Alert archive / Nebraska / Mesoscale Discussions in 2017

Mesoscale Discussion 1435

August 2, 20178 counties in Colorado; 6 counties in Kansas; 15 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Aug 2, 2017, 5:12 PM MDT for 8 counties in Colorado; 6 counties in Kansas; 15 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Aug 2, 2017, 5:12 PM MDT (23:12 UTC)
Expired: Aug 2, 2017, 7:15 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 29 counties

Cheyenne County, CO, Kit Carson County, CO, Lincoln County, CO, Logan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Logan County, KS, Rawlins County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Arthur County, NE, Chase County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Hooker County, NE, Keith County, NE, Lincoln County, NE, Logan County, NE, McPherson County, NE, Perkins County, NE, Thomas County, NE

The radar

The Goodland radar (KGLD), 71 km from the middle of the area, began a volume at 23:14 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, 11.2 hours before the alert went out and 101 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: 4 J/kg
Mixed-layer CIN: -450 J/kg
Mixed-layer LCL: 2910 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 197 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 2, 1:15 PM MDT	Mesoscale Discussion	SPC	Logan, Phillips, Sedgwick, Yuma	3 hr
Aug 2, 2:36 PM MDT	Severe Thunderstorm Watch	SPC	Kit Carson, Logan, Phillips, Sedgwick, Washington, Yuma	6 hr

Nearby

Mesoscale Discussions in Nebraska, 2017 Mesoscale Discussions in Colorado, 2017 Mesoscale Discussions in Kansas, 2017 Every mesoscale discussion in 2017

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.