Alert archive / Iowa / Mesoscale Discussions in 2017

Mesoscale Discussion 1063

June 16, 20174 states

The Storm Prediction Center issued this mesoscale discussion at Jun 16, 2017, 6:56 PM CDT for 4 states. It was in force for 64 min.

The area

The outline as issued.

The facts

Issued: Jun 16, 2017, 6:56 PM CDT (23:56 UTC)
Expired: Jun 16, 2017, 8:00 PM CDT
In force: 64 min
Issued by: the Storm Prediction Center

All 56 counties

Allamakee County, IA, Benton County, IA, Black Hawk County, IA, Boone County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cedar County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clayton County, IA, Clinton County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Greene County, IA, Grundy County, IA, Hamilton County, IA, Hardin County, IA, Howard County, IA, Humboldt County, IA, Ida County, IA, Jackson County, IA, Jones County, IA, Linn County, IA, Marshall County, IA, Pocahontas County, IA, Sac County, IA, Story County, IA, Tama County, IA, Webster County, IA, Winneshiek County, IA, Wright County, IA, Carroll County, IL, Jo Daviess County, IL, Stephenson County, IL, Houston County, MN, Adams County, WI, Crawford County, WI, Grant County, WI, Green County, WI, Iowa County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Lafayette County, WI, Monroe County, WI, Richland County, WI, Sauk County, WI, Trempealeau County, WI, Vernon County, WI, Wood County, WI

The radar

The La Crosse radar (KARX), 133 km from the middle of the area, began a volume at 23:54 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

Minneapolis, MN (KMPX), launched 12:00Z, 11.9 hours before the alert went out and 222 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: 10 J/kg
Mixed-layer CIN: -161 J/kg
Mixed-layer LCL: 2409 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 196 m²/s²
0-3 km storm-relative helicity: 217 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 16, 12:45 PM CDT	Mesoscale Discussion	SPC	Alexander, Jackson, Johnson, Massac, Perry, Pulaski and 3 more	3 hr
Jun 15, 9:33 PM CDT	Mesoscale Discussion	SPC	Adair, Adams, Benton, Black Hawk, Buchanan, Cedar and 32 more	57 min
Jun 16, 3:29 PM CDT	Mesoscale Discussion	SPC	Allamakee, Bremer, Buena Vista, Butler, Cerro Gordo, Cherokee and 21 more	91 min
Jun 16, 3:30 PM CDT	Severe Thunderstorm Watch	SPC	Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more	8 hr
Jun 16, 3:53 PM CDT	Severe Thunderstorm Watch	SPC	Allamakee, Black Hawk, Bremer, Buena Vista, Butler, Calhoun and 33 more	7 hr
Jun 16, 6:16 PM CDT	Mesoscale Discussion	SPC	Adams, Cass, Fremont, Harrison, Mills, Monona and 5 more	119 min
Jun 16, 2:25 PM CDT	Mesoscale Discussion	SPC	Brown, Calumet, Door, Florence, Fond du Lac, Forest and 19 more	2 hr

Nearby

Mesoscale Discussions in Iowa, 2017 Mesoscale Discussions in Wisconsin, 2017 Mesoscale Discussions in Illinois, 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.