000
FZNT32 KNHC 240331
OFFN21

MARINE WEATHER HF VOICE BROADCAST
NWS NATIONAL HURRICANE CENTER MIAMI FL
1131 PM EDT THU AUG 23 2012

MARINE WEATHER HF VOICE BROADCAST FOR THE GULF OF MEXICO.

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.

SYNOPSIS FOR THE GULF OF MEXICO

.SYNOPSIS...A SURFACE RIDGE AXIS EXTENDS FROM 1019 MB HIGH PRES 
OVER THE NE GULF SW TO THE WESTERN GULF. THE RIDGE IS EXPECTED 
TO SLIDE NORTHWARD AS TROPICAL STORM ISAAC...CURRENTLY WELL SE 
OF THE GULF...IS FORECAST TO MOVE NW ACROSS THE STRAITS OF 
FLORIDA LATE SUN THEN ACROSS THE WESTERN FLORIDA KEYS SUN 
EVENING AND INTO THE SE GULF...WHERE IT IS EXPECTED TO INTENSIFY 
TO HURRICANE FORCE...REACHING NEAR 27.5N 85.5W MON EVENING...TEN 
CONTINUE NNW TUE.

GULF OF MEXICO N OF 26N W OF 87W

.OVERNIGHT...SE TO S WINDS 10 TO 20 KT. SEAS 3 TO 5 FT. 
.FRI...SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. 
.FRI NIGHT THROUGH MON...TROPICAL STORM CONDITIONS POSSIBLE. NE
WINDS 25 TO 35 KT. SEAS 5 TO 7 FT. 
.MON NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. N TO NE WINDS
30 TO 40 KT...BECOMING N 35 TO 45 KT AFTER MIDNIGHT. SEAS 8 TO
11 FT. 
.TUE...HURRICANE CONDITIONS POSSIBLE. N TO NW WINDS 65 TO
75 KT...BECOMING NW 70 TO 80 KT IN THE AFTERNOON. SEAS 12 TO
17 FT. 

GULF OF MEXICO FROM 22N TO 26N W OF 87W

.OVERNIGHT...NE TO E WINDS 10 TO 15 KT. SEAS 4 TO 6 FT. 
.FRI...E TO SE WINDS 10 TO 20 KT...BECOMING 10 TO 15 KT IN THE
AFTERNOON. SEAS 3 TO 5 FT. 
.FRI NIGHT THROUGH SUN NIGHT...NE TO E WINDS 10 TO 20 KT. SEAS
4 TO 6 FT. 
.MON THROUGH TUE...TROPICAL STORM CONDITIONS POSSIBLE. NW WINDS
25 TO 35 KT. SEAS 8 TO 11 FT. 

SW GULF OF MEXICO S OF 22N W OF 87W

.OVERNIGHT...NE WINDS 10 TO 15 KT. SEAS 4 TO 6 FT. 
.FRI...E TO SE WINDS 10 TO 15 KT...EXCEPT E LESS THAN 10 KT
WITHIN 60 NM OF COAST OF VERACRUZ. SEAS 3 TO 5 FT. 
.FRI NIGHT THROUGH SUN NIGHT...NE WINDS 10 TO 20 KT. SEAS 3 TO
5 FT. 
.MON THROUGH TUE...NW WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. 

GULF OF MEXICO E OF 87W

.OVERNIGHT...NE TO E WINDS 15 TO 25 KT. SEAS 3 TO 5 FT. 
.FRI...NE TO E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT. 
.FRI NIGHT AND SAT...NE TO E WINDS 10 TO 20 KT. SEAS 4 TO 6 FT. 
.SAT NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. NE TO E WINDS
20 TO 30 KT...INCREASING TO 25 TO 35 KT AFTER MIDNIGHT. SEAS
5 TO 7 FT. 
.SUN AND SUN NIGHT...TROPICAL STORM CONDITIONS POSSIBLE. N WINDS
50 TO 60 KT. SEAS 7 TO 10 FT. 
.MON THROUGH TUE...HURRICANE CONDITIONS POSSIBLE.