Alert archive / Kansas / Mesoscale Discussions in 2011

Mesoscale Discussion 1596

July 12, 201145 counties in Kansas; 32 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jul 12, 2011, 4:33 PM CDT for 45 counties in Kansas; 32 counties in Missouri. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
Jul 12, 2011, 4:33 PM CDT (21:33 UTC)
Expired
Jul 12, 2011, 6:00 PM CDT
In force
87 min
Issued by
the Storm Prediction Center
All 77 counties

Allen County, KS, Anderson County, KS, Atchison County, KS, Bourbon County, KS, Butler County, KS, Chase County, KS, Cherokee County, KS, Clay County, KS, Cloud County, KS, Coffey County, KS, Crawford County, KS, Dickinson County, KS, Doniphan County, KS, Douglas County, KS, Elk County, KS, Franklin County, KS, Geary County, KS, Greenwood County, KS, Harvey County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Labette County, KS, Leavenworth County, KS, Linn County, KS, Lyon County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Miami County, KS, Montgomery County, KS, Morris County, KS, Nemaha County, KS, Neosho County, KS, Osage County, KS, Ottawa County, KS, Pottawatomie County, KS, Riley County, KS, Saline County, KS, Sedgwick County, KS, Shawnee County, KS, Wabaunsee County, KS, Wilson County, KS, Woodson County, KS, Wyandotte County, KS, Barton County, MO, Bates County, MO, Benton County, MO, Buchanan County, MO, Camden County, MO, Cass County, MO, Cedar County, MO, Clay County, MO, Clinton County, MO, Cole County, MO, Cooper County, MO, Dade County, MO, Dallas County, MO, Henry County, MO, Hickory County, MO, Jackson County, MO, Jasper County, MO, Johnson County, MO, Laclede County, MO, Lafayette County, MO, Miller County, MO, Moniteau County, MO, Morgan County, MO, Osage County, MO, Pettis County, MO, Platte County, MO, Polk County, MO, Pulaski County, MO, Ray County, MO, Saline County, MO, St. Clair County, MO, Vernon County, MO

The radar

The Topeka radar (KTWX), 90 km from the middle of the area, began a volume at 21:35 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

Topeka, KS (KTOP), launched 12:00Z, 9.6 hours before the alert went out and 66 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, Topeka, KS at 12:00Z on 2011-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1505 joules per kilogram.LCLLFCEL10008507005003002001001 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, Topeka, KS at 12:00Z on 2011-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -37 square meters per square second.1939Sfc1 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
1505 J/kg
Mixed-layer CIN
-149 J/kg
Mixed-layer LCL
2048 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
-37 m²/s²
0-3 km storm-relative helicity
-18 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
Jul 12, 1:00 PM CDTMesoscale DiscussionSPCAudrain, Clark, Franklin, Jefferson, Knox, Lewis and 13 more2 hr
Jul 12, 1:45 PM CDTSevere Thunderstorm WatchSPCAdair, Audrain, Boone, Callaway, Chariton, Clark and 22 more7 hr
Jul 12, 3:48 PM CDTMesoscale DiscussionSPCJefferson, Lincoln, Marion, Pike, Ralls, Saint Charles and 2 more87 min
Jul 12, 6:43 PM CDTMesoscale DiscussionSPCAudrain, Boone, Callaway, Chariton, Franklin, Howard and 16 more62 min

Nearby

Mesoscale Discussions in Kansas, 2011Mesoscale Discussions in Missouri, 2011Every mesoscale discussion in 2011

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.