Alert archive / Missouri / Mesoscale Discussions in 2011

Mesoscale Discussion 1284

June 18, 20115 states

The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2011, 7:41 PM CDT for 5 states. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued
Jun 18, 2011, 7:41 PM CDT (00:41 UTC)
Expired
Jun 18, 2011, 9:15 PM CDT
In force
94 min
Issued by
the Storm Prediction Center
All 102 counties

Baxter County, AR, Boone County, AR, Carroll County, AR, Clay County, AR, Craighead County, AR, Fulton County, AR, Greene County, AR, Izard County, AR, Lawrence County, AR, Marion County, AR, Mississippi County, AR, Randolph County, AR, Sharp County, AR, Monroe County, IL, Allen County, KS, Anderson County, KS, Bourbon 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, Miami County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Woodson County, KS, Barry County, MO, Barton County, MO, Bates County, MO, Benton County, MO, Bollinger County, MO, Butler County, MO, Callaway County, MO, Camden County, MO, Cape Girardeau County, MO, Carter County, MO, Cass 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, Dunklin County, MO, Franklin County, MO, Gasconade County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Howell County, MO, Iron County, MO, Jasper County, MO, Jefferson County, MO, Johnson County, MO, Laclede County, MO, Lawrence County, MO, Madison County, MO, Maries County, MO, McDonald County, MO, Miller County, MO, Moniteau County, MO, Morgan County, MO, New Madrid County, MO, Newton County, MO, Oregon County, MO, Osage County, MO, Ozark County, MO, Pemiscot County, MO, Perry 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, Scott County, MO, Shannon County, MO, St. Clair County, MO, Stoddard County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Vernon County, MO, Warren County, MO, Washington County, MO, Wayne County, MO, Webster County, MO, Wright County, MO, Craig County, OK, Nowata County, OK, Osage County, OK, Ottawa County, OK, Washington County, OK

The radar

The Springfield radar (KSGF), 12 km from the middle of the area, began a volume at 00:40 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, 0.7 hours before the alert went out and 49 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 2011-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4246 joules per kilogram.LCLEL10008507005003002001001 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 2011-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 121 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
4246 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
1103 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
121 m²/s²
0-3 km storm-relative helicity
183 m²/s²
Significant tornado parameter
3.1
Supercell composite
15.1

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 19, 2:14 AM CDTMesoscale DiscussionSPCClay, Fulton, Greene, Randolph61 min
Jun 18, 8:26 PM CDTSevere Thunderstorm WatchSPCBond, Calhoun, Clinton, Fayette, Greene, Jackson and 11 more8 hr
Jun 19, 2:55 AM CDTTornado WatchSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 13 more6 hr
Jun 19, 4:39 AM CDTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 11 more66 min
Jun 19, 5:46 AM CDTMesoscale DiscussionSPCCrawford, Edwards, Hardin, Jasper, Lawrence, Richland and 1 more59 min
Jun 19, 4:30 PM CDTMesoscale DiscussionSPCMassac, Pulaski30 min
Jun 19, 5:01 PM CDTTornado WatchSPCMassac5 hr
Jun 18, 8:54 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Clay, Cloud, Comanche and 31 more66 min
Jun 18, 9:25 PM CDTSevere Thunderstorm WatchSPCBarton, Chase, Clay, Cloud, Dickinson, Ellsworth and 21 more4 hr
Jun 18, 11:05 PM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Cherokee, Coffey, Crawford and 10 more85 min
Jun 19, 3:52 PM CDTMesoscale DiscussionSPCAtchison, Brown, Clay, Cloud, Decatur, Doniphan and 16 more113 min
Jun 19, 6:21 PM CDTMesoscale DiscussionSPCAtchison, Brown, Clay, Cloud, Dickinson, Doniphan and 22 more84 min
Jun 19, 6:51 PM CDTTornado WatchSPCAtchison, Brown, Clay, Cloud, Dickinson, Doniphan and 17 more7 hr
Jun 18, 8:19 PM CDTMesoscale DiscussionSPCBryan86 min
Jun 19, 2:16 PM CDTMesoscale DiscussionSPCHarmon59 min

Nearby

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