Alert archive / Iowa / Mesoscale Discussions in 2016

Mesoscale Discussion 1154

July 5, 20164 states

The Storm Prediction Center issued this mesoscale discussion at Jul 5, 2016, 8:38 PM CDT for 4 states. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued: Jul 5, 2016, 8:38 PM CDT (01:38 UTC)
Expired: Jul 5, 2016, 9:45 PM CDT
In force: 67 min
Issued by: the Storm Prediction Center
Chance of a watch: 95%

All 34 counties

Allamakee County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Cedar County, IA, Clayton County, IA, Clinton County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Jackson County, IA, Jones County, IA, Linn County, IA, Scott County, IA, Winneshiek County, IA, Carroll County, IL, Jo Daviess County, IL, Stephenson County, IL, Houston County, MN, Adams County, WI, Columbia County, WI, Crawford County, WI, Dane County, WI, Grant County, WI, Green County, WI, Iowa County, WI, Juneau County, WI, La Crosse County, WI, Lafayette County, WI, Marquette County, WI, Monroe County, WI, Richland County, WI, Sauk County, WI, Vernon County, WI

The radar

The La Crosse radar (KARX), 94 km from the middle of the area, began a volume at 01:41 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.

Severe Thunderstorm Watch 331Jul 5, 9:50 PM CDT

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.6 hours before the alert went out and 160 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: 1788 J/kg
Mixed-layer CIN: -111 J/kg
Mixed-layer LCL: 1054 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 140 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.7

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
Jul 5, 9:50 PM CDT	Severe Thunderstorm Watch	SPC	Boone, Carroll, DeKalb, Jo Daviess, Lee, Ogle and 4 more	7 hr
Jul 5, 10:46 PM CDT	Mesoscale Discussion	SPC	Boone, Carroll, Jo Daviess, Ogle, Stephenson, Winnebago	89 min
Jul 6, 1:27 AM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, Cook, DeKalb, DeWitt and 35 more	2 hr
Jul 6, 1:55 AM CDT	Severe Thunderstorm Watch	SPC	Bureau, Cass, Champaign, Cook, DeWitt, DuPage and 33 more	6 hr
Jul 6, 5:04 AM CDT	Mesoscale Discussion	SPC	Adams, Brown, Cass, Champaign, Christian, Clark and 41 more	116 min
Jul 6, 10:32 AM CDT	Mesoscale Discussion	SPC	Alexander, Pulaski, Union	58 min
Jul 6, 10:48 AM CDT	Severe Thunderstorm Watch	SPC	Alexander, Gallatin, Hardin, Jackson, Johnson, Massac and 5 more	5 hr
Jul 6, 12:53 PM CDT	Mesoscale Discussion	SPC	Alexander, Franklin, Gallatin, Hardin, Jackson, Johnson and 6 more	67 min
Jul 5, 7:38 PM CDT	Mesoscale Discussion	SPC	Clay, Dickinson, Emmet, O'Brien, Osceola, Winnebago	97 min
Jul 5, 8:10 PM CDT	Severe Thunderstorm Watch	SPC	Harrison, Monona, Pottawattamie, Shelby	5 hr
Jul 5, 10:15 PM CDT	Mesoscale Discussion	SPC	Audubon, Boone, Calhoun, Carroll, Crawford, Franklin and 13 more	90 min
Jul 5, 10:35 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Audubon, Boone, Calhoun, Carroll, Cass and 22 more	5 hr
Jul 5, 8:39 PM CDT	Mesoscale Discussion	SPC	Florence	3 hr

Nearby

Mesoscale Discussions in Iowa, 2016 Mesoscale Discussions in Wisconsin, 2016 Mesoscale Discussions in Illinois, 2016 Every mesoscale discussion in 2016

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.