• TROPDISC: Tropical Wave

    From Mike Powell@1:2320/107 to All on Thursday, May 07, 2026 08:49:22
    569
    AXNT20 KNHC 070945
    TWDAT

    Tropical Weather Discussion
    NWS National Hurricane Center Miami FL
    1215 UTC Thu May 7 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 0700 UTC.

    ...TROPICAL WAVES...

    The axis of an eastern Atlantic tropical wave is near 33.5W,
    S of 11N, moving westward at 10-15 kt. Nearby convection is
    discussed in the monsoon trough/ITCZ section below.

    ...MONSOON TROUGH/ITCZ...

    The monsoon trough enters the Atlantic near 12N15.5W and
    continues southwestward to near 01.5S31W, with the tropical
    wave described above to the west. The ITCZ is analyzed from west
    of the tropical wave near 02N37W to near the coast of Brazil at
    00N47W. Isolated to widely scattered moderate convection is noted
    S of 04N along both, the ITCZ and the monsoon trough, and near the
    tropical wave.

    ...GULF OF MEXICO...

    A weak cold front is moving into the Texas coastal waters, with
    high pressure ridging in control across the waters ahead of it.
    The pressure gradient between high pressure over the E