Alert archive / Kansas / Mesoscale Discussions in 2013

Mesoscale Discussion 820

May 27, 201315 counties in Kansas; 5 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at May 27, 2013, 3:23 PM CDT for 15 counties in Kansas; 5 counties in Nebraska. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued: May 27, 2013, 3:23 PM CDT (20:23 UTC)
Expired: May 27, 2013, 4:30 PM CDT
In force: 67 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

Counties Cloud County, KS, Decatur County, KS, Ellis County, KS, Graham County, KS, Jewell County, KS, Lincoln County, KS, Mitchell County, KS, Norton County, KS, Osborne County, KS, Phillips County, KS, Republic County, KS, Rooks County, KS, Russell County, KS, Sheridan County, KS, Smith County, KS, Franklin County, NE, Furnas County, NE, Harlan County, NE, Nuckolls County, NE, Webster County, NE

The radar

The Grand Island radar (KUEX), 122 km from the middle of the area, began a volume at 20:26 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.

Tornado Watch 231May 27, 4:50 PM CDT

The nearest sounding before it

Dodge City, (KDDC), launched 12:00Z, 8.4 hours before the alert went out and 194 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: 1447 J/kg
Mixed-layer CIN: -390 J/kg
Mixed-layer LCL: 1652 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 194 m²/s²
0-3 km storm-relative helicity: 232 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
May 27, 1:40 AM CDT	Mesoscale Discussion	SPC	Brown, Doniphan	95 min
May 27, 3:33 AM CDT	Severe Thunderstorm Watch	SPC	Atchison, Brown, Doniphan, Jackson, Nemaha	5 hr
May 27, 6:20 AM CDT	Mesoscale Discussion	SPC	Atchison, Brown, Doniphan, Jackson, Nemaha	85 min
May 27, 2:00 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Decatur, Gove, Logan, Norton, Rawlins and 4 more	60 min
May 27, 2:19 PM CDT	Severe Thunderstorm Watch	SPC	Cheyenne, Gove, Greeley, Logan, Rawlins, Sherman and 3 more	6 hr
May 27, 4:49 PM CDT	Tornado Watch	SPC	Clay, Cloud, Decatur, Dickinson, Ellis, Ellsworth and 20 more	7 hr
May 27, 5:36 PM CDT	Mesoscale Discussion	SPC	Barber, Barton, Butler, Chase, Comanche, Cowley and 19 more	84 min
May 27, 5:41 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Greeley, Logan, Scott, Sherman, Thomas and 2 more	94 min
May 27, 6:53 PM CDT	Mesoscale Discussion	SPC	Clay, Cloud, Decatur, Dickinson, Ellis, Geary and 17 more	2 hr
May 26, 7:33 PM CDT	Tornado Watch	SPC	Antelope, Blaine, Boone, Brown, Buffalo, Custer and 18 more	4 hr
May 26, 9:07 PM CDT	Mesoscale Discussion	SPC	Antelope, Blaine, Boone, Brown, Butler, Cedar and 24 more	83 min
May 26, 11:03 PM CDT	Severe Thunderstorm Watch	SPC	Antelope, Blaine, Boone, Burt, Butler, Cass and 37 more	6 hr

Nearby

Mesoscale Discussions in Kansas, 2013 Mesoscale Discussions in Nebraska, 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.