Alert archive / Georgia / Tornado Watches in 2021
Tornado Watch 90
The Storm Prediction Center issued this tornado watch at Apr 10, 2021, 10:20 AM EDT for 10 counties in Florida; 14 counties in Georgia. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 10, 2021, 10:20 AM EDT (14:20 UTC)
- Expired
- Apr 10, 2021, 2:00 PM EDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 24 counties
Dixie County, FL, Franklin County, FL, Gadsden County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Taylor County, FL, Wakulla County, FL, Baker County, GA, Berrien County, GA, Brooks County, GA, Colquitt County, GA, Cook County, GA, Decatur County, GA, Early County, GA, Grady County, GA, Lanier County, GA, Lowndes County, GA, Miller County, GA, Mitchell County, GA, Seminole County, GA, Thomas County, GA
The radar
The Tallahassee radar (KTLH), 30 km from the middle of the area, began a volume at 14:23 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
- 30%
- One or more EF2 to EF5 tornadoes
- 10%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 10:30 AM EDT | Tornado Warning | TAE | Calhoun, Liberty | 30 min |
| Apr 10, 10:56 AM EDT | Severe Thunderstorm Warning | TAE | Franklin, Gadsden, Leon, Wakulla | 82 min |
| Apr 10, 11:29 AM EDT | Tornado Warning | TAE | Leon | 31 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 12:00Z, 2.3 hours before the alert went out and 27 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
- 13 J/kg
- Mixed-layer CIN
- -541 J/kg
- Mixed-layer LCL
- 1046 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 276 m²/s²
- 0-3 km storm-relative helicity
- 231 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
786 WWUS20 KWNS 101413 SEL0 SPC WW 101413 FLZ000-GAZ000-CWZ000-101800- URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 90 NWS Storm Prediction Center Norman OK 1015 AM EDT Sat Apr 10 2021 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of The eastern Florida Panhandle Extreme southwestern Georgia Coastal Waters * Effective this Saturday morning and afternoon from 1015 AM until 200 PM EDT. * Primary threats include... A couple tornadoes possible Scattered damaging wind gusts to 70 mph possible Isolated large hail events to 1 inch in diameter possible SUMMARY...A well-developed squall line will continue to surge eastward across the Florida Panhandle and southwestern Georgia through midday into early afternoon. Given the observed bowing structures and embedded circulations, expect the threat for a few damaging gusts and a couple of tornadoes to continue for the next few hours. The tornado watch area is approximately along and 55 statute miles east and west of a line from 25 miles northwest of Moultrie GA to 55 miles southeast of Apalachicola FL. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU0). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. && AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 27045. ...Thompson
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 2:52 AM EDT | Mesoscale Discussion | SPC | Escambia, Holmes, Okaloosa, Santa Rosa, Walton, Washington | 113 min |
| Apr 10, 3:30 AM EDT | Tornado Watch | SPC | Bay, Calhoun, Escambia, Gulf, Holmes, Jackson and 4 more | 8 hr |
| Apr 10, 5:06 AM EDT | Mesoscale Discussion | SPC | Escambia, Holmes, Okaloosa, Santa Rosa, Walton, Washington | 114 min |
| Apr 10, 8:10 AM EDT | Mesoscale Discussion | SPC | Bay, Calhoun, Escambia, Franklin, Gadsden, Gulf and 8 more | 2 hr |
| Apr 10, 9:58 AM EDT | Mesoscale Discussion | SPC | Bay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 9 more | 92 min |
| Apr 10, 11:49 AM EDT | Mesoscale Discussion | SPC | Jefferson, Lafayette, Leon, Madison, Taylor, Wakulla | 116 min |
| Apr 10, 3:13 PM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Citrus, Clay, Columbia and 8 more | 2 hr |
Nearby
Tornado Watches in Georgia, 2021Tornado Watches in Florida, 2021Every tornado watch in 2021
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.