Alert archive / Iowa / Mesoscale Discussions in 2019
Mesoscale Discussion 1502
The Storm Prediction Center issued this mesoscale discussion at Jul 17, 2019, 12:59 PM CDT for 11 counties in Illinois; 34 counties in Iowa; 15 counties in Missouri. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 17, 2019, 12:59 PM CDT (17:59 UTC)
- Expired
- Jul 17, 2019, 3:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 60 counties
Appanoose County, IA, Benton County, IA, Black Hawk County, IA, Buchanan County, IA, Cedar County, IA, Clarke County, IA, Davis County, IA, Decatur County, IA, Des Moines County, IA, Henry County, IA, Iowa County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Lucas County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Muscatine County, IA, Poweshiek County, IA, Ringgold County, IA, Scott County, IA, Tama County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Adams County, IL, Brown County, IL, Hancock County, IL, Henderson County, IL, Knox County, IL, McDonough County, IL, Mercer County, IL, Pike County, IL, Rock Island County, IL, Schuyler County, IL, Warren County, IL, Adair County, MO, Clark County, MO, Grundy County, MO, Harrison County, MO, Knox County, MO, Lewis County, MO, Macon County, MO, Marion County, MO, Mercer County, MO, Putnam County, MO, Ralls County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO
The radar
The Quad Cities radar (KDVN), 123 km from the middle of the area, began a volume at 17:59 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 12:00Z, 6.0 hours before the alert went out and 130 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
- 255 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 1225 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 24 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Jul 17, 2:27 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Calhoun, Cass, Fulton, Greene and 14 more | 4 hr |
| Jul 17, 3:58 PM CDT | Mesoscale Discussion | SPC | Adams, Bond, Brown, Calhoun, Cass, Christian and 17 more | 92 min |
| Jul 17, 5:17 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Bond, Clinton, Fayette, Franklin, Gallatin and 20 more | 4 hr |
| Jul 17, 6:17 PM CDT | Mesoscale Discussion | SPC | Alexander, Bond, Clay, Clinton, Fayette, Franklin and 22 more | 88 min |
| Jul 17, 4:14 AM CDT | Mesoscale Discussion | SPC | Buena Vista, Cherokee, Clay, Ida, Lyon, Monona and 6 more | 91 min |
| Jul 17, 4:48 AM CDT | Severe Thunderstorm Watch | SPC | Audubon, Buena Vista, Calhoun, Carroll, Cherokee, Clay and 21 more | 5 hr |
| Jul 17, 9:09 AM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Benton, Black Hawk, Boone and 72 more | 96 min |
| Jul 17, 10:38 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Appanoose, Audubon, Benton, Black Hawk, Buchanan and 40 more | 6 hr |
Nearby
Mesoscale Discussions in Iowa, 2019Mesoscale Discussions in Missouri, 2019Mesoscale Discussions in Illinois, 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.