• TROPDISC: Gale and Swells

    From Mike Powell@1:2320/105 to All on Thu Feb 20 13:24:00 2025
    817
    AXNT20 KNHC 201049
    TWDAT

    Tropical Weather Discussion
    NWS National Hurricane Center Miami FL
    1215 UTC Thu Feb 20 2025

    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 1030 UTC.

    ...SPECIAL FEATURES...

    Gulf of Mexico Gale Warning:
    A strong cold front extends from Venice, Florida southwestward to
    23N90W to the central Bay of Campeche. The front will continue to
    quickly move southeastward across the remainder of the basin
    through tonight. A Gale Warning remains in effect today through
    this evening for off Veracruz. These winds will continue to
    produce rough to very rough seas, peaking to around 19 ft today
    off Veracruz. Winds and seas will diminish during the weekend.

    Atlantic Ocean Significant Swell Event:
    Large NW swell of 12 to 16 ft over the subtropical Atlantic north
    of 27N between 35W and 55W will shift eastward, and cover the
    waters north of 25N between 25W and 50W today, and north of 17N
    east of 35W Fri before gradually subsiding.

    ...MONSOON TROUGH/ITCZ...

    A monsoon trough extends from 11N15W to 02N20W. The ITCZ extends
    from 02N20W to 00N30W to 02S40W. Scattered moderate isolated
    strong convection is ongoing from 01S to 06N between 03W to 20W.
    Scattered moderate convection is elsewhere from 04S to 03N between
    20W and 32W.

    ...GULF OF MEXICO...

    Please read the Special Features section about the Gale Warning in
    the Gulf of Mexico.

    A strong cold front extends from Venice, Florida southwestward
    to 23N90W to the central Bay of Campeche. A Gale Warning remains
    in effect today through this evening for off Veracruz with rough
    to very rough seas, already peaking to around 19 ft off Veracruz.
    Scattered showers and thunderstorms are active ahead of the cold
    front over the SE Gulf, the Yucatan Peninsula and the Bay of
    Campeche. Strong to near-gale force winds follow the front
    elsewhere across the Gulf. Seas range from 8 to 18 ft behind the
    front west of 86W, with the highest wave heights off Veracruz,
    Mexico. Seas ahead of the front over the SE Gulf are 3 to 7 ft
    where winds are light to gentle.

    For the forecast, the cold front will continue to quickly move
    southeastward across the remainder of the basin through tonight.
    Gale force northerly winds will continue off Veracruz through
    this evening. Winds and seas will gradually diminish over the
    weekend. A trough is expected to develop from the frontal remnants
    over the west-central and SW Gulf on Fri and linger through Sat
    night while weakening. Fresh to strong winds are expected over the
    waters north of 22N and west of 90W Fri through Sat night. Low
    pressure may develop along the trough on Sat near southern Texas
    and track NE near the rest of the Texas coast through Sun night
    while weakening. High pressure will settle in over the NW Gulf
    early next week, preceded by a surge of moderate to fresh
    northerly winds from the eastern Gulf to the SW Gulf.

    ...CARIBBEAN SEA...

    The broad subtropical ridge that has persisted north of the region
    for the last several days is weakening and shifting eastward ahead
    of a strong cold front moving through the Gulf of Mexico. This
    is allowing trade winds across the eastern and central Caribbean
    to diminish a bit, although strong NE to E winds and rough seas
    persist near the coast of northeast Colombia and in the Gulf of
    Venezuela. Moderate to fresh E winds and 5 to 7 ft seas persist
    elsewhere across the Caribbean, except for 2 to 4 ft over the
    northwest Caribbean outside of the Gulf of Honduras where fresh E
    winds are pulsing.

    For the forecast, moderate to fresh trade winds and moderate seas
    will continue over most sections of the central and eastern
    Caribbean through Mon night, except for strong to near gale-force
    winds and rough seas offshore of Colombia and within and near the
    Gulf of Venezuela. Gentle to moderate winds along with slight to
    moderate seas will prevail in the northwestern Caribbean through
    tonight, then return Sat night through Mon night. A cold front
    will approach the Yucatan Channel tonight, reach the Windward
    Passage late Fri, stall along western Hispaniola Fri night, then
    gradually lift northward Sat before dissipating Sat night near the
    southern Bahamas. Strong high pressure will build in the wake of
    the front N of the area and will lead to the development of fresh
    to strong NE winds in the Lee of Cuba and the Windward Passage Fri
    evening through early Sun. Otherwise, rough seas in east swell
    will continue east of the Lesser Antilles through Sat, subsiding afterward.

    ...ATLANTIC OCEAN...

    Please refer to the Special Features section for information on
    the Significant Swell.

    A cold front extends from 31N76W SW to Melbourne, Florida. Fresh
    to strong S winds and rough seas are evident ahead of the front to
    63W, north of 27N. Fresh to locally strong W to NW winds also
    follow the front with rough seas to 9 ft. S of 27N and ahead of
    the front, winds are from the SE to S and seas are moderate to
    rough in E swell. A broad ridge anchored by a 1025 mb high W of
    the Canary Islands and a 1023 mb high E of Bermuda covers the
    remainder subtropical Atlantic waters. Winds over the central and
    eastern subtropical waters are gentle to moderate, except between
    the Canary and Cape Verde Islands where NE winds are fresh to
    strong with seas to 12 ft. Over the tropical Atlantic, trades are
    mainly fresh and seas are rough to 10 ft pprimarily in NW swell.

    For the forecast west of 55W, fresh to strong winds will continue
    to affect the offshore waters N of 27N through Fri, ahead and
    behind the cold front. The front will reach from Bermuda to
    central Cuba early Fri, from near 31N57W to the Windward Passage
    Fri evening, from 28N55W to western Hispaniola Fri night into Sat
    where it will stall and then gradually lift northward Sat before
    dissipating Sat night near the southern Bahamas. Strong high
    pressure will build Sat and Sat night in the wake of the front.
    The resultant tight gradient will bring fresh to strong northeast
    winds south of 25N, including the Florida Straits and the Great
    Bahama Bank, Fri night into Sat night. Conditions begin to improve
    beginning Sun morning as a second but weaker cold front moves
    across the NW offshore waters, reaching from near 31N71W to
    29N74W Mon night.

    $$
    Ramos
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