Alert archive / Missouri / Mesoscale Discussions in 2017

Mesoscale Discussion 1282

July 10, 20175 counties in Iowa; 13 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jul 10, 2017, 6:34 PM CDT for 5 counties in Iowa; 13 counties in Missouri. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jul 10, 2017, 6:34 PM CDT (23:34 UTC)
Expired: Jul 10, 2017, 8:00 PM CDT
In force: 86 min
Issued by: the Storm Prediction Center
Chance of a watch: 5%

Counties Appanoose County, IA, Davis County, IA, Decatur County, IA, Van Buren County, IA, Wayne County, IA, Adair County, MO, Clark County, MO, Daviess County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Knox County, MO, Mercer County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Sullivan County, MO, Worth County, MO

The radar

The Des Moines radar (KDMX), 150 km from the middle of the area, began a volume at 23:35 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

Topeka, KS (KFOE), launched 12:00Z, 11.6 hours before the alert went out and 253 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: 1502 J/kg
Mixed-layer CIN: -313 J/kg
Mixed-layer LCL: 1313 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 9, 9:10 PM CDT	Mesoscale Discussion	SPC	Allamakee, Bremer, Butler, Cerro Gordo, Chickasaw, Clayton and 16 more	65 min
Jul 9, 9:40 PM CDT	Severe Thunderstorm Watch	SPC	Allamakee, Black Hawk, Bremer, Butler, Cerro Gordo, Chickasaw and 22 more	5 hr
Jul 9, 11:45 PM CDT	Mesoscale Discussion	SPC	Allamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 23 more	60 min
Jul 10, 1:49 AM CDT	Mesoscale Discussion	SPC	Benton, Buchanan, Cedar, Clinton, Davis, Delaware and 26 more	116 min
Jul 10, 2:43 AM CDT	Mesoscale Discussion	SPC	Butler, Franklin, Grundy, Hamilton, Hardin, Jasper and 7 more	2 hr

Nearby

Mesoscale Discussions in Missouri, 2017 Mesoscale Discussions in Iowa, 2017 Every mesoscale discussion in 2017

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.