Alert archive / Nebraska / Mesoscale Discussions in 2003

Mesoscale Discussion 1272

June 9, 200310 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 9, 2003, 3:42 PM CDT for 10 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 9, 2003, 3:42 PM CDT (20:42 UTC)
Expired: Jun 9, 2003, 5:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Blaine County, NE, Buffalo County, NE, Custer County, NE, Dawson County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE

The radar

The North Platte radar (KLNX), 76 km from the middle of the area, began a volume at 20:45 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 493Jun 9, 4:50 PM CDT

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 8.7 hours before the alert went out and 29 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: 343 J/kg
Mixed-layer CIN: -293 J/kg
Mixed-layer LCL: 1527 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 191 m²/s²
0-3 km storm-relative helicity: 233 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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 9, 2:05 PM CDT	Mesoscale Discussion	SPC	Blaine, Brown, Clay, Fillmore, Hall, Hamilton and 6 more	115 min
Jun 9, 2:55 PM CDT	Tornado Watch	SPC	Boyd, Brown, Cherry, Holt, Keya Paha, Rock	6 hr
Jun 9, 4:30 PM CDT	Mesoscale Discussion	SPC	Franklin, Furnas, Harlan, Hayes, Hitchcock, Red Willow and 1 more	60 min
Jun 9, 4:50 PM CDT	Tornado Watch	SPC	Adams, Blaine, Boone, Buffalo, Clay, Custer and 25 more	5 hr
Jun 9, 5:00 PM CDT	Mesoscale Discussion	SPC	Boyd, Brown, Cherry, Holt, Keya Paha, Rock	90 min
Jun 9, 6:15 PM CDT	Severe Thunderstorm Watch	SPC	Antelope, Boone, Burt, Cedar, Colfax, Cuming and 11 more	7 hr
Jun 9, 6:30 PM CDT	Mesoscale Discussion	SPC	Blaine, Boyd, Brown, Buffalo, Custer, Dawson and 15 more	90 min
Jun 9, 6:50 PM CDT	Tornado Watch	SPC	Antelope, Boone, Burt, Cedar, Colfax, Cuming and 11 more	6 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.