Alert archive / Nebraska / Mesoscale Discussions in 2004

Mesoscale Discussion 1508

July 4, 2004Norton County, Phillips County, Kansas; 26 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 4, 2004, 7:02 PM CDT for Norton County, Phillips County, Kansas; 26 counties in Nebraska. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: Jul 4, 2004, 7:02 PM CDT (00:02 UTC)
Expired: Jul 4, 2004, 8:00 PM CDT
In force: 58 min
Issued by: the Storm Prediction Center

All 28 counties

Norton County, KS, Phillips County, KS, Adams County, NE, Blaine County, NE, Brown County, NE, Buffalo County, NE, Custer County, NE, Dawson County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Harlan County, NE, Holt County, NE, Howard County, NE, Kearney County, NE, Keya Paha County, NE, Logan County, NE, Loup County, NE, Phelps County, NE, Red Willow County, NE, Rock County, NE, Sherman County, NE, Valley County, NE, Wheeler County, NE

The radar

The North Platte radar (KLNX), 69 km from the middle of the area, began a volume at 00:04 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 555Jul 4, 7:25 PM CDT

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.0 hours before the alert went out and 77 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: 2129 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 1890 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

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 4, 7:12 PM CDT	Mesoscale Discussion	SPC	Barber, Barton, Clark, Comanche, Edwards, Ellis and 15 more	2 hr
Jul 4, 7:25 PM CDT	Severe Thunderstorm Watch	SPC	Cloud, Graham, Jewell, Mitchell, Norton, Osborne and 5 more	7 hr
Jul 4, 9:21 PM CDT	Mesoscale Discussion	SPC	Butler, Chase, Cowley, Dickinson, Elk, Ellsworth and 11 more	54 min
Jul 4, 9:40 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Barber, Barton, Butler, Chase and 44 more	6 hr
Jul 4, 10:45 PM CDT	Mesoscale Discussion	SPC	Cloud, Jewell, Mitchell, Phillips, Republic, Smith	60 min
Jul 4, 11:05 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Clay, Jackson, Marshall, Nemaha, Pottawatomie and 3 more	5 hr
Jul 4, 11:20 PM CDT	Mesoscale Discussion	SPC	Barber, Barton, Butler, Chase, Clark, Comanche and 30 more	55 min
Jul 5, 1:16 AM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Doniphan, Jackson, Marshall, Nemaha	89 min
Jul 5, 2:00 AM CDT	Severe Thunderstorm Watch	SPC	Atchison, Brown, Doniphan, Douglas, Jackson, Jefferson and 5 more	5 hr
Jul 5, 2:06 AM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Barber, Butler, Chase, Chautauqua and 20 more	114 min
Jul 5, 3:25 AM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 10 more	6 hr
Jul 5, 4:45 AM CDT	Mesoscale Discussion	SPC	Johnson, Miami, Wyandotte	2 hr
Jul 5, 6:02 AM CDT	Mesoscale Discussion	SPC	Bourbon, Cherokee, Crawford, Labette, Montgomery, Neosho	88 min
Jul 5, 12:40 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Rawlins, Sherman, Thomas	2 hr
Jul 5, 2:20 PM CDT	Severe Thunderstorm Watch	SPC	Cheyenne, Decatur, Gove, Logan, Rawlins, Sheridan and 3 more	6 hr
Jul 5, 3:43 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Cherokee, Crawford, Labette and 5 more	92 min
Jul 5, 4:21 PM CDT	Mesoscale Discussion	SPC	Allen, Barber, Bourbon, Butler, Chautauqua, Cherokee and 20 more	114 min
Jul 5, 4:36 PM CDT	Mesoscale Discussion	SPC	Clark, Finney, Ford, Grant, Gray, Hamilton and 7 more	54 min
Jul 5, 4:40 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Barber, Bourbon, Butler, Chautauqua, Cherokee and 17 more	5 hr
Jul 5, 5:45 PM CDT	Severe Thunderstorm Watch	SPC	Clark, Comanche, Edwards, Finney, Ford, Grant and 18 more	6 hr
Jul 5, 5:52 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Graham, Logan, Norton, Rawlins and 4 more	83 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.