Alert archive / Nebraska / Mesoscale Discussions in 2004

Mesoscale Discussion 1140

June 8, 200427 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2004, 1:24 PM MDT for 27 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 8, 2004, 1:24 PM MDT (19:24 UTC)
Expired: Jun 8, 2004, 3:30 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 27 counties

Arthur County, NE, Blaine County, NE, Boone County, NE, Buffalo County, NE, Chase County, NE, Custer County, NE, Dawson County, NE, Frontier County, NE, Garfield County, NE, Greeley County, NE, Hayes 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, Merrick County, NE, Nance County, NE, Perkins County, NE, Rock County, NE, Sherman County, NE, Thomas County, NE, Valley County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 94 km from the middle of the area, began a volume at 19:26 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.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 7.4 hours before the alert went out and 54 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: 1875 J/kg
Mixed-layer CIN: -393 J/kg
Mixed-layer LCL: 915 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 276 m²/s²
0-3 km storm-relative helicity: 264 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
Jun 8, 2:00 PM MDT	Tornado Watch	SPC	Adams, Arthur, Buffalo, Chase, Custer, Dawson and 22 more	6 hr
Jun 8, 2:29 PM MDT	Mesoscale Discussion	SPC	Burt, Colfax, Cuming, Dakota, Dixon, Dodge and 5 more	2 hr
Jun 8, 4:00 PM MDT	Severe Thunderstorm Watch	SPC	Antelope, Boone, Burt, Cedar, Colfax, Cuming and 13 more	6 hr
Jun 8, 4:24 PM MDT	Mesoscale Discussion	SPC	Buffalo, Chase, Custer, Dawson, Frontier, Furnas and 10 more	2 hr
Jun 8, 5:02 PM MDT	Mesoscale Discussion	SPC	Chase, Dundy, Perkins	118 min

Nearby

Mesoscale Discussions in Nebraska, 2004 Every mesoscale discussion in 2004

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.