Alert archive / Illinois / Mesoscale Discussions in 2015
Mesoscale Discussion 747
The Storm Prediction Center issued this mesoscale discussion at May 24, 2015, 6:41 PM CDT for 28 counties in Illinois; 9 counties in Iowa. It was in force for 94 min.
The area
The outline as issued.
The facts
- Issued
- May 24, 2015, 6:41 PM CDT (23:41 UTC)
- Expired
- May 24, 2015, 8:15 PM CDT
- In force
- 94 min
- Issued by
- the Storm Prediction Center
All 37 counties
Cedar County, IA, Clinton County, IA, Des Moines County, IA, Henry County, IA, Jackson County, IA, Lee County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Bureau County, IL, Carroll County, IL, Cass County, IL, Fulton County, IL, Grundy County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Kendall County, IL, Knox County, IL, LaSalle County, IL, Lee County, IL, Marshall County, IL, Mason County, IL, McDonough County, IL, Menard County, IL, Mercer County, IL, Morgan County, IL, Ogle County, IL, Peoria County, IL, Putnam County, IL, Rock Island County, IL, Schuyler County, IL, Stark County, IL, Tazewell County, IL, Warren County, IL, Whiteside County, IL, Woodford County, IL
The radar
The Quad Cities radar (KDVN), 56 km from the middle of the area, began a volume at 23:43 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, 11.7 hours before the alert went out and 56 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1494 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 175 m²/s²
- 0-3 km storm-relative helicity
- 206 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 3:34 PM CDT | Mesoscale Discussion | SPC | Bureau, Carroll, Fulton, Hancock, Henderson, Henry and 17 more | 56 min |
| May 24, 4:14 PM CDT | Tornado Watch | SPC | Adams, Alexander, Bond, Brown, Calhoun, Clinton and 16 more | 8 hr |
| May 24, 5:34 PM CDT | Tornado Watch | SPC | Boone, Bureau, Carroll, Cass, Christian, DeKalb and 36 more | 7 hr |
| May 24, 6:04 PM CDT | Mesoscale Discussion | SPC | Alexander, Calhoun, Greene, Jackson, Jersey, Madison and 6 more | 116 min |
Nearby
Mesoscale Discussions in Illinois, 2015Mesoscale Discussions in Iowa, 2015Every mesoscale discussion in 2015
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.