Alert archive / Iowa / Mesoscale Discussions in 2011

Mesoscale Discussion 1166

June 9, 201139 counties in Iowa; 23 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jun 9, 2011, 11:45 PM CDT for 39 counties in Iowa; 23 counties in Missouri. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Jun 9, 2011, 11:45 PM CDT (04:45 UTC)
Expired: Jun 10, 2011, 1:15 AM CDT
In force: 90 min
Issued by: the Storm Prediction Center

All 62 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Boone County, IA, Carroll County, IA, Cass County, IA, Clarke County, IA, Crawford County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Fremont County, IA, Greene County, IA, Guthrie County, IA, Harrison County, IA, Jasper County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall 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, Shelby County, IA, Story County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Wayne County, IA, Adair County, MO, Andrew County, MO, Atchison County, MO, Clark County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Knox County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Mercer County, MO, Nodaway County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO, Worth County, MO

The radar

The Des Moines radar (KDMX), 125 km from the middle of the area, began a volume at 04:45 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

Davenport, (KDVN), launched 00:00Z, 4.8 hours before the alert went out and 262 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 696 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 63 m²/s²
0-3 km storm-relative helicity: 147 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
Jun 9, 7:43 PM CDT	Mesoscale Discussion	SPC	Appanoose, Decatur, Fremont, Page, Ringgold, Taylor and 1 more	92 min
Jun 9, 9:48 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Adams, Appanoose, Audubon, Boone, Carroll and 33 more	6 hr
Jun 10, 1:39 AM CDT	Mesoscale Discussion	SPC	Adair, Adams, Appanoose, Audubon, Boone, Carroll and 36 more	2 hr
Jun 10, 4:18 PM CDT	Mesoscale Discussion	SPC	Audrain, Barton, Bates, Benton, Boone, Caldwell and 45 more	87 min
Jun 10, 4:57 PM CDT	Severe Thunderstorm Watch	SPC	Audrain, Barry, Barton, Bates, Benton, Boone and 54 more	7 hr

Nearby

Mesoscale Discussions in Iowa, 2011 Mesoscale Discussions in Missouri, 2011 Every mesoscale discussion in 2011

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.