Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
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Watch Status Reports.
SEL4
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 254
NWS STORM PREDICTION CENTER NORMAN OK
950 AM EDT THU APR 28 2011
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHERN FLORIDA
SOUTHEAST GEORGIA
COASTAL WATERS
EFFECTIVE THIS THURSDAY MORNING AND AFTERNOON FROM 950 AM UNTIL
500 PM EDT.
HAIL TO 2 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 75
STATUTE MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH
NORTHEAST OF BRUNSWICK GEORGIA TO 20 MILES SOUTHWEST OF CROSS
CITY FLORIDA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).
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.
OTHER WATCH INFORMATION...CONTINUE...WW 249...WW 250...WW
251...WW 252...WW 253...
DISCUSSION...STRONG TO SEVERE FRONTAL CONVECTION CURRENTLY DRAPED
ACROSS THE EASTERN FL PANHANDLE INTO SOUTHERN GA WILL ADVANCE TOWARD
THE ATLANTIC COAST INTO THE EARLY AFTERNOON HOURS. ADDITIONAL
HEATING DOWNSTREAM OVER THE NRN PENINSULA WILL ENHANCE THE RISK FOR
FURTHER DEVELOPMENT ALONG WITH AN ATTENDANT THREAT FOR DAMAGING
WINDS AND LARGE HAIL.
AVIATION...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 500. MEAN STORM
MOTION VECTOR 24030.
...DARROW/HART
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW4
WW 254 SEVERE TSTM FL GA CW 281350Z - 282100Z
AXIS..75 STATUTE MILES EAST AND WEST OF LINE..
55NNE SSI/BRUNSWICK GA/ - 20SW CTY/CROSS CITY FL/
..AVIATION COORDS.. 65NM E/W /17S SAV - 18SW CTY/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 24030.
LAT...LON 31877980 29428208 29428458 31878237
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU4.
Watch 254 Status Report Messages:
STATUS REPORT #5 ON WW 254
VALID 282040Z - 282140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..GARNER..04/28/11
ATTN...WFO...JAX...TAE...
&&
STATUS REPORT FOR WS 254
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
FLC001-003-007-019-029-031-035-041-067-083-089-107-109-123-125-
282140-
FL
. FLORIDA COUNTIES INCLUDED ARE
ALACHUA BAKER BRADFORD
CLAY DIXIE DUVAL
FLAGLER GILCHRIST LAFAYETTE
MARION NASSAU PUTNAM
ST. JOHNS TAYLOR UNION
$$
AMZ450-452-454-GMZ730-765-282140-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
COASTAL WATERS FROM ALTAMAHA SOUND TO FERNANDINA BEACH FL OUT 20
NM
COASTAL WATERS FROM FERNANDINA BEACH TO ST. AUGUSTINE FL OUT 20
NM
COASTAL WATERS FROM ST. AUGUSTINE TO FLAGLER BEACH FL OUT 20 NM
APALACHEE BAY OR COASTAL WATERS FROM KEATON BEACH TO OCHLOCKONEE
RIVER FL OUT TO 20 NM
COASTAL WATERS FROM SUWANNEE RIVER TO KEATON BEACH OUT 20 NM
$$
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.
$$
STATUS REPORT #4 ON WW 254
VALID 281940Z - 282040Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..GARNER..04/28/11
ATTN...WFO...JAX...TAE...
&&
STATUS REPORT FOR WS 254
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
FLC001-003-007-019-023-029-031-041-047-067-089-107-109-121-123-
125-282040-
FL
. FLORIDA COUNTIES INCLUDED ARE
ALACHUA BAKER BRADFORD
CLAY COLUMBIA DIXIE
DUVAL GILCHRIST HAMILTON
LAFAYETTE NASSAU PUTNAM
ST. JOHNS SUWANNEE TAYLOR
UNION
$$
GAC001-003-005-025-039-049-065-101-127-229-299-305-282040-
GA
. GEORGIA COUNTIES INCLUDED ARE
APPLING ATKINSON BACON
BRANTLEY CAMDEN CHARLTON
CLINCH ECHOLS GLYNN
PIERCE WARE WAYNE
$$
AMZ450-452-GMZ730-765-282040-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
COASTAL WATERS FROM ALTAMAHA SOUND TO FERNANDINA BEACH FL OUT 20
NM
COASTAL WATERS FROM FERNANDINA BEACH TO ST. AUGUSTINE FL OUT 20
NM
APALACHEE BAY OR COASTAL WATERS FROM KEATON BEACH TO OCHLOCKONEE
RIVER FL OUT TO 20 NM
COASTAL WATERS FROM SUWANNEE RIVER TO KEATON BEACH OUT 20 NM
$$
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.
$$
STATUS REPORT #3 ON WW 254
VALID 281835Z - 281940Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..GARNER..04/28/11
ATTN...WFO...JAX...TAE...
