Alert archive / Nebraska / Mesoscale Discussions in 2003

Mesoscale Discussion 717

May 3, 2003Logan County, Phillips County, Sedgwick County, Colorado; 16 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 3, 2003, 7:33 PM MDT for Logan County, Phillips County, Sedgwick County, Colorado; 16 counties in Nebraska. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: May 3, 2003, 7:33 PM MDT (01:33 UTC)
Expired: May 3, 2003, 8:30 PM MDT
In force: 57 min
Issued by: the Storm Prediction Center

Counties Logan County, CO, Phillips County, CO, Sedgwick County, CO, Arthur County, NE, Box Butte County, NE, Chase County, NE, Cherry County, NE, Cheyenne County, NE, Deuel County, NE, Garden County, NE, Grant County, NE, Hayes County, NE, Hooker County, NE, Keith County, NE, Lincoln County, NE, McPherson County, NE, Morrill County, NE, Perkins County, NE, Sheridan County, NE

The radar

The North Platte radar (KLNX), 151 km from the middle of the area, began a volume at 01:32 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 228May 3, 9:20 PM MDT

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.6 hours before the alert went out and 170 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: 125 J/kg
Mixed-layer CIN: -302 J/kg
Mixed-layer LCL: 872 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 254 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, 8:42 PM MDT	Mesoscale Discussion	SPC	Adams, Arthur, Blaine, Brown, Buffalo, Chase and 33 more	33 min
May 3, 9:20 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Antelope, Arthur, Blaine, Boone, Boyd and 41 more	6 hr
May 3, 10:46 PM MDT	Mesoscale Discussion	SPC	Adams, Antelope, Arthur, Blaine, Boone, Brown and 68 more	59 min
May 3, 11:10 PM MDT	Severe Thunderstorm Watch	SPC	Burt, Butler, Cass, Colfax, Cuming, Dodge and 23 more	6 hr
May 4, 1:58 AM MDT	Mesoscale Discussion	SPC	Adams, Antelope, Boone, Buffalo, Burt, Butler and 46 more	92 min
May 4, 8:48 AM MDT	Mesoscale Discussion	SPC	Burt, Cass, Cedar, Cuming, Dakota, Dixon and 13 more	117 min
May 4, 10:40 AM MDT	Tornado Watch	SPC	Adams, Buffalo, Clay, Fillmore, Gage, Hall and 11 more	6 hr
May 4, 11:14 AM MDT	Mesoscale Discussion	SPC	Cass, Douglas, Gage, Johnson, Lancaster, Nemaha and 7 more	2 hr
May 4, 11:45 AM MDT	Tornado Watch	SPC	Cass, Douglas, Nemaha, Otoe, Richardson, Sarpy	6 hr
May 4, 12:55 PM MDT	Mesoscale Discussion	SPC	Clay, Fillmore, Gage, Hamilton, Lancaster, Saline and 2 more	2 hr
May 4, 1:22 PM MDT	Mesoscale Discussion	SPC	Cass, Douglas, Lancaster, Nemaha, Otoe, Richardson and 2 more	113 min

Nearby

Mesoscale Discussions in Nebraska, 2003 Mesoscale Discussions in Colorado, 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.