Alert archive / Missouri / Mesoscale Discussions in 2007

Mesoscale Discussion 1943

September 6, 2007Johnson County, Leavenworth County, Wyandotte County, Kansas; 19 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Sep 6, 2007, 10:51 PM CDT for Johnson County, Leavenworth County, Wyandotte County, Kansas; 19 counties in Missouri. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Sep 6, 2007, 10:51 PM CDT (03:51 UTC)
Expired: Sep 7, 2007, 12:15 AM CDT
In force: 84 min
Issued by: the Storm Prediction Center

All 22 counties

Johnson County, KS, Leavenworth County, KS, Wyandotte County, KS, Caldwell County, MO, Carroll 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, Jackson County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Mercer County, MO, Platte County, MO, Ray County, MO, Sullivan County, MO, Worth County, MO

The radar

The Pleasant Hill radar (KEAX), 86 km from the middle of the area, began a volume at 03:53 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 nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 3.9 hours before the alert went out and 135 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1675 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 1502 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 272 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 6.7

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.

Issued	Product	Office	Counties	Lasted
Sep 6, 8:01 PM CDT	Mesoscale Discussion	SPC	Barton, Clark, Comanche, Edwards, Ellsworth, Ford and 8 more	89 min
Sep 6, 9:30 PM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Clay, Cloud, Decatur, Doniphan and 29 more	90 min

Nearby

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