Alert archive / Nebraska / Mesoscale Discussions in 2004

Mesoscale Discussion 1577

July 8, 20045 counties in Kansas; 24 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 8, 2004, 10:58 PM CDT for 5 counties in Kansas; 24 counties in Nebraska. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Jul 8, 2004, 10:58 PM CDT (03:58 UTC)
Expired: Jul 9, 2004, 12:30 AM CDT
In force: 92 min
Issued by: the Storm Prediction Center

All 29 counties

Decatur County, KS, Norton County, KS, Phillips County, KS, Rawlins County, KS, Smith County, KS, Adams County, NE, Buffalo County, NE, Butler County, NE, Clay County, NE, Dawson County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gosper County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Hitchcock County, NE, Howard County, NE, Kearney County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Phelps County, NE, Polk County, NE, Red Willow County, NE, Sherman County, NE, Webster County, NE, York County, NE

The radar

The Grand Island radar (KUEX), 96 km from the middle of the area, began a volume at 04:02 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 595Jul 9, 12:45 AM CDT

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 4.0 hours before the alert went out and 107 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: 1868 J/kg
Mixed-layer CIN: -201 J/kg
Mixed-layer LCL: 1853 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 188 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -2.1

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 8, 9:05 PM CDT	Mesoscale Discussion	SPC	Clark, Comanche, Meade, Seward	115 min
Jul 8, 9:45 PM CDT	Severe Thunderstorm Watch	SPC	Decatur, Norton, Phillips, Smith	6 hr
Jul 9, 12:19 AM CDT	Mesoscale Discussion	SPC	Clay, Cloud, Dickinson, Ellis, Ellsworth, Geary and 14 more	56 min
Jul 9, 12:45 AM CDT	Severe Thunderstorm Watch	SPC	Barton, Brown, Chase, Clay, Cloud, Dickinson and 27 more	4 hr
Jul 9, 2:46 AM CDT	Mesoscale Discussion	SPC	Barton, Chase, Clay, Cloud, Dickinson, Ellis and 27 more	89 min
Jul 8, 8:05 PM CDT	Severe Thunderstorm Watch	SPC	Blaine, Brown, Chase, Custer, Dawson, Frontier and 13 more	6 hr
Jul 9, 1:03 AM CDT	Mesoscale Discussion	SPC	Chase, Dundy, Frontier, Hayes, Hitchcock, Red Willow	57 min
Jul 9, 2:02 PM CDT	Mesoscale Discussion	SPC	Banner, Kimball, Scotts Bluff	118 min
Jul 9, 6:59 PM CDT	Mesoscale Discussion	SPC	Arthur, Banner, Box Butte, Cheyenne, Dawes, Deuel and 7 more	106 min

Nearby

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