Alert archive / Kansas / Mesoscale Discussions in 2004

Mesoscale Discussion 2028

August 17, 200420 counties in Kansas; 7 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Aug 17, 2004, 5:04 PM CDT for 20 counties in Kansas; 7 counties in Missouri. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Aug 17, 2004, 5:04 PM CDT (22:04 UTC)
Expired: Aug 17, 2004, 7:00 PM CDT
In force: 116 min
Issued by: the Storm Prediction Center

All 27 counties

Anderson County, KS, Chase County, KS, Coffey County, KS, Dickinson County, KS, Douglas County, KS, Ellsworth County, KS, Franklin County, KS, Harvey County, KS, Johnson County, KS, Linn County, KS, Lyon County, KS, Marion County, KS, McPherson County, KS, Miami County, KS, Morris County, KS, Osage County, KS, Rice County, KS, Saline County, KS, Wabaunsee County, KS, Wyandotte County, KS, Bates County, MO, Cass County, MO, Henry County, MO, Jackson County, MO, Johnson County, MO, Lafayette County, MO, Pettis County, MO

The radar

The Topeka radar (KTWX), 52 km from the middle of the area, began a volume at 22:07 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 12:00Z, 10.1 hours before the alert went out and 40 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: 926 J/kg
Mixed-layer CIN: -180 J/kg
Mixed-layer LCL: 1172 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 41 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

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
Aug 17, 12:57 PM CDT	Mesoscale Discussion	SPC	Adair, Audrain, Clark, Knox, Lewis, Lincoln and 10 more	63 min
Aug 17, 1:20 PM CDT	Severe Thunderstorm Watch	SPC	Audrain, Callaway, Clark, Knox, Lewis, Lincoln and 7 more	6 hr
Aug 17, 3:59 PM CDT	Mesoscale Discussion	SPC	Audrain, Callaway, Clark, Cole, Knox, Lewis and 8 more	61 min
Aug 17, 5:57 PM CDT	Mesoscale Discussion	SPC	Pike, Ralls	93 min

Nearby

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