Alert archive / Nebraska / Mesoscale Discussions in 2004

Mesoscale Discussion 1486

July 3, 20044 states

The Storm Prediction Center issued this mesoscale discussion at Jul 3, 2004, 2:50 PM MDT for 4 states. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Jul 3, 2004, 2:50 PM MDT (20:50 UTC)
Expired: Jul 3, 2004, 4:45 PM MDT
In force: 115 min
Issued by: the Storm Prediction Center

All 46 counties

Kit Carson County, CO, Logan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Gove County, KS, Logan County, KS, Rawlins County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Arthur County, NE, Blaine County, NE, Box Butte County, NE, Brown County, NE, Chase County, NE, Cherry County, NE, Cheyenne County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Garden County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Keith County, NE, Keya Paha County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Morrill County, NE, Perkins County, NE, Red Willow County, NE, Sheridan County, NE, Thomas County, NE, Bennett County, SD, Jackson County, SD, Mellette County, SD, Oglala Lakota County, SD, Todd County, SD, Tripp County, SD

The radar

The North Platte radar (KLNX), 154 km from the middle of the area, began a volume at 20:51 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, 8.8 hours before the alert went out and 116 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: 75 J/kg
Mixed-layer CIN: -414 J/kg
Mixed-layer LCL: 1760 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 113 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
Jul 2, 6:51 PM MDT	Mesoscale Discussion	SPC	Baca, Bent, Prowers	84 min
Jul 2, 8:19 PM MDT	Mesoscale Discussion	SPC	Baca, Bent, Kiowa, Prowers	56 min
Jul 3, 3:30 PM MDT	Severe Thunderstorm Watch	SPC	Kit Carson, Phillips, Sedgwick, Yuma	7 hr
Jul 3, 5:27 PM MDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Graham, Jewell, Norton, Phillips and 3 more	63 min
Jul 3, 5:55 PM MDT	Severe Thunderstorm Watch	SPC	Cloud, Graham, Jewell, Mitchell, Norton, Osborne and 5 more	7 hr
Jul 3, 1:10 PM MDT	Mesoscale Discussion	SPC	Brown, Day, Grant, McPherson, Marshall, Roberts	3 hr

Nearby

Mesoscale Discussions in Nebraska, 2004 Mesoscale Discussions in Kansas, 2004 Mesoscale Discussions in Colorado, 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.