&&
STATUS REPORT FOR WS 254
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
FLC001-003-007-019-023-029-031-041-047-067-079-089-107-109-121-
123-125-281940-
FL
. FLORIDA COUNTIES INCLUDED ARE
ALACHUA BAKER BRADFORD
CLAY COLUMBIA DIXIE
DUVAL GILCHRIST HAMILTON
LAFAYETTE MADISON NASSAU
PUTNAM ST. JOHNS SUWANNEE
TAYLOR UNION
$$
GAC001-003-005-025-039-049-065-101-127-173-185-229-299-305-
281940-
GA
. GEORGIA COUNTIES INCLUDED ARE
APPLING ATKINSON BACON
BRANTLEY CAMDEN CHARLTON
CLINCH ECHOLS GLYNN
LANIER LOWNDES PIERCE
WARE WAYNE
$$
AMZ450-452-GMZ730-755-765-281940-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
COASTAL WATERS FROM ALTAMAHA SOUND TO FERNANDINA BEACH FL OUT 20
NM
COASTAL WATERS FROM FERNANDINA BEACH TO ST. AUGUSTINE FL OUT 20
NM
APALACHEE BAY OR COASTAL WATERS FROM KEATON BEACH TO OCHLOCKONEE
RIVER FL OUT TO 20 NM
COASTAL WATERS FROM OCHLOCKONEE RIVER TO APALACHICOLA FL OUT TO
20 NM
COASTAL WATERS FROM SUWANNEE RIVER TO KEATON BEACH OUT 20 NM
$$
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.
$$
STATUS REPORT #2 ON WW 254
VALID 281740Z - 281840Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..GARNER..04/28/11
ATTN...WFO...JAX...TAE...
&&
STATUS REPORT FOR WS 254
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
FLC001-003-007-019-023-029-031-041-047-067-079-089-107-109-121-
123-125-281840-
FL
. FLORIDA COUNTIES INCLUDED ARE
ALACHUA BAKER BRADFORD
CLAY COLUMBIA DIXIE
DUVAL GILCHRIST HAMILTON
LAFAYETTE MADISON NASSAU
PUTNAM ST. JOHNS SUWANNEE
TAYLOR UNION
$$
GAC001-003-005-025-039-049-065-101-127-173-185-229-299-305-
281840-
GA
. GEORGIA COUNTIES INCLUDED ARE
APPLING ATKINSON BACON
BRANTLEY CAMDEN CHARLTON
CLINCH ECHOLS GLYNN
LANIER LOWNDES PIERCE
WARE WAYNE
$$
AMZ450-452-GMZ730-755-765-281840-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
COASTAL WATERS FROM ALTAMAHA SOUND TO FERNANDINA BEACH FL OUT 20
NM
COASTAL WATERS FROM FERNANDINA BEACH TO ST. AUGUSTINE FL OUT 20
NM
APALACHEE BAY OR COASTAL WATERS FROM KEATON BEACH TO OCHLOCKONEE
RIVER FL OUT TO 20 NM
COASTAL WATERS FROM OCHLOCKONEE RIVER TO APALACHICOLA FL OUT TO
20 NM
COASTAL WATERS FROM SUWANNEE RIVER TO KEATON BEACH OUT 20 NM
$$
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.
$$
STATUS REPORT #1 ON WW 254
VALID 281630Z - 281740Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 663
..GARNER..04/28/11
ATTN...WFO...JAX...TAE...
&&
STATUS REPORT FOR WS 254
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
FLC001-003-007-019-023-029-031-041-047-067-079-089-107-109-121-
123-125-281740-
FL
. FLORIDA COUNTIES INCLUDED ARE
ALACHUA BAKER BRADFORD
CLAY COLUMBIA DIXIE
DUVAL GILCHRIST HAMILTON
LAFAYETTE MADISON NASSAU
PUTNAM ST. JOHNS SUWANNEE
TAYLOR UNION
$$
GAC001-003-005-025-039-049-065-101-127-173-185-229-299-305-
281740-
GA
. GEORGIA COUNTIES INCLUDED ARE
APPLING ATKINSON BACON
BRANTLEY CAMDEN CHARLTON
CLINCH ECHOLS GLYNN
LANIER LOWNDES PIERCE
WARE WAYNE
$$
AMZ450-452-GMZ730-755-765-281740-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
COASTAL WATERS FROM ALTAMAHA SOUND TO FERNANDINA BEACH FL OUT 20
NM
COASTAL WATERS FROM FERNANDINA BEACH TO ST. AUGUSTINE FL OUT 20
NM
APALACHEE BAY OR COASTAL WATERS FROM KEATON BEACH TO OCHLOCKONEE
RIVER FL OUT TO 20 NM
COASTAL WATERS FROM OCHLOCKONEE RIVER TO APALACHICOLA FL OUT TO
20 NM
COASTAL WATERS FROM SUWANNEE RIVER TO KEATON BEACH OUT 20 NM
$$
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
|
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.