Alert archive / Nebraska / Mesoscale Discussions in 2003

Mesoscale Discussion 1660

July 6, 20035 counties in Colorado; 14 counties in Kansas; 32 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 6, 2003, 5:24 PM MDT for 5 counties in Colorado; 14 counties in Kansas; 32 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 6, 2003, 5:24 PM MDT (23:24 UTC)
Expired: Jul 6, 2003, 7:30 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 51 counties

Cheyenne County, CO, Kiowa County, CO, Kit Carson County, CO, Phillips County, CO, Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Graham County, KS, Greeley County, KS, Logan County, KS, Norton County, KS, Phillips County, KS, Rawlins County, KS, Sheridan County, KS, Sherman County, KS, Smith County, KS, Thomas County, KS, Wallace County, KS, Wichita County, KS, Adams County, NE, Buffalo County, NE, Chase County, NE, Clay County, NE, Custer County, NE, Dawson County, NE, Dundy County, NE, Fillmore County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gosper County, NE, Greeley County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Howard County, NE, Kearney County, NE, Lincoln County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Perkins County, NE, Phelps County, NE, Polk County, NE, Red Willow County, NE, Sherman County, NE, Valley County, NE, Webster County, NE, York County, NE

The radar

The Goodland radar (KGLD), 104 km from the middle of the area, began a volume at 23:26 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

Denver, CO (KDNR), launched 12:00Z, 11.4 hours before the alert went out and 224 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: 15 J/kg
Mixed-layer CIN: -544 J/kg
Mixed-layer LCL: 3624 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 69 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 5, 6:38 PM MDT	Mesoscale Discussion	SPC	Baca, Bent, Cheyenne, Kiowa, Prowers	67 min
Jul 6, 1:47 PM MDT	Mesoscale Discussion	SPC	Baca, Bent, Cheyenne, Crowley, Kiowa, Kit Carson and 3 more	118 min
Jul 6, 5:40 PM MDT	Severe Thunderstorm Watch	SPC	Cheyenne, Kit Carson, Phillips, Sedgwick, Yuma	5 hr
Jul 5, 6:20 PM MDT	Tornado Watch	SPC	Antelope, Blaine, Boone, Boyd, Brown, Buffalo and 44 more	6 hr
Jul 5, 9:57 PM MDT	Mesoscale Discussion	SPC	Boone, Burt, Butler, Cass, Colfax, Cuming and 16 more	63 min
Jul 5, 10:50 PM MDT	Severe Thunderstorm Watch	SPC	Burt, Butler, Cass, Cedar, Colfax, Cuming and 21 more	5 hr

Nearby

Mesoscale Discussions in Nebraska, 2003 Mesoscale Discussions in Kansas, 2003 Mesoscale Discussions in Colorado, 2003 Every mesoscale discussion in 2003

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.