Alert archive / Kansas / Mesoscale Discussions in 2015

Mesoscale Discussion 1475

July 18, 20158 counties in Kansas; 5 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 18, 2015, 10:54 PM CDT for 8 counties in Kansas; 5 counties in Nebraska. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Jul 18, 2015, 10:54 PM CDT (03:54 UTC)
Expired: Jul 19, 2015, 12:30 AM CDT
In force: 96 min
Issued by: the Storm Prediction Center

Counties Decatur County, KS, Gove County, KS, Logan County, KS, Rawlins County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Frontier County, NE, Hayes County, NE, Hitchcock County, NE, Lincoln County, NE, Red Willow County, NE

The radar

The Goodland radar (KGLD), 73 km from the middle of the area, began a volume at 03:53 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 3.9 hours before the alert went out and 161 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: 663 J/kg
Mixed-layer CIN: -133 J/kg
Mixed-layer LCL: 1880 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 18, 7:41 PM CDT	Severe Thunderstorm Watch	SPC	Cheyenne, Decatur, Gove, Logan, Rawlins, Sheridan and 3 more	6 hr
Jul 18, 8:30 PM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Clay, Dickinson, Doniphan, Douglas and 12 more	60 min
Jul 19, 1:03 AM CDT	Mesoscale Discussion	SPC	Decatur, Ellis, Gove, Graham, Lane, Ness and 7 more	57 min
Jul 19, 2:57 AM CDT	Severe Thunderstorm Watch	SPC	Barton, Clay, Cloud, Dickinson, Ellis, Ellsworth and 20 more	5 hr
Jul 19, 5:05 AM CDT	Mesoscale Discussion	SPC	Clay, Cloud, Geary, Jewell, Marshall, Ottawa and 4 more	85 min
Jul 19, 2:18 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Greeley, Hamilton, Kearny, Logan, Rawlins and 6 more	117 min
Jul 19, 3:37 PM CDT	Severe Thunderstorm Watch	SPC	Cheyenne, Clark, Comanche, Edwards, Finney, Ford and 24 more	8 hr
Jul 19, 5:40 PM CDT	Mesoscale Discussion	SPC	Antelope, Blaine, Brown, Cherry, Garfield, Holt and 5 more	95 min
Jul 19, 5:43 PM CDT	Mesoscale Discussion	SPC	Arthur, Chase, Custer, Dawson, Deuel, Frontier and 10 more	2 hr

Nearby

Mesoscale Discussions in Kansas, 2015 Mesoscale Discussions in Nebraska, 2015 Every mesoscale discussion in 2015

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.