Atlantic Tropical Weather Discussion

000
AXNT20 KNHC 210601
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
205 AM EDT TUE AUG 21 2012

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL 
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTIONS
OF SOUTH AMERICA...AND ATLANTIC OCEAN TO THE AFRICAN COAST
FROM THE EQUATOR TO 32N. THE FOLLOWING INFORMATION IS BASED
ON SATELLITE IMAGERY...WEATHER OBSERVATIONS...RADAR...AND 
METEOROLOGICAL ANALYSIS.

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 0515 UTC.

...SPECIAL FEATURES...

AN ATLANTIC OCEAN TROPICAL WAVE IS ALONG 16N26W 13N27W TO
A 1010 MB LOW PRESSURE CENTER THAT IS ALONG THE WAVE NEAR 
10N27W. NUMEROUS STRONG CONVECTIVE PRECIPITATION IS FROM 8N
TO 11N BETWEEN 29W AND 32W. BROKEN TO OVERCAST MULTILAYERED
CLOUDS AND OTHER POSSIBLE RAINSHOWERS ARE ELSEWHERE FROM 10N
TO 22N BETWEEN 23W AND 34W. A MIDDLE LEVEL TO UPPER LEVEL
INVERTED TROUGH IS ALONG 22N30W 16N32W 10N33W TO THE WEST
OF THIS WAVE. THIS SYSTEM HAS A MEDIUM CHANCE OF BECOMING
A TROPICAL CYCLONE DURING THE NEXT 48 HOURS AS IT MOVES
WESTWARD 15 TO 20 MPH.

AN ATLANTIC OCEAN TROPICAL WAVE IS ALONG 20N47W 17N49W TO
A 1009 MB LOW PRESSURE THAT IS ALONG THE WAVE NEAR 15N49W.
CONVECTIVE PRECIPITATION...SCATTERED STRONG FROM 10N TO 13N
BETWEEN 46W AND 52W ALONG THE SOUTHERN SIDE OF THE SYSTEM...
SCATTERED MODERATE TO ISOLATED STRONG ALONG THE NORTHERN SIDE
OF THE SYSTEM FROM 13N TO 18N BETWEEN 46W AND 52W. BROKEN TO 
OVERCAST MULTILAYERED CLOUDS AND OTHER POSSIBLE RAINSHOWERS 
COVER THE ATLANTIC OCEAN ELSEWHERE FROM 10N TO 20N BETWEEN 38W 
AND 56W. THIS SYSTEM HAS A HIGH CHANCE OF BECOMING A TROPICAL 
CYCLONE DURING THE NEXT 48 HOURS AS IT MOVES WESTWARD 20 TO
25 MPH. IT IS POSSIBLE THAT THIS LARGE DISTURBANCE MAY REACH
THE LESSER ANTILLES BY WEDNESDAY...AND RESIDENTS IN THAT AREA
SHOULD MONITOR CLOSELY THE PROGRESS OF THIS SYSTEM SINCE
TROPICAL STORM WATCHES MAY BE REQUIRED SOON FOR SOME OF
THOSE ISLANDS.

A SURFACE TROUGH EXTENDS FROM SOUTHEASTERN LOUISIANA TO
26N94W IN THE NORTHWESTERN GULF OF MEXICO...TO 22N97W IN
THE WEST CENTRAL GULF OF MEXICO. BROKEN TO OVERCAST MULTILAYERED 
CLOUDS AND ISOLATED MODERATE CONVECTIVE PRECIPITATION ARE TO THE 
SOUTHEAST OF THE LINE THAT RUNS FROM THE FLORIDA PANHANDLE ALONG 
87W TO THE MEXICO COAST ALONG 25N. THE AREA OF CONCENTRATED 
INTEREST IS ALONG THE MEXICO GULF COAST/COASTAL WATERS ROUGHLY
FROM 21N TO 25N. SOME GRADUAL DEVELOPMENT OF THIS SYSTEM STILL
IS POSSIBLE IF IT REMAINS OVER WATER DURING THE NEXT DAY OR TWO.
THIS SYSTEM HAS A MEDIUM CHANCE OF BECOMING A TROPICAL CYCLONE
DURING THE NEXT 48 HOURS AS IT DRIFTS WESTWARD. 

...TROPICAL WAVES...

