Alert archive / Nebraska / Mesoscale Discussions in 2004

Mesoscale Discussion 2203

September 13, 20045 states

The Storm Prediction Center issued this mesoscale discussion at Sep 13, 2004, 8:59 PM CDT for 5 states. It was in force for 61 min.

The area

The outline as issued.

The facts

Issued: Sep 13, 2004, 8:59 PM CDT (01:59 UTC)
Expired: Sep 13, 2004, 10:00 PM CDT
In force: 61 min
Issued by: the Storm Prediction Center

All 45 counties

Lyon County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Sioux County, IA, Decatur County, KS, Benton County, MN, Brown County, MN, Cottonwood County, MN, Jackson County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Redwood County, MN, Renville County, MN, Rock County, MN, Sibley County, MN, Wright County, MN, Adams County, NE, Boone County, NE, Buffalo County, NE, Cedar County, NE, Dakota County, NE, Dixon County, NE, Franklin County, NE, Furnas County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Howard County, NE, Kearney County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Phelps County, NE, Pierce County, NE, Platte County, NE, Stanton County, NE, Wayne County, NE, Clay County, SD, Lincoln County, SD, Union County, SD

The radar

The Omaha radar (KOAX), 138 km from the middle of the area, began a volume at 02:02 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.0 hours before the alert went out and 271 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: 87 J/kg
Mixed-layer CIN: -234 J/kg
Mixed-layer LCL: 2673 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 152 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
Sep 14, 1:47 PM CDT	Mesoscale Discussion	SPC	Adair, Audubon, Boone, Calhoun, Carroll, Cass and 23 more	88 min
Sep 14, 2:45 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Audubon, Boone, Buena Vista, Calhoun, Carroll and 33 more	7 hr
Sep 14, 5:14 PM CDT	Mesoscale Discussion	SPC	Adair, Audubon, Boone, Buena Vista, Calhoun, Carroll and 32 more	2 hr
Sep 14, 2:49 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Logan, Rawlins, Sheridan, Sherman and 2 more	116 min
Sep 14, 3:20 PM CDT	Severe Thunderstorm Watch	SPC	Cheyenne	7 hr
Sep 14, 6:44 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Norton, Phillips, Rawlins, Smith	91 min

Nearby

Mesoscale Discussions in Nebraska, 2004 Mesoscale Discussions in Minnesota, 2004 Mesoscale Discussions in Iowa, 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.