Alert archive / Kansas / Mesoscale Discussions in 2017

Mesoscale Discussion 1180

June 28, 2017Cheyenne County, Kit Carson County, Lincoln County, Colorado; 6 counties in Kansas

The Storm Prediction Center issued this mesoscale discussion at Jun 28, 2017, 10:38 PM MDT for Cheyenne County, Kit Carson County, Lincoln County, Colorado; 6 counties in Kansas. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued: Jun 28, 2017, 10:38 PM MDT (04:38 UTC)
Expired: Jun 28, 2017, 11:45 PM MDT
In force: 67 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Cheyenne County, CO, Kit Carson County, CO, Lincoln County, CO, Cheyenne County, KS, Logan County, KS, Rawlins County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS

The radar

The Goodland radar (KGLD), 64 km from the middle of the area, began a volume at 04:39 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 379Jun 29, 12:20 AM MDT

The nearest sounding before it

Denver, CO (KDEN), launched 00:00Z, 4.6 hours before the alert went out and 91 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: 218 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 3443 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 144 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
Jun 29, 1:05 PM MDT	Mesoscale Discussion	SPC	Cheyenne, Elbert, Kiowa, Kit Carson, Lincoln	2 hr
Jun 29, 1:50 PM MDT	Severe Thunderstorm Watch	SPC	Baca, Bent, Cheyenne, Crowley, Elbert, El Paso and 5 more	7 hr
Jun 28, 11:47 PM MDT	Mesoscale Discussion	SPC	Barton, Chase, Clay, Cloud, Dickinson, Ellis and 26 more	58 min
Jun 29, 12:22 AM MDT	Severe Thunderstorm Watch	SPC	Barton, Cheyenne, Clay, Cloud, Decatur, Dickinson and 36 more	8 hr
Jun 29, 3:52 AM MDT	Mesoscale Discussion	SPC	Clay, Cloud, Coffey, Dickinson, Douglas, Franklin and 22 more	53 min
Jun 29, 2:12 PM MDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Butler, Chase, Coffey and 28 more	3 hr

Nearby

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