Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL9
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 269
NWS STORM PREDICTION CENTER NORMAN OK
200 PM EDT WED MAY 9 2012
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
EASTERN GEORGIA
SOUTHEAST SOUTH CAROLINA
COASTAL WATERS
EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 200 PM UNTIL
900 PM EDT.
HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 35
STATUTE MILES EITHER SIDE OF A LINE FROM 30 MILES NORTH NORTHEAST
OF CHARLESTON SOUTH CAROLINA TO 55 MILES SOUTHWEST OF SAVANNAH
GEORGIA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.
DISCUSSION...A BAND OF TSTMS...INCLUDING A BOWING SEGMENT...HAS
EVOLVED OVER THE LOWER SAVANNAH RIVER VALLEY THIS AFTERNOON. INFLOW
AIR MASS IS WARM AND MOIST WITH MLCAPE OF 1000-2000 J/KG. THIS
INSTABILITY COUPLED WITH FORCING FOR ASCENT ATTENDANT TO A WEAK
MIDLEVEL IMPULSE MOVING ACROSS THE REGION SHOULD SUSTAIN ONGOING
STORMS EWD ACROSS THE WATCH AREA. ADDITIONAL STORMS ARE EXPECTED TO
DEVELOP INVOF THE COAST ALONG SEA BREEZE CIRCULATION. WHILE
DAMAGING WINDS APPEAR TO BE THE PRIMARY HAZARD...SOME HAIL IS ALSO
POSSIBLE WITH THE STRONGEST STORMS.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 27025.
...MEAD
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW9
WW 269 SEVERE TSTM GA SC CW 091800Z - 100100Z
AXIS..35 STATUTE MILES EITHER SIDE OF LINE..
30NNE CHS/CHARLESTON SC/ - 55SW SAV/SAVANNAH GA/
..AVIATION COORDS.. 30NM EITHER SIDE /27NNE CHS - 33E AMG/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 27025.
LAT...LON 32907944 31178148 31958223 33688022
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU9.
Watch 269 Status Report Messages:
STATUS REPORT #4 ON WW 269
VALID 092245Z - 092340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 ENE VDI
TO 30 NNW SAV TO 40 NE SAV TO 35 SSE CHS.
..COHEN..05/09/12
ATTN...WFO...CHS...
&&
STATUS REPORT FOR WS 269
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
GAC029-051-103-179-183-191-092340-
GA
. GEORGIA COUNTIES INCLUDED ARE
BRYAN CHATHAM EFFINGHAM
LIBERTY LONG MCINTOSH
$$
SCC013-053-092340-
SC
. SOUTH CAROLINA COUNTIES INCLUDED ARE
BEAUFORT JASPER
$$
AMZ352-354-092340-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
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
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 269
VALID 092140Z - 092240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 NNW SAV
TO 35 SSE CHS.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 766
..COHEN..05/09/12
ATTN...WFO...CHS...
&&
STATUS REPORT FOR WS 269
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
GAC029-031-043-051-103-109-179-183-191-267-092240-
GA
. GEORGIA COUNTIES INCLUDED ARE
BRYAN BULLOCH CANDLER
CHATHAM EFFINGHAM EVANS
LIBERTY LONG MCINTOSH
TATTNALL
$$
SCC013-053-092240-
SC
. SOUTH CAROLINA COUNTIES INCLUDED ARE
BEAUFORT JASPER
$$
AMZ352-354-092240-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
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
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 269
VALID 092035Z - 092140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..GOSS..05/09/12
ATTN...WFO...CHS...
&&
STATUS REPORT FOR WS 269
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
GAC029-031-043-051-103-109-179-183-191-267-092140-
GA
. GEORGIA COUNTIES INCLUDED ARE
BRYAN BULLOCH CANDLER
CHATHAM EFFINGHAM EVANS
LIBERTY LONG MCINTOSH
TATTNALL
$$
SCC013-015-019-029-035-049-053-092140-
SC
. SOUTH CAROLINA COUNTIES INCLUDED ARE
BEAUFORT BERKELEY CHARLESTON
COLLETON DORCHESTER HAMPTON
JASPER
$$
AMZ330-350-352-354-092140-
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
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 269
VALID 091930Z - 092040Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..GOSS..05/09/12
ATTN...WFO...CHS...
&&
STATUS REPORT FOR WS 269
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
GAC029-031-043-051-103-109-179-183-191-267-092040-
GA
. GEORGIA COUNTIES INCLUDED ARE
BRYAN BULLOCH CANDLER
CHATHAM EFFINGHAM EVANS
LIBERTY LONG MCINTOSH
TATTNALL
$$
SCC013-015-019-029-035-049-053-092040-
SC
. SOUTH CAROLINA COUNTIES INCLUDED ARE
BEAUFORT BERKELEY CHARLESTON
COLLETON DORCHESTER HAMPTON
JASPER
$$
AMZ330-350-352-354-092040-
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
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (20%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Low (5%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (30%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (30%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (30%)
|
Probability
of 1 or
more hailstones > 2 inches
|
Low (20%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (70%)
|
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% (F2-F5 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.