Alert archive / Iowa / Mesoscale Discussions in 2009

Mesoscale Discussion 984

June 8, 200928 counties in Iowa; Doniphan County, Kansas; 17 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2009, 2:30 AM CDT for 28 counties in Iowa; Doniphan County, Kansas; 17 counties in Missouri. It was in force for 60 min.

The area

The outline as issued.

The facts

Issued
Jun 8, 2009, 2:30 AM CDT (07:30 UTC)
Expired
Jun 8, 2009, 3:30 AM CDT
In force
60 min
Issued by
the Storm Prediction Center
All 46 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Cass County, IA, Clarke County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Fremont County, IA, Jasper County, IA, Keokuk County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Mills County, IA, Monroe County, IA, Montgomery County, IA, Page County, IA, Polk County, IA, Pottawattamie County, IA, Poweshiek County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Doniphan County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Caldwell County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Livingston County, MO, Mercer County, MO, Nodaway County, MO, Putnam County, MO, Sullivan County, MO, Worth County, MO

The radar

The Des Moines radar (KDMX), 134 km from the middle of the area, began a volume at 07:34 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

Omaha, NE (KOAX), launched 00:00Z, 7.5 hours before the alert went out and 220 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, Omaha, NE at 00:00Z on 2009-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1712 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, Omaha, NE at 00:00Z on 2009-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 246 square meters per square second.1939587897Sfc1 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
1712 J/kg
Mixed-layer CIN
-173 J/kg
Mixed-layer LCL
750 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
246 m²/s²
0-3 km storm-relative helicity
272 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.6

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 7, 8:49 PM CDTMesoscale DiscussionSPCAppanoose, Benton, Buchanan, Cedar, Davis, Henry and 18 more56 min
Jun 7, 10:22 PM CDTMesoscale DiscussionSPCAdair, Adams, Cass, Dallas, Fremont, Madison and 7 more53 min
Jun 7, 10:53 PM CDTTornado WatchSPCAdair, Adams, Cass, Clarke, Dallas, Decatur and 15 more5 hr
Jun 7, 11:09 PM CDTSevere Thunderstorm WatchSPCDes Moines, Henry, Jefferson, Lee, Louisa, Van Buren6 hr
Jun 8, 3:25 AM CDTMesoscale DiscussionSPCDes Moines, Henry, Jefferson, Lee, Louisa, Van Buren65 min
Jun 7, 7:08 PM CDTMesoscale DiscussionSPCAnderson, Barber, Butler, Chase, Coffey, Greenwood and 7 more67 min
Jun 7, 8:13 PM CDTMesoscale DiscussionSPCGraham, Jewell, Mitchell, Norton, Osborne, Phillips and 3 more62 min
Jun 7, 11:31 PM CDTSevere Thunderstorm WatchSPCAllen, Bourbon, Butler, Chase, Chautauqua, Cherokee and 14 more5 hr
Jun 8, 12:34 AM CDTSevere Thunderstorm WatchSPCJewell, Mitchell, Osborne, Phillips, Rooks, Smith1 min
Jun 8, 3:20 PM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Carter, Christian, Crawford and 26 more85 min
Jun 8, 4:33 PM CDTSevere Thunderstorm WatchSPCBollinger, Butler, Cape Girardeau, Carter, Crawford, Dent and 20 more5 hr

Nearby

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