Alert archive / Kansas / Mesoscale Discussions in 2011

Mesoscale Discussion 1279

June 18, 201116 counties in Kansas; 14 counties in Missouri; 5 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2011, 3:34 PM CDT for 16 counties in Kansas; 14 counties in Missouri; 5 counties in Oklahoma. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued
Jun 18, 2011, 3:34 PM CDT (20:34 UTC)
Expired
Jun 18, 2011, 5:30 PM CDT
In force
116 min
Issued by
the Storm Prediction Center
All 35 counties

Allen County, KS, Anderson County, KS, Bourbon County, KS, Butler County, KS, Chautauqua County, KS, Cherokee County, KS, Cowley County, KS, Crawford County, KS, Elk County, KS, Greenwood County, KS, Labette County, KS, Linn County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Woodson County, KS, Barton County, MO, Bates County, MO, Benton County, MO, Cass County, MO, Cedar County, MO, Dade County, MO, Henry County, MO, Hickory County, MO, Jasper County, MO, Lawrence County, MO, Newton County, MO, Polk County, MO, St. Clair County, MO, Vernon County, MO, Craig County, OK, Nowata County, OK, Osage County, OK, Ottawa County, OK, Washington County, OK

The radar

The Pleasant Hill radar (KEAX), 128 km from the middle of the area, began a volume at 20:34 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 8.6 hours before the alert went out and 155 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 2011-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 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 2011-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -203 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
2 J/kg
Mixed-layer CIN
-487 J/kg
Mixed-layer LCL
1381 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
-203 m²/s²
0-3 km storm-relative helicity
-151 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
Jun 17, 8:19 PM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Atchison, Barton, Bourbon, Brown and 67 more7 hr
Jun 17, 8:27 PM CDTMesoscale DiscussionSPCFinney, Greeley, Hamilton, Kearny, Logan, Scott and 2 more93 min
Jun 17, 11:12 PM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Butler, Chase, Clay and 45 more93 min
Jun 18, 2:07 AM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Barton, Bourbon, Brown and 49 more53 min
Jun 18, 1:31 PM CDTSevere Thunderstorm WatchSPCCheyenne, Greeley, Sherman, Wallace7 hr
Jun 18, 5:15 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Gove, Greeley, Hamilton, Kearny and 8 more90 min
Jun 18, 5:36 PM CDTSevere Thunderstorm WatchSPCDecatur, Edwards, Ellis, Finney, Ford, Gove and 20 more7 hr
Jun 18, 6:03 PM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Bourbon, Butler, Chautauqua, Cherokee and 20 more10 hr
Jun 18, 2:44 AM CDTSevere Thunderstorm WatchSPCAudrain, Benton, Boone, Callaway, Camden, Carroll and 40 more5 hr
Jun 18, 5:39 AM CDTMesoscale DiscussionSPCAudrain, Bollinger, Boone, Callaway, Camden, Cape Girardeau and 36 more66 min
Jun 18, 9:39 AM CDTSevere Thunderstorm WatchSPCDunklin, Pemiscot7 hr
Jun 18, 3:24 PM CDTMesoscale DiscussionSPCJefferson, Stephens66 min
Jun 18, 3:54 PM CDTSevere Thunderstorm WatchSPCBryan, Carter, Cleveland, Coal, Garvin, Hughes and 10 more7 hr

Nearby

Mesoscale Discussions in Kansas, 2011Mesoscale Discussions in Missouri, 2011Mesoscale Discussions in Oklahoma, 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.