Alert archive / Kansas / Mesoscale Discussions in 2004

Mesoscale Discussion 470

April 24, 200417 counties in Kansas; 10 counties in Missouri; 5 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Apr 24, 2004, 4:22 PM CDT for 17 counties in Kansas; 10 counties in Missouri; 5 counties in Nebraska. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: Apr 24, 2004, 4:22 PM CDT (21:22 UTC)
Expired: Apr 24, 2004, 6:15 PM CDT
In force: 113 min
Issued by: the Storm Prediction Center

All 32 counties

Atchison County, KS, Brown County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Marshall County, KS, Miami County, KS, Nemaha County, KS, Osage County, KS, Pottawatomie County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Cass County, MO, Clay County, MO, Clinton County, MO, DeKalb County, MO, Holt County, MO, Jackson County, MO, Platte County, MO, Gage County, NE, Johnson County, NE, Nemaha County, NE, Pawnee County, NE, Richardson County, NE

The radar

The Topeka radar (KTWX), 71 km from the middle of the area, began a volume at 21:24 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 12:00Z, 9.4 hours before the alert went out and 312 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 562 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 187 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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, 7:05 PM CDT	Mesoscale Discussion	SPC	Chautauqua, Cherokee, Cowley, Crawford, Elk, Harper and 5 more	25 min
Apr 23, 7:35 PM CDT	Severe Thunderstorm Watch	SPC	Chautauqua, Cherokee, Cowley, Labette, Montgomery, Sumner	6 hr
Apr 23, 9:43 PM CDT	Mesoscale Discussion	SPC	Chautauqua, Cherokee, Cowley, Labette, Montgomery, Sumner	62 min
Apr 23, 11:33 PM CDT	Mesoscale Discussion	SPC	Cherokee	57 min
Apr 24, 11:50 AM CDT	Mesoscale Discussion	SPC	Butler, Dunklin, Mississippi, New Madrid, Oregon, Pemiscot and 2 more	55 min
Apr 24, 12:10 PM CDT	Tornado Watch	SPC	Butler, Carter, Dunklin, New Madrid, Oregon, Pemiscot and 3 more	8 hr
Apr 24, 3:23 PM CDT	Mesoscale Discussion	SPC	Dunklin, Oregon, Pemiscot	67 min
Apr 24, 5:08 PM CDT	Mesoscale Discussion	SPC	Bollinger, Butler, Cape Girardeau, Carter, Dunklin, Iron and 9 more	2 hr
Apr 24, 6:40 PM CDT	Tornado Watch	SPC	Bollinger, Butler, Cape Girardeau, Dunklin, Madison, Mississippi and 5 more	5 hr

Nearby

Mesoscale Discussions in Kansas, 2004 Mesoscale Discussions in Missouri, 2004 Mesoscale Discussions in Nebraska, 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.