Chase Trip Day 9 (June 24) Summary: Part 1 -- Casper, WY Supercell, Guernsey left split storm, followed by Laramie Peak storms
* *  Mike Umscheid PHOTOGRAPHY & STORM CHASE BLOG   * *

Sat, 25 Jun 2011 10:13:58 -0500
Chase Trip Day 9 (June 24) Summary: Part 1 -- Casper, WY Supercell, Guernsey left split storm, followed by Laramie Peak storms
Summary & Images (part 1)
Jay Antle and I intercepted the first storm of the day as we drove
south out of Buffalo, WY. We met the first storm near Casper and
followed it southeast along I-25 stopping occasionally for
photographs. At Douglas, we decided to continue south as the southern
end of the storm was supercellular and another more linear storm was
beginning to tear off more toward the east and northeast. This
northern storm actually ended up becoming dominant as it rolled east
through Lusk and Harrison (our original target area) and eventually on
into northern Nebraska later in the evening. Other storms forming off
of the southern Laramie Mountains were moving northeast while the
supercell we were following was moving southeast. This interacted
with the southern storms and the process ended up being destructive to
pretty much all convection in terms of supercell structure. A cool
looking left-split storm moved northeast quickly toward Guernsey which
had a pretty white hail core to our southeast. We let all this stuff
try to sort itself out around Guernsey, but it never did and it all
eventually just died. New storms were forming over the Laramie
Mountains near Laramie Peak which caught our eye, so we went back west
to the interstate at Dwyer Junction. We drove north a few miles and
stopped to watch one of the storms roll off Laramie Peak. The
cloud-to-ground lightning was infrequent, but I managed to capture one
of the flashes to the west with Laramie Peak in the background.
Afterwards, we followed this weak storm east as it sputtered along the
way to Torrington and Scottsbluff... where we ultimately called it a
chase and had mexican dinner. While eating, a new supercell formed
just southwest of Scottsbluff, and we took a peak outside every so
often during meal to observe the incoming storm. We drove back to the
motel and watched the storm roll over us with some 1/2" diameter hail
at our motel on the east side of Scottsbluff. Later in the evening,
new storms formed to the west of Scottsbluff which we set out to chase
for lightning photography. See part 2 below.

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#2

#3
(click on thumbnails for pop-up of larger images)