Alert archive / Missouri / Mesoscale Discussions in 2011

Mesoscale Discussion 1226

June 15, 201119 counties in Arkansas; 48 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jun 15, 2011, 12:29 AM CDT for 19 counties in Arkansas; 48 counties in Missouri. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 15, 2011, 12:29 AM CDT (05:29 UTC)
Expired
Jun 15, 2011, 2:30 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 67 counties

Baxter County, AR, Boone County, AR, Carroll County, AR, Clay County, AR, Cleburne County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Johnson County, AR, Lawrence County, AR, Marion County, AR, Newton County, AR, Pope County, AR, Randolph County, AR, Searcy County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, Benton County, MO, Bollinger County, MO, Butler County, MO, Camden County, MO, Carter County, MO, Cedar County, MO, Christian County, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Dade County, MO, Dallas County, MO, Dent County, MO, Douglas County, MO, Franklin County, MO, Gasconade County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Howell County, MO, Iron County, MO, Jefferson County, MO, Laclede County, MO, Madison County, MO, Maries County, MO, Miller County, MO, Moniteau County, MO, Morgan County, MO, Oregon County, MO, Osage County, MO, Ozark County, MO, Pettis County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Shannon County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Washington County, MO, Wayne County, MO, Webster County, MO, Wright County, MO

The radar

The Springfield radar (KSGF), 117 km from the middle of the area, began a volume at 05:29 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

Springfield, MO (KSGF), launched 00:00Z, 5.5 hours before the alert went out and 151 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, Springfield, MO at 00:00Z on 2011-06-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2959 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, Springfield, MO at 00:00Z on 2011-06-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 205 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
2959 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
1347 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
205 m²/s²
0-3 km storm-relative helicity
240 m²/s²
Significant tornado parameter
1.7
Supercell composite
14.6

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 15, 1:09 AM CDTSevere Thunderstorm WatchSPCBaxter, Boone, Clay, Cleburne, Conway, Craighead and 19 more4 hr
Jun 15, 4:24 AM CDTMesoscale DiscussionSPCClay96 min
Jun 15, 10:54 AM CDTMesoscale DiscussionSPCArkansas, Crittenden, Desha, Lee, Mississippi, Monroe and 2 more2 hr
Jun 15, 1:57 PM CDTMesoscale DiscussionSPCClark, Garland, Hempstead, Hot Spring, Howard, Little River and 9 more63 min
Jun 14, 7:47 PM CDTMesoscale DiscussionSPCAdair, Andrew, Audrain, Bates, Benton, Boone and 43 more58 min
Jun 14, 8:54 PM CDTMesoscale DiscussionSPCNewton66 min
Jun 14, 9:11 PM CDTMesoscale DiscussionSPCBarry, Barton, Camden, Cedar, Christian, Dade and 23 more64 min
Jun 15, 1:55 AM CDTMesoscale DiscussionSPCAdair, Clark, Knox, Lewis, Marion, Monroe and 5 more3 hr
Jun 15, 2:13 PM CDTMesoscale DiscussionSPCCape Girardeau, Mississippi, Perry, Scott2 hr

Nearby

Mesoscale Discussions in Missouri, 2011Mesoscale Discussions in Arkansas, 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.