Alert archive / Kansas / Mesoscale Discussions in 2013

Mesoscale Discussion 1649

August 7, 201328 counties in Kansas; 19 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Aug 7, 2013, 1:51 AM CDT for 28 counties in Kansas; 19 counties in Missouri. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued
Aug 7, 2013, 1:51 AM CDT (06:51 UTC)
Expired
Aug 7, 2013, 2:45 AM CDT
In force
54 min
Issued by
the Storm Prediction Center
Chance of a watch
80%
All 47 counties

Allen County, KS, Anderson County, KS, Atchison County, KS, Bourbon County, KS, Brown County, KS, Clay County, KS, Coffey County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Linn County, KS, Lyon County, KS, Marshall County, KS, Miami County, KS, Morris County, KS, Nemaha County, KS, Osage County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Woodson County, KS, Wyandotte County, KS, Andrew County, MO, Bates County, MO, Benton County, MO, Buchanan County, MO, Caldwell County, MO, Cass County, MO, Clay County, MO, Clinton County, MO, DeKalb County, MO, Henry County, MO, Holt County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Pettis County, MO, Platte County, MO, Ray County, MO, St. Clair County, MO, Vernon County, MO

The radar

The Pleasant Hill radar (KEAX), 81 km from the middle of the area, began a volume at 06:53 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 (KFOE), launched 00:00Z, 6.9 hours before the alert went out and 53 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 00:00Z on 2013-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3444 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 00:00Z on 2013-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 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
3444 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
980 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
99 m²/s²
Significant tornado parameter
1.4
Supercell composite
10.1

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
Aug 6, 9:36 PM CDTMesoscale DiscussionSPCAllen, Butler, Chautauqua, Cowley, Elk, Greenwood and 9 more54 min
Aug 6, 9:53 PM CDTSevere Thunderstorm WatchSPCAllen, Butler, Chase, Chautauqua, Cowley, Elk and 17 more5 hr
Aug 7, 2:12 AM CDTSevere Thunderstorm WatchSPCAnderson, Bourbon, Cherokee, Coffey, Crawford, Douglas and 16 more6 hr
Aug 7, 3:45 PM CDTMesoscale DiscussionSPCMorton, Seward, Stanton, Stevens105 min
Aug 7, 5:32 PM CDTSevere Thunderstorm WatchSPCClark, Finney, Ford, Grant, Gray, Greeley and 9 more7 hr
Aug 6, 9:37 PM CDTMesoscale DiscussionSPCAdair, Andrew, Atchison, Clark, Daviess, Gentry and 12 more113 min
Aug 7, 2:41 AM CDTMesoscale DiscussionSPCAdair, Clark, Grundy, Harrison, Knox, Mercer and 4 more2 hr
Aug 7, 5:32 AM CDTMesoscale DiscussionSPCAdair, Clark, Grundy, Harrison, Knox, Mercer and 4 more103 min
Aug 7, 6:36 AM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Crawford, Dent and 20 more114 min

Nearby

Mesoscale Discussions in Kansas, 2013Mesoscale Discussions in Missouri, 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.