Alert archive / Nebraska / Mesoscale Discussions in 2004

Mesoscale Discussion 624

May 9, 200443 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 9, 2004, 6:12 PM CDT for 43 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 9, 2004, 6:12 PM CDT (23:12 UTC)
Expired: May 9, 2004, 8:15 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 43 counties

Adams County, NE, Antelope County, NE, Blaine County, NE, Boone County, NE, Buffalo County, NE, Butler County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Custer County, NE, Dawson County, NE, Dodge County, NE, Fillmore County, NE, Frontier County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Hayes County, NE, Howard County, NE, Kearney County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, Madison County, NE, McPherson County, NE, Merrick County, NE, Nance County, NE, Perkins County, NE, Phelps County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Saunders County, NE, Seward County, NE, Sherman County, NE, Stanton County, NE, Valley County, NE, Wayne County, NE, Wheeler County, NE, York County, NE

The radar

The North Platte radar (KLNX), 103 km from the middle of the area, began a volume at 23:14 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 177May 9, 7:55 PM CDT

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.2 hours before the alert went out and 78 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: 639 J/kg
Mixed-layer CIN: -440 J/kg
Mixed-layer LCL: 1809 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 191 m²/s²
0-3 km storm-relative helicity: 240 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
May 8, 7:54 PM CDT	Mesoscale Discussion	SPC	Butler, Cass, Clay, Dodge, Douglas, Fillmore and 20 more	2 hr
May 8, 8:25 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Buffalo, Burt, Butler, Cass, Clay and 29 more	6 hr
May 8, 9:17 PM CDT	Mesoscale Discussion	SPC	Boyd	88 min
May 8, 10:44 PM CDT	Mesoscale Discussion	SPC	Cass, Douglas, Fillmore, Gage, Jefferson, Johnson and 12 more	2 hr
May 9, 1:22 AM CDT	Mesoscale Discussion	SPC	Adams, Cass, Clay, Fillmore, Franklin, Gage and 14 more	23 min
May 9, 2:42 PM CDT	Mesoscale Discussion	SPC	Arthur, Blaine, Brown, Chase, Cherry, Custer and 19 more	3 hr
May 9, 3:30 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Antelope, Blaine, Boone, Boyd, Buffalo and 29 more	6 hr
May 9, 5:38 PM CDT	Mesoscale Discussion	SPC	Cedar	2 hr

Nearby

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.