Alert archive / Florida / Tornado Watches in 2023
Tornado Watch 661
The Storm Prediction Center issued this tornado watch at Aug 30, 2023, 5:38 AM EDT for 33 counties in Florida; 29 counties in Georgia. It was in force for 12 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 30, 2023, 5:38 AM EDT (09:38 UTC)
- Expired
- Aug 30, 2023, 6:00 PM EDT
- In force
- 12 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 65 kt
All 62 counties
Alachua County, FL, Baker County, FL, Bradford County, FL, Brevard County, FL, Citrus County, FL, Clay County, FL, Columbia County, FL, Dixie County, FL, Duval County, FL, Flagler County, FL, Gilchrist County, FL, Hamilton County, FL, Hernando County, FL, Hillsborough County, FL, Lafayette County, FL, Lake County, FL, Levy County, FL, Madison County, FL, Marion County, FL, Nassau County, FL, Orange County, FL, Osceola County, FL, Pasco County, FL, Pinellas County, FL, Polk County, FL, Putnam County, FL, Saint Johns County, FL, Seminole County, FL, Sumter County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Volusia County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Brantley County, GA, Bryan County, GA, Bulloch County, GA, Camden County, GA, Candler County, GA, Charlton County, GA, Chatham County, GA, Clinch County, GA, Coffee County, GA, Echols County, GA, Effingham County, GA, Evans County, GA, Glynn County, GA, Jeff Davis County, GA, Jenkins County, GA, Lanier County, GA, Liberty County, GA, Long County, GA, Lowndes County, GA, McIntosh County, GA, Pierce County, GA, Screven County, GA, Tattnall County, GA, Toombs County, GA, Ware County, GA, Wayne County, GA
The radar
The Jacksonville radar (KJAX), 2 km from the middle of the area, began a volume at 09:38 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
- 60%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 5%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 40%
Warnings issued inside it
34 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 5:42 AM EDT | Tornado Warning | JAX | Charlton | 18 min |
| Aug 30, 6:03 AM EDT | Tornado Warning | TBW | Hardee, Highlands, Polk | 7 min |
| Aug 30, 6:03 AM EDT | Tornado Warning | TBW | DeSoto, Hardee, Highlands, Polk | 12 min |
| Aug 30, 6:20 AM EDT | Tornado Warning | TBW | Hardee, Highlands, Polk | 25 min |
| Aug 30, 6:26 AM EDT | Tornado Warning | JAX | Brantley, Pierce | 9 min |
| Aug 30, 6:41 AM EDT | Tornado Warning | JAX | Brantley, Glynn, Wayne | 19 min |
| Aug 30, 6:53 AM EDT | Tornado Warning | TBW | Hardee, Highlands, Polk | 12 min |
| Aug 30, 6:54 AM EDT | Tornado Warning | JAX | Marion | 12 min |
| Aug 30, 6:58 AM EDT | Tornado Warning | JAX | Wayne | 17 min |
| Aug 30, 7:17 AM EDT | Tornado Warning | JAX | Appling, Wayne | 28 min |
| Aug 30, 7:23 AM EDT | Tornado Warning | JAX | Camden, Glynn | 22 min |
| Aug 30, 7:40 AM EDT | Tornado Warning | JAX | Camden, Glynn | 35 min |
| Aug 30, 7:55 AM EDT | Tornado Warning | JAX | Glynn | 20 min |
| Aug 30, 9:01 AM EDT | Flash Flood Warning | TAE | Madison, Taylor | 3 hr |
| Aug 30, 9:07 AM EDT | Tornado Warning | TBW | Pasco | 23 min |
| Aug 30, 9:24 AM EDT | Tornado Warning | CHS | Liberty, McIntosh | 8 min |
| Aug 30, 9:35 AM EDT | Flash Flood Warning | TAE | Brooks, Lowndes | 5 hr |
| Aug 30, 10:02 AM EDT | Tornado Warning | CHS | Bryan, Chatham, Effingham, Liberty | 17 min |
| Aug 30, 10:06 AM EDT | Flash Flood Warning | JAX | Hamilton | 38 min |
| Aug 30, 10:10 AM EDT | Flash Flood Warning | JAX | Echols | 76 min |
| Aug 30, 10:17 AM EDT | Flash Flood Warning | TAE | Jefferson, Madison | 2 hr |
| Aug 30, 10:24 AM EDT | Flash Flood Warning | TAE | Lanier | 3 hr |
| Aug 30, 10:27 AM EDT | Tornado Warning | CHS | Bryan, Chatham | 33 min |
| Aug 30, 11:15 AM EDT | Flash Flood Warning | JAX | Atkinson, Clinch | 2 hr |
| Aug 30, 12:01 PM EDT | Flash Flood Warning | JAX | Atkinson, Coffee | 2 hr |
| Aug 30, 12:26 PM EDT | Flash Flood Warning | JAX | Bacon, Coffee, Ware | 2 hr |
| Aug 30, 12:43 PM EDT | Flash Flood Warning | JAX | Coffee | 2 hr |
| Aug 30, 12:54 PM EDT | Flash Flood Warning | JAX | Appling, Bacon | 3 hr |
| Aug 30, 12:56 PM EDT | Flash Flood Warning | JAX | Jeff Davis | 3 hr |
| Aug 30, 1:11 PM EDT | Flash Flood Warning | FFC | Montgomery, Telfair, Toombs, Wheeler | 4 hr |
| Aug 30, 2:19 PM EDT | Tornado Warning | CHS | Bulloch | 26 min |
| Aug 30, 3:13 PM EDT | Flash Flood Warning | CHS | Bryan, Bulloch, Candler, Evans, Liberty, Long and 1 more | 4 hr |
| Aug 30, 4:46 PM EDT | Tornado Warning | CHS | Effingham, Screven | 29 min |
| Aug 30, 4:47 PM EDT | Flash Flood Warning | CHS | Bulloch, Candler, Effingham, Jenkins, Screven | 3 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Jacksonville, FL (KJAX), launched 00:00Z, 9.6 hours before the alert went out and 4 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
- 889 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 1076 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 90 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 8:28 PM EDT | Tornado Watch | SPC | Alachua, Charlotte, Citrus, DeSoto, Dixie, Gilchrist and 20 more | 10 hr |
| Aug 30, 1:10 AM EDT | Mesoscale Discussion | SPC | Alachua, Bradford, Citrus, Columbia, DeSoto, Dixie and 16 more | 65 min |
| Aug 30, 4:23 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Brevard, Charlotte, Citrus and 35 more | 2 hr |
| Aug 30, 8:49 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Brevard, Clay, Columbia and 17 more | 116 min |
Nearby
Tornado Watches in Florida, 2023Tornado Watches in Georgia, 2023Every tornado watch 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.