Alert archive / Missouri / Mesoscale Discussions in 2011

Mesoscale Discussion 530

April 23, 20114 states

The Storm Prediction Center issued this mesoscale discussion at Apr 23, 2011, 2:33 AM CDT for 4 states. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
Apr 23, 2011, 2:33 AM CDT (07:33 UTC)
Expired
Apr 23, 2011, 4:00 AM CDT
In force
87 min
Issued by
the Storm Prediction Center
All 43 counties

Benton County, AR, Boone County, AR, Carroll County, AR, Madison County, AR, Marion County, AR, Washington County, AR, Cherokee County, KS, Labette County, KS, Barry County, MO, Barton County, MO, Christian County, MO, Crawford County, MO, Dade County, MO, Dallas County, MO, Dent County, MO, Douglas County, MO, Greene County, MO, Howell County, MO, Jasper County, MO, Laclede County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Oregon County, MO, Ozark County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, Shannon County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Webster County, MO, Wright County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Delaware County, OK, Mayes County, OK, Muskogee County, OK, Ottawa County, OK, Rogers County, OK, Wagoner County, OK

The radar

The Springfield radar (KSGF), 46 km from the middle of the area, began a volume at 07:35 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 nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 7.6 hours before the alert went out and 9 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 2011-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2835 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 2011-04-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 231 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
2835 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
640 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
231 m²/s²
0-3 km storm-relative helicity
254 m²/s²
Significant tornado parameter
4.7
Supercell composite
18.1

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 22, 7:29 PM CDTMesoscale DiscussionSPCBaxter, Boone, Clay, Fulton, Greene, Izard and 7 more91 min
Apr 22, 8:09 PM CDTMesoscale DiscussionSPCBenton, Carroll, Crawford, Madison, Washington96 min
Apr 22, 9:39 PM CDTMesoscale DiscussionSPCCarroll, Crawford, Franklin, Madison, Sebastian, Washington66 min
Apr 22, 11:04 PM CDTSevere Thunderstorm WatchSPCBaxter, Benton, Boone, Carroll, Madison, Marion and 3 more7 hr
Apr 22, 11:10 PM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Crawford, Franklin and 4 more2 hr
Apr 23, 5:06 AM CDTMesoscale DiscussionSPCBenton, Boone, Carroll, Madison, Marion, Newton and 1 more24 min
Apr 23, 1:04 PM CDTMesoscale DiscussionSPCClay, Craighead, Mississippi86 min
Apr 23, 5:02 PM CDTMesoscale DiscussionSPCBaxter, Clay, Cleburne, Conway, Craighead, Crawford and 21 more58 min
Apr 23, 5:09 PM CDTMesoscale DiscussionSPCBaxter, Clay, Fulton, Randolph2 hr
Apr 23, 5:38 PM CDTSevere Thunderstorm WatchSPCBaxter, Benton, Boone, Carroll, Clay, Cleburne and 30 more6 hr
Apr 22, 9:20 PM CDTMesoscale DiscussionSPCBollinger, Cape Girardeau, Iron, Jefferson, Madison, Mississippi and 9 more55 min
Apr 23, 1:04 AM CDTTornado WatchSPCBollinger, Butler, Cape Girardeau, Carter, Crawford, Iron and 11 more4 hr
Apr 23, 3:41 AM CDTMesoscale DiscussionSPCBollinger, Cape Girardeau, Madison, Mississippi, Perry, Sainte Genevieve and 3 more94 min
Apr 22, 11:35 PM CDTSevere Thunderstorm WatchSPCAtoka, Carter, Cleveland, Coal, Comanche, Cotton and 19 more4 hr
Apr 23, 2:08 AM CDTMesoscale DiscussionSPCLatimer, LeFlore, Pittsburg, Pushmataha67 min
Apr 23, 12:56 PM CDTMesoscale DiscussionSPCBryan, Carter, Choctaw, Jefferson, Johnston, Love and 2 more64 min
Apr 23, 3:05 PM CDTSevere Thunderstorm WatchSPCAtoka, Bryan, Carter, Choctaw, Coal, Cotton and 11 more9 hr

Nearby

Mesoscale Discussions in Missouri, 2011Mesoscale Discussions in Oklahoma, 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.