980630 - A Denver convergence vorticity zone (DCVZ) was present when the
VORTEX mobile mesonets departed from Boulder.  This boundary was oriented
in a NE-SE direction.  A second boundary was oriented W-E and was drifting
northward; the western end of this boundary intersected the DCVZ.  Wind
shifts were noted across both boundaries with winds changing from NW on the
western side to SE on the eastern side of the DCVZ.  Winds tended to be
more easterly north of the W-E boundary.  Additional boundaries were
created by convection moving eastward from the foothills.  The anvil from
this convection was responsible for creating some dry microbursts and
creating yet another scale of boundaries, all superimposed upon the DCVZ.

This was the first intercept of the DCVZ by VORTEX.  It is anticipated that
others will be completed during the summer season as we attempt to develop
a climatology of this terrain-induced feature and its role in convective
initiation.