Alert archive / Nebraska / Mesoscale Discussions in 2020

Mesoscale Discussion 1476

August 13, 20207 counties in Kansas; 16 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Aug 13, 2020, 3:06 PM CDT for 7 counties in Kansas; 16 counties in Nebraska. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: Aug 13, 2020, 3:06 PM CDT (20:06 UTC)
Expired: Aug 13, 2020, 5:00 PM CDT
In force: 114 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch unlikely
Chance of a watch: 20%

All 23 counties

Cheyenne County, KS, Decatur County, KS, Logan County, KS, Rawlins County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Blaine County, NE, Chase County, NE, Custer County, NE, Dawson County, NE, Dundy County, NE, Frontier County, NE, Gosper County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Perkins County, NE, Red Willow County, NE, Thomas County, NE

The radar

The Goodland radar (KGLD), 140 km from the middle of the area, began a volume at 20:07 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, 8.1 hours before the alert went out and 80 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: 1188 J/kg
Mixed-layer CIN: -431 J/kg
Mixed-layer LCL: 1329 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Aug 13, 12:47 AM CDT	Mesoscale Discussion	SPC	Butler, Chase, Chautauqua, Cowley, Elk, Greenwood and 5 more	118 min
Aug 13, 4:35 AM CDT	Mesoscale Discussion	SPC	Chautauqua, Elk, Greenwood, Labette, Montgomery, Wilson	115 min
Aug 13, 6:22 PM CDT	Mesoscale Discussion	SPC	Blaine, Brown, Custer, Dawson, Keya Paha, Lincoln and 4 more	83 min

Nearby

Mesoscale Discussions in Nebraska, 2020 Mesoscale Discussions in Kansas, 2020 Every mesoscale discussion in 2020

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.