Alert archive / Illinois / Mesoscale Discussions in 2019

Mesoscale Discussion 983

June 5, 20199 counties in Illinois; 6 counties in Iowa; Clark County, Scotland County, Missouri

The Storm Prediction Center issued this mesoscale discussion at Jun 5, 2019, 10:03 AM CDT for 9 counties in Illinois; 6 counties in Iowa; Clark County, Scotland County, Missouri. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued: Jun 5, 2019, 10:03 AM CDT (15:03 UTC)
Expired: Jun 5, 2019, 12:00 PM CDT
In force: 117 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Des Moines County, IA, Henry County, IA, Jefferson County, IA, Lee County, IA, Louisa County, IA, Van Buren County, IA, Fulton County, IL, Hancock County, IL, Henderson County, IL, Knox County, IL, McDonough County, IL, Mercer County, IL, Rock Island County, IL, Schuyler County, IL, Warren County, IL, Clark County, MO, Scotland County, MO

The radar

The Quad Cities radar (KDVN), 115 km from the middle of the area, began a volume at 15:03 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 12:00Z, 3.1 hours before the alert went out and 120 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: 1604 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 64 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 5, 12:44 PM CDT	Mesoscale Discussion	SPC	Adams, Bond, Brown, Calhoun, Cass, Champaign and 34 more	2 hr
Jun 5, 2:21 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Bond, Brown, Calhoun, Cass, Champaign and 38 more	7 hr
Jun 5, 2:44 PM CDT	Mesoscale Discussion	SPC	Franklin, Gallatin, Hamilton, Hardin, Jackson, Jefferson and 10 more	2 hr
Jun 5, 3:05 PM CDT	Severe Thunderstorm Watch	SPC	Edwards, Franklin, Gallatin, Hamilton, Jackson, Jefferson and 6 more	7 hr
Jun 5, 6:01 PM CDT	Mesoscale Discussion	SPC	Bond, Calhoun, Clinton, Jersey, Madison, Monroe and 2 more	89 min
Jun 4, 7:40 PM CDT	Mesoscale Discussion	SPC	Allamakee, Bremer, Buchanan, Butler, Cerro Gordo, Chickasaw and 14 more	2 hr
Jun 5, 5:21 PM CDT	Mesoscale Discussion	SPC	Buchanan, Caldwell, Carroll, Cass, Clay, Clinton and 8 more	54 min

Nearby

Mesoscale Discussions in Illinois, 2019 Mesoscale Discussions in Iowa, 2019 Mesoscale Discussions in Missouri, 2019 Every mesoscale discussion in 2019

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.