Alert archive / Kansas / Mesoscale Discussions in 2018

Mesoscale Discussion 1179

July 27, 2018Cheyenne County, Colorado; 17 counties in Kansas

The Storm Prediction Center issued this mesoscale discussion at Jul 27, 2018, 5:23 PM MDT for Cheyenne County, Colorado; 17 counties in Kansas. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Jul 27, 2018, 5:23 PM MDT (23:23 UTC)
Expired: Jul 27, 2018, 7:00 PM MDT
In force: 97 min
Issued by: the Storm Prediction Center

Counties Cheyenne County, CO, Edwards County, KS, Finney County, KS, Ford County, KS, Gove County, KS, Gray County, KS, Greeley County, KS, Hamilton County, KS, Hodgeman County, KS, Kearny County, KS, Lane County, KS, Logan County, KS, Ness County, KS, Rush County, KS, Scott County, KS, Trego County, KS, Wallace County, KS, Wichita County, KS

The radar

The Dodge City radar (KDDC), 93 km from the middle of the area, began a volume at 23:26 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

Dodge City, (KDDC), launched 12:00Z, 11.4 hours before the alert went out and 97 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: 163 J/kg
Mixed-layer CIN: -129 J/kg
Mixed-layer LCL: 971 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 29 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
Jul 26, 6:07 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Boulder, Broomfield, Cheyenne, Crowley and 18 more	113 min
Jul 26, 8:53 PM MDT	Mesoscale Discussion	SPC	Prowers	2 hr
Jul 27, 12:35 PM MDT	Mesoscale Discussion	SPC	Adams, Kit Carson, Logan, Morgan, Phillips, Sedgwick and 3 more	85 min
Jul 27, 1:04 PM MDT	Tornado Watch	SPC	Adams, Arapahoe, Cheyenne, Elbert, Kit Carson, Larimer and 8 more	8 hr
Jul 27, 2:52 PM MDT	Mesoscale Discussion	SPC	Bent, Cheyenne, Crowley, Elbert, El Paso, Huerfano and 8 more	83 min
Jul 27, 3:43 PM MDT	Severe Thunderstorm Watch	SPC	Baca, Bent, Crowley, El Paso, Huerfano, Kiowa and 4 more	5 hr
Jul 27, 4:05 PM MDT	Severe Thunderstorm Watch	SPC	Barber, Barton, Clark, Comanche, Edwards, Ellis and 25 more	9 hr

Nearby

Mesoscale Discussions in Kansas, 2018 Mesoscale Discussions in Colorado, 2018 Every mesoscale discussion in 2018

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.