Alert archive / Nebraska / Mesoscale Discussions in 2004

Mesoscale Discussion 711

May 16, 200424 counties in Nebraska; Clay County, Union County, Yankton County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 16, 2004, 7:27 PM CDT for 24 counties in Nebraska; Clay County, Union County, Yankton County, South Dakota. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: May 16, 2004, 7:27 PM CDT (00:27 UTC)
Expired: May 16, 2004, 10:30 PM CDT
In force: 3 hr
Issued by: the Storm Prediction Center

All 27 counties

Antelope County, NE, Boone County, NE, Butler County, NE, Cedar County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Greeley County, NE, Howard County, NE, Knox County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Sherman County, NE, Stanton County, NE, Thurston County, NE, Valley County, NE, Wayne County, NE, Wheeler County, NE, Clay County, SD, Union County, SD, Yankton County, SD

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 0.5 hours before the alert went out and 155 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: 277 J/kg
Mixed-layer CIN: -87 J/kg
Mixed-layer LCL: 1550 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 296 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.5

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
May 16, 8:07 PM CDT	Mesoscale Discussion	SPC	Adams, Clay, Fillmore, Franklin, Gage, Jefferson and 6 more	83 min
May 16, 9:26 PM CDT	Mesoscale Discussion	SPC	Adams, Antelope, Boone, Boyd, Buffalo, Burt and 42 more	3 hr
May 17, 1:42 PM CDT	Mesoscale Discussion	SPC	Boone, Buffalo, Burt, Butler, Colfax, Cuming and 19 more	2 hr
May 17, 3:08 PM CDT	Mesoscale Discussion	SPC	Cass, Douglas, Fillmore, Gage, Jefferson, Johnson and 8 more	3 hr
May 17, 4:45 PM CDT	Severe Thunderstorm Watch	SPC	Cass, Douglas, Gage, Johnson, Lancaster, Nemaha and 4 more	5 hr

Nearby

Mesoscale Discussions in Nebraska, 2004 Mesoscale Discussions in South Dakota, 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.