Alert archive / Kansas / Mesoscale Discussions in 2017

Mesoscale Discussion 1164

June 27, 20177 counties in Colorado; 8 counties in Kansas; Chase County, Dundy County, Hitchcock County, Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 27, 2017, 2:48 PM MDT for 7 counties in Colorado; 8 counties in Kansas; Chase County, Dundy County, Hitchcock County, Nebraska. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued: Jun 27, 2017, 2:48 PM MDT (20:48 UTC)
Expired: Jun 27, 2017, 4:45 PM MDT
In force: 117 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Cheyenne County, CO, Kit Carson County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Greeley County, KS, Logan County, KS, Rawlins County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Wichita County, KS, Chase County, NE, Dundy County, NE, Hitchcock County, NE

The radar

The Goodland radar (KGLD), 94 km from the middle of the area, began a volume at 20:51 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 372Jun 27, 4:05 PM MDT

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 8.8 hours before the alert went out and 50 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: 34 J/kg
Mixed-layer CIN: -526 J/kg
Mixed-layer LCL: 2742 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 95 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
Jun 26, 6:25 PM MDT	Mesoscale Discussion	SPC	Allen, Butler, Chase, Chautauqua, Cowley, Elk and 10 more	2 hr
Jun 27, 2:04 PM MDT	Mesoscale Discussion	SPC	Banner, Box Butte, Cheyenne, Dawes, Deuel, Garden and 5 more	2 hr
Jun 27, 4:07 PM MDT	Severe Thunderstorm Watch	SPC	Arthur, Blaine, Brown, Chase, Cherry, Custer and 16 more	6 hr

Nearby

Mesoscale Discussions in Kansas, 2017 Mesoscale Discussions in Colorado, 2017 Mesoscale Discussions in Nebraska, 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.