Alert archive / Missouri / Mesoscale Discussions in 2014

Mesoscale Discussion 438

April 27, 2014Johnson County, Wyandotte County, Kansas; 41 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Apr 27, 2014, 8:40 PM CDT for Johnson County, Wyandotte County, Kansas; 41 counties in Missouri. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued
Apr 27, 2014, 8:40 PM CDT (01:40 UTC)
Expired
Apr 27, 2014, 9:45 PM CDT
In force
65 min
Issued by
the Storm Prediction Center
All 43 counties

Johnson County, KS, Wyandotte County, KS, Barry County, MO, Barton County, MO, Bates County, MO, Benton County, MO, Camden County, MO, Carroll County, MO, Cass County, MO, Cedar County, MO, Christian County, MO, Clay County, MO, Cooper County, MO, Dade County, MO, Dallas County, MO, Douglas County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Jackson County, MO, Jasper County, MO, Johnson County, MO, Laclede County, MO, Lafayette County, MO, Lawrence County, MO, McDonald County, MO, Miller County, MO, Moniteau County, MO, Morgan County, MO, Newton County, MO, Ozark County, MO, Pettis County, MO, Platte County, MO, Polk County, MO, Pulaski County, MO, Ray County, MO, Saline County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Vernon County, MO, Webster County, MO, Wright County, MO

The radar

The Springfield radar (KSGF), 83 km from the middle of the area, began a volume at 01:43 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, 1.7 hours before the alert went out and 124 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 2014-04-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 409 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 2014-04-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 353 square meters per square second.1939587897Sfc1 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
409 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
501 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
353 m²/s²
0-3 km storm-relative helicity
357 m²/s²
Significant tornado parameter
0.8
Supercell composite
6.8

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 27, 7:29 PM CDTMesoscale DiscussionSPCButler, Dunklin, Mississippi, New Madrid, Pemiscot, Ripley and 2 more91 min
Apr 27, 7:53 PM CDTTornado WatchSPCBollinger, Butler, Cape Girardeau, Carter, Dunklin, Mississippi and 7 more6 hr
Apr 27, 8:43 PM CDTMesoscale DiscussionSPCButler, Dunklin, Pemiscot62 min
Apr 27, 11:21 PM CDTMesoscale DiscussionSPCBarry, Camden, Christian, Dallas, Douglas, Greene and 13 more84 min
Apr 27, 11:41 PM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Dunklin, Mississippi, New Madrid and 4 more94 min
Apr 28, 1:43 AM CDTMesoscale DiscussionSPCCape Girardeau, Franklin, Gasconade, Iron, Jefferson, Madison and 7 more92 min
Apr 28, 1:43 AM CDTTornado WatchSPCDunklin, Pemiscot8 hr
Apr 28, 12:54 PM CDTMesoscale DiscussionSPCAudrain, Callaway, Clark, Crawford, Franklin, Gasconade and 19 more2 hr
Apr 28, 1:11 PM CDTTornado WatchSPCAudrain, Callaway, Clark, Crawford, Franklin, Gasconade and 16 more7 hr
Apr 28, 3:13 PM CDTMesoscale DiscussionSPCBollinger, Cape Girardeau, Mississippi, New Madrid, Perry, Scott and 1 more2 hr
Apr 28, 3:38 PM CDTMesoscale DiscussionSPCClark, Jefferson, Lincoln, Pike, Saint Charles, Saint Louis and 1 more2 hr

Nearby

Mesoscale Discussions in Missouri, 2014Mesoscale Discussions in Kansas, 2014Every mesoscale discussion in 2014

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.