Alert archive / Nebraska / Mesoscale Discussions in 2003

Mesoscale Discussion 1471

June 23, 200324 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 23, 2003, 1:42 PM CDT for 24 counties in Nebraska. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Jun 23, 2003, 1:42 PM CDT (18:42 UTC)
Expired: Jun 23, 2003, 4:15 PM CDT
In force: 3 hr
Issued by: the Storm Prediction Center

All 24 counties

Antelope County, NE, Arthur County, NE, Blaine County, NE, Boone County, NE, Brown County, NE, Custer County, NE, Garfield County, NE, Greeley County, NE, Holt County, NE, Hooker County, NE, Howard County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Nance County, NE, Perkins County, NE, Pierce County, NE, Rock County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 45 km from the middle of the area, began a volume at 18:44 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.

Tornado Watch 568Jun 23, 5:35 PM CDT

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 6.7 hours before the alert went out and 66 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: 1863 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 608 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 129 m²/s²
0-3 km storm-relative helicity: 337 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 19.9

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
Jun 22, 8:30 PM CDT	Tornado Watch	SPC	Adams, Antelope, Boone, Butler, Cedar, Clay and 31 more	5 hr
Jun 22, 10:32 PM CDT	Mesoscale Discussion	SPC	Adams, Boone, Butler, Clay, Colfax, Fillmore and 19 more	88 min
Jun 22, 11:20 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Buffalo, Butler, Cass, Clay, Douglas and 24 more	6 hr
Jun 23, 1:04 AM CDT	Mesoscale Discussion	SPC	Blaine, Boyd, Brown, Cedar, Cherry, Holt and 5 more	116 min
Jun 23, 1:49 AM CDT	Mesoscale Discussion	SPC	Adams, Buffalo, Clay, Fillmore, Franklin, Gage and 17 more	116 min
Jun 23, 3:13 AM CDT	Mesoscale Discussion	SPC	Antelope, Boone, Burt, Cedar, Colfax, Cuming and 17 more	2 hr
Jun 23, 5:35 PM CDT	Tornado Watch	SPC	Antelope, Arthur, Blaine, Boone, Boyd, Brown and 37 more	5 hr
Jun 23, 6:00 PM CDT	Severe Thunderstorm Watch	SPC	Dundy, Hitchcock, Red Willow	6 hr
Jun 23, 6:45 PM CDT	Tornado Watch	SPC	Boyd	4 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.