Alert archive / Kansas / Mesoscale Discussions in 2009

Mesoscale Discussion 974

June 7, 20094 states

The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2009, 2:36 PM CDT for 4 states. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued
Jun 7, 2009, 2:36 PM CDT (19:36 UTC)
Expired
Jun 7, 2009, 4:30 PM CDT
In force
114 min
Issued by
the Storm Prediction Center
All 35 counties

Fremont County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Taylor County, IA, Atchison County, KS, Brown County, KS, Doniphan County, KS, Douglas County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Leavenworth County, KS, Lyon County, KS, Marshall County, KS, Morris County, KS, Nemaha County, KS, Osage County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Holt County, MO, Nodaway County, MO, Cass County, NE, Gage County, NE, Johnson County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE

The radar

The Topeka radar (KTWX), 79 km from the middle of the area, began a volume at 19:37 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 12:00Z, 7.6 hours before the alert went out and 74 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-pSkew-T log-p diagram, Topeka, KS at 12:00Z on 2009-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1088 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Topeka, KS at 12:00Z on 2009-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 276 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1088 J/kg
Mixed-layer CIN
-394 J/kg
Mixed-layer LCL
689 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
276 m²/s²
0-3 km storm-relative helicity
191 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.

IssuedProductOfficeCountiesLasted
Jun 6, 9:01 PM CDTSevere Thunderstorm WatchSPCFremont, Mills, Montgomery, Page6 hr
Jun 6, 11:04 PM CDTMesoscale DiscussionSPCAdams, Fremont, Mills, Montgomery, Page, Taylor86 min
Jun 6, 11:16 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Appanoose, Audubon, Boone, Carroll and 24 more6 hr
Jun 7, 12:44 AM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Audubon, Boone, Carroll and 36 more61 min
Jun 7, 4:45 AM CDTMesoscale DiscussionSPCAdair, Adams, Appanoose, Cass, Cedar, Clarke and 31 more30 min
Jun 7, 11:16 AM CDTMesoscale DiscussionSPCBuena Vista, Calhoun, Carroll, Cerro Gordo, Cherokee, Clay and 24 more119 min
Jun 7, 3:45 PM CDTTornado WatchSPCAdair, Adams, Audubon, Cass, Clarke, Dallas and 12 more7 hr
Jun 7, 5:21 PM CDTMesoscale DiscussionSPCBoone, Bremer, Buena Vista, Butler, Calhoun, Carroll and 25 more54 min
Jun 7, 5:31 PM CDTMesoscale DiscussionSPCAppanoose, Davis, Henry, Iowa, Jefferson, Keokuk and 10 more59 min
Jun 7, 5:44 PM CDTTornado WatchSPCAppanoose, Boone, Davis, Jasper, Lucas, Mahaska and 10 more6 hr
Jun 7, 3:30 PM CDTMesoscale DiscussionSPCCheyenne, Sherman, Thomas, Wallace60 min
Jun 7, 4:13 PM CDTMesoscale DiscussionSPCBarber, Barton, Comanche, Edwards, Ellsworth, Harper and 10 more62 min
Jun 7, 5:07 PM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Barber, Barton, Butler, Chase and 39 more7 hr
Jun 7, 5:31 PM CDTSevere Thunderstorm WatchSPCCheyenne, Decatur, Gove, Graham, Greeley, Logan and 7 more5 hr
Jun 7, 12:18 PM CDTMesoscale DiscussionSPCAudrain, Benton, Boone, Callaway, Camden, Chariton and 26 more57 min
Jun 6, 9:28 PM CDTMesoscale DiscussionSPCAdams, Arthur, Blaine, Brown, Buffalo, Chase and 32 more92 min
Jun 7, 1:35 AM CDTMesoscale DiscussionSPCArthur, Chase, Cheyenne, Deuel, Dundy, Garden and 8 more55 min
Jun 7, 2:31 PM CDTMesoscale DiscussionSPCBanner, Cheyenne, Deuel, Garden, Kimball, Morrill59 min

Nearby

Mesoscale Discussions in Kansas, 2009Mesoscale Discussions in Nebraska, 2009Mesoscale Discussions in Iowa, 2009Every 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.