Alert archive / Missouri / Mesoscale Discussions in 2017

Mesoscale Discussion 1179

June 28, 2017Decatur County, Ringgold County, Taylor County, Iowa; 14 counties in Missouri

The Storm Prediction Center issued this mesoscale discussion at Jun 28, 2017, 8:39 PM CDT for Decatur County, Ringgold County, Taylor County, Iowa; 14 counties in Missouri. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Jun 28, 2017, 8:39 PM CDT (01:39 UTC)
Expired: Jun 28, 2017, 10:15 PM CDT
In force: 96 min
Issued by: the Storm Prediction Center

Counties Decatur County, IA, Ringgold County, IA, Taylor County, IA, Adair County, MO, Atchison County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Knox County, MO, Mercer County, MO, Nodaway County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Sullivan County, MO, Worth County, MO

The radar

The Des Moines radar (KDMX), 154 km from the middle of the area, began a volume at 01:38 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 00:00Z, 1.7 hours before the alert went out and 200 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: 2166 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 1454 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 377 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 22.7

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
Jun 28, 7:53 PM CDT	Mesoscale Discussion	SPC	Clinton, Dubuque, Jackson, Jones, Linn	97 min
Jun 29, 2:26 PM CDT	Mesoscale Discussion	SPC	Plymouth	94 min
Jun 29, 3:42 PM CDT	Severe Thunderstorm Watch	SPC	Audubon, Buena Vista, Calhoun, Carroll, Cass, Cherokee and 18 more	8 hr
Jun 29, 3:48 PM CDT	Mesoscale Discussion	SPC	Black Hawk, Bremer, Buchanan, Butler, Clayton, Delaware and 7 more	117 min
Jun 29, 6:08 PM CDT	Mesoscale Discussion	SPC	Audubon, Buena Vista, Carroll, Cass, Cherokee, Clay and 13 more	67 min
Jun 29, 1:45 PM CDT	Mesoscale Discussion	SPC	Audrain, Callaway, Camden, Cole, Crawford, Franklin and 17 more	2 hr
Jun 29, 3:12 PM CDT	Mesoscale Discussion	SPC	Bates, Cass, Vernon	3 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.