Alert archive / Kansas / Mesoscale Discussions in 2018

Mesoscale Discussion 1180

July 27, 201817 counties in Kansas

The Storm Prediction Center issued this mesoscale discussion at Jul 27, 2018, 8:24 PM CDT for 17 counties in Kansas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 27, 2018, 8:24 PM CDT (01:24 UTC)
Expired: Jul 27, 2018, 10:30 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Clark County, KS, Finney County, KS, Ford County, KS, Grant County, KS, Gray County, KS, Hamilton County, KS, Haskell County, KS, Hodgeman County, KS, Kearny County, KS, Kiowa County, KS, Meade County, KS, Morton County, KS, Scott County, KS, Seward County, KS, Stanton County, KS, Stevens County, KS, Wichita County, KS

The radar

The Dodge City radar (KDDC), 74 km from the middle of the area, began a volume at 01:24 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 00:00Z, 1.4 hours before the alert went out and 80 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: 948 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 1548 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.5

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, 3:41 PM CDT	Mesoscale Discussion	SPC	Cherokee, Labette, Neosho	64 min
Jul 28, 6:01 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Rawlins, Sherman, Thomas	119 min
Jul 28, 6:40 PM CDT	Severe Thunderstorm Watch	SPC	Cheyenne, Decatur, Gove, Graham, Greeley, Logan and 7 more	7 hr

Nearby

Mesoscale Discussions in Kansas, 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.