Alert archive / Kansas / Mesoscale Discussions in 2017

Mesoscale Discussion 1175

June 28, 201710 counties in Kansas; 6 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 28, 2017, 5:46 PM CDT for 10 counties in Kansas; 6 counties in Nebraska. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: Jun 28, 2017, 5:46 PM CDT (22:46 UTC)
Expired: Jun 28, 2017, 7:15 PM CDT
In force: 89 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Clay County, KS, Cloud County, KS, Jewell County, KS, Marshall County, KS, Mitchell County, KS, Nemaha County, KS, Ottawa County, KS, Republic County, KS, Riley County, KS, Washington County, KS, Gage County, NE, Jefferson County, NE, Johnson County, NE, Pawnee County, NE, Richardson County, NE, Thayer County, NE

The radar

The Topeka radar (KTWX), 110 km from the middle of the area, began a volume at 22:47 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

Omaha, NE (KOAX), launched 12:00Z, 10.8 hours before the alert went out and 172 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: 742 J/kg
Mixed-layer CIN: -297 J/kg
Mixed-layer LCL: 831 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 721 m²/s²
0-3 km storm-relative helicity: 852 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

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
Jun 27, 7:35 PM CDT	Severe Thunderstorm Watch	SPC	Dakota, Dixon	5 hr
Jun 27, 8:12 PM CDT	Mesoscale Discussion	SPC	Antelope, Blaine, Boone, Boyd, Brown, Buffalo and 27 more	93 min
Jun 27, 8:56 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Antelope, Boone, Boyd, Buffalo, Butler and 37 more	5 hr
Jun 27, 11:33 PM CDT	Mesoscale Discussion	SPC	Burt, Cass, Dodge, Douglas, Lancaster, Otoe and 4 more	57 min
Jun 28, 2:14 PM CDT	Mesoscale Discussion	SPC	Otoe	2 hr
Jun 28, 2:53 PM CDT	Tornado Watch	SPC	Cass, Douglas, Nemaha, Otoe, Richardson, Sarpy	9 hr
Jun 28, 4:07 PM CDT	Mesoscale Discussion	SPC	Banner, Box Butte, Cheyenne, Dawes, Deuel, Garden and 5 more	113 min
Jun 28, 5:29 PM CDT	Mesoscale Discussion	SPC	Nemaha	91 min

Nearby

Mesoscale Discussions in Kansas, 2017 Mesoscale Discussions in Nebraska, 2017 Every mesoscale discussion in 2017

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.