Alert archive / Iowa / Mesoscale Discussions in 2019
Mesoscale Discussion 643
The Storm Prediction Center issued this mesoscale discussion at May 16, 2019, 7:14 PM CDT for 18 counties in Illinois; 23 counties in Iowa; Lafayette County, Wisconsin. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 16, 2019, 7:14 PM CDT (00:14 UTC)
- Expired
- May 16, 2019, 9:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 42 counties
Benton County, IA, Cedar County, IA, Clarke County, IA, Clinton County, IA, Dubuque County, IA, Iowa County, IA, Jackson County, IA, Jasper County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Linn County, IA, Louisa County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Muscatine County, IA, Poweshiek County, IA, Scott County, IA, Warren County, IA, Washington County, IA, Bureau County, IL, Carroll County, IL, DeKalb County, IL, Ford County, IL, Grundy County, IL, Henry County, IL, Jo Daviess County, IL, Kendall County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, Mercer County, IL, Ogle County, IL, Putnam County, IL, Rock Island County, IL, Stephenson County, IL, Whiteside County, IL, Winnebago County, IL, Lafayette County, WI
The radar
The Quad Cities radar (KDVN), 18 km from the middle of the area, began a volume at 00:16 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
Davenport, (KDVN), launched 00:00Z, 0.2 hours before the alert went out and 25 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.
- Mixed-layer CAPE
- 2335 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 1972 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 64 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.8
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 7:57 PM CDT | Severe Thunderstorm Watch | SPC | Bureau, Carroll, Cook, DeKalb, DuPage, Ford and 18 more | 6 hr |
| May 16, 11:12 PM CDT | Mesoscale Discussion | SPC | Bureau, Carroll, DeKalb, Ford, Grundy, Henry and 14 more | 2 hr |
Nearby
Mesoscale Discussions in Iowa, 2019Mesoscale Discussions in Illinois, 2019Mesoscale Discussions in Wisconsin, 2019Every 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.