Alert archive / Nebraska / Mesoscale Discussions in 2004

Mesoscale Discussion 1148

June 8, 2004Phillips County, Sedgwick County, Yuma County, Colorado; 28 counties in Nebraska; Gregory County, Tripp County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2004, 7:20 PM MDT for Phillips County, Sedgwick County, Yuma County, Colorado; 28 counties in Nebraska; Gregory County, Tripp County, South Dakota. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Jun 8, 2004, 7:20 PM MDT (01:20 UTC)
Expired: Jun 8, 2004, 9:15 PM MDT
In force: 115 min
Issued by: the Storm Prediction Center

All 33 counties

Phillips County, CO, Sedgwick County, CO, Yuma County, CO, Arthur County, NE, Blaine County, NE, Brown County, NE, Chase County, NE, Cherry County, NE, Cheyenne County, NE, Custer County, NE, Dawson County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Garden County, NE, Garfield County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Holt County, NE, Hooker County, NE, Keith County, NE, Keya Paha County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Perkins County, NE, Rock County, NE, Thomas County, NE, Valley County, NE, Gregory County, SD, Tripp County, SD

The radar

The North Platte radar (KLNX), 45 km from the middle of the area, began a volume at 01:22 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 412Jun 8, 7:55 PM MDT

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 1.3 hours before the alert went out and 57 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: 711 J/kg
Mixed-layer CIN: -427 J/kg
Mixed-layer LCL: 1960 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 329 m²/s²
0-3 km storm-relative helicity: 439 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.8

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, 7:55 PM MDT	Severe Thunderstorm Watch	SPC	Kit Carson, Yuma	5 hr
Jun 8, 10:58 PM MDT	Mesoscale Discussion	SPC	Phillips, Sedgwick, Yuma	2 hr
Jun 9, 12:42 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Baca, Bent, Cheyenne, Crowley and 14 more	93 min
Jun 9, 1:40 PM MDT	Tornado Watch	SPC	Adams, Arapahoe, Baca, Bent, Boulder, Broomfield and 21 more	6 hr
Jun 9, 4:42 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Baca, Bent, Boulder, Broomfield and 20 more	93 min
Jun 9, 12:03 AM MDT	Mesoscale Discussion	SPC	Chase, Dawson, Dundy, Frontier, Gosper, Hayes and 3 more	27 min

Nearby

Mesoscale Discussions in Nebraska, 2004 Mesoscale Discussions in Colorado, 2004 Mesoscale Discussions in South Dakota, 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.