Alert archive / Nebraska / Mesoscale Discussions in 2004

Mesoscale Discussion 1919

August 8, 200431 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Aug 8, 2004, 3:00 AM CDT for 31 counties in Nebraska. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Aug 8, 2004, 3:00 AM CDT (08:00 UTC)
Expired: Aug 8, 2004, 4:30 AM CDT
In force: 90 min
Issued by: the Storm Prediction Center

All 31 counties

Antelope County, NE, Blaine County, NE, Boone County, NE, Brown County, NE, Buffalo County, NE, Butler County, NE, Cherry County, NE, Colfax County, NE, Custer County, NE, Dawson County, NE, Garfield County, NE, Greeley County, NE, Hall County, NE, Holt County, NE, Hooker County, NE, Howard County, NE, Logan County, NE, Loup County, NE, Madison County, NE, McPherson County, NE, Merrick County, NE, Nance County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Rock County, NE, Sherman County, NE, Stanton County, NE, Thomas County, NE, Valley County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 126 km from the middle of the area, began a volume at 08:01 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, 8.0 hours before the alert went out and 159 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: 2210 J/kg
Mixed-layer CIN: -149 J/kg
Mixed-layer LCL: 1526 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

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 8, 1:05 PM CDT	Mesoscale Discussion	SPC	Adams, Buffalo, Butler, Cass, Clay, Dodge and 30 more	55 min
Aug 8, 1:45 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Clay, Fillmore, Franklin, Furnas, Gage and 11 more	7 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.