Alert archive / Iowa / Mesoscale Discussions in 2020
Mesoscale Discussion 251
The Storm Prediction Center issued this mesoscale discussion at Mar 28, 2020, 1:33 PM CDT for Adams County, Hancock County, Henderson County, Illinois; 25 counties in Iowa; 24 counties in Missouri. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- Mar 28, 2020, 1:33 PM CDT (18:33 UTC)
- Expired
- Mar 28, 2020, 3:30 PM CDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 52 counties
Appanoose County, IA, Clarke County, IA, Davis County, IA, Decatur County, IA, Des Moines County, IA, Henry County, IA, Iowa County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Lee 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, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Adams County, IL, Hancock County, IL, Henderson County, IL, Adair County, MO, Audrain County, MO, Boone County, MO, Callaway County, MO, Chariton County, MO, Clark County, MO, Cooper County, MO, Howard County, MO, Knox County, MO, Lewis County, MO, Linn County, MO, Macon County, MO, Marion County, MO, Mercer County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Putnam County, MO, Ralls County, MO, Randolph County, MO, Schuyler County, MO, Scotland County, MO, Shelby County, MO, Sullivan County, MO
The radar
The Des Moines radar (KDMX), 165 km from the middle of the area, began a volume at 18:33 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, 6.6 hours before the alert went out and 226 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
- 695 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- -128 m²/s²
- 0-3 km storm-relative helicity
- 164 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 |
|---|---|---|---|---|
| Mar 27, 8:02 PM CDT | Mesoscale Discussion | SPC | Edwards, Franklin, Hamilton, Jackson, Jefferson, Lawrence and 10 more | 88 min |
| Mar 27, 8:33 PM CDT | Mesoscale Discussion | SPC | Calhoun | 87 min |
| Mar 27, 10:16 PM CDT | Severe Thunderstorm Watch | SPC | Bond, Calhoun, Christian, Effingham, Fayette, Greene and 9 more | 6 hr |
| Mar 27, 11:46 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Christian, Fayette, Greene, Jersey and 8 more | 89 min |
| Mar 28, 1:34 AM CDT | Mesoscale Discussion | SPC | Carroll, Henry, Jo Daviess, Mercer, Rock Island, Whiteside | 56 min |
| Mar 28, 10:18 AM CDT | Mesoscale Discussion | SPC | Champaign, Christian, DeWitt, Douglas, Ford, Iroquois and 8 more | 2 hr |
| Mar 28, 1:17 PM CDT | Mesoscale Discussion | SPC | Alexander, Bond, Clark, Clay, Clinton, Crawford and 34 more | 88 min |
| Mar 28, 2:45 PM CDT | Tornado Watch | SPC | Adams, Brown, Bureau, Calhoun, Cass, Champaign and 44 more | 6 hr |
| Mar 28, 3:53 PM CDT | Tornado Watch | SPC | Alexander, Bond, Clark, Clay, Clinton, Crawford and 30 more | 5 hr |
| Mar 28, 4:59 PM CDT | Mesoscale Discussion | SPC | Gallatin, Hamilton, Hardin, Johnson, Massac, Pope and 2 more | 61 min |
| Mar 28, 5:21 PM CDT | Mesoscale Discussion | SPC | Brown, Fulton, Hancock, Henderson, Henry, Knox and 7 more | 84 min |
| Mar 28, 6:42 PM CDT | Mesoscale Discussion | SPC | Carroll, Jo Daviess, Stephenson | 93 min |
| Mar 28, 7:05 AM CDT | Mesoscale Discussion | SPC | Barry, Barton, Bates, Benton, Boone, Camden and 27 more | 85 min |
| Mar 28, 2:10 PM CDT | Tornado Watch | SPC | Dunklin, Pemiscot | 5 hr |
| Mar 28, 2:56 PM CDT | Mesoscale Discussion | SPC | Dunklin, Pemiscot | 94 min |
| Mar 28, 6:34 PM CDT | Tornado Watch | SPC | Dunklin, Pemiscot | 7 hr |
Nearby
Mesoscale Discussions in Iowa, 2020Mesoscale Discussions in Missouri, 2020Mesoscale Discussions in Illinois, 2020Every mesoscale discussion in 2020
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.