AN ATLANTIC OCEAN TROPICAL WAVE IS ALONG 18N59W 13N58W 9N57W. 
BROKEN TO OVERCAST MULTILAYERED CLOUDS AND ISOLATED RAINSHOWERS
COVER THE ATLANTIC OCEAN AND THE CARIBBEAN SEA FROM 8N TO 19N
BETWEEN 56W AND 63W. 

A WESTERN CARIBBEAN SEA TROPICAL WAVE IS ALONG 20N84W...REACHING 
EASTERN COASTAL HONDURAS NEAR 16N85W...INTO CENTRAL NICARAGUA
NEAR 13N85W. AN UPPER LEVEL CYCLONIC CIRCULATION CENTER IS NEAR 
18N90W IN NORTHERN GUATEMALA. UPPER LEVEL CYCLONIC WIND FLOW 
MOVES AROUND THE 18N90W CIRCULATION CENTER FROM EL SALVADOR AND 
HONDURAS TO THE YUCATAN CHANNEL AND THE YUCATAN PENINSULA OF 
MEXICO BETWEEN 85W AND 95W IN THE ISTHMUS OF TEHUANTEPEC OF 
MEXICO. CONVECTIVE PRECIPITATION...NUMEROUS STRONG COVERS THE 
ISTHMUS OF TEHUANTEPEC...SCATTERED MODERATE TO ISOLATED STRONG
IN CUBA TO THE WEST OF 79W...WIDELY SCATTERED MODERATE TO 
ISOLATED STRONG FROM NORTHWESTERN NICARAGUA INTO WESTERN 
HONDURAS AND NORTHERN EL SALVADOR TO WESTERN GUATEMALA...
ISOLATED MODERATE IN THE NORTHWESTERN CORNER OF THE CARIBBEAN 
SEA TO THE NORTH OF 14N TO THE WEST OF 80W. 

...THE ITCZ/THE MONSOON TROUGH...

THE MONSOON TROUGH PASSES THROUGH COASTAL MAURITANIA NEAR 20N16W
TO 16N20W...TO THE 1010 MB LOW PRESSURE CENTER THAT IS NEAR 
10N27W...TO 9N35W AND 11N41W. THE MONSOON TROUGH BECOMES BROKEN
AT 11N41W DUE TO THE LARGE CIRCULATION THAT IS MOVING AROUND
THE 1009 MB LOW PRESSURE CENTER THAT IS NEAR 15N49W. THE MONSOON 
TROUGH STARTS AGAIN FROM 15N49W AND IT CONTINUES TO 12N50W
AND 7N58W. CONVECTIVE PRECIPITATION...WIDELY SCATTERED MODERATE
TO ISOLATED STRONG FROM 4N TO 10N BETWEEN 27W AND 54W...ISOLATED
MODERATE FROM 7N TO 10N BETWEEN AFRICA AND 20W.

...DISCUSSION...

THE GULF OF MEXICO...

A SURFACE TROUGH EXTENDS FROM SOUTHEASTERN LOUISIANA TO 26N94W 
IN THE NORTHWESTERN GULF OF MEXICO...TO 22N97W IN THE WEST 
CENTRAL GULF OF MEXICO. BROKEN TO OVERCAST MULTILAYERED CLOUDS 
AND ISOLATED MODERATE CONVECTIVE PRECIPITATION ARE TO THE 
SOUTHEAST OF THE LINE THAT RUNS FROM THE FLORIDA PANHANDLE ALONG 
87W TO THE MEXICO COAST ALONG 25N. THE AREA OF CONCENTRATED 
INTEREST IS ALONG THE MEXICO GULF COAST/COASTAL WATERS ROUGHLY 
FROM 21N TO 25N. SOME GRADUAL DEVELOPMENT OF THIS SYSTEM STILL 
IS POSSIBLE IF IT REMAINS OVER WATER DURING THE NEXT DAY OR TWO. 
THIS SYSTEM HAS A MEDIUM CHANCE OF BECOMING A TROPICAL CYCLONE 
DURING THE NEXT 48 HOURS AS IT DRIFTS WESTWARD.

PLEASE READ THE TROPICAL WAVES SECTION FOR MORE DETAILS ABOUT 
THE WESTERN CARIBBEAN SEA TROPICAL WAVE THAT IS ALONG 
20N84W...REACHING EASTERN COASTAL HONDURAS NEAR 16N85W...INTO 
CENTRAL NICARAGUA NEAR 13N85W.

