Alert archive / Kansas / Mesoscale Discussions in 2022

Mesoscale Discussion 809

May 17, 20229 counties in Kansas; Cass County, Jackson County, Missouri

The Storm Prediction Center issued this mesoscale discussion at May 17, 2022, 10:18 PM CDT for 9 counties in Kansas; Cass County, Jackson County, Missouri. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: May 17, 2022, 10:18 PM CDT (03:18 UTC)
Expired: May 17, 2022, 11:15 PM CDT
In force: 57 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 237

Counties Douglas County, KS, Franklin County, KS, Jefferson County, KS, Johnson County, KS, Leavenworth County, KS, Miami County, KS, Osage County, KS, Shawnee County, KS, Wyandotte County, KS, Cass County, MO, Jackson County, MO

The radar

The Topeka radar (KTWX), 79 km from the middle of the area, began a volume at 03:23 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 00:00Z, 3.3 hours before the alert went out and 30 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: 3291 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 1029 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 187 m²/s²
Significant tornado parameter: 2.1
Supercell composite: 10.5

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
May 17, 8:06 PM CDT	Mesoscale Discussion	SPC	Anderson, Atchison, Barton, Butler, Chase, Clay and 34 more	84 min
May 17, 8:32 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Atchison, Butler, Chase, Chautauqua and 34 more	6 hr
May 17, 9:25 PM CDT	Mesoscale Discussion	SPC	Chase, Dickinson, Ellsworth, Lincoln, McPherson, Marion and 5 more	95 min
May 17, 10:24 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Barber, Barton, Butler, Chase and 28 more	2 hr
May 17, 11:38 PM CDT	Mesoscale Discussion	SPC	Bourbon, Chautauqua, Cherokee, Cowley, Crawford, Elk and 5 more	2 hr
May 18, 2:42 PM CDT	Severe Thunderstorm Watch	SPC	Greeley, Logan, Sherman, Wallace, Wichita	6 hr
May 18, 5:25 PM CDT	Mesoscale Discussion	SPC	Barber, Clark, Comanche, Finney, Ford, Grant and 8 more	2 hr
May 18, 5:51 PM CDT	Severe Thunderstorm Watch	SPC	Clark, Finney, Ford, Grant, Gray, Hamilton and 7 more	6 hr

Nearby

Mesoscale Discussions in Kansas, 2022 Mesoscale Discussions in Missouri, 2022 Every mesoscale discussion in 2022

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.