Alert archive / Florida / Tornado Watches in 2016
Tornado Watch 460
The Storm Prediction Center issued this tornado watch at Sep 1, 2016, 2:50 PM EDT for 41 counties in Florida. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 1, 2016, 2:50 PM EDT (18:50 UTC)
- Expired
- Sep 1, 2016, 11:00 PM EDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 60 kt
All 41 counties
Alachua County, FL, Baker County, FL, Bradford County, FL, Brevard County, FL, Calhoun County, FL, Citrus County, FL, Clay County, FL, Columbia County, FL, Dixie County, FL, Duval County, FL, Flagler County, FL, Franklin County, FL, Gadsden County, FL, Gilchrist County, FL, Gulf County, FL, Hamilton County, FL, Hernando County, FL, Hillsborough County, FL, Jefferson County, FL, Lafayette County, FL, Lake County, FL, Leon County, FL, Levy County, FL, Liberty 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, Wakulla County, FL
The radar
The Tallahassee radar (KTLH), 148 km from the middle of the area, began a volume at 18:54 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
- 50%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 20%
- One or more gusts of 65 knots or more
- 10%
- 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
20 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 2:53 PM EDT | Severe Thunderstorm Warning | MLB | Lake, Orange | 37 min |
| Sep 1, 3:05 PM EDT | Severe Thunderstorm Warning | MLB | Lake, Orange | 25 min |
| Sep 1, 3:18 PM EDT | Tornado Warning | TBW | Hernando, Pasco | 17 min |
| Sep 1, 3:36 PM EDT | Severe Thunderstorm Warning | MLB | Lake, Seminole, Volusia | 39 min |
| Sep 1, 3:39 PM EDT | Tornado Warning | MLB | Volusia | 36 min |
| Sep 1, 4:52 PM EDT | Severe Thunderstorm Warning | MLB | Brevard, Volusia | 53 min |
| Sep 1, 5:27 PM EDT | Tornado Warning | TBW | Hernando, Pasco | 16 min |
| Sep 1, 8:01 PM EDT | Tornado Warning | TAE | Taylor | 15 min |
| Sep 1, 8:28 PM EDT | Tornado Warning | MLB | Lake | 32 min |
| Sep 1, 8:34 PM EDT | Tornado Warning | MLB | Lake, Orange | 26 min |
| Sep 1, 8:34 PM EDT | Tornado Warning | TAE | Taylor | 26 min |
| Sep 1, 8:51 PM EDT | Tornado Warning | TAE | Lafayette, Taylor | 24 min |
| Sep 1, 8:58 PM EDT | Tornado Warning | TAE | Dixie | 32 min |
| Sep 1, 9:02 PM EDT | Tornado Warning | MLB | Orange, Seminole | 28 min |
| Sep 1, 9:07 PM EDT | Tornado Warning | TAE | Lafayette | 23 min |
| Sep 1, 9:19 PM EDT | Tornado Warning | TAE | Dixie, Lafayette | 41 min |
| Sep 1, 9:58 PM EDT | Tornado Warning | TAE | Lafayette | 20 min |
| Sep 1, 10:35 PM EDT | Tornado Warning | TAE | Dixie, Lafayette, Taylor | 25 min |
| Sep 1, 10:45 PM EDT | Tornado Warning | TAE | Lafayette, Taylor | 30 min |
| Sep 1, 10:48 PM EDT | Tornado Warning | TAE | Jefferson, Leon, Taylor, Wakulla | 27 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, 6.8 hours before the alert went out and 146 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
- 365 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 740 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 15 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
243 WWUS20 KWNS 011849 SEL0 SPC WW 011849 FLZ000-CWZ000-020300- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 460 NWS STORM PREDICTION CENTER NORMAN OK 250 PM EDT THU SEP 1 2016 THE NWS STORM PREDICTION CENTER HAS ISSUED A * TORNADO WATCH FOR PORTIONS OF NORTHERN AND CENTRAL FLORIDA COASTAL WATERS * EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 250 PM UNTIL 1100 PM EDT. * PRIMARY THREATS INCLUDE... A FEW TORNADOES POSSIBLE ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE SUMMARY...WITHIN A MOIST ENVIRONMENT...INCREASINGLY STRONG LOW/MID-LEVEL WINDS ON THE EASTERN PERIPHERY OF CURRENT TROPICAL STORM HERMINE WILL CONTRIBUTE TO AN INCREASING POTENTIAL FOR A FEW TORNADOES AND POSSIBLY ISOLATED THUNDERSTORM-RELATED WIND DAMAGE THROUGH THIS EVENING. THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 90 STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES EAST NORTHEAST OF TALLAHASSEE FLORIDA TO 40 MILES EAST SOUTHEAST OF SAINT PETERSBURG FLORIDA. 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 0.5 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 19030. ...GUYER
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 4:09 AM EDT | Mesoscale Discussion | SPC | Sarasota | 3 hr |
| Sep 1, 11:39 AM EDT | Mesoscale Discussion | SPC | Hillsborough, Manatee, Pasco, Pinellas, Sarasota | 2 hr |
| Sep 1, 2:12 PM EDT | Mesoscale Discussion | SPC | Alachua, Bradford, Citrus, Clay, Dixie, Franklin and 17 more | 3 hr |
| Sep 1, 3:03 PM EDT | Mesoscale Discussion | SPC | Charlotte, DeSoto, Glades, Hendry, Highlands, Martin and 2 more | 87 min |
| Sep 1, 6:44 PM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Citrus, Clay, Columbia and 25 more | 3 hr |
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.