Alert archive / Nebraska / Mesoscale Discussions in 2003

Mesoscale Discussion 731

May 4, 20038 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 4, 2003, 1:55 PM CDT for 8 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 4, 2003, 1:55 PM CDT (18:55 UTC)
Expired: May 4, 2003, 4:00 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Clay County, NE, Fillmore County, NE, Gage County, NE, Hamilton County, NE, Lancaster County, NE, Saline County, NE, Seward County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 90 km from the middle of the area, began a volume at 18:57 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

Omaha, NE (KOAX), launched 12:00Z, 6.9 hours before the alert went out and 123 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 558 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 375 m²/s²
0-3 km storm-relative helicity: 509 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 3, 8:33 PM CDT	Mesoscale Discussion	SPC	Arthur, Box Butte, Chase, Cherry, Cheyenne, Deuel and 10 more	57 min
May 3, 9:42 PM CDT	Mesoscale Discussion	SPC	Adams, Arthur, Blaine, Brown, Buffalo, Chase and 33 more	33 min
May 3, 10:20 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Antelope, Arthur, Blaine, Boone, Boyd and 41 more	6 hr
May 3, 11:46 PM CDT	Mesoscale Discussion	SPC	Adams, Antelope, Arthur, Blaine, Boone, Brown and 68 more	59 min
May 4, 12:10 AM CDT	Severe Thunderstorm Watch	SPC	Burt, Butler, Cass, Colfax, Cuming, Dodge and 23 more	6 hr
May 4, 2:58 AM CDT	Mesoscale Discussion	SPC	Adams, Antelope, Boone, Buffalo, Burt, Butler and 46 more	92 min
May 4, 9:48 AM CDT	Mesoscale Discussion	SPC	Burt, Cass, Cedar, Cuming, Dakota, Dixon and 13 more	117 min
May 4, 11:40 AM CDT	Tornado Watch	SPC	Adams, Buffalo, Clay, Fillmore, Gage, Hall and 11 more	6 hr
May 4, 12:14 PM CDT	Mesoscale Discussion	SPC	Cass, Douglas, Gage, Johnson, Lancaster, Nemaha and 7 more	2 hr
May 4, 12:45 PM CDT	Tornado Watch	SPC	Cass, Douglas, Nemaha, Otoe, Richardson, Sarpy	6 hr
May 4, 2:22 PM CDT	Mesoscale Discussion	SPC	Cass, Douglas, Lancaster, Nemaha, Otoe, Richardson and 2 more	113 min

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.