Alert archive / Missouri / Mesoscale Discussions in 2016

Mesoscale Discussion 452

April 26, 20166 counties in Illinois; 46 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Apr 26, 2016, 10:03 AM CDT for 6 counties in Illinois; 46 counties in Missouri. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
Apr 26, 2016, 10:03 AM CDT (15:03 UTC)
Expired
Apr 26, 2016, 12:00 PM CDT
In force
117 min
Issued by
the Storm Prediction Center
All 52 counties

Calhoun County, IL, Greene County, IL, Jersey County, IL, Monroe County, IL, Randolph County, IL, Saint Clair County, IL, Audrain County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, Carroll County, MO, Chariton County, MO, City of Saint Louis, MO, Cole County, MO, Cooper County, MO, Crawford County, MO, Dallas County, MO, Dent County, MO, Franklin County, MO, Gasconade County, MO, Henry County, MO, Hickory County, MO, Howard County, MO, Iron County, MO, Jefferson County, MO, Johnson County, MO, Laclede County, MO, Lafayette County, MO, Lincoln County, MO, Maries County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pettis County, MO, Phelps County, MO, Pike County, MO, Polk County, MO, Pulaski County, MO, Ralls County, MO, Randolph County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Saline County, MO, St. Clair County, MO, Warren County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 114 km from the middle of the area, began a volume at 15:03 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, 3.1 hours before the alert went out and 250 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 2016-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2148 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 2016-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 232 square meters per square second.193958Sfc1 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
2148 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
669 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
232 m²/s²
0-3 km storm-relative helicity
236 m²/s²
Significant tornado parameter
0.0
Supercell composite
8.3

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 26, 11:52 AM CDTSevere Thunderstorm WatchSPCBond, Calhoun, Christian, Clay, Clinton, Effingham and 18 more7 hr
Apr 26, 12:58 PM CDTMesoscale DiscussionSPCCrawford, Lawrence3 hr
Apr 26, 2:42 PM CDTMesoscale DiscussionSPCAlexander, Bond, Clay, Clinton, Edwards, Fayette and 23 more2 hr
Apr 26, 3:03 PM CDTSevere Thunderstorm WatchSPCAlexander, Clark, Coles, Crawford, Cumberland, Edgar and 19 more6 hr
Apr 26, 2:18 AM CDTMesoscale DiscussionSPCAndrew, Buchanan, Caldwell, Carroll, Cass, Clay and 12 more117 min
Apr 26, 4:37 AM CDTMesoscale DiscussionSPCBuchanan, Cass, Clay, Clinton, Jackson, Johnson and 4 more83 min
Apr 26, 6:23 AM CDTSevere Thunderstorm WatchSPCAndrew, Audrain, Bates, Benton, Boone, Buchanan and 30 more7 hr
Apr 26, 7:18 AM CDTMesoscale DiscussionSPCAndrew, Boone, Buchanan, Caldwell, Carroll, Chariton and 16 more87 min
Apr 26, 6:14 PM CDTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Clay, Clinton, DeKalb and 3 more61 min

Nearby

Mesoscale Discussions in Missouri, 2016Mesoscale Discussions in Illinois, 2016Every mesoscale discussion in 2016

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.