Alert archive / Missouri / Mesoscale Discussions in 2011

Mesoscale Discussion 1888

August 7, 20115 states

The Storm Prediction Center issued this mesoscale discussion at Aug 7, 2011, 5:20 PM CDT for 5 states. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued
Aug 7, 2011, 5:20 PM CDT (22:20 UTC)
Expired
Aug 7, 2011, 7:15 PM CDT
In force
115 min
Issued by
the Storm Prediction Center
All 86 counties

Benton County, AR, Bond County, IL, Calhoun County, IL, Clinton County, IL, Franklin County, IL, Jackson County, IL, Jefferson County, IL, Jersey County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Perry County, IL, Randolph County, IL, Saint Clair County, IL, Union County, IL, Washington County, IL, Williamson County, IL, Allen County, KS, Bourbon County, KS, Cherokee County, KS, Crawford County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Woodson County, KS, Barry County, MO, Barton County, MO, Benton County, MO, Bollinger County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, Cape Girardeau County, MO, Cedar County, MO, Christian County, MO, City of Saint Louis, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Dade County, MO, Dallas County, MO, Dent County, MO, Franklin County, MO, Gasconade County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Iron County, MO, Jasper County, MO, Jefferson County, MO, Laclede County, MO, Lawrence County, MO, Lincoln County, MO, Madison County, MO, Maries County, MO, McDonald County, MO, Miller County, MO, Moniteau County, MO, Montgomery County, MO, Morgan County, MO, Newton County, MO, Osage County, MO, Perry County, MO, Pettis County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, St. Clair County, MO, Texas County, MO, Vernon County, MO, Warren County, MO, Washington County, MO, Webster County, MO, Wright County, MO, Craig County, OK, Delaware County, OK, Mayes County, OK, Nowata County, OK, Ottawa County, OK, Rogers County, OK

The radar

The Springfield radar (KSGF), 95 km from the middle of the area, began a volume at 22:21 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 12:00Z, 10.3 hours before the alert went out and 147 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 12:00Z on 2011-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1116 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 12:00Z on 2011-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 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
1116 J/kg
Mixed-layer CIN
-131 J/kg
Mixed-layer LCL
1673 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
44 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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
Aug 7, 1:46 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 36 more119 min
Aug 7, 6:07 PM CDTSevere Thunderstorm WatchSPCBenton, Carroll5 hr
Aug 6, 10:14 PM CDTSevere Thunderstorm WatchSPCAdams, Brown, Hancock, Henderson, McDonough, Mercer and 3 more5 hr
Aug 6, 11:06 PM CDTMesoscale DiscussionSPCAdams, Brown, Fulton, Hancock, Henderson, McDonough and 4 more114 min
Aug 7, 11:14 AM CDTMesoscale DiscussionSPCChampaign, Clark, Coles, Crawford, Cumberland, Douglas and 8 more2 hr
Aug 7, 5:41 PM CDTSevere Thunderstorm WatchSPCAlexander, Bond, Calhoun, Clinton, Edwards, Franklin and 23 more6 hr
Aug 7, 10:48 AM CDTMesoscale DiscussionSPCAnderson, Atchison, Barton, Chase, Clay, Cloud and 33 more117 min
Aug 7, 12:55 PM CDTSevere Thunderstorm WatchSPCAtchison, Douglas, Jackson, Jefferson, Johnson, Leavenworth and 6 more5 hr
Aug 7, 2:21 PM CDTMesoscale DiscussionSPCClark, Comanche, Haskell, Meade, Seward, Stevens114 min
Aug 7, 3:16 PM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Coffey, Crawford, Douglas and 7 more119 min
Aug 7, 3:29 PM CDTSevere Thunderstorm WatchSPCBourbon, Crawford6 hr
Aug 6, 8:10 PM CDTMesoscale DiscussionSPCAndrew, Atchison, Daviess, DeKalb, Gentry, Grundy and 8 more2 hr

Nearby

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