Alert archive / Missouri / Mesoscale Discussions in 2011

Mesoscale Discussion 516

April 22, 201146 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2011, 1:04 PM CDT for 46 counties in Missouri. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued
Apr 22, 2011, 1:04 PM CDT (18:04 UTC)
Expired
Apr 22, 2011, 3:00 PM CDT
In force
116 min
Issued by
the Storm Prediction Center
All 46 counties

Barry County, MO, Barton County, MO, Benton County, MO, Callaway County, MO, Camden 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, Hickory County, MO, Howell County, MO, Jasper County, MO, Jefferson County, MO, Laclede County, MO, Lawrence County, MO, Maries County, MO, McDonald County, MO, Miller County, MO, Moniteau County, MO, Morgan County, MO, Newton County, MO, Osage County, MO, Ozark County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, Saint Charles County, MO, Saint Louis County, MO, Shannon County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Vernon County, MO, Warren County, MO, Washington County, MO, Webster County, MO, Wright County, MO

The radar

The Springfield radar (KSGF), 103 km from the middle of the area, began a volume at 18:06 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 12:00Z, 6.1 hours before the alert went out and 153 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 2011-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 148 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 2011-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 516 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
148 J/kg
Mixed-layer CIN
-391 J/kg
Mixed-layer LCL
454 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
516 m²/s²
0-3 km storm-relative helicity
554 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.1

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
Apr 21, 11:27 PM CDTMesoscale DiscussionSPCBarton, Bates, Buchanan, Cass, Clay, Jackson and 3 more3 hr
Apr 22, 2:48 AM CDTSevere Thunderstorm WatchSPCAndrew, Bates, Buchanan, Cass, Clay, Clinton and 4 more4 hr
Apr 22, 5:18 AM CDTMesoscale DiscussionSPCBuchanan, Caldwell, Cass, Clay, Clinton, Jackson and 2 more87 min
Apr 22, 10:09 AM CDTMesoscale DiscussionSPCBollinger, Cape Girardeau, Crawford, Dent, Franklin, Gasconade and 17 more66 min
Apr 22, 10:44 AM CDTMesoscale DiscussionSPCBarry, Bollinger, Carter, Christian, Crawford, Dent and 19 more61 min
Apr 22, 1:23 PM CDTMesoscale DiscussionSPCMcDonald, Newton97 min
Apr 22, 3:34 PM CDTTornado WatchSPCAudrain, Barry, Benton, Boone, Callaway, Camden and 46 more6 hr
Apr 22, 5:21 PM CDTMesoscale DiscussionSPCAudrain, Barry, Boone, Callaway, Camden, Christian and 36 more114 min
Apr 22, 5:27 PM CDTMesoscale DiscussionSPCCape Girardeau, Perry, Sainte Genevieve, Saint Francois33 min
Apr 22, 5:49 PM CDTTornado WatchSPCBollinger, Butler, Cape Girardeau, Carter, Iron, Madison and 9 more7 hr

Nearby

Mesoscale Discussions in Missouri, 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.