Alert archive / Georgia / Tornado Watches in 2016
Tornado Watch 461
The Storm Prediction Center issued this tornado watch at Sep 1, 2016, 10:47 PM EDT for 26 counties in Florida; 37 counties in Georgia; 4 counties in South Carolina. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 1, 2016, 10:47 PM EDT (02:47 UTC)
- Expired
- Sep 2, 2016, 8:00 AM EDT
- In force
- 9 hr
- Issued by
- the Storm Prediction Center
- Strongest gust expected
- 65 kt
All 67 counties
Alachua County, FL, Baker County, FL, Bradford County, FL, Citrus County, FL, Clay County, FL, Columbia County, FL, Dixie County, FL, Duval County, FL, Gilchrist County, FL, Hamilton County, FL, Hernando County, FL, Hillsborough County, FL, Jefferson County, FL, Lafayette County, FL, Levy County, FL, Madison County, FL, Marion County, FL, Nassau County, FL, Pasco County, FL, Pinellas County, FL, Putnam County, FL, Saint Johns County, FL, Sumter County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Berrien County, GA, Brantley County, GA, Brooks 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, Cook County, GA, Echols County, GA, Effingham County, GA, Emanuel 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, Montgomery County, GA, Pierce County, GA, Screven County, GA, Tattnall County, GA, Telfair County, GA, Toombs County, GA, Treutlen County, GA, Ware County, GA, Wayne County, GA, Wheeler County, GA, Allendale County, SC, Beaufort County, SC, Hampton County, SC, Jasper County, SC
The radar
The Moody AFB radar (KVAX), 64 km from the middle of the area, began a volume at 02:50 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
- 40%
- 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
- 30%
Warnings issued inside it
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 10:48 PM EDT | Tornado Warning | TAE | Jefferson, Leon, Taylor, Wakulla | 27 min |
| Sep 1, 11:12 PM EDT | Tornado Warning | TAE | Dixie, Lafayette | 33 min |
| Sep 1, 11:39 PM EDT | Tornado Warning | TAE | Dixie, Lafayette, Taylor | 25 min |
| Sep 2, 12:09 AM EDT | Tornado Warning | JAX | Camden, Glynn | 36 min |
| Sep 2, 3:23 AM EDT | Tornado Warning | CHS | Liberty, Long, McIntosh | 37 min |
| Sep 2, 3:30 AM EDT | Tornado Warning | CHS | Bryan, Chatham | 30 min |
| Sep 2, 3:38 AM EDT | Tornado Warning | CHS | Liberty, McIntosh | 37 min |
| Sep 2, 4:00 AM EDT | Tornado Warning | CHS | Bryan, Liberty | 30 min |
| Sep 2, 6:14 AM EDT | Tornado Warning | CHS | Jasper | 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
Jacksonville, FL (KJAX), launched 00:00Z, 2.8 hours before the alert went out and 86 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
- 1079 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 770 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 212 m²/s²
- 0-3 km storm-relative helicity
- 249 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.8
The text
As transmitted.
891
WWUS20 KWNS 020244
SEL1
SPC WW 020244
FLZ000-GAZ000-SCZ000-CWZ000-021200-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 461
NWS STORM PREDICTION CENTER NORMAN OK
1050 PM EDT THU SEP 1 2016
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
FLORIDA
GEORGIA
SOUTH CAROLINA
COASTAL WATERS
EFFECTIVE THIS THURSDAY NIGHT AND FRIDAY MORNING FROM 1050 PM
UNTIL 800 AM EDT.
TORNADOES...THUNDERSTORM WIND GUSTS TO 75 MPH...AND DANGEROUS
LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
MILES EITHER SIDE OF A LINE FROM 55 MILES SOUTH SOUTHWEST OF
CROSS CITY FLORIDA TO 30 MILES NORTHEAST OF SAVANNAH GEORGIA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU1).
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.
OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 460. WATCH NUMBER 460 WILL NOT BE IN EFFECT AFTER
1050 PM EDT.
DISCUSSION...
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH EXTREME
TURBULENCE AND SURFACE WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI
WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION VECTOR 16040.
...EDWARDSSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 1, 10:01 PM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Citrus, Clay, Columbia and 15 more | 2 hr |
| Sep 2, 12:45 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Citrus, Clay, Columbia and 18 more | 4 hr |
| Sep 2, 5:05 AM EDT | Mesoscale Discussion | SPC | Bryan, Bulloch, Chatham, Effingham, Liberty | 2 hr |
| Sep 2, 7:51 AM EDT | Tornado Watch | SPC | Bryan, Bulloch, Candler, Chatham, Effingham, Evans and 6 more | 8 hr |
| Sep 2, 12:55 PM EDT | Mesoscale Discussion | SPC | Bryan, Bulloch, Chatham, Effingham, Evans, Liberty and 3 more | 2 hr |
| Sep 2, 3:29 PM EDT | Mesoscale Discussion | SPC | Georgetown, Horry, Williamsburg | 3 hr |
| Sep 2, 3:45 PM EDT | Tornado Watch | SPC | Florence, Georgetown, Horry, Marion, Williamsburg | 11 hr |
Nearby
Tornado Watches in Georgia, 2016Tornado Watches in Florida, 2016Tornado Watches in South Carolina, 2016Every tornado 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.