Alert archive / Nebraska / Mesoscale Discussions in 2019

Mesoscale Discussion 1963

September 11, 20194 counties in Kansas; 23 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Sep 11, 2019, 11:36 PM CDT for 4 counties in Kansas; 23 counties in Nebraska. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Sep 11, 2019, 11:36 PM CDT (04:36 UTC)
Expired: Sep 12, 2019, 1:00 AM CDT
In force: 84 min
Issued by: the Storm Prediction Center

All 27 counties

Decatur County, KS, Norton County, KS, Phillips County, KS, Rawlins County, KS, Adams County, NE, Antelope 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, 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 Grand Island radar (KUEX), 128 km from the middle of the area, began a volume at 04:37 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 00:00Z, 4.6 hours before the alert went out and 75 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: 1882 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 2021 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 12, 2:02 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Atchison, Bourbon, Butler, Chase and 26 more	118 min
Sep 11, 8:03 PM CDT	Severe Thunderstorm Watch	SPC	Antelope, Boone, Cedar, Dakota, Dixon, Knox and 3 more	7 hr
Sep 11, 8:14 PM CDT	Mesoscale Discussion	SPC	Arthur, Blaine, Boyd, Brown, Chase, Cherry and 24 more	2 hr

Nearby

Mesoscale Discussions in Nebraska, 2019 Mesoscale Discussions in Kansas, 2019 Every mesoscale discussion in 2019

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.