Alert archive / Missouri / Mesoscale Discussions in 2013

Mesoscale Discussion 724

May 20, 20139 counties in Kansas; 10 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 20, 2013, 8:46 AM CDT for 9 counties in Kansas; 10 counties in Missouri. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued
May 20, 2013, 8:46 AM CDT (13:46 UTC)
Expired
May 20, 2013, 9:45 AM CDT
In force
59 min
Issued by
the Storm Prediction Center
Chance of a watch
40%

Counties Allen County, KS, Anderson County, KS, Bourbon County, KS, Coffey County, KS, Linn County, KS, Miami County, KS, Neosho County, KS, Wilson County, KS, Woodson County, KS, Bates County, MO, Benton County, MO, Cass County, MO, Henry County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Pettis County, MO, St. Clair County, MO, Vernon County, MO

The radar

The Pleasant Hill radar (KEAX), 58 km from the middle of the area, began a volume at 13:45 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

Topeka, KS (KTOP), launched 12:00Z, 1.8 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, Topeka, KS at 12:00Z on 2013-05-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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, Topeka, KS at 12:00Z on 2013-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1307 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
143 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 19, 7:55 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Brown, Chautauqua, Clay and 35 more65 min
May 19, 9:34 PM CDTMesoscale DiscussionSPCChautauqua, Labette, Montgomery, Neosho, Wilson26 min
May 19, 10:16 PM CDTMesoscale DiscussionSPCBourbon, Cherokee, Crawford59 min
May 19, 11:49 PM CDTMesoscale DiscussionSPCCherokee56 min
May 20, 2:44 AM CDTMesoscale DiscussionSPCChautauqua, Cherokee, Labette, Montgomery2 hr
May 20, 12:26 PM CDTMesoscale DiscussionSPCAllen, Bourbon, Chautauqua, Cherokee, Crawford, Elk and 6 more2 hr
May 20, 12:46 PM CDTTornado WatchSPCAllen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 13 more8 hr
May 20, 2:31 PM CDTMesoscale DiscussionSPCAllen, Chautauqua, Cherokee, Crawford, Elk, Labette and 4 more119 min
May 19, 7:13 PM CDTMesoscale DiscussionSPCClark62 min
May 19, 8:10 PM CDTTornado WatchSPCClark, Scotland6 hr
May 20, 3:27 PM CDTMesoscale DiscussionSPCAudrain, Lincoln, Marion, Monroe, Montgomery, Pike and 2 more63 min
May 20, 5:07 PM CDTMesoscale DiscussionSPCAudrain, Crawford, Franklin, Gasconade, Lincoln, Marion and 8 more23 min
May 20, 5:24 PM CDTTornado WatchSPCAudrain, Boone, Callaway, Clark, Cole, Crawford and 20 more7 hr
May 20, 5:38 PM CDTMesoscale DiscussionSPCAndrew, DeKalb, Gentry, Harrison, Worth67 min
May 20, 6:53 PM CDTMesoscale DiscussionSPCCarter, Dent, Douglas, Howell, Iron, Madison and 8 more67 min

Nearby

Mesoscale Discussions in Missouri, 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.