Alert archive / Nebraska / Mesoscale Discussions in 2003

Mesoscale Discussion 467

April 15, 20039 counties in Kansas; 11 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Apr 15, 2003, 6:57 PM CDT for 9 counties in Kansas; 11 counties in Nebraska. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Apr 15, 2003, 6:57 PM CDT (23:57 UTC)
Expired: Apr 15, 2003, 8:30 PM CDT
In force: 93 min
Issued by: the Storm Prediction Center

Counties Decatur County, KS, Graham County, KS, Norton County, KS, Osborne County, KS, Phillips County, KS, Rooks County, KS, Sheridan County, KS, Smith County, KS, Trego County, KS, Buffalo County, NE, Dawson County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gosper County, NE, Harlan County, NE, Hitchcock County, NE, Kearney County, NE, Phelps County, NE, Red Willow County, NE

The radar

The Grand Island radar (KUEX), 129 km from the middle of the area, began a volume at 23:57 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 nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 12.0 hours before the alert went out and 160 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3632 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 131 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
Apr 15, 12:41 PM CDT	Mesoscale Discussion	SPC	Clark, Finney, Ford, Grant, Gray, Haskell and 7 more	3 hr
Apr 15, 2:10 PM CDT	Tornado Watch	SPC	Clark, Comanche, Edwards, Finney, Ford, Grant and 14 more	5 hr
Apr 15, 3:32 PM CDT	Mesoscale Discussion	SPC	Clark, Comanche, Edwards, Ford, Kiowa	118 min
Apr 15, 3:45 PM CDT	Tornado Watch	SPC	Decatur, Ellis, Gove, Graham, Logan, Norton and 10 more	5 hr
Apr 15, 5:55 PM CDT	Mesoscale Discussion	SPC	Barber, Clark, Comanche, Edwards, Ford, Gray and 6 more	65 min
Apr 15, 6:30 PM CDT	Tornado Watch	SPC	Barber, Barton, Clark, Comanche, Edwards, Ford and 16 more	5 hr
Apr 15, 4:46 PM CDT	Mesoscale Discussion	SPC	Antelope, Blaine, Boone, Boyd, Brown, Cedar and 19 more	89 min
Apr 15, 5:15 PM CDT	Severe Thunderstorm Watch	SPC	Antelope, Blaine, Boone, Boyd, Brown, Cedar and 25 more	6 hr

Nearby

Mesoscale Discussions in Nebraska, 2003 Mesoscale Discussions in Kansas, 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.