Alert archive / Kansas / Mesoscale Discussions in 2018

Mesoscale Discussion 1240

August 5, 201818 counties in Kansas; Harlan County, Nebraska

The Storm Prediction Center issued this mesoscale discussion at Aug 5, 2018, 8:16 PM CDT for 18 counties in Kansas; Harlan County, Nebraska. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: Aug 5, 2018, 8:16 PM CDT (01:16 UTC)
Expired: Aug 5, 2018, 10:15 PM CDT
In force: 119 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Decatur County, KS, Ellis County, KS, Gove County, KS, Graham County, KS, Lane County, KS, Logan County, KS, Ness County, KS, Norton County, KS, Phillips County, KS, Rawlins County, KS, Rooks County, KS, Scott County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Trego County, KS, Wallace County, KS, Wichita County, KS, Harlan County, NE

The radar

The Goodland radar (KGLD), 104 km from the middle of the area, began a volume at 01:19 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, 1.3 hours before the alert went out and 146 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: 424 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 2695 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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
Aug 6, 6:38 PM CDT	Mesoscale Discussion	SPC	Brown, Doniphan, Nemaha	2 hr
Aug 5, 7:05 PM CDT	Mesoscale Discussion	SPC	Banner, Cheyenne, Kimball, Scotts Bluff, Sioux	115 min
Aug 5, 9:32 PM CDT	Mesoscale Discussion	SPC	Adams, Burt, Butler, Cass, Clay, Colfax and 17 more	2 hr
Aug 6, 2:31 PM CDT	Mesoscale Discussion	SPC	Boone, Buffalo, Burt, Butler, Cass, Colfax and 26 more	89 min
Aug 6, 3:02 PM CDT	Mesoscale Discussion	SPC	Banner, Kimball	88 min
Aug 6, 3:37 PM CDT	Severe Thunderstorm Watch	SPC	Banner, Cheyenne, Kimball, Morrill, Scotts Bluff	7 hr
Aug 6, 3:49 PM CDT	Mesoscale Discussion	SPC	Box Butte, Cherry, Dawes, Sheridan, Sioux	86 min
Aug 6, 6:24 PM CDT	Mesoscale Discussion	SPC	Banner, Box Butte, Cheyenne, Kimball, Morrill, Scotts Bluff and 1 more	66 min

Nearby

Mesoscale Discussions in Kansas, 2018 Mesoscale Discussions in Nebraska, 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.