Alert archive / Kansas / Mesoscale Discussions in 2009

Mesoscale Discussion 983

June 7, 20094 states

The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2009, 10:22 PM CDT for 4 states. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Jun 7, 2009, 10:22 PM CDT (03:22 UTC)
Expired: Jun 7, 2009, 11:15 PM CDT
In force: 53 min
Issued by: the Storm Prediction Center

All 53 counties

Adair County, IA, Adams County, IA, Cass County, IA, Dallas County, IA, Fremont County, IA, Madison County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Atchison County, KS, Brown County, KS, Doniphan County, KS, Douglas County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Leavenworth County, KS, Marshall County, KS, Morris County, KS, Nemaha County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Caldwell County, MO, Clay County, MO, Clinton County, MO, DeKalb County, MO, Gentry County, MO, Harrison County, MO, Holt County, MO, Nodaway County, MO, Platte County, MO, Ray County, MO, Worth County, MO, Cass County, NE, Douglas County, NE, Gage County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Sarpy County, NE

The radar

The Topeka radar (KTWX), 99 km from the middle of the area, began a volume at 03:24 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.

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 3.4 hours before the alert went out and 92 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: 3425 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 1586 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 156 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.2

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 7, 8:49 PM CDT	Mesoscale Discussion	SPC	Appanoose, Benton, Buchanan, Cedar, Davis, Henry and 18 more	56 min
Jun 7, 10:53 PM CDT	Tornado Watch	SPC	Adair, Adams, Cass, Clarke, Dallas, Decatur and 15 more	5 hr
Jun 7, 11:09 PM CDT	Severe Thunderstorm Watch	SPC	Des Moines, Henry, Jefferson, Lee, Louisa, Van Buren	6 hr
Jun 8, 2:30 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Cass, Clarke, Dallas and 22 more	60 min
Jun 8, 3:25 AM CDT	Mesoscale Discussion	SPC	Des Moines, Henry, Jefferson, Lee, Louisa, Van Buren	65 min
Jun 7, 7:08 PM CDT	Mesoscale Discussion	SPC	Anderson, Barber, Butler, Chase, Coffey, Greenwood and 7 more	67 min
Jun 7, 8:13 PM CDT	Mesoscale Discussion	SPC	Graham, Jewell, Mitchell, Norton, Osborne, Phillips and 3 more	62 min
Jun 7, 11:31 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Bourbon, Butler, Chase, Chautauqua, Cherokee and 14 more	5 hr
Jun 8, 12:34 AM CDT	Severe Thunderstorm Watch	SPC	Jewell, Mitchell, Osborne, Phillips, Rooks, Smith	1 min
Jun 8, 3:20 PM CDT	Mesoscale Discussion	SPC	Bollinger, Butler, Cape Girardeau, Carter, Christian, Crawford and 26 more	85 min
Jun 8, 4:33 PM CDT	Severe Thunderstorm Watch	SPC	Bollinger, Butler, Cape Girardeau, Carter, Crawford, Dent and 20 more	5 hr

Nearby

Mesoscale Discussions in Kansas, 2009 Mesoscale Discussions in Missouri, 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.