SYNOPSIS FOR: 04/09/94 - VORTEX-94

A strong wind max , pushing  southeast from the Pacific NW, was carving 
out a significant trof over the southwest U.S.   The negative tilt trof was 
beginning to develop a closed center over Nevada by evening.  Shortwave 
energy, moving through the mean trof,  began to move out over the Plains 
during the day.  A first shortwave triggered early morning  convection  over  
KS and northern  OK.  The KS portion of the convection, north of an east-
west frontal boundary, continued all during the day.   During the day, a 
surface cyclone deepened over the northern TX Panhandle and a strong 
dryline developed southward .  Large amounts of low-level moisture moved 
northward from TX and mid-60s dew points covered  the central 1/3 of OK 
by early afternoon.  A second shortwave approached the cyclone area from 
NM by early afternoon.  This wave was associated with a significant 
tropospheric jet streak  that ran from  AMA to east of DDC  by evening  (> 
100 kt at 300 mb).   To the south of the jet streak (in the warm sector of the 
cyclone) a strong mid-level cap developed.  As the dryline accelerated 
eastward into western OK and the triple point moved into northwest OK, 
convection formed along the warm front as it retreated northward into 
southern KS.  Some of the early convection formed to the northwest of the 
surface low where moisture was being  advected westward.  The first 
tornadic storm/supercell, and the one that produced the most destructive 
tornadoes, formed near LBL and moved to SE  of DDC, and eventually to 
near ICT.  Two other tornadic storms/supercells formed  northeast of the 
triple point and moved easxtward to southeast of ICT., just north of the 
warm front.  Significant deep convection failed to form along the dryline 
during the daylight hours because of the strength of the capping inversion.  
The shortwave/jet streak ,passing by to the north, failed to provide the 
lifting that would have been necessary to break the cap over OK.

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