Alert archive / Florida / Mesoscale Discussions in 2020
Mesoscale Discussion 1561
The Storm Prediction Center issued this mesoscale discussion at Aug 24, 2020, 2:40 PM CDT for 4 counties in Alabama; 11 counties in Florida; 8 counties in Georgia. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 24, 2020, 2:40 PM CDT (19:40 UTC)
- Expired
- Aug 24, 2020, 5:15 PM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch possible
- Chance of a watch
- 40%
All 23 counties
Baldwin County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Gadsden County, FL, Holmes County, FL, Jackson County, FL, Liberty County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Calhoun County, GA, Decatur County, GA, Dougherty County, GA, Early County, GA, Miller County, GA, Mitchell County, GA, Seminole County, GA
The radar
The Eglin Afb radar (KEVX), 24 km from the middle of the area, began a volume at 19:44 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
Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 7.7 hours before the alert went out and 144 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
- 552 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 938 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 88 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 3.1
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 24, 10:51 AM CDT | Mesoscale Discussion | SPC | Baldwin, Mobile | 84 min |
| Aug 24, 3:39 PM CDT | Tornado Watch | SPC | Houston | 8 hr |
| Aug 24, 1:46 AM CDT | Mesoscale Discussion | SPC | Bay, Calhoun, Franklin, Gulf, Liberty, Wakulla | 2 hr |
Nearby
Mesoscale Discussions in Florida, 2020Mesoscale Discussions in Georgia, 2020Mesoscale Discussions in Alabama, 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.