Alert archive / Kansas / Mesoscale Discussions in 2014

Mesoscale Discussion 1569

August 17, 201415 counties in Kansas; Gage County, Jefferson County, Thayer County, Nebraska

The Storm Prediction Center issued this mesoscale discussion at Aug 17, 2014, 10:34 PM CDT for 15 counties in Kansas; Gage County, Jefferson County, Thayer County, Nebraska. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued: Aug 17, 2014, 10:34 PM CDT (03:34 UTC)
Expired: Aug 17, 2014, 11:30 PM CDT
In force: 56 min
Issued by: the Storm Prediction Center

Counties Chase County, KS, Clay County, KS, Cloud County, KS, Dickinson County, KS, Geary County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Morris County, KS, Ottawa County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Saline County, KS, Washington County, KS, Gage County, NE, Jefferson County, NE, Thayer County, NE

The radar

The Topeka radar (KTWX), 89 km from the middle of the area, began a volume at 03:36 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, 3.6 hours before the alert went out and 139 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: 115 J/kg
Mixed-layer CIN: -328 J/kg
Mixed-layer LCL: 1603 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Aug 17, 8:57 PM CDT	Mesoscale Discussion	SPC	Cloud, Jewell, Lincoln, Mitchell, Osborne, Ottawa and 2 more	63 min
Aug 17, 9:07 PM CDT	Severe Thunderstorm Watch	SPC	Clay, Cloud, Dickinson, Ellsworth, Geary, Jewell and 13 more	4 hr
Aug 18, 3:48 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Sherman	87 min

Nearby

Mesoscale Discussions in Kansas, 2014 Mesoscale Discussions in Nebraska, 2014 Every mesoscale discussion in 2014

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.