Alert archive / Kansas / Mesoscale Discussions in 2016

Mesoscale Discussion 1760

October 4, 20168 counties in Kansas; Osage County, Pawnee County, Washington County, Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Oct 4, 2016, 7:49 PM CDT for 8 counties in Kansas; Osage County, Pawnee County, Washington County, Oklahoma. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Oct 4, 2016, 7:49 PM CDT (00:49 UTC)
Expired: Oct 4, 2016, 10:15 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Chautauqua County, KS, Coffey County, KS, Cowley County, KS, Elk County, KS, Greenwood County, KS, Montgomery County, KS, Wilson County, KS, Woodson County, KS, Osage County, OK, Pawnee County, OK, Washington County, OK

The radar

The Wichita radar (KICT), 121 km from the middle of the area, began a volume at 00:48 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Severe Thunderstorm Watch 492Oct 4, 8:40 PM CDT

The nearest sounding before it

Topeka, KS (KFOE), launched 00:00Z, 0.8 hours before the alert went out and 211 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: 616 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 1248 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 397 m²/s²
0-3 km storm-relative helicity: 510 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 9.0

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
Oct 4, 8:38 PM CDT	Severe Thunderstorm Watch	SPC	Butler, Chase, Chautauqua, Cowley, Elk, Greenwood and 3 more	3 hr
Oct 4, 11:28 PM CDT	Mesoscale Discussion	SPC	Bourbon, Cherokee, Crawford, Labette, Montgomery, Neosho	62 min
Oct 4, 7:17 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Caddo, Canadian, Carter, Cleveland and 25 more	118 min
Oct 5, 5:36 PM CDT	Mesoscale Discussion	SPC	Carter, Cotton, Jefferson, Stephens	54 min

Nearby

Mesoscale Discussions in Kansas, 2016 Mesoscale Discussions in Oklahoma, 2016 Every mesoscale discussion in 2016

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.