Special Features

Caribbean Sea Gale Warning: The pressure gradient between high pressure N of the area and the Colombian low will continue to support strong to near gale-force NE to E winds and rough to very rough seas across the south-central and portions of the SW Caribbean through at least Sat. Winds will pulse to gale-force over these waters at night with the added component of nocturnal drainage flow.

Central and Eastern Atlantic Significant Swell Event: A previous gale force wind event off the Canary Islands generated a large NE swell with very rough seas to 13 ft. The swell has propagated from this source region, with the very rough seas currently over the waters from 14N to 20N between 40W and 50W. These seas will gradually subside from east to west through Tue night. Rough seas are then forecast to subside E of the Lesser Antilles this weekend.

Please read the latest NWS High Seas Forecast issued by the National Hurricane Center at website: https://www.nhc.noaa.gov/text/MIAHSFAT2.shtml for more information.

Monsoon Trough/ITCZ

The monsoon trough enters the Atlantic near 05N08W to 02N13W. The ITCZ extends from that point to the coast of Brazil near 06S35W. Scattered moderate convection is noted S of 04N and E of 35W.

Gulf Of America

A surface trough is analyzed in the eastern Gulf along 87W with isolated thunderstorms near it. Moderate to fresh E to SE winds are east of the trough, with gentle to moderate or weaker winds elsewhere across the Gulf. Slight seas prevail across the basin.

For the forecast, high pressure will extend from the N central Atlantic southwestward across the region through the week. The resultant pressure gradient will continue supporting moderate to fresh east to southeast winds across the Gulf, except in the Bay of Campeche where winds will be moderate northeast to east. Fresh to strong winds will occur nocturnally off the northern Yucatan Peninsula starting Tue.

Caribbean Sea

Please see Special Features section above regarding a Gale Warning in the south-central Caribbean.

Surface ridging from strong high pressure centers N of the area will support fresh to near-gale winds over the eastern and central Caribbean, and moderate to fresh NE winds in the lee side of Cuba. Seas in the regions of highest winds are moderate, except for rough seas in the central Caribbean and near NE and E Caribbean- Atlantic passages.

For the forecast, the broad area of high pressure over the central Atlantic will continue to support fresh to near gale- force trades along with moderate to rough seas across the central and eastern Caribbean through Sat night. Winds off Colombia will pulse to gale-force during the nocturnal hours through the weekend. Fresh to strong northeast winds in the Windward Passage and in the lee of Cuba will continue to pulse through the forecast period. In the Gulf of Honduras, fresh to strong winds will begin to pulse at night from Thu through Sat. Elsewhere, rough to very rough seas in wind generated east swell over the tropical N Atlantic will begin to slowly subside on Thu.

Atlantic Ocean

Please see Special Features above for information on a significant swell event.

A strong Azores high extending a ridge into the deep tropical waters continues to support a broad area of fresh to strong NE to E winds and rough to very rough seas from the coast of W Africa all the way to the Lesser Antilles and between the ITCZ and 27N. Northwest of the Canary Islands, a cold front brings fresh to strong N to NE winds and rough seas in NW swell. Lastly, a weak stationary front extends from 31N59W southwestward to 27N71W. Scattered showers and thunderstorms prevail along and E of the front. Moderate to fresh NE winds and moderate seas follow the front.

For the forecast west of 55W, the stationary front will become diffuse Tue evening. Fresh to strong northeast to east winds along with rough to very rough seas behind the front will diminish Tue night. However, seas will linger into Wed while expanding southeastward and merging with similar seas south of 25N east of Bahamas. Strong high pressure will become centered over the western N Atlantic through the next few days. It will be the main feature controlling the general flow wind pattern across the region, with fresh to strong east winds confined to mostly south of 25N.

Posted 2 hours ago by NHC Forecaster Era