Alert archive / Nebraska / Mesoscale Discussions in 2016

Mesoscale Discussion 1414

July 28, 2016Logan County, Phillips County, Sedgwick County, Colorado; 11 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 28, 2016, 9:43 AM MDT for Logan County, Phillips County, Sedgwick County, Colorado; 11 counties in Nebraska. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Jul 28, 2016, 9:43 AM MDT (15:43 UTC)
Expired: Jul 28, 2016, 11:15 AM MDT
In force: 92 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Logan County, CO, Phillips County, CO, Sedgwick County, CO, Arthur County, NE, Banner County, NE, Chase County, NE, Cheyenne County, NE, Deuel County, NE, Garden County, NE, Keith County, NE, Kimball County, NE, Morrill County, NE, Perkins County, NE, Scotts Bluff County, NE

The radar

The Cheyenne radar (KCYS), 152 km from the middle of the area, began a volume at 15:44 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

Denver, CO (KDEN), launched 12:00Z, 3.7 hours before the alert went out and 151 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: 718 J/kg
Mixed-layer CIN: -355 J/kg
Mixed-layer LCL: 1490 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 148 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 28, 1:58 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Bent, Broomfield, Cheyenne, Crowley and 16 more	2 hr
Jul 28, 12:59 PM MDT	Mesoscale Discussion	SPC	Frontier, Furnas, Gosper, Harlan, Hitchcock, Red Willow	2 hr
Jul 28, 2:46 PM MDT	Severe Thunderstorm Watch	SPC	Franklin, Furnas, Harlan	6 hr

Nearby

Mesoscale Discussions in Nebraska, 2016 Mesoscale Discussions in Colorado, 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.