Alert archive / Kansas / Mesoscale Discussions in 2012

Mesoscale Discussion 602

April 27, 201228 counties in Kansas; Barton County, Bates County, Vernon County, Missouri

The Storm Prediction Center issued this mesoscale discussion at Apr 27, 2012, 6:16 AM CDT for 28 counties in Kansas; Barton County, Bates County, Vernon County, Missouri. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued
Apr 27, 2012, 6:16 AM CDT (11:16 UTC)
Expired
Apr 27, 2012, 7:15 AM CDT
In force
59 min
Issued by
the Storm Prediction Center
All 31 counties

Allen County, KS, Anderson County, KS, Bourbon County, KS, Butler County, KS, Chase County, KS, Coffey County, KS, Crawford County, KS, Dickinson County, KS, Douglas County, KS, Elk County, KS, Franklin County, KS, Geary County, KS, Greenwood County, KS, Harvey County, KS, Linn County, KS, Lyon County, KS, Marion County, KS, McPherson County, KS, Miami County, KS, Morris County, KS, Neosho County, KS, Osage County, KS, Ottawa County, KS, Saline County, KS, Shawnee County, KS, Wabaunsee County, KS, Wilson County, KS, Woodson County, KS, Barton County, MO, Bates County, MO, Vernon County, MO

The radar

The Topeka radar (KTWX), 91 km from the middle of the area, began a volume at 11:17 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 11.3 hours before the alert went out and 211 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Lamont, OK at 00:00Z on 2012-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lamont, OK at 00:00Z on 2012-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -27 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2760 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
-27 m²/s²
0-3 km storm-relative helicity
215 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 26, 9:41 PM CDTMesoscale DiscussionSPCCheyenne, Grant, Greeley, Hamilton, Kearny, Logan and 7 more2 hr
Apr 26, 10:00 PM CDTSevere Thunderstorm WatchSPCCheyenne, Grant, Greeley, Hamilton, Kearny, Logan and 8 more7 hr
Apr 27, 2:24 AM CDTMesoscale DiscussionSPCCheyenne, Grant, Greeley, Hamilton, Kearny, Morton and 5 more2 hr
Apr 27, 4:43 AM CDTMesoscale DiscussionSPCCheyenne, Grant, Greeley, Hamilton, Haskell, Kearny and 8 more32 min
Apr 27, 10:15 AM CDTMesoscale DiscussionSPCBarber, Barton, Butler, Cowley, Dickinson, Ellis and 21 more2 hr
Apr 27, 1:29 PM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Butler, Chase, Chautauqua and 34 more91 min
Apr 27, 2:11 PM CDTTornado WatchSPCAllen, Anderson, Bourbon, Butler, Chase, Chautauqua and 46 more7 hr
Apr 27, 3:44 PM CDTMesoscale DiscussionSPCAllen, Anderson, Butler, Chase, Chautauqua, Clay and 22 more61 min
Apr 27, 6:07 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Brown, Cherokee and 32 more113 min

Nearby

Mesoscale Discussions in Kansas, 2012Mesoscale Discussions in Missouri, 2012Every mesoscale discussion in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.