000
FZNT24 KNHC 171520
OFFNT4

OFFSHORE WATERS FORECAST FOR THE GULF OF MEXICO 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1030 AM CDT FRI SEP 17 2010

OFFSHORE WATERS FORECAST 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. 

GMZ089-171530-
SYNOPSIS FOR THE GULF OF MEXICO
1030 AM CDT FRI SEP 17 2010

.SYNOPSIS...HURRICANE KARL NEAR 19.4N 95.9W AT 900 AM CDT MOVING 
W OR 260 DEG AT 7 KT. MAXIMUM SUSTAINED WINDS 105 KT GUSTS 130 
KT. KARL IS EXPECTED MAKE LANDFALL THIS AFTERNOON NEAR 19.7N 
96.3W. KARL WILL WEAKEN AS IT MOVES INLAND TO NEAR 19.2N 96.9W 
THIS EVENING...THEN WEAKEN FURTHER TO TROPICAL STORM STRENGTH AS 
IT MOVES NEAR 19.1N 98.2W BY EARLY SAT MORNING. KARL WILL WEAKEN 
TO A TROPICAL DEPRESSION BY SAT AFTERNOON AND WILL DISSIPATE BY 
LATE SUN. HIGH PRES WILL BUILD ACROSS THE GULF IN THE WAKE OF 
KARL.

$$
GMZ080-171530-
NW GULF N OF 25N W OF 90W 
INCLUDING THE FLOWER GARDEN BANKS NATIONAL MARINE SANCTUARY 
1030 AM CDT FRI SEP 17 2010

.THIS AFTERNOON THROUGH SAT NIGHT...NE TO E WINDS 15 TO 20 KT. 
SEAS 4 TO 6 FT BUILDING TO 5 TO 7 FT TONIGHT THROUGH SAT NIGHT. 
SCATTERED SHOWERS AND ISOLATED TSTMS THIS AFTERNOON AND TONIGHT.
.SUN THROUGH TUE...E WINDS 15 KT BECOMING E TO SE MON AND TUE.
SEAS 4 TO 6 FT.

$$
GMZ082-171530-
SW GULF S OF 25N W OF 90W
1030 AM CDT FRI SEP 17 2010

...HURRICANE WARNING S OF 21N W OF 94W...

.THIS AFTERNOON AND TONIGHT...HURRICANE AND TROPICAL STORM FORCE 
WINDS WITHIN 80 NM OF THE CENTER OF KARL. HIGHEST WINDS 105 KT 
GUSTS 130 KT. SEAS 12 FT OR GREATER WITHIN AREA OF TROPICAL 
STORM AND HURRICANE FORCE WINDS WITH HIGHEST SEAS 24 FT BUILDING 
TO 27 FT PRIOR TO LANDFALL. ELSEWHERE WITHIN 240 NM OF CENTER 
WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA   WINDS 15 
TO 20 KT. SEAS 5 TO 7 FT. NUMEROUS SQUALLS WITHIN 150 NM OF 
CENTER.
.SAT AND SAT NIGHT...W OF 94W WINDS 20 TO 33 KT...BECOMING NE TO 
E 10 TO 15 KT W OF TROUGH AND E TO SE 10 TO 15 KT E OF TROUGH 
SAT NIGHT. SEAS 8 TO 12 FT SUBSIDING TO 4 TO 7 FT SAT NIGHT. E 
OF 94W E TO SE WINDS 15 TO 20 KT BECOMING NE TO E 10 TO 15 KT 
SAT NIGHT. SEAS 5 TO 7 FT SUBSIDING TO 3 TO 5 FT SAT NIGHT.
.SUN...E TO SE WINDS 10 TO 15 KT EXCEPT N TO NE 15 KT NEAR 
YUCATAN COAST DURING THE EVENING...AND EXCEPT VARIABLE 5 TO 10 
KT W OF TROUGH THROUGHOUT. SEAS 3 TO 5 FT.
.MON AND TUE...N OF 21N E TO SE WINDS 15 KT. SEAS 4 TO 6 FT. S 
OF 21N VARIABLE WINDS 5 TO 10 KT. SEAS 2 TO 4 FT IN NE SWELL.

$$
GMZ084-171530-
MIDDLE GULF BETWEEN 85W AND 90W 
1030 AM CDT FRI SEP 17 2010

.THIS AFTERNOON AND TONIGHT...E WINDS 10 TO 15 KT. SEAS 3 TO 5 
FT.
.SAT THROUGH TUE...NE TO E WINDS 15 KT BECOMING E TO SE 15 TO 20 
KT TUE. SEAS 4 TO 6 FT BUILDING TO 5 TO 7 FT TUE.

$$
GMZ086-171530-
E GULF BETWEEN 81W AND 85W
1030 AM CDT FRI SEP 17 2010

.THIS AFTERNOON AND TONIGHT...E WINDS 10 TO 15 KT. SEAS 3 TO 5 
FT. 
.SAT THROUGH TUE...NE TO E WINDS 15 TO 20 KT EXCEPT 20 TO 25 KT 
STRAITS OF FLORIDA MON AND TUE. SEAS 4 TO 6 FT EXCEPT TO 8 FT 
STRAITS OF FLORIDA MON AND TUE.

$$
FORECASTER LEWITSKY/CHRISTENSEN