(25 June 2011)
* *  Mike Umscheid PHOTOGRAPHY & STORM CHASE BLOG   * *


About This Shoot
Date: 25 June 2011
Location: Cheyenne Ridge area near the Wyoming/Colorado/Nebraska border from near Meriden, WY to Kimball, NE to Sedgwick, CO
Shoot Type: Storm Chase
Rating:
Description: Very photogenic, classic high-based supercell
Synopsis:
After chasing the initial storms that formed off the Laramie Mountains northeast of Cheyenne, Jay and I were intrigued by the area along an outflow boundary along the I-80 corridor for new supercell initiation. A supercell did form north of Kimball and we followed it east along farm roads north of I-80 and eventually southeast toward the Cheyenne Ridge south of Sidney. The structure was classic throughout, with numerous fairly rapidly rotating wall clouds and funnels.

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Preliminary Storm Reports from 25 June 2011


1630 UTC SPC Products from 25 June 2011


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Evening Meteorological Charts from 25 June 2011


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25 June 2011


Fri, 1 Jul 2011 21:20:35 -0500
Chase Trip Day 10 (June 25) Summary: Kimball-Sidney, Nebraska high-based supercell
Summary & Images (part 1)
Jay Antle and I intercepted an awesome supercell on Day 10 of this
storm chase trip. Our target was east of the Laramie Mountains as
fairly high CAPE was lurking over the eastern Nebraska Panhandle with
upslope winds increasing by late afternoon and early evening. After
spending some time at Scottsbluff National Monument early in the
afternoon, we set sights on mid afternoon storm development northeast
of Cheyenne. The first storms developed over northern Laramie county
and we drove southwest from LaGrange along Hwy 85 to observe these
first storms. The storms sputtered along as they moved east toward
the Harrisburg area. At Harrisburg, we had to make a decision what to
do next. There were storms trying to get organized up in the Lusk, WY
area well to the north, but what caught our eye more were new towers
forming to our southwest along the outflow boundary left behind from
the first storms that we were following. As a result, we went south
to Kimball. This ended up being a very good call as the group of
towers to our west-northwest organized into an awesome supercell. We
navigated farm roads northeast of Kimball with the storm updraft to
our west-northwest. We tried to remain in the sweet spot
east-southeast of the updraft about 8 to 10 miles to get the good
structure shots of the storm. The supercell cycled through numerous
mesocyclones with a number of wall clouds and occlusions observed. We
also saw a number of dusty spin-ups, mostly caused by RFD hitting the
surface, but one or two of them were fairly intense and cold have been
tornadic. Several persistent mid-level funnel clouds were also seen,
particularly as we were driving south back to Highway 30 northwest of
Sidney. But it was the structure of the storm itself that stole the
spotlight with amazing hues of aquamarine. The bell-shaped nature of
the updraft and the vault just downstream of the updraft itself were
amazing. As the sun was getting lower in the sky, we dropped south
toward the Cheyenne Ridge south of Sidney. More laminar banding of
the updraft was evident, taking on the classic "mothership" appearance
to the northwest. Anvil lightning was frequent overhead with the
persistent, harmonic sound of grumbling going on way up in the upper
troposphere. We continued to stay ahead of the storm south and east,
through the very large Peetz wind farm, and eventually down to Hwy 138
with darkness increasing after sunset. The supercell eventually faded
away late in the evening as it approached the Julesburg, CO and Big
Springs, NE area, but not before putting on a nice display of anvil
zits (short, intense spurts of lightning within the anvil). This
ended up being, for me, the most photogenic supercell of the 2011
season to date.

Below is a sequence of images of the early stages of the supercell
from north of Kimball to northwest of Sidney while we were on the farm
road grid north of Hwy 30:

#1

#2

#3

#4
(click on thumbnails for pop-up of larger images)

Fri, 1 Jul 2011 21:45:28 -0500
Chase Trip Day 10 (June 25) Summary: Kimball-Sidney, Nebraska high-based supercell (Images part 2)
Summary & Images (part 2)
Sequence of images of the Kimball-Sidney supercell during the good
"golden hour" light along and just south of I-80 to the Colorado
border south of Sidney:

#1

#2

#3

#4

#5

#6

#7

#8

#9
(click on thumbnails for pop-up of larger images)

Fri, 1 Jul 2011 22:07:01 -0500
Chase Trip Day 10 (June 25) Summary: Kimball-Sidney, Nebraska high-based supercell (Images part 3)
Summary & Images (part 3)
Sequence of images of the Kimball-Sidney supercell after sunset as
viewed from near the Peetz wind farm north of Crook, CO. The
supercell was shriveling up as it approached Chappell, NE and
eventually dying out towards Big Springs, NE area

#1

#2

#3

#4

#5

#6

#7

#8

#9

#10
(click on thumbnails for pop-up of larger images)

Sun, 26 Jun 2011 10:37:09 -0500
Kimball-Sidney, Nebraska Supercell at around sunset on 25 June 2011
  
(click on thumbnail for pop-up of larger image)

Sat, 25 Jun 2011 22:54:41 -0500
chase update 1052pm cdt. a very successful chase is drawing to an end.. top shelf supercell storm structure Kimball to Sidney, NE. Great in golden hour photography light

Sat, 25 Jun 2011 20:47:52 -0500
Sidney Nebraska Supercell a beauty!
  
(click on thumbnail for pop-up of larger image)

Sat, 25 Jun 2011 20:25:34 -0500
chase update 824pm cdt. Dangerous supercell moving toward Sidney, great structure, nice high-based rotating wall cloud, multiple cloud base rotations and high based small funnels

Sat, 25 Jun 2011 19:26:53 -0500
chase update 725pm cdt. amazing upside down wedding cake structure supercell updraft northwest of Dix, NE!!

Sat, 25 Jun 2011 19:11:00 -0500
Supercell structure rapidly forming north of kimball Nebraska
  
(click on thumbnail for pop-up of larger image)

Sat, 25 Jun 2011 18:17:12 -0500
chase update 615pm cdt. monitoring towering cumulus development along the east-west outflow boundary to the northwest from Kimball, NE. uptrend visually is good

Sat, 25 Jun 2011 17:31:31 -0500
chase update 530pm cdt. the storm near Harrisburg is dying. left out e-w outflow boundary with towering cumulus along it. heading S to Kimball.

Sat, 25 Jun 2011 16:27:51 -0500
chase update 425pm cdt. storms around the LaGrange, WY are struggling to reach the next level of strength. waiting for the atmosphere to give us a clue what to do next

Sat, 25 Jun 2011 14:07:27 -0500
chase update 205pm cdt. After visiting Scottsbluff Natl Monument we are heading toward Laramie County for todays storm chase target

Sat, 25 Jun 2011 12:04:16 -0500
Chase Trip Day 10th (June 25): do not have to go far today. More storms off Laramie Range. Good CAPE and shear again for supercells. Hang around scottsbluff thru aftn.