Special Features

Western and Central Atlantic Gale Warnings/Significant Swell: A cold front is analyzed from near 31N63W to 27N75W and to across South Florida. Combined seas with northwest swell behind the front is resulting in seas of 16 to 28 ft primarily north of 26N west of the front to near 76W as noted in the latest available Sofar Ocean Spotter buoys and in altimeter satellite passes over that part of the Atlantic. Gale-force west to northwest winds of 30 to 40 kt are behind the front to near 74W and north of 27N as seen in the latest scatterometer satellite data passes, and gale- force southwest winds of 30 to 35 kt are ahead of the front to near 57W and north of 27N. Seas with these winds are 18 to 27 ft in west to northwest swell. Widespread gale-force to near storm- force winds will impact waters north of 27N and east of 76W through Sun night, as it reaches from near 31N49W to the northern Leeward Islands Sun morning, then begins to weaken from 31N44W to the central Leewards Tue. Gale-force winds behind the front will shift NE of the northeastern zones late Mon. Very rough seas generated by these winds will propagate SE and impact much of the waters into early next week, with peak seas of 30 to 35 ft possible from 30N to Bermuda on Sun. The very rough seas are likely to finally depart the region to the east on Wed.

Please read the latest High Seas and Offshore Waters Forecasts issued by the National Hurricane Center at website: https: //www. nhc. noaa. gov/text/MIAHSFAT2. shtml and https: //www. nhc. noaa. gov/marine/offshores. php for more details on these events.

Monsoon Trough Itcz

The monsoon trough axis enters the Atlantic through the coast of Liberia near 06. 5N11W and extends southwestward to near 06N16W, where it transitions to the ITCZ to 03N25W and to 01S40W. Scattered moderate convection is within 60 nm north of the ITCZ between 26W-32W.

Gulf Of America

A 1026 mb high is located near 22N94W. This feature continues to dominate the wind flow pattern over the entire basin. Moderate northwest to north winds along with moderate seas are over the north-central and eastern Gulf, including the Florida Straits. Gentle winds and slight seas prevail for the rest of the Gulf.

For the forecast, the 1026 mb high will drift to the northeast, and continue to dominate the wind flow regime through the middle of the upcoming week, bringing generally quiescent conditions to the basin. The moderate northwest to north winds that are over the north- central and eastern Gulf will gradually diminish and veer to the northeast through Sun morning.

Caribbean Sea

A cold front extends from Puerto Rico southwestward to near 18N67W, where it transitions to a stationary front to 17N74W and south-southwestward to near 09N77W. Fresh to strong north winds are west of the front to 82W and south of 20N. Seas with these winds are in the range of 7 to 10 ft, with the highest of the seas noted near 10N81W. Seas are 4 to 6 ft elsewhere west of the front, except for slightly higher seas of 5 to 7 ft south of 20N. To the east of the front, a trough extends from near 19N64W southwestward to 15N70W and continues to near low pressure of 1013 mb situated over northern Colombia near 11N74W. The trades east of the front and trough are of gentle to moderate speeds, with slight seas.

Isolated showers are over some sections of the eastern part of the basin.

For the forecast, a weakening cold front has stalled from western Puerto Rico to offshore of southwest Haiti near 17. 5N73W to near the coast of NW Colombia and the Gulf of Uraba. The front will drift SE across the central Leeward Islands through Tue then gradually dissipate. Strong north winds and rough seas will prevail across the southwestern part of the sea behind the front, through Sun. In the wake of the front, fresh to strong trades will develop offshore Colombia and Hispaniola Sun night, then increase and expand through the central basin into the middle of next week, as high pressure builds N of the area. Rough seas will develop in this area of strong winds. Additionally, large northwest to north Atlantic swell will impact the Mona Passage, Anegada Passage, and tropical N Atlantic waters Sun night through Wed.

Atlantic Ocean

Please see the Special Features section for details on Gale Warnings and areas of significant swell in the western and central Atlantic.

Outside of the Special Feature warning areas, a cold front is over the central Atlantic extending from near 31N46W to 25N55W and continuing southwestward to Puerto Rico. Latest scatterometer satellite data passes indicate fresh to strong southwest winds ahead of this front north of about 24N, to near a line from 31N36W to 24N49W. Southwest winds to near gale force are north of 28N. Seas over these waters are in the range of 8 to 12 ft, except for higher seas of 10 to 15 ft north of 26N. The cold front that is over the western Atlantic along a position from near 31N63W to 27N75W and to across South Florida, as described above under the Special Features section, will merge with this front early on Sun.

Elsewhere in the Atlantic, moderate to fresh trades dominate the waters south of of 22N and east of 60W, with fresh to strong trades occurring from 16N to 25N and east of 25W as noted in the latest scatterometer satellite data passes. Rough seas are impacting much of the waters east of about 40W and south of 21N, and also south of 11N east of 51W. Gentle to moderate winds along with moderate seas remain elsewhere.

For the forecast W of 55W, see the Special Features section above. Otherwise, in the wake of the Special Features front and associated wind and sea conditions, high pressure will build from west to east roughly along 28N into the middle part of the upcoming week. Posted 11 minutes ago by NHC Forecaster Aguirre