Alert archive / Florida / Tornado Watches in 2023
Tornado Watch 660
The Storm Prediction Center issued this tornado watch at Aug 29, 2023, 8:28 PM EDT for 26 counties in Florida. It was in force for 10 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 29, 2023, 8:28 PM EDT (00:28 UTC)
- Expired
- Aug 30, 2023, 6:00 AM EDT
- In force
- 10 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 65 kt
All 26 counties
Alachua County, FL, Charlotte County, FL, Citrus County, FL, DeSoto County, FL, Dixie County, FL, Gilchrist County, FL, Hardee County, FL, Hernando County, FL, Highlands County, FL, Hillsborough County, FL, Lafayette County, FL, Lake County, FL, Lee County, FL, Levy County, FL, Manatee County, FL, Marion County, FL, Orange County, FL, Osceola County, FL, Pasco County, FL, Pinellas County, FL, Polk County, FL, Sarasota County, FL, Seminole County, FL, Sumter County, FL, Taylor County, FL, Volusia County, FL
The radar
The Tampa radar (KTBW), 97 km from the middle of the area, began a volume at 00:30 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
5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 1:40 AM EDT | Tornado Warning | TBW | Hardee, Highlands, Polk | 20 min |
| Aug 30, 4:06 AM EDT | Tornado Warning | MLB | Orange, Osceola | 24 min |
| Aug 30, 4:18 AM EDT | Tornado Warning | TBW | Hardee, Polk | 27 min |
| Aug 30, 4:23 AM EDT | Tornado Warning | TBW | Citrus, Hernando, Sumter | 22 min |
| Aug 30, 4:34 AM EDT | Tornado Warning | MLB | Orange, Seminole | 26 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
Tampa Bay, FL (KTBW), launched 00:00Z, 0.5 hours before the alert went out and 97 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
- 250 J/kg
- Mixed-layer CIN
- -102 J/kg
- Mixed-layer LCL
- 888 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 438 m²/s²
- 0-3 km storm-relative helicity
- 381 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.6
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 5:38 AM EDT | Tornado Watch | SPC | Alachua, Baker, Bradford, Brevard, Citrus, Clay and 27 more | 12 hr |
| Aug 30, 8:49 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Brevard, Clay, Columbia and 17 more | 116 min |
Nearby
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.