Alert archive / Kansas / Mesoscale Discussions in 2003

Mesoscale Discussion 1928

July 20, 200312 counties in Kansas; Holt County, Nodaway County, Missouri; Nuckolls County, Richardson County, Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 20, 2003, 10:43 PM CDT for 12 counties in Kansas; Holt County, Nodaway County, Missouri; Nuckolls County, Richardson County, Nebraska. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued: Jul 20, 2003, 10:43 PM CDT (03:43 UTC)
Expired: Jul 20, 2003, 11:45 PM CDT
In force: 62 min
Issued by: the Storm Prediction Center

Counties Brown County, KS, Clay County, KS, Cloud County, KS, Jewell County, KS, Marshall County, KS, Mitchell County, KS, Nemaha County, KS, Ottawa County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Washington County, KS, Holt County, MO, Nodaway County, MO, Nuckolls County, NE, Richardson County, NE

The radar

The Grand Island radar (KUEX), 121 km from the middle of the area, began a volume at 03:43 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, 3.7 hours before the alert went out and 163 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: 3627 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 2071 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 9.9

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
Jul 20, 7:03 PM CDT	Mesoscale Discussion	SPC	Decatur, Norton, Phillips, Rawlins, Sheridan, Thomas	87 min
Jul 20, 8:50 PM CDT	Tornado Watch	SPC	Brown, Clay, Cloud, Jewell, Lincoln, Marshall and 5 more	5 hr
Jul 20, 10:16 PM CDT	Mesoscale Discussion	SPC	Chase, Coffey, Dickinson, Douglas, Franklin, Geary and 9 more	89 min
Jul 21, 2:24 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Graham, Norton, Phillips, Rawlins and 2 more	66 min
Jul 21, 4:50 PM CDT	Tornado Watch	SPC	Cheyenne, Decatur, Gove, Graham, Logan, Norton and 6 more	5 hr
Jul 20, 7:05 PM CDT	Severe Thunderstorm Watch	SPC	Douglas, Howell, Oregon, Ozark, Shannon	5 hr
Jul 20, 8:08 PM CDT	Mesoscale Discussion	SPC	Adair, Clark, Daviess, Gentry, Grundy, Harrison and 7 more	2 hr
Jul 20, 11:14 PM CDT	Mesoscale Discussion	SPC	Adair, Carroll, Chariton, Clark, Grundy, Knox and 14 more	2 hr
Jul 20, 11:30 PM CDT	Severe Thunderstorm Watch	SPC	Clark, Knox, Lewis, Marion, Monroe, Ralls and 2 more	6 hr
Jul 20, 7:49 PM CDT	Mesoscale Discussion	SPC	Adams, Burt, Butler, Cass, Clay, Colfax and 26 more	56 min

Nearby

Mesoscale Discussions in Kansas, 2003 Mesoscale Discussions in Missouri, 2003 Mesoscale Discussions in Nebraska, 2003 Every mesoscale discussion in 2003

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.