Alert archive / Missouri / Mesoscale Discussions in 2013

Mesoscale Discussion 914

May 31, 201311 counties in Illinois; Crawford County, Labette County, Neosho County, Kansas; 25 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 31, 2013, 7:05 PM CDT for 11 counties in Illinois; Crawford County, Labette County, Neosho County, Kansas; 25 counties in Missouri. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued
May 31, 2013, 7:05 PM CDT (00:05 UTC)
Expired
May 31, 2013, 8:30 PM CDT
In force
85 min
Issued by
the Storm Prediction Center
All 39 counties

Bond County, IL, Calhoun County, IL, Christian County, IL, Greene County, IL, Jersey County, IL, Macon County, IL, Macoupin County, IL, Madison County, IL, Montgomery County, IL, Piatt County, IL, Sangamon County, IL, Crawford County, KS, Labette County, KS, Neosho County, KS, Barton County, MO, Benton County, MO, Camden County, MO, Cedar County, MO, City of Saint Louis, MO, Cole County, MO, Dade County, MO, Dallas County, MO, Franklin County, MO, Gasconade County, MO, Hickory County, MO, Jasper County, MO, Lincoln County, MO, Maries County, MO, Miller County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Polk County, MO, Pulaski County, MO, Saint Charles County, MO, Saint Louis County, MO, St. Clair County, MO, Vernon County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 133 km from the middle of the area, began a volume at 00:06 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, 0.1 hours before the alert went out and 218 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 2013-06-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2316 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 2013-06-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 136 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
2316 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
1144 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
136 m²/s²
0-3 km storm-relative helicity
210 m²/s²
Significant tornado parameter
3.0
Supercell composite
16.6

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
May 31, 7:23 PM CDTTornado WatchSPCChampaign, Christian, Clark, Clay, Coles, Crawford and 12 more6 hr
May 31, 8:46 PM CDTMesoscale DiscussionSPCBond, Clay, Clinton, Coles, Cumberland, Effingham and 16 more59 min
May 31, 9:37 PM CDTTornado WatchSPCAlexander, Clinton, Edwards, Franklin, Gallatin, Hamilton and 19 more6 hr
May 31, 9:47 PM CDTMesoscale DiscussionSPCIroquois58 min
May 31, 10:11 PM CDTTornado WatchSPCFord, Iroquois5 hr
Jun 1, 1:13 AM CDTMesoscale DiscussionSPCCrawford, Lawrence, Wabash2 hr
Jun 1, 1:51 AM CDTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 14 more114 min
Jun 1, 3:46 AM CDTMesoscale DiscussionSPCMassac29 min
Jun 1, 9:53 AM CDTMesoscale DiscussionSPCDunklin2 hr

Nearby

Mesoscale Discussions in Missouri, 2013Mesoscale Discussions in Illinois, 2013Mesoscale Discussions in Kansas, 2013Every mesoscale discussion in 2013

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.