Alert archive / Missouri / Mesoscale Discussions in 2007

Mesoscale Discussion 733

May 6, 20074 states

The Storm Prediction Center issued this mesoscale discussion at May 6, 2007, 8:26 PM CDT for 4 states. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued
May 6, 2007, 8:26 PM CDT (01:26 UTC)
Expired
May 6, 2007, 9:30 PM CDT
In force
64 min
Issued by
the Storm Prediction Center
All 59 counties

Appanoose County, IA, Clarke County, IA, Davis County, IA, Decatur County, IA, Lucas County, IA, Ringgold County, IA, Taylor County, IA, Wayne County, IA, Atchison County, KS, Brown County, KS, Coffey County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Miami County, KS, Nemaha County, KS, Osage County, KS, Shawnee County, KS, Wyandotte County, KS, Adair County, MO, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Caldwell County, MO, Carroll County, MO, Cass County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Jackson County, MO, Johnson County, MO, Knox County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Mercer County, MO, Nodaway County, MO, Platte County, MO, Putnam County, MO, Ray County, MO, Saline County, MO, Schuyler County, MO, Scotland County, MO, Sullivan County, MO, Worth County, MO, Nemaha County, NE, Pawnee County, NE, Richardson County, NE

The radar

The Pleasant Hill radar (KEAX), 122 km from the middle of the area, began a volume at 01:28 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 00:00Z, 1.4 hours before the alert went out and 138 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 2007-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 224 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 2007-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 254 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
224 J/kg
Mixed-layer CIN
-227 J/kg
Mixed-layer LCL
625 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
254 m²/s²
0-3 km storm-relative helicity
352 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.6

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 6, 8:55 PM CDTMesoscale DiscussionSPCChautauqua, Cherokee, Crawford, Labette, Montgomery, Neosho and 1 more65 min
May 6, 9:07 PM CDTTornado WatchSPCAllen, Anderson, Atchison, Bourbon, Chautauqua, Cherokee and 16 more6 hr
May 6, 9:26 PM CDTMesoscale DiscussionSPCHarper, Kingman64 min
May 6, 11:34 PM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Chautauqua, Cherokee and 16 more56 min
May 7, 1:59 AM CDTMesoscale DiscussionSPCAllen, Anderson, Atchison, Bourbon, Chautauqua, Cherokee and 15 more91 min
May 7, 2:22 PM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Dunklin, Madison and 7 more113 min

Nearby

Mesoscale Discussions in Missouri, 2007Mesoscale Discussions in Kansas, 2007Mesoscale Discussions in Iowa, 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.