Alert archive / Kansas / Mesoscale Discussions in 2013

Mesoscale Discussion 393

April 7, 201318 counties in Kansas; Platte County, Missouri

The Storm Prediction Center issued this mesoscale discussion at Apr 7, 2013, 6:22 PM CDT for 18 counties in Kansas; Platte County, Missouri. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Apr 7, 2013, 6:22 PM CDT (23:22 UTC)
Expired: Apr 7, 2013, 7:15 PM CDT
In force: 53 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Atchison County, KS, Clay County, KS, Douglas County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Marshall County, KS, Osage County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS, Wyandotte County, KS, Platte County, MO

The radar

The Topeka radar (KTWX), 32 km from the middle of the area, began a volume at 23:23 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 (KTOP), launched 12:00Z, 11.4 hours before the alert went out and 55 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2207 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 47 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
Apr 7, 1:47 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Butler, Chase, Coffey and 15 more	118 min
Apr 7, 2:19 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Bourbon, Butler, Chautauqua, Cherokee, Cowley and 8 more	8 hr
Apr 7, 3:42 PM CDT	Mesoscale Discussion	SPC	Barton, Edwards, Ellis, Ellsworth, Ford, Hodgeman and 10 more	2 hr
Apr 7, 5:36 PM CDT	Severe Thunderstorm Watch	SPC	Barber, Barton, Clark, Comanche, Edwards, Ellis and 27 more	4 hr
Apr 7, 6:10 PM CDT	Mesoscale Discussion	SPC	Allen, Bourbon, Butler, Chautauqua, Cherokee, Cowley and 8 more	65 min

Nearby

Mesoscale Discussions in Kansas, 2013 Mesoscale Discussions in Missouri, 2013 Every mesoscale discussion in 2013

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.