Alert archive / Georgia / Tornado Watches in 2011
Tornado Watch 892
The Storm Prediction Center issued this tornado watch at Nov 16, 2011, 8:14 PM EST for 14 counties in Georgia. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 16, 2011, 8:14 PM EST (01:14 UTC)
- Expired
- Nov 17, 2011, 12:41 AM EST
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Appling County, GA, Atkinson County, GA, Bacon County, GA, Brantley County, GA, Camden County, GA, Charlton County, GA, Clinch County, GA, Coffee County, GA, Echols County, GA, Glynn County, GA, Jeff Davis County, GA, Pierce County, GA, Ware County, GA, Wayne County, GA
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
- 30%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- 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
- 70%
Warnings issued inside it
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 16, 8:30 PM EST | Severe Thunderstorm Warning | JAX | Atkinson, Bacon, Clinch, Pierce, Ware | 45 min |
| Nov 16, 8:53 PM EST | Tornado Warning | JAX | Brantley, Pierce, Wayne | 37 min |
| Nov 16, 9:03 PM EST | Severe Thunderstorm Warning | JAX | Clinch | 42 min |
| Nov 16, 10:58 PM EST | Severe Thunderstorm Warning | JAX | Brantley, Pierce, Ware, Wayne | 47 min |
| Nov 16, 11:51 PM EST | Severe Thunderstorm Warning | JAX | Brantley, Glynn, Pierce, Wayne | 39 min |
| Nov 17, 12:31 AM EST | Severe Thunderstorm Warning | JAX | Clinch, Echols | 29 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, 1.2 hours before the alert went out and 116 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
- 769 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 991 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 123 m²/s²
- 0-3 km storm-relative helicity
- 139 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 2.4
The text
As transmitted, in the capitals the NWS used until 2016.
899
WWUS20 KWNS 170114
SEL2
SPC WW 170114
GAZ000-CWZ000-170700-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 892
NWS STORM PREDICTION CENTER NORMAN OK
815 PM EST WED NOV 16 2011
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTHEAST GEORGIA
COASTAL WATERS
EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 815 PM
UNTIL 200 AM EST.
TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE
MILES EAST AND WEST OF A LINE FROM 60 MILES NORTH NORTHWEST OF
BRUNSWICK GEORGIA TO 40 MILES SOUTH OF WAYCROSS GEORGIA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU2).
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...CONTINUE...WW 890...WW 891...
DISCUSSION...A BROKEN BAND OF STRONG/SEVERE TSTMS...IN THE FORM OF A
QLCS WITH EMBEDDED BOWS/CIRCULATIONS...WILL CONTINUE TO STEADILY
PROGRESS EAST-NORTHEASTWARD ACROSS SOUTHEAST GA THIS EVENING. WHILE
INSTABILITY IS MODEST...A HIGH DEGREE OF SHEAR/SRH WILL SUPPORT THE
POTENTIAL FOR SUSTAINED QLCS STRUCTURES WITH EMBEDDED
BOWS/MESOVORTICES CAPABLE OF A TORNADO OR TWO AND WIND DAMAGE.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 24040.
...GUYER/HARTSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 17, 12:47 AM EST | Mesoscale Discussion | SPC | Brantley, Camden, Charlton, Clinch, Echols, Glynn and 1 more | 58 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.