• TROPDISC: Atlantic Gale Warning

    From Mike Powell@1:2320/106 to All on Sun Apr 12 10:41:30 2026
    938
    AXNT20 KNHC 121034
    TWDAT

    Tropical Weather Discussion
    NWS National Hurricane Center Miami FL
    1215 UTC Sun Apr 12 2026

    Tropical Weather Discussion for North America, Central America
    Gulf of Mexico, Caribbean Sea, northern sections of South
    America, and Atlantic Ocean to the African coast from the
    Equator to 31N. The following information is based on satellite
    imagery, weather observations, radar and meteorological analysis.

    Based on 0600 UTC surface analysis and satellite imagery through 1015 UTC.

    ...SPECIAL FEATURE...

    Gale Warning E of 35W: Meteo-France has issued Gale Warnings for
    the marine zones of Agadir through 13/12Z, and Tarfaya from 12/15Z
    through 13/12Z. Please refer to the Meteo-France High Seas Forecast
    product, listed on the website at https://wwmiws.wmo.int
    for more information.

    ...MONSOON TROUGH/ITCZ...

    The monsoon trough axis enters the Atlantic near the coastal
    border Gambia and southern Senegal, then extends southwestward to
    03N25W, where it transitions to the ITCZ to the Equator at 30W and
    continues to 03S38W and to near Sao Luis, Brazil. Scattered
    moderate to isolated strong convection is from the Equator to
    04N between 23W and 27W. Scattered moderate convection is
    within 120 nm northwest of the ITCZ between 25W and 34W, and
    within 90 nm north of the ITCZ between 34W and 39W.

    ...GULF OF MEXICO...

    A broad ridge extends from a 1025 mb high center that is offshore
    the Carolinas southwestward to the western Gulf. The related
    gradient is generally allowing for mostly fresh easterly winds
    across the basin. Both buoy observations and recent altimeter
    satellite data indicate seas of 4 to 6 ft over the basin. Higher
    seas of 7 to 10 ft are in the Straits of Florida, where strong
    northeast to east winds are present. Much lower seas of 1 to 3 ft
    are in the far northeast Gulf, where light to gentle east winds exist.

    For the forecast, the high pressure center off the Carolinas will
    begin to slide eastward into the western Atlantic starting this
    evening. A ridge will extend southwestward from the high to the
    north-central Gulf through the forecast period. The related gradient
    will maintain moderate to fresh east winds across the basin through
    Wed. Afterward, the high pressure will be weakening allowing for
    winds over the area to diminish to gentle to moderate speeds.
    Pulsing fresh to strong east winds will surge through the Straits of
    Florida and into the southeastern Gulf starting today.
    Seas across the basin will be at a mostly moderate state, except
    reaching a rough state, at times, in the Straits of Florida
    beginning on Mon. Seas subside around midweek.

    ...CARIBBEAN SEA...

    Overnight scatterometer satellite data shows fresh to strong
    northeast winds south of about 15N between 72W and 79W and in the
    Gulf of Venezuela. Seas are to 8 ft with these winds. The
    scatterometer satellite data also shows a swath of fresh to
    strong northeast winds in the lee of Cuba and through the Windward
    Passage. Moderate to fresh trades are elsewhere south of 16N east of
    75W and also west of 80W. Seas are 4 to 6 ft with these trades.
    Lighter trades of gentle speeds are north of 16N east of 75W and
    just south of Jamaica. Gentle to moderate trades are in the Gulf of
    Honduras, where seas are 3 to 5 ft.

    Convergent trades are helping to sustain scattered showers and
    thunderstorms along and offshore the coast of Costa Rica.

    For the forecast, high pressure over the western Atlantic will
    maintain fresh to strong east winds and rough seas over the south-
    central portion of the basin and near Colombia through the early
    part of the week. Fresh to strong northeast winds and building
    seas will prevail south of Cuba, in the Windward Passage, and
    south of Hispaniola through most of the upcoming week. Winds and
    seas will diminish late in the week.

    ...ATLANTIC OCEAN...

    A nearly stationary front extends southwestward from 31N59W to
    26N63W, and to the north-central portion of the Dominican
    Republic. Convergent southerly winds are producing scattered
    moderate convection within 240 nm east of the front north of 26N,
    and within 150 nm east of the front south of 26N. Scattered
    showers and isolated thunderstorms are evident along and just
    inland the coast of Hispaniola.

    A trough is analyzed over the western Atlantic from near 29N73W
    to 25N72.5W. Isolated showers have recently developed from 25N
    to 27N between 72W and 74W.

    Overnight scatterometer satellite data reveals fresh to locally
    strong northeast winds behind the front. Seas with these winds
    are in the range of 7 to 10 ft between the front and the Bahamas.
    Lower seas of 5 to 7 ft are west of the Bahamas, but occasionally
    to 9 ft in the Straits of Florida. To the east of the front, the
    basin is dominated by a broad area of high pressure that is
    associated to a strong Azores high center of 1032 mb. The pressure
    gradient between the high pressure and relatively lower pressure
    to its south is generally supporting moderate to fresh trades east
    of 60W, where seas are 7 to 9 ft in long-period northeast swell.
    An area of light to gentle winds is between the front and 60W.
    Seas are 5 to 7 ft in mixed north and east swell within this area.

    For the forecast west of 55W, the fresh to locally strong northeast
    winds behind the aforementioned front will expand in coverage
    through Mon night as the northern portion of the frontal boundary
    transitions back to a cold front as it reaches the northeast
    forecast waters late on Mon. The winds then diminish to mostly fresh
    speeds starting Tue south of 28N as the high pressure weakens, with
    an associated ridge near 31N. Rough seas from large northeast swell
    will linger into the start of next week between Bermuda and the Bahamas.

    $$
    Aguirre

    =3D =3D =3D =3D =3D =3D =3D
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    * Origin: Project Scorpio TEST (1:2320/106)