MIDDLE LEVEL TO UPPER LEVEL CYCLONE WIND FLOW COVERS THE AREA
TO THE NORTHWEST OF THE LINE FROM MEXICO NEAR 21N97W TO 25N88W 
BEYOND 32N76W IN THE ATLANTIC OCEAN. BROKEN TO OVERCAST 
MULTILAYERED CLOUDS AND ISOLATED MODERATE CONVECTIVE 
PRECIPITATION ARE TO THE SOUTHEAST OF THE LINE THAT RUNS FROM 
THE FLORIDA PANHANDLE ALONG 87W TO THE MEXICO COAST ALONG 25N...
AND TO THE NORTHWEST OF 28N80W BEYOND 32N76W IN THE ATLANTIC 
OCEAN.

A SURFACE RIDGE PASSES THROUGH A 1021 MB HIGH PRESSURE CENTER 
THAT IS NEAR 28N62W...TO SOUTHEASTERN FLORIDA...INTO THE GULF
OF MEXICO NEAR 25N94W.

FROM THE EAST CENTRAL ATLANTIC OCEAN...INTO THE NORTH CENTRAL 
AND SOUTH CENTRAL CARIBBEAN SEA...

A MIDDLE LEVEL TO UPPER LEVEL TROUGH PASSES THROUGH 33N34W
TO A 30N41W CYCLONIC CIRCULATION CENTER...TO 24N41W AND 27N51W.
A SHEAR AXIS CONTINUES FROM 27N51W TO 30N57W. A TROUGH CONTINUES 
FROM 30N57W TO A 25N60W CYCLONIC CIRCULATION CENTER. THE TROUGH
CONTINUES FROM 25N60W TO A 22N69W CYCLONIC CIRCULATION CENTER...
CROSSING HISPANIOLA AND REACHING 15N72W IN THE CARIBBEAN 
SEA...TO 13N73W. CONVECTIVE PRECIPITATION IN THE ATLANTIC 
OCEAN...SCATTERED MODERATE TO STRONG FROM 27N TO 30N BETWEEN
35W AND 40W...ISOLATED MODERATE ELSEWHERE TO THE NORTH OF 30N 
BETWEEN 30W AND 41W AND TO THE NORTH OF 23N BETWEEN 59W AND 
73W...SCATTERED MODERATE TO ISOLATED STRONG FROM THE BAHAMAS 
NEAR 26N TO 30N BETWEEN 73W AND 78W IN AN AREA OF SOME UPPER 
LEVEL DIFFLUENT WIND FLOW. A SURFACE TROUGH PASSES THROUGH 
32N34W TO 30N36W TO 28N42W.

THE REST OF THE CARIBBEAN SEA...

PLEASE READ THE TROPICAL WAVES SECTION FOR MORE DETAILS ABOUT
THE WESTERN CARIBBEAN SEA TROPICAL WAVE THAT IS ALONG 20N84W...
REACHING EASTERN COASTAL HONDURAS NEAR 16N85W...INTO CENTRAL 
NICARAGUA NEAR 13N85W.

AN ATLANTIC OCEAN TROPICAL WAVE IS ALONG 18N59W 13N58W 9N57W. 
BROKEN TO OVERCAST MULTILAYERED CLOUDS AND ISOLATED RAINSHOWERS 
COVER THE ATLANTIC OCEAN AND THE CARIBBEAN SEA FROM 8N TO 19N 
BETWEEN 56W AND 63W. OTHER BROKEN LOW TO MIDDLE LEVEL CLOUDS
AND POSSIBLE RAINSHOWERS ARE BETWEEN 63W AND 73W...WELL TO THE 
WEST OF THE ADVANCING TROPICAL WAVE.

THE MONSOON TROUGH IS ALONG 9N/10N BETWEEN 74W IN COLOMBIA...
BEYOND 83W COSTA RICA. EARLIER SCATTERED MODERATE TO ISOLATED 
STRONG CONVECTIVE PRECIPITATION WAS TO THE SOUTH OF 14N TO THE 
WEST OF 79W. THAT PRECIPITATION WAS OCCURRING IN AN AREA OF 
UPPER LEVEL DIFFLUENT WIND FLOW THAT IS ALONG 13N TO THE WEST
OF 79W. SCATTERED MODERATE TO ISOLATED STRONG CONVECTIVE 
PRECIPITATION IS IN COLOMBIA FROM 7N TO 10N BETWEEN 73W AND 75W.

