(20 February 2012)
* *  Mike Umscheid PHOTOGRAPHY & STORM CHASE BLOG   * *


About This Shoot
Date: 20 February 2012
Location: North-central Kansas from Lincoln to Minneapolis to east of Concordia, KS
Shoot Type: Storm Chase
Rating:
Description: Winter hail storms & rainbow at sunset
Synopsis:
Sub-severe storms developed immediately ahead of a very cold upper low with -30C at its center. Surface temperature/dewpoint was around 55F/44F over the warm sector, which still yielded about 600 J/kg of surface-based CAPE. The most excitment was photographing large quantities of 1/2" to 3/4" diameter hail in the town of Minneapolis (north of Salina, KS). I then photographed a fairly dramatic rainbow at sunset east of Concorida along Hwy 9.

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Preliminary Storm Reports from 20 February 2012


1630 UTC SPC Products from 20 February 2012


Categorical Convective Outlook

Probabilistic Tornado Outlook

Probabilistic Hail Outlook

Probabilistic Wind Outlook

Evening Meteorological Charts from 20 February 2012


250mb Chart

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20 February 2012


Mon, 20 Feb 2012 18:05:05 -0600
chase update 6pm. fun little hailstorm chase in north-central ks. hail covered road from penny size hail and a magnificent rainbow to conclude the chase east of concordia. Now heading home!

Mon, 20 Feb 2012 16:23:47 -0600
420p chase update. a cell just formed to my south near Beverly will watch this and follow it for a bit since it is right here

Mon, 20 Feb 2012 16:04:04 -0600
4pm chase update. Heading back to Dodge. Linear storms southeast of me doesn/t look like it/s worth the effort. Oh well, no regrets!

Mon, 20 Feb 2012 15:19:33 -0600
Ahh the first Convective cell of the season... All 17 thousand feet of it!
  
(click on thumbnail for pop-up of larger image)

Mon, 20 Feb 2012 11:06:58 -0600
11am chase update: in Grainfield doing a little more forecasting, going to head toward the Stockton-Osborne area next.

Mon, 20 Feb 2012 09:08:24 -0600
Chase Day Feb 20 Target: I-70 corridor Hays to Russell, KS area
A classic, compact and fast-moving upper low with an intense mid level
potential vorticity anomaly will be moving across Kansas today. 500mb
temperatures around the center of the closed low will be down to -30C!
It is so cold aloft that the surface warm nose of mid to upper 50s degF
over mid 40s degF would yield 500-700 J/kg of surface-based CAPE.
During the critical 20-22z time frame, the best potential vorticity
advection and resultant lower tropospheric response will most likely be
from Hays to Great Bend, KS. I am starting off at Goodland, so I will
be hitting the road here shortly at 9:30am or so in order to get down to
Hays-Russell by 12:30pm or so. Attached is a morning run of the RUC
model valid 21z with simulated reflectivity and the mid level PV anomaly
with surface winds. The other image is last night's NSSL WRF simulated
reflectivity run showing an arc of convection developing across central
KS by late afternoon.

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#2
(click on thumbnails for pop-up of larger images)

Sun, 19 Feb 2012 23:08:13 -0600
In Goodland.. impressive -30C at 500mb and -7C at 700mb, so 500-700 J/kg CAPE potential with a 55/44F surface parcel within the warm nose. Will narrow a target down in the morning.