000 WTNT23 KNHC 311436 TCMAT3 TROPICAL STORM FIONA FORECAST/ADVISORY NUMBER 4 NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL AL082010 1500 UTC TUE AUG 31 2010 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WARNING IS IN EFFECT FOR... * ST. MARTIN AND ST. BARTHELEMY A TROPICAL STORM WATCH IS IN EFFECT FOR... * ANTIGUA...BARBUDA...MONTSERRAT...ST. KITTS...NEVIS...AND ANGUILLA * ST. MAARTEN...SABA...AND ST. EUSTATIUS A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA WITHIN 36 HOURS. A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...IN THIS CASE WITHIN 36 HOURS. INTERESTS ELSEWHERE IN THE NORTHERN LEEWARD ISLANDS SHOULD MONITOR THE PROGRESS OF FIONA. ADDITIONAL WATCHES OR WARNINGS MAY BE REQUIRED FOR A PORTION OF THIS AREA LATER TODAY. TROPICAL STORM CENTER LOCATED NEAR 15.9N 55.3W AT 31/1500Z POSITION ACCURATE WITHIN 45 NM PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 285 DEGREES AT 21 KT ESTIMATED MINIMUM CENTRAL PRESSURE 1006 MB MAX SUSTAINED WINDS 35 KT WITH GUSTS TO 45 KT. 34 KT.......120NE 0SE 0SW 0NW. 12 FT SEAS..120NE 0SE 0SW 75NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 15.9N 55.3W AT 31/1500Z AT 31/1200Z CENTER WAS LOCATED NEAR 15.8N 54.4W FORECAST VALID 01/0000Z 16.9N 58.2W MAX WIND 40 KT...GUSTS 50 KT. 34 KT...120NE 0SE 0SW 45NW. FORECAST VALID 01/1200Z 18.7N 61.3W MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 90NE 0SE 0SW 45NW. FORECAST VALID 02/0000Z 21.1N 63.8W MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 90NE 45SE 30SW 45NW. FORECAST VALID 02/1200Z 23.4N 65.8W MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 90NE 45SE 30SW 45NW. FORECAST VALID 03/1200Z 27.7N 67.8W MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 80NE 60SE 45SW 60NW. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 200 NM ON DAY 4 AND 250 NM ON DAY 5...AND FOR INTENSITY NEAR 20 KT EACH DAY OUTLOOK VALID 04/1200Z 31.0N 67.5W MAX WIND 45 KT...GUSTS 55 KT. OUTLOOK VALID 05/1200Z 34.0N 66.0W MAX WIND 45 KT...GUSTS 55 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 15.9N 55.3W NEXT ADVISORY AT 31/2100Z $$ FORECASTER BROWN