PLEASE READ THE HIGH SEAS FORECAST...MIAHSFAT2...AND THE 
OFFSHORE FORECAST...MIAOFFNT3...FOR MORE DETAILS ABOUT THE
20 TO 25 KNOT WINDS AND 8 TO 10 FOOT SEA HEIGHTS FROM
11N TO 15N BETWEEN 73W AND 80W.

THE REST OF THE ATLANTIC OCEAN...

A SURFACE RIDGE PASSES THROUGH A 1021 MB HIGH PRESSURE CENTER 
THAT IS NEAR 26N35W AND 26N47W...TO 28N50W TO A SECOND 1021 MB
HIGH PRESSURE CENTER THAT IS NEAR 28N62W...TO SOUTHEASTERN 
FLORIDA. THE RIDGE CONTINUES ACROSS SOUTHEASTERN FLORIDA INTO 
THE GULF OF MEXICO NEAR 25N94W.

PLEASE READ THE HIGH SEAS FORECASTS...MIAHSFAT2...FOR DETAILS 
ABOUT THE 1009 MB LOW PRESSURE CENTER THAT IS NEAR 15N49W...
THAT IS FORECAST TO BE A POSSIBLE TROPICAL CYCLONE NEAR 16N56W 
IN 24 HOURS AND TO BE NEAR 17N63W IN 48 HOURS. A POSSIBLE 
TROPICAL CYCLONE ALSO IS FORECAST IN 48 HOURS TO BE NEAR 11N36W.

FOR ADDITIONAL INFORMATION PLEASE VISIT
WWW.HURRICANES.GOV/MARINE

$$
MT
Marine Weather Discussion



000
AGXX40 KNHC 210657
MIMATS

MARINE WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL
257 AM EDT TUE AUG 21 2012

MARINE WEATHER DISCUSSION FOR THE GULF OF MEXICO...CARIBBEAN SEA 
AND TROPICAL N ATLC...AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W.

GULF OF MEXICO...
A MID TO UPPER LEVEL TROUGH STRETCHES FROM SE LOUISIANA TO JUST 
S OF THE TEXAS/MEXICO BORDER. PLENTIFUL MOISTURE AND UNSTABLE 
AIR CONTINUES TO BE PUMPED UP AHEAD OF THE TROUGH ACROSS THE 
MAJORITY OF THE GULF...EXCEPT BEHIND THE TROUGH IN THE FAR NW 
GULF WHERE DRY AIR AND SUBSIDENCE IS PRESENT. A STATIONARY FRONT 
IS PARKED OUT ALONG THE NW AND N CENTRAL GULF COAST WITH A 
SURFACE TROUGH OUT AHEAD OF IT FROM NEAR THE FLORIDA BID BEND TO 
NEAR 26N95W...COINCIDENT WITH THE MID TO UPPER LEVEL TROUGH. 
THESE FEATURES ARE FORECAST TO EVENTUALLY SLOWLY SHIFT E-SE 
THROUGH MID WEEK...DISSIPATING THU AS HIGH PRES BUILDS IN FROM 
THE NE. A SEPARATE SURFACE TROUGH IS JUST E OF THE MEXICAN COAST 
FROM NEAR 24N97W TO 19N96W. THIS FEATURE IS FORECAST TO LINGER 
OVER THE SAME GENERAL AREA THROUGH THU...MOVING INLAND OVER 
MEXICO FINALLY BY THE END OF THE WEEK AS THE HIGH MENTIONED 
ABOVE PUSHES IN FROM THE NE. THIS TROUGH HAS A MEDIUM 
PROBABILITY OF TROPICAL CYCLONE DEVELOPMENT DURING THE NEXT 48 
HOURS. ALSO...A TROPICAL WAVE CURRENTLY IN THE NW CARIBBEAN MAY 
CLIP THE SW GULF AND MERGE WITH THIS TROUGH LATER THIS WEEK.

THE HIGH WILL RETREAT TO THE NE FRI AND SAT POTENTIALLY ALLOWING 
FOR AN AREA OF LOW PRES AND ATTENDANT TROPICAL WAVE CURRENTLY E 
OF THE CARIBBEAN ISLANDS TO MOVE TOWARD THE SE GULF. THIS LOW 
HAS A HIGH PROBABILITY OF BECOMING A TROPICAL CYCLONE DURING THE 
NEXT 48 HOURS. IF THIS SCENARIO OCCURS...EXPECT DETERIORATING 
CONDITIONS (INCREASING WINDS AND SEAS) IN THE SE GULF LATE SAT 
INTO SUN. AHEAD OF THIS LOW...MAINLY LIGHT TO MODERATE WINDS AND 
2-4 FT SEAS WILL DOMINATE THE GULF...EXCEPT IN THE NE GULF WHERE 
1-3 FT SEAS WILL PREVAIL. 

A BLEND OF THE GFS AND ECMWF WAS USED FOR THIS FORECAST PACKAGE 
ALONG WITH THE PRELIMINARY NHC FORECAST FOR THE LOW THAT MAY 
IMPACT THE SE GULF THIS WEEKEND.

CARIBBEAN SEA AND TROPICAL N ATLC W OF 55W...
A TROPICAL WAVE EXTENDS FROM WESTERN CUBA TO THE GULF OF 
HONDURAS WITH SCATTERED SHOWERS AND ISOLATED TSTMS ACCOMPANYING 
IT. FRESH TO STRONG WINDS ARE PRESENT ACROSS THE CENTRAL 
CARIBBEAN WITH AN AREA OF MODERATE TO FRESH WINDS IN THE W 
CENTRAL CARIBBEAN S OF JAMAICA IN THE LEE OF THE TROPICAL WAVE. 
ANOTHER TROPICAL WAVE IS IN THE TROPICAL N ATLC WATERS NEAR 60W 
AND IT WILL MOVE ACROSS THE E CARIBBEAN ISLANDS LATER TODAY AND 
THROUGH THE E CARIBBEAN TUE NIGHT...THEN THROUGH THE CENTRAL 
CARIBBEAN WED NIGHT THROUGH THU NIGHT...AND INTO THE W CARIBBEAN 
FRI AND SAT. THE FRESH TO STRONG WINDS WILL PERSIST IN THE 
CENTRAL CARIBBEAN THROUGH WED AND E-SE 20-25 KT WINDS WILL SET 
UP OVER THE GULF OF HONDURAS LATER TODAY THROUGH LATE WED AS 
HIGH PRES NE OF THE AREA NOSES INTO THE AREA.

AN AREA OF 1007 MB LOW PRES IS E OF THE TROPICAL N ATLC NEAR 
15N50.5W WITH A TROPICAL WAVE EXTENDING NORTHWARD FROM THE LOW 
CENTER TO 21N47W. CONVECTION IS INCREASING NEAR THIS LOW AND IT 
HAS A VERY HIGH PROBABILITY OF TROPICAL CYCLONE DEVELOPMENT AND 
IT COULD BECOME A TROPICAL DEPRESSION LATER TODAY. 20-30 KT 
WINDS ARE ALREADY OCCURRING IN THE NE SEMICIRCLE OF THE LOW WITH 
A TIGHT PRES GRADIENT IN PLACE BETWEEN THE LOW/TROPICAL WAVE AND 
HIGH PRES TO THE NW. THIS LOW IS FORECAST TO IMPACT THE E 
CARIBBEAN WATERS BY EARLY WED AND INTO THE E CARIBBEAN LATE WED 
AND THU...THEN CENTRAL CARIBBEAN FRI. 

INTERESTS IN THE CARIBBEAN SHOULD CONTINUE TO MONITOR ANY 
DEVELOPMENTS OF THIS LOW THROUGH THE WEEK INTO THE WEEKEND.

SOUTHWEST NORTH ATLC S OF 31N W OF 55W...
1021 MB HIGH PRES IS POSITIONED NEAR 28N62W WITH A RIDGE AXIS 
EXTENDING WESTWARD TO N OF THE CENTRAL BAHAMAS. WEAK TROUGHS 
CONTINUE TO MOVE ACROSS THE NW PORTION OF THE REGION HELPING TO 
SPARK SCATTERED SHOWERS AND TSTMS. RECENT SCATTEROMETER DATA 
INDICATES PRIMARILY LIGHT TO MODERATE ANTICYCLONIC WINDS ACROSS 
THE SW N ATLC. THE EXCEPTION IS ACROSS THE WATERS S OF 22N WHERE 
EASTERLY 15-20 KT WINDS ARE PRESENT. WINDS WILL INCREASE AND 
SEAS WILL BUILD BEGINNING IN AMZ125 LATER TODAY...SPREADING W-NW 
AS A DEVELOPING AREA OF 1007 MB LOW PRES CURRENTLY NEAR 15N50.5W 
MOVES CLOSER TO THE SOUTHERN WATERS. THIS FEATURE HAS A VERY 
HIGH PROBABILITY OF TROPICAL CYCLONE DEVELOPMENT AND IT COULD 
BECOME A TROPICAL DEPRESSION LATER TODAY. THE LOW IS EXPECTED TO 
IMPACT THE NE CARIBBEAN BY LATE WED...THEN POTENTIALLY THE 
GREATER ANTILLES BY THE END OF THE WEEK. REGARDLESS OF THE EXACT 
TRACK...A TIGHT PRES GRADIENT WILL REMAIN OVER THE SOUTHERN 
WATERS BETWEEN THE HIGH...WHICH WILL BE RETREATING NORTHWARD... 
AND THE LOW.

INTERESTS FROM THE NE CARIBBEAN TO ACROSS THE GREATER 
ANTILLES...TURKS AND CAICOS...AND THE BAHAMAS SHOULD CONTINUE TO 
MONITOR ANY DEVELOPMENTS OF THIS LOW THROUGH THE WEEK INTO THE 
WEEKEND.

NOTE...GRIDDED MARINE FORECAST IS AVAILABLE AT 
WWW.NHC.NOAA.GOV/TAFB/GRIDDED_MARINE

GULF OF MEXICO...
.NONE.

CARIBBEAN SEA...
.NONE.

SW N ATLANTIC...
.NONE.

FOR ADDITIONAL INFORMATION PLEASE VISIT
WWW.HURRICANES.GOV/MARINE

$$
FORECASTER LEWITSKY
High Seas Forecast (Atlantic)



000
FZNT02 KNHC 210253
HSFAT2

HIGH SEAS FORECAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
0430 UTC TUE AUG 21 2012

SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS

SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE 
HEIGHT OF THE HIGHEST 1/3 OF THE WAVES. INDIVIDUAL WAVES MAY BE 
MORE THAN TWICE THE SIGNIFICANT WAVE HEIGHT.

SECURITE

ATLANTIC FROM 07N TO 31N W OF 35W INCLUDING CARIBBEAN SEA AND 
GULF OF MEXICO

SYNOPSIS VALID 0000 UTC TUE AUG 21
24 HOUR FORECAST VALID 0000 UTC WED AUG 22
48 HOUR FORECAST VALID 0000 UTC THU AUG 23

.WARNINGS.

.NONE.

.SYNOPSIS AND FORECAST.

.ATLC LOW PRES NEAR 15N49W 1009 MB WITH TROPICAL WAVE N TO 21N. 
WITHIN 240 NM N SEMICIRCLE OF LOW WINDS 20 TO 25 KT. SEAS 8 TO 10
FT. ELSEWHERE FROM 16N TO 21N BETWEEN 42W AND 51W WINDS 20 KT OR 
LESS. SEAS TO 9 FT IN E SWELL.
.24 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
16N56W 1007 MB. WITHIN 300 NM N SEMICIRCLE OF LOW WINDS 20 TO 30 
KT. SEAS 9 TO 12 FT. ELSEWHERE FROM 16N TO 22N BETWEEN 48W AND 
58W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN E SWELL.
.48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE...NEAR 
17N63W 1005 MB. WITHIN 360 NM NE SEMICIRCLE OF LOW WINDS 20 TO 30
KT. SEAS 10 TO 13 FT. WITHIN 60 NM OF LINE 19N56W TO 14N51W SE 
WINDS 20 TO 25 KT. SEAS TO 9 FT. ELSEWHERE FROM 16N TO 23N 
BETWEEN 55W AND 65W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT IN E 
SWELL.

.ATLC 48 HOUR FORECAST LOW PRES...POSSIBLE TROPICAL CYCLONE... 
NEAR 11N36W 1011 MB. WITHIN 60 NM N SEMICIRCLE OF LOW WINDS 20 
TO 25 KT. SEAS TO 9 FT.

.CARIBBEAN FROM 12N TO 15N BETWEEN 73W AND 78W NE TO E WINDS 20 
TO 25 KT. SEAS TO 8 FT.
.24 HOUR FORECAST FROM 11N TO 15N BETWEEN 74W AND 80W NE TO E 
WINDS 20 TO 25 KT. SEAS 8 TO 10 FT.
.48 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

.REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT.

$$
.FORECASTER MUNDELL. NATIONAL HURRICANE CENTER.