Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL4
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 684
NWS Storm Prediction Center Norman OK
830 AM EDT Thu Sep 26 2024
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Eastern Georgia
Central and Southern South Carolina
Coastal Waters
* Effective this Thursday morning and evening from 830 AM until
900 PM EDT.
* Primary threats include...
Several tornadoes likely
SUMMARY...A long-duration and gradually increasing tornado threat
will exist in association with the increasingly strong low-level
winds on the northeast periphery of Hurricane Helene.
The tornado watch area is approximately along and 70 statute miles
east and west of a line from 35 miles south of Savannah GA to 30
miles north of Columbia SC. For a complete depiction of the watch
see the associated watch outline update (WOUS64 KWNS WOU4).
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.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 683...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 0 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean
storm motion vector 16025.
...Guyer
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW4
WW 684 TORNADO GA SC CW 261230Z - 270100Z
AXIS..70 STATUTE MILES EAST AND WEST OF LINE..
35S SAV/SAVANNAH GA/ - 30N CAE/COLUMBIA SC/
..AVIATION COORDS.. 60NM E/W /33S SAV - 30N CAE/
WIND GUSTS..60 KNOTS.
MAX TOPS TO 500.MEAN STORM MOTION VECTOR 16025.
LAT...LON 31628239 34368235 34367989 31628001
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU4.
Watch 684 Status Report Messages:
STATUS REPORT #1 ON WW 684
VALID 261850Z - 261940Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..GOSS..09/26/24
ATTN...WFO...CHS...CAE...FFC...
&&
STATUS REPORT FOR WT 684
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
GAC029-031-033-043-051-073-091-103-107-109-163-165-167-175-179-
181-183-189-191-209-245-251-267-271-279-283-303-309-319-
261940-
GA
. GEORGIA COUNTIES INCLUDED ARE
BRYAN BULLOCH BURKE
CANDLER CHATHAM COLUMBIA
DODGE EFFINGHAM EMANUEL
EVANS JEFFERSON JENKINS
JOHNSON LAURENS LIBERTY
LINCOLN LONG MCDUFFIE
MCINTOSH MONTGOMERY RICHMOND
SCREVEN TATTNALL TELFAIR
TOOMBS TREUTLEN WASHINGTON
WHEELER WILKINSON
$$
SCC003-005-009-011-013-015-017-019-027-029-035-037-039-049-053-
055-061-063-065-071-075-079-081-085-261940-
SC
. SOUTH CAROLINA COUNTIES INCLUDED ARE
AIKEN ALLENDALE BAMBERG
BARNWELL BEAUFORT BERKELEY
CALHOUN CHARLESTON CLARENDON
COLLETON DORCHESTER EDGEFIELD
FAIRFIELD HAMPTON JASPER
KERSHAW LEE LEXINGTON
MCCORMICK NEWBERRY ORANGEBURG
RICHLAND SALUDA SUMTER
$$
AMZ330-350-352-354-370-372-374-261940-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
CHARLESTON HARBOR
COASTAL WATERS FROM SOUTH SANTEE RIVER TO EDISTO BEACH SC OUT 20
NM
COASTAL WATERS FROM EDISTO BEACH SC TO SAVANNAH GA OUT 20 NM
COASTAL WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA OUT 20 NM
...INCLUDING GRAYS REEF NATIONAL MARINE SANCTUARY
WATERS FROM SOUTH SANTEE RIVER SC TO EDISTO BEACH SC EXTENDING
FROM 20 NM TO 40 NM
WATERS FROM EDISTO BEACH SC TO SAVANNAH GA EXTENDING FROM 20 NM
TO 40 NM
WATERS FROM SAVANNAH GA TO ALTAMAHA SOUND GA EXTENDING FROM 20 NM
TO 60 NM
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
High (90%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (20%)
|
Wind
Probability of 10 or more severe wind events
|
Low (10%)
|
Probability of 1 or more wind events > 65 knots
|
Low (10%)
|
Hail
Probability of 10 or more severe hail events
|
Low (<5%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (<5%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
Low (20%)
|
For each watch, probabilities for particular events inside the watch
(listed above in each table) are determined by the issuing forecaster.
The "Low" category contains probability values ranging from less than 2%
to 20% (EF2-EF5 tornadoes), less than 5% to 20% (all other probabilities),
"Moderate" from 30% to 60%, and "High" from 70% to greater than 95%.
High values are bolded and lighter in color to provide awareness of
an increased threat for a particular event.
weather.gov 
@NWSSPC
