000 FZPN03 KNHC 161531 HSFEP2 HIGH SEAS FORECAST NWS NATIONAL HURRICANE CENTER MIAMI FL 1630 UTC THU MAY 16 2013 SUPERSEDED BY NEXT ISSUANCE IN 6 HOURS SEAS GIVEN AS SIGNIFICANT WAVE HEIGHT...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES.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 E PACIFIC FROM THE EQUATOR TO 30N E OF 140W. SYNOPSIS VALID 1200 UTC THU MAY 16. 24 HOUR FORECAST VALID 1200 UTC FRI MAY 17. 48 HOUR FORECAST VALID 1200 UTC SAT MAY 18. .WARNINGS. ...TROPICAL STORM WARNING... .TROPICAL STORM ALVIN NEAR 9.4N 107.7W 1003 MB AT 1500 UTC MAY 16 MOVING WNW OR 290 DEG AT 8 KT. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. TROPICAL STORM FORCE WINDS WITHIN 40 NM OF CENTER EXCEPT 0 NM SW QUADRANT. SEAS 12 FT OR GREATER WITHIN 90 NM N SEMICIRCLE AND 30 NM S SEMICIRCLE WITH SEAS TO 22 FT. ELSEWHERE WITHIN 180 NM NE QUADRANT...210 NM SE QUADRANT...150 NM SW AND AND 75 NM NW QUADRANTS OF CENTER WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. .24 HOUR FORECAST TROPICAL STORM ALVIN NEAR 10.7N 110.5W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 70 NM NE QUADRANT...50 NM SE QUADRANT...30 NM SW QUADRANT...AND 60 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 180 NM NE SEMICIRCLE AND 150 NM SW SEMICIRCLE OF CENTER WITH SEAS TO 24 FT. ELSEWHERE WITHIN 210 NM E SEMICIRCLE...AND 120 NM W SEMICIRCLE OF CENTER WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. .48 HOUR FORECAST TROPICAL STORM ALVIN NEAR 11.6N 113.6W. MAXIMUM SUSTAINED WINDS 50 KT GUSTS 60 KT. TROPICAL STORM FORCE WINDS WITHIN 80 NM NE QUADRANT...60 NM SE QUADRANT...40 NM SW QUADRANT...AND 70 NM NW QUADRANT. SEAS 12 FT OR GREATER WITHIN 180 NM E SEMICIRCLE AND SW QUADRANT...AND WITHIN 210 NM NW QUADRANT OF CENTER WITH SEAS TO 24 FT. ELSEWHERE WITHIN 180 NM E SEMICIRCLE AND NW QUADRANT...AND 120 NM SW QUADRANT WINDS 20 TO 33 KT. SEAS 8 TO 12 FT. REMAINDER OF AREA S OF 17N BETWEEN 106W AND 121W WINDS 20 KT OR LESS. SEAS 8 TO 10 FT PRIMARILY IN SW SWELL...EXCEPT IN MIXED SWELL AROUND PERIPHERY OF 20 TO 33 KT WINDS. .72 HOUR FORECAST TROPICAL STORM ALVIN NEAR 13.0N 116.0W. MAXIMUM SUSTAINED WINDS 45 KT GUSTS 55 KT. EXTENDED OUTLOOK...USE FOR GUIDANCE ONLY...ERRORS MAY BE LARGE. .96 HOUR FORECAST TROPICAL DEPRESSION ALVIN NEAR 13.5N 118.5W. MAXIMUM SUSTAINED WINDS 30 KT GUSTS 40 KT. .120 HOUR FORECAST POST-TROPICAL REMNANT LOW ALVIN NEAR 13.5N 120.5W. MAXIMUM SUSTAINED WINDS 25 KT GUSTS 35 KT. FORECAST WINDS IN AND NEAR ACTIVE TROPICAL CYCLONES SHOULD BE USED WITH CAUTION DUE TO UNCERTAINTY IN FORECAST TRACK...SIZE AND INTENSITY .SYNOPSIS AND FORECAST .N OF 07N BETWEEN 78W AND 80W S TO SW WINDS 20 TO 25 KT. SEAS LESS THAN 8 FT. .12 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. .FROM 10N TO 12N E OF 88W...INCLUDING THE GULF OF PAPAGAYO...NE TO E WINDS TO 20 KT. SEAS LESS THAN 8 FT. .06 HOUR FORECAST WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. .18 HOUR FORECAST FROM 13N TO 20N W OF 137W WINDS 20 KT OR LESS. SEAS 8 FT IN SW SWELL. .24 HOUR FORECAST LITTLE CHANGE. .48 HOUR FORECAST FROM 13N TO 18N W OF 136W WINDS 20 KT OR LESS. SEAS TO 9 FT IN SW SWELL. .REMAINDER OF AREA WINDS 20 KT OR LESS. SEAS LESS THAN 8 FT. CONVECTION VALID 1515 UTC THU MAY 16... .TROPICAL STORM ALVIN...NUMEROUS MODERATE TO STRONG WITHIN 210 NM SE QUADRANT. SCATTERED MODERATE ISOLATED STRONG WITHIN 120 NM NE AND 60 NM NW QUADRANTS. .INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... MONSOON TROUGH AXIS 07N76W TO LOW PRES NEAR 07N78W 1009 MB TO 07N1101W...THEN RESUMES FROM 08N110W TO 06N131W...THEN ITCZ TO 06N140W. SCATTERED STRONG WITHIN 180 NM OF THE AXIS BETWEEN 110W AND 117W. SCATTERED MODERATE ISOLATED STRONG WITHIN 90 NM OF THE AXIS BETWEEN 120W AND 126W...WITHIN 180 NM N OF THE AXIS BETWEEN 130W AND 137W AND N OF 05N E OF 81W. SCATTERED MODERATE WITHIN 150 NM S OF THE AXIS BETWEEN 91W AND 95W. $$ .FORECASTER AGUIRRE. NATIONAL HURRICANE CENTER.