Alert archive / Florida / Severe Thunderstorm Watches in 2016
Severe Thunderstorm Watch 185
The Storm Prediction Center issued this severe thunderstorm watch at May 20, 2016, 3:10 AM CDT for 5 counties in Alabama; 12 counties in Florida; 5 counties in Georgia. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 20, 2016, 3:10 AM CDT (08:10 UTC)
- Expired
- May 20, 2016, 8:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 22 counties
Coffee County, AL, Dale County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Franklin County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Leon County, FL, Liberty County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Clay County, GA, Decatur County, GA, Early County, GA, Miller County, GA, Seminole County, GA
The radar
The Eglin Afb radar (KEVX), 32 km from the middle of the area, began a volume at 08:12 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 3:31 AM CDT | Severe Thunderstorm Warning | TAE | Walton | 59 min |
| May 20, 4:30 AM CDT | Severe Thunderstorm Warning | TAE | Bay, Calhoun, Holmes, Jackson, Walton, Washington | 60 min |
| May 20, 5:42 AM CDT | Severe Thunderstorm Warning | TAE | Bay, Calhoun, Franklin, Gadsden, Gulf, Jackson and 4 more | 63 min |
| May 20, 6:31 AM CDT | Severe Thunderstorm Warning | TAE | Franklin, Gadsden, Leon, Liberty, Wakulla | 74 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 8.2 hours before the alert went out and 141 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
- 2260 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 939 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 3.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 10:52 PM CDT | Severe Thunderstorm Watch | SPC | Baldwin, Clarke, Conecuh, Covington, Escambia, Mobile and 2 more | 6 hr |
| May 20, 1:26 AM CDT | Mesoscale Discussion | SPC | Baldwin, Butler, Clarke, Conecuh, Covington, Escambia and 4 more | 2 hr |
| May 20, 2:33 PM CDT | Mesoscale Discussion | SPC | Blount, Cullman, Fayette, Franklin, Jefferson, Lamar and 10 more | 2 hr |
| May 20, 6:27 AM CDT | Mesoscale Discussion | SPC | Franklin, Gadsden, Jefferson, Leon, Liberty, Madison and 2 more | 93 min |
Nearby
Severe Thunderstorm Watches in Florida, 2016Severe Thunderstorm Watches in Alabama, 2016Severe Thunderstorm Watches in Georgia, 2016Every severe thunderstorm watch in 2016
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.