Alert archive / Nebraska / Mesoscale Discussions in 2003

Mesoscale Discussion 2028

July 31, 200326 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 31, 2003, 4:26 AM CDT for 26 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 31, 2003, 4:26 AM CDT (09:26 UTC)
Expired: Jul 31, 2003, 6:30 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 26 counties

Antelope County, NE, Boone County, NE, Butler County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Fillmore County, NE, Greeley County, NE, Hamilton County, NE, Howard County, NE, Lancaster County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Saline 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 Omaha radar (KOAX), 126 km from the middle of the area, began a volume at 09:28 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, 9.4 hours before the alert went out and 231 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: 710 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 2534 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 75 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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
Jul 31, 2:35 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Chase, Cheyenne, Deuel, Dundy, Franklin and 13 more	5 hr

Nearby

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.