Alert archive / Missouri / Mesoscale Discussions in 2023
Mesoscale Discussion 1990
The Storm Prediction Center issued this mesoscale discussion at Aug 14, 2023, 2:38 AM CDT for 5 counties in Illinois; 5 counties in Kentucky; 7 counties in Missouri. It was in force for 97 min.
The area
The outline as issued.
The facts
- Issued
- Aug 14, 2023, 2:38 AM CDT (07:38 UTC)
- Expired
- Aug 14, 2023, 4:15 AM CDT
- In force
- 97 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 646
Counties Alexander County, IL, Johnson County, IL, Massac County, IL, Pulaski County, IL, Union County, IL, Ballard County, KY, Carlisle County, KY, Graves County, KY, Hickman County, KY, McCracken County, KY, Bollinger County, MO, Cape Girardeau County, MO, Madison County, MO, Mississippi County, MO, New Madrid County, MO, Scott County, MO, Stoddard County, MO
The radar
The Paducah radar (KPAH), 54 km from the middle of the area, began a volume at 07:40 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
Little Rock, AR (KLZK), launched 00:00Z, 7.6 hours before the alert went out and 271 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
- 2633 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 1647 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 115 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.2
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 |
|---|---|---|---|---|
| Aug 14, 11:13 AM CDT | Mesoscale Discussion | SPC | Cook, DeKalb, DuPage, Ford, Grundy, Iroquois and 7 more | 2 hr |
| Aug 14, 2:01 PM CDT | Mesoscale Discussion | SPC | Carroll, Jo Daviess, Whiteside | 119 min |
| Aug 14, 3:56 PM CDT | Mesoscale Discussion | SPC | Wabash, White | 2 hr |
| Aug 13, 7:15 PM CDT | Mesoscale Discussion | SPC | Barton, Dade, Jasper, Lawrence, Newton | 2 hr |
| Aug 13, 7:38 PM CDT | Severe Thunderstorm Watch | SPC | Barry, Barton, Bates, Benton, Camden, Cass and 33 more | 6 hr |
| Aug 13, 10:42 PM CDT | Mesoscale Discussion | SPC | Barry, Christian, Douglas, Greene, Howell, Jasper and 8 more | 2 hr |
| Aug 13, 11:59 PM CDT | Severe Thunderstorm Watch | SPC | Butler, Carter, Crawford, Iron, Madison, Reynolds and 4 more | 4 hr |
| Aug 14, 1:35 AM CDT | Mesoscale Discussion | SPC | McDonald | 85 min |
Nearby
Mesoscale Discussions in Missouri, 2023Mesoscale Discussions in Illinois, 2023Mesoscale Discussions in Kentucky, 2023Every mesoscale discussion in 2023
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.