Alert archive / Kansas / Mesoscale Discussions in 2009

Mesoscale Discussion 965

June 6, 20096 counties in Iowa; 29 counties in Kansas; 14 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2009, 11:04 PM CDT for 6 counties in Iowa; 29 counties in Kansas; 14 counties in Nebraska. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jun 6, 2009, 11:04 PM CDT (04:04 UTC)
Expired: Jun 7, 2009, 12:30 AM CDT
In force: 86 min
Issued by: the Storm Prediction Center

All 49 counties

Adams County, IA, Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Taylor County, IA, Barton County, KS, Brown County, KS, Clay County, KS, Cloud County, KS, Dickinson County, KS, Ellsworth County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Jewell County, KS, Lincoln County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Mitchell County, KS, Morris County, KS, Nemaha County, KS, Osborne County, KS, Ottawa County, KS, Pottawatomie County, KS, Republic County, KS, Rice County, KS, Riley County, KS, Russell County, KS, Saline County, KS, Shawnee County, KS, Smith County, KS, Wabaunsee County, KS, Washington County, KS, Cass County, NE, Clay County, NE, Fillmore County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Saline County, NE, Thayer County, NE

The radar

The Topeka radar (KTWX), 66 km from the middle of the area, began a volume at 04:05 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 340Jun 6, 11:20 PM CDT

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 4.1 hours before the alert went out and 95 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: 1774 J/kg
Mixed-layer CIN: -156 J/kg
Mixed-layer LCL: 1716 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 168 m²/s²
0-3 km storm-relative helicity: 240 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 4.3

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
Jun 6, 9:01 PM CDT	Severe Thunderstorm Watch	SPC	Fremont, Mills, Montgomery, Page	6 hr
Jun 6, 11:16 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Adams, Appanoose, Audubon, Boone, Carroll and 24 more	6 hr
Jun 7, 12:44 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Audubon, Boone, Carroll and 36 more	61 min
Jun 7, 4:45 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Cass, Cedar, Clarke and 31 more	30 min
Jun 7, 11:16 AM CDT	Mesoscale Discussion	SPC	Buena Vista, Calhoun, Carroll, Cerro Gordo, Cherokee, Clay and 24 more	119 min
Jun 7, 2:36 PM CDT	Mesoscale Discussion	SPC	Fremont, Mills, Montgomery, Page, Taylor	114 min
Jun 7, 3:45 PM CDT	Tornado Watch	SPC	Adair, Adams, Audubon, Cass, Clarke, Dallas and 12 more	7 hr
Jun 7, 5:21 PM CDT	Mesoscale Discussion	SPC	Boone, Bremer, Buena Vista, Butler, Calhoun, Carroll and 25 more	54 min
Jun 7, 5:31 PM CDT	Mesoscale Discussion	SPC	Appanoose, Davis, Henry, Iowa, Jefferson, Keokuk and 10 more	59 min
Jun 7, 5:44 PM CDT	Tornado Watch	SPC	Appanoose, Boone, Davis, Jasper, Lucas, Mahaska and 10 more	6 hr
Jun 7, 3:30 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Sherman, Thomas, Wallace	60 min
Jun 7, 4:13 PM CDT	Mesoscale Discussion	SPC	Barber, Barton, Comanche, Edwards, Ellsworth, Harper and 10 more	62 min
Jun 7, 5:07 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Barber, Barton, Butler, Chase and 39 more	7 hr
Jun 7, 5:31 PM CDT	Severe Thunderstorm Watch	SPC	Cheyenne, Decatur, Gove, Graham, Greeley, Logan and 7 more	5 hr
Jun 6, 9:28 PM CDT	Mesoscale Discussion	SPC	Adams, Arthur, Blaine, Brown, Buffalo, Chase and 32 more	92 min
Jun 7, 1:35 AM CDT	Mesoscale Discussion	SPC	Arthur, Chase, Cheyenne, Deuel, Dundy, Garden and 8 more	55 min
Jun 7, 2:31 PM CDT	Mesoscale Discussion	SPC	Banner, Cheyenne, Deuel, Garden, Kimball, Morrill	59 min

Nearby

Mesoscale Discussions in Kansas, 2009 Mesoscale Discussions in Nebraska, 2009 Mesoscale Discussions in Iowa, 2009 Every mesoscale discussion in 2009

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.