Alert archive / Kansas / Mesoscale Discussions in 2017

Mesoscale Discussion 1505

August 16, 20175 counties in Kansas

The Storm Prediction Center issued this mesoscale discussion at Aug 16, 2017, 5:23 AM CDT for 5 counties in Kansas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Aug 16, 2017, 5:23 AM CDT (10:23 UTC)
Expired: Aug 16, 2017, 7:30 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Clay County, KS, Dickinson County, KS, Geary County, KS, Lincoln County, KS, Ottawa County, KS

The radar

The Topeka radar (KTWX), 106 km from the middle of the area, began a volume at 10:22 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

Topeka, KS (KFOE), launched 00:00Z, 10.4 hours before the alert went out and 157 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: 1383 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 1221 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 16, 1:33 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Barber, Bourbon, Butler, Chase and 19 more	117 min
Aug 16, 2:48 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 24 more	9 hr
Aug 16, 4:47 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Butler, Chautauqua, Cherokee and 16 more	88 min

Nearby

Mesoscale Discussions in Kansas, 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.