Alert archive / Kansas / Mesoscale Discussions in 2017

Mesoscale Discussion 868

May 27, 20177 counties in Kansas

The Storm Prediction Center issued this mesoscale discussion at May 27, 2017, 2:46 PM CDT for 7 counties in Kansas. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued: May 27, 2017, 2:46 PM CDT (19:46 UTC)
Expired: May 27, 2017, 3:45 PM CDT
In force: 59 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Allen County, KS, Anderson County, KS, Bourbon County, KS, Coffey County, KS, Greenwood County, KS, Neosho County, KS, Woodson County, KS

The radar

The Topeka radar (KTWX), 113 km from the middle of the area, began a volume at 19:49 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

Springfield, MO (KSGF), launched 12:00Z, 7.8 hours before the alert went out and 221 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: 3187 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 766 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 138 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 9.6

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 26, 7:38 PM CDT	Severe Thunderstorm Watch	SPC	Cheyenne, Decatur, Finney, Gove, Graham, Greeley and 12 more	7 hr
May 26, 10:03 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Gove, Lane, Logan, Rawlins, Scott and 5 more	117 min
May 26, 11:45 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Ellis, Gove, Graham, Logan and 12 more	2 hr
May 27, 12:52 AM CDT	Severe Thunderstorm Watch	SPC	Barton, Ellis, Ellsworth, Jewell, Lincoln, Mitchell and 8 more	5 hr
May 27, 1:47 AM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Gove, Graham, Greeley, Lane and 10 more	88 min
May 27, 3:35 AM CDT	Mesoscale Discussion	SPC	Barton, Clay, Cloud, Dickinson, Ellis, Ellsworth and 21 more	115 min
May 27, 9:59 AM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 20 more	2 hr
May 27, 12:13 PM CDT	Tornado Watch	SPC	Bourbon, Cherokee, Crawford, Johnson, Linn, Miami	7 hr
May 27, 1:12 PM CDT	Mesoscale Discussion	SPC	Bourbon, Cherokee, Crawford, Linn, Miami, Neosho	93 min
May 27, 2:45 PM CDT	Mesoscale Discussion	SPC	Grant, Hamilton, Haskell, Kearny, Morton, Seward and 2 more	2 hr
May 27, 5:27 PM CDT	Severe Thunderstorm Watch	SPC	Grant, Hamilton, Haskell, Kearny, Morton, Seward and 2 more	6 hr

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.