Alert archive / Nebraska / Mesoscale Discussions in 2016

Mesoscale Discussion 1454

July 31, 20168 counties in Kansas; 21 counties in Nebraska; Charles Mix County, Gregory County, Tripp County, South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 31, 2016, 12:53 AM CDT for 8 counties in Kansas; 21 counties in Nebraska; Charles Mix County, Gregory County, Tripp County, South Dakota. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Jul 31, 2016, 12:53 AM CDT (05:53 UTC)
Expired: Jul 31, 2016, 2:30 AM CDT
In force: 97 min
Issued by: the Storm Prediction Center

All 32 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, Blaine County, NE, Boyd County, NE, Brown County, NE, Cherry County, NE, Custer County, NE, Dawson County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Garfield County, NE, Gosper County, NE, Harlan County, NE, Holt County, NE, Hooker County, NE, Keya Paha County, NE, Logan County, NE, Loup County, NE, Phelps County, NE, Red Willow County, NE, Rock County, NE, Thomas County, NE, Charles Mix County, SD, Gregory County, SD, Tripp County, SD

The radar

The North Platte radar (KLNX), 94 km from the middle of the area, began a volume at 05:56 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, 5.9 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: 1833 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 1461 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 6.7

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 30, 7:28 PM CDT	Mesoscale Discussion	SPC	Arthur, Blaine, Box Butte, Brown, Buffalo, Cherry and 28 more	92 min
Jul 30, 9:32 PM CDT	Severe Thunderstorm Watch	SPC	Arthur, Blaine, Box Butte, Boyd, Brown, Cherry and 18 more	7 hr
Jul 30, 11:03 PM CDT	Mesoscale Discussion	SPC	Arthur, Blaine, Box Butte, Brown, Cherry, Custer and 13 more	117 min
Jul 31, 1:00 PM CDT	Mesoscale Discussion	SPC	Box Butte, Dawes, Scotts Bluff, Sheridan, Sioux	90 min
Jul 31, 3:48 PM CDT	Severe Thunderstorm Watch	SPC	Arthur, Box Butte, Cherry, Dawes, Deuel, Garden and 6 more	7 hr
Jul 31, 5:42 PM CDT	Mesoscale Discussion	SPC	Arthur, Banner, Box Butte, Cherry, Cheyenne, Dawes and 10 more	2 hr
Jul 30, 7:34 PM CDT	Mesoscale Discussion	SPC	Dewey, Hughes, Hyde, Jones, Lyman, Potter and 3 more	86 min
Jul 30, 7:48 PM CDT	Severe Thunderstorm Watch	SPC	Buffalo, Hughes, Hyde, Jones, Lyman, Potter and 2 more	4 hr
Jul 30, 9:50 PM CDT	Mesoscale Discussion	SPC	Hughes, Hyde, Jones, Lyman, Stanley	55 min
Jul 31, 2:27 PM CDT	Mesoscale Discussion	SPC	Corson, Harding, Perkins, Ziebach	2 hr

Nearby

Mesoscale Discussions in Nebraska, 2016 Mesoscale Discussions in Kansas, 2016 Mesoscale Discussions in South Dakota, 2016 Every mesoscale discussion in 2016

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.