Alert archive / Kansas / Mesoscale Discussions in 2007

Mesoscale Discussion 729

May 6, 200734 counties in Kansas; 5 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 6, 2007, 5:38 PM CDT for 34 counties in Kansas; 5 counties in Missouri. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued
May 6, 2007, 5:38 PM CDT (22:38 UTC)
Expired
May 6, 2007, 6:45 PM CDT
In force
67 min
Issued by
the Storm Prediction Center
All 39 counties

Allen County, KS, Anderson County, KS, Bourbon County, KS, Butler County, KS, Chase County, KS, Chautauqua County, KS, Coffey County, KS, Cowley County, KS, Crawford County, KS, Dickinson County, KS, Douglas County, KS, Elk County, KS, Franklin County, KS, Geary County, KS, Greenwood County, KS, Harvey County, KS, Johnson County, KS, Linn County, KS, Lyon County, KS, Marion County, KS, McPherson County, KS, Miami County, KS, Montgomery County, KS, Morris County, KS, Neosho County, KS, Osage County, KS, Saline County, KS, Sedgwick County, KS, Shawnee County, KS, Sumner County, KS, Wabaunsee County, KS, Wilson County, KS, Woodson County, KS, Wyandotte County, KS, Barton County, MO, Bates County, MO, Cass County, MO, Jackson County, MO, Vernon County, MO

The radar

The Topeka radar (KTWX), 85 km from the middle of the area, began a volume at 22:38 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

Lamont, OK (KLMN), launched 12:00Z, 10.6 hours before the alert went out and 208 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, Lamont, OK at 12:00Z on 2007-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2828 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, Lamont, OK at 12:00Z on 2007-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 227 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
2828 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
674 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
227 m²/s²
0-3 km storm-relative helicity
193 m²/s²
Significant tornado parameter
2.7
Supercell composite
11.6

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 5, 7:22 PM CDTTornado WatchSPCAtchison, Doniphan9 hr
May 5, 8:18 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Butler, Chase, Coffey and 18 more57 min
May 5, 9:08 PM CDTTornado Watch PDSSPCAnderson, Barber, Barton, Brown, Butler, Chase and 64 more7 hr
May 5, 11:24 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Cloud, Comanche, Edwards and 23 more66 min
May 6, 1:50 AM CDTMesoscale DiscussionSPCAnderson, Atchison, Barber, Barton, Brown, Butler and 48 more85 min
May 6, 7:10 AM CDTMesoscale DiscussionSPCCoffey, Franklin, Johnson, Wyandotte95 min
May 6, 9:19 AM CDTTornado WatchSPCAllen, Bourbon, Chautauqua, Cherokee, Cowley, Crawford and 8 more5 hr
May 6, 11:41 AM CDTMesoscale DiscussionSPCAllen, Anderson, Barber, Barton, Bourbon, Butler and 36 more94 min
May 6, 1:47 PM CDTMesoscale DiscussionSPCClark58 min
May 6, 1:59 PM CDTTornado WatchSPCAllen, Barber, Bourbon, Butler, Chautauqua, Cherokee and 25 more8 hr
May 6, 6:00 PM CDTSevere Thunderstorm WatchSPCAnderson, Chase, Clay, Cloud, Coffey, Dickinson and 18 more7 hr
May 5, 9:16 PM CDTMesoscale DiscussionSPCAtchison, Gentry, Harrison, Holt, Nodaway, Worth59 min
May 6, 4:08 AM CDTMesoscale DiscussionSPCAdair, Buchanan, Caldwell, Carroll, Clay, Clinton and 18 more2 hr
May 6, 4:40 AM CDTSevere Thunderstorm WatchSPCAdair, Daviess, Grundy, Harrison, Mercer, Putnam and 2 more4 hr

Nearby

Mesoscale Discussions in Kansas, 2007Mesoscale Discussions in Missouri, 2007Every mesoscale discussion in 2007

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.