Alert archive / Kansas / Mesoscale Discussions in 2018

Mesoscale Discussion 1190

July 28, 20188 counties in Kansas; 4 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jul 28, 2018, 10:46 PM CDT for 8 counties in Kansas; 4 counties in Nebraska. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: Jul 28, 2018, 10:46 PM CDT (03:46 UTC)
Expired: Jul 29, 2018, 12:15 AM CDT
In force: 89 min
Issued by: the Storm Prediction Center

Counties Decatur County, KS, Gove County, KS, Graham County, KS, Logan County, KS, Norton County, KS, Rawlins County, KS, Sheridan County, KS, Thomas County, KS, Dundy County, NE, Hayes County, NE, Hitchcock County, NE, Red Willow County, NE

The radar

The Goodland radar (KGLD), 103 km from the middle of the area, began a volume at 03:49 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, 3.8 hours before the alert went out and 147 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: 565 J/kg
Mixed-layer CIN: -119 J/kg
Mixed-layer LCL: 1240 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 208 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 4.8

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, 11:10 PM CDT	Mesoscale Discussion	SPC	Barber, Barton, Clark, Comanche, Edwards, Finney and 12 more	2 hr
Jul 29, 1:59 AM CDT	Severe Thunderstorm Watch	SPC	Barber, Barton, Butler, Chase, Chautauqua, Cowley and 15 more	5 hr
Jul 29, 4:00 AM CDT	Mesoscale Discussion	SPC	Butler, Chautauqua, Cowley, Harper, Harvey, Sedgwick and 1 more	2 hr
Jul 29, 1:46 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Rawlins, Sherman	59 min
Jul 29, 2:07 PM CDT	Tornado Watch	SPC	Greeley, Sherman, Wallace	8 hr
Jul 29, 2:34 PM CDT	Severe Thunderstorm Watch	SPC	Cheyenne, Gove, Logan, Rawlins, Sheridan, Thomas and 1 more	7 hr
Jul 29, 5:07 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Gove, Lane, Logan, Rawlins and 5 more	53 min
Jul 29, 6:23 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Greeley, Sherman, Wallace	67 min
Jul 28, 7:38 PM CDT	Mesoscale Discussion	SPC	Banner, Box Butte, Dawes, Kimball, Morrill, Scotts Bluff and 1 more	97 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.