Alert archive / Missouri / Mesoscale Discussions in 2004

Mesoscale Discussion 755

May 18, 20044 counties in Kansas; 30 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at May 18, 2004, 9:17 PM CDT for 4 counties in Kansas; 30 counties in Missouri. It was in force for 118 min.

The area

The outline as issued.

The facts

Issued: May 18, 2004, 9:17 PM CDT (02:17 UTC)
Expired: May 18, 2004, 11:15 PM CDT
In force: 118 min
Issued by: the Storm Prediction Center

All 34 counties

Douglas County, KS, Johnson County, KS, Leavenworth County, KS, Wyandotte County, KS, Audrain County, MO, Boone County, MO, Buchanan County, MO, Caldwell County, MO, Callaway County, MO, Carroll County, MO, Cass County, MO, Chariton County, MO, Clay County, MO, Clinton County, MO, Cole County, MO, Cooper County, MO, Daviess County, MO, DeKalb County, MO, Grundy County, MO, Howard County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Moniteau County, MO, Monroe County, MO, Morgan County, MO, Pettis County, MO, Platte County, MO, Randolph County, MO, Ray County, MO, Saline County, MO

The radar

The Pleasant Hill radar (KEAX), 71 km from the middle of the area, began a volume at 02:16 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

Springfield, MO (KSGF), launched 00:00Z, 2.3 hours before the alert went out and 248 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: 1439 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 1070 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 99 m²/s²
0-3 km storm-relative helicity: 317 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 6.1

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.

Issued	Product	Office	Counties	Lasted
May 19, 2:01 AM CDT	Mesoscale Discussion	SPC	Johnson, Leavenworth, Miami, Wyandotte	3 hr
May 19, 11:38 AM CDT	Mesoscale Discussion	SPC	Barry, Benton, Camden, Cedar, Christian, Dade and 17 more	2 hr

Nearby

Mesoscale Discussions in Missouri, 2004 Mesoscale Discussions in Kansas, 2004 Every mesoscale discussion in 2004

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.