Alert archive / Nebraska / Mesoscale Discussions in 2020

Mesoscale Discussion 1165

July 10, 202011 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 10, 2020, 1:09 AM CDT for 11 counties in Nebraska. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Jul 10, 2020, 1:09 AM CDT (06:09 UTC)
Expired: Jul 10, 2020, 3:45 AM CDT
In force: 3 hr
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch unlikely
Chance of a watch: 20%

Counties Adams County, NE, Buffalo County, NE, Custer County, NE, Dawson County, NE, Franklin County, NE, Gosper County, NE, Harlan County, NE, Kearney County, NE, Phelps County, NE, Sherman County, NE, Webster County, NE

The radar

The Grand Island radar (KUEX), 115 km from the middle of the area, began a volume at 06:09 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, 6.2 hours before the alert went out and 89 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: 912 J/kg
Mixed-layer CIN: -134 J/kg
Mixed-layer LCL: 1847 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 223 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.1

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
Jul 9, 9:05 PM CDT	Mesoscale Discussion	SPC	Arthur, Box Butte, Cheyenne, Deuel, Garden, Grant and 2 more	55 min
Jul 10, 9:13 AM CDT	Mesoscale Discussion	SPC	Brown, Cherry, Keya Paha, Rock	62 min
Jul 10, 1:26 PM CDT	Mesoscale Discussion	SPC	Keya Paha	2 hr
Jul 10, 2:34 PM CDT	Mesoscale Discussion	SPC	Antelope, Blaine, Boone, Brown, Buffalo, Cherry and 21 more	116 min
Jul 10, 3:14 PM CDT	Mesoscale Discussion	SPC	Arthur, Box Butte, Dawes, Deuel, Garden, Grant and 4 more	2 hr
Jul 10, 3:43 PM CDT	Mesoscale Discussion	SPC	Dawes, Keya Paha	2 hr
Jul 10, 5:35 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Buffalo, Dawson, Franklin, Furnas, Gosper and 5 more	3 hr
Jul 10, 6:31 PM CDT	Mesoscale Discussion	SPC	Cherry	119 min

Nearby

Mesoscale Discussions in Nebraska, 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.