000 FZNT32 KNHC 180807 OFFN21 MARINE WEATHER HF VOICE BROADCAST NWS NATIONAL HURRICANE CENTER MIAMI FL 407 AM EDT TUE AUG 18 2015 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...HIGH PRESSURE RIDGE BUILDING FROM W ATLC ACROSS THE N GULF WILL PREVAIL THROUGH FRI. A THERMALLY INDUCED TROUGH WILL DEVELOP EACH EVENING OVER THE YUCATAN. THE TROUGH WILL DRIFT WESTWARD INTO THE SW GULF DURING THE OVERNIGHT HOURS AND DISSIPATE EACH MORNING OVER THE SW GULF. GULF OF MEXICO N OF 26N W OF 87W .TODAY...S WINDS 10 TO 15 KT. SEAS 3 FT. .TONIGHT...SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. .WED...SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. .WED NIGHT...SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. .THU...SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. .THU NIGHT...SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. .FRI...SE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. .FRI NIGHT...SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. .SAT...SE WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. .SAT NIGHT...E WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. GULF OF MEXICO FROM 22N TO 26N W OF 87W .TODAY...SE WINDS 10 TO 15 KT. SEAS 3 TO 4 FT. .TONIGHT...SE WINDS 10 TO 20 KT. SEAS 3 TO 5 FT. .WED...SE WINDS 10 TO 20 KT. SEAS 3 TO 5 FT. .WED NIGHT...SE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT. .THU...SE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT. .THU NIGHT...SE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT. .FRI...SE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT. .FRI NIGHT...E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT. .SAT...SE WINDS 10 TO 20 KT. SEAS 4 TO 6 FT. .SAT NIGHT...E WINDS 10 TO 15 KT. SEAS 3 TO 5 FT. SW GULF OF MEXICO S OF 22N W OF 87W .TODAY...SE WINDS 10 TO 20 KT. SEAS 3 TO 5 FT. .TONIGHT...E WINDS 10 TO 20 KT. SEAS 3 TO 4 FT. .WED...SE WINDS 10 TO 20 KT. SEAS 3 TO 5 FT. .WED NIGHT...E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT. .THU...SE WINDS 10 TO 20 KT. SEAS 3 TO 5 FT. .THU NIGHT...E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT. .FRI...SE WINDS 10 TO 20 KT. SEAS 3 TO 5 FT. .FRI NIGHT...E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT. .SAT...SE WINDS 10 TO 20 KT. SEAS 3 TO 5 FT. .SAT NIGHT...E WINDS 10 TO 20 KT. SEAS 3 TO 5 FT. GULF OF MEXICO E OF 87W .TODAY...SE WINDS 10 TO 15 KT...DIMINISHING TO LESS THAN 10 KT IN THE AFTERNOON. SEAS 2 FT OR LESS. .TONIGHT...SE WINDS LESS THAN 10 KT...INCREASING TO 10 TO 15 KT LATE. SEAS 2 FT OR LESS. .WED...SE WINDS 10 TO 15 KT. SEAS 2 FT OR LESS. .WED NIGHT...SE WINDS 10 KT. SEAS 2 FT OR LESS. .THU...SE WINDS 10 KT. SEAS 2 FT OR LESS. .THU NIGHT...E WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS. .FRI...E WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS. .FRI NIGHT...NE WINDS 10 TO 15 KT. SEAS 2 FT OR LESS. .SAT...NE WINDS LESS THAN 10 KT. SEAS 2 FT OR LESS. .SAT NIGHT...NE WINDS 10 TO 15 KT. SEAS 2 FT OR LESS.