Alert archive / Missouri / Mesoscale Discussions in 2004

Mesoscale Discussion 448

April 23, 200411 counties in Kansas; 18 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Apr 23, 2004, 12:51 PM CDT for 11 counties in Kansas; 18 counties in Missouri. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: Apr 23, 2004, 12:51 PM CDT (17:51 UTC)
Expired: Apr 23, 2004, 2:45 PM CDT
In force: 114 min
Issued by: the Storm Prediction Center

All 29 counties

Allen County, KS, Anderson County, KS, Bourbon County, KS, Cherokee County, KS, Crawford County, KS, Labette County, KS, Linn County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Woodson County, KS, Barton County, MO, Bates County, MO, Benton County, MO, Camden County, MO, Cedar County, MO, Dade County, MO, Dallas County, MO, Greene County, MO, Henry County, MO, Hickory County, MO, Jasper County, MO, Laclede County, MO, Lawrence County, MO, Morgan County, MO, Polk County, MO, St. Clair County, MO, Vernon County, MO, Webster County, MO

The radar

The Pleasant Hill radar (KEAX), 122 km from the middle of the area, began a volume at 17:54 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.

Severe Thunderstorm Watch 112Apr 23, 3:05 PM CDT

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 5.9 hours before the alert went out and 120 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: 47 J/kg
Mixed-layer CIN: -148 J/kg
Mixed-layer LCL: 565 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

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
Apr 23, 10:10 AM CDT	Mesoscale Discussion	SPC	Clark, Comanche, Ford, Gray, Meade, Seward	3 hr
Apr 23, 10:37 AM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 13 more	113 min
Apr 23, 3:05 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Bourbon, Butler, Chautauqua, Cherokee, Cowley and 12 more	5 hr
Apr 23, 6:01 PM CDT	Mesoscale Discussion	SPC	Allen, Bourbon, Butler, Chautauqua, Crawford, Elk and 8 more	59 min
Apr 22, 7:10 PM CDT	Mesoscale Discussion	SPC	Christian, Newton, Stone, Taney	35 min
Apr 22, 7:50 PM CDT	Tornado Watch	SPC	Barry, Howell, McDonald, Oregon, Ozark, Stone and 1 more	4 hr
Apr 22, 9:50 PM CDT	Severe Thunderstorm Watch	SPC	Howell, Oregon, Ozark, Taney	6 hr
Apr 22, 11:25 PM CDT	Mesoscale Discussion	SPC	Butler, Dunklin, Mississippi, New Madrid, Pemiscot, Ripley and 2 more	65 min
Apr 22, 11:40 PM CDT	Severe Thunderstorm Watch	SPC	Butler, Dunklin, New Madrid, Pemiscot, Ripley	6 hr
Apr 23, 12:54 AM CDT	Mesoscale Discussion	SPC	Howell, Oregon, Ozark, Taney	96 min
Apr 23, 3:12 AM CDT	Mesoscale Discussion	SPC	Dunklin, New Madrid, Pemiscot, Ripley	93 min

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.