance from JVL (m) FIG. 7. Rawinsonde-derived vertical velocities for soundings taken during storm events prior to the passage of the surface cold front. Note the very strong downdraft observed immediately after launch and the rapid horizontal displacement. 29 NOV 93 1700 (UTC) 5000 T'mJs 4000 g ~3000 .. :I: 2000 -5000 0 5000 10000 15000 Distance from JVL (m) 24 Jan 94 0500 (UTC) 5000 T'mJs 4000 ~ ~3000 .. :I: -5000 0 5000 10000 15000 Distance from JVL (m) 07 Feb 94 , 800 (UTC) ,8 Feb 94 ,,00 (UTe) 5000 5000 , .. / T 1 mls / T 1 mJs 4000 4000 g ~ i 3000 ~ 3000 :I: :I: ,t' 2000 l' f 1000 1000 -10000 -5000 5000 10000 15000 -10000 -5000 0 5000 10000 15000 Distance from JVL (m) Distance from JVL (m) 08 Feb 94 0000 (UTe) 05 Feb 93 ,800 (UTe) 5000 5000 T'mJs 4000 4000 g g 13000 i 3000 " :I: __:1:- 2000 2000 -5000 0 5000 10000 15000 .5000 0 5000 10000 15000 Distance lrom JVL (m) Distance from JVL (m) FIG. 8. Same as Fig. 7 but for soundings taken after surface frontal passage. Note the strong downdraft immediately after launch has been replaced with a general upward motion through 5000 m. There is much less horizontal displacement during these events, indicating much lighter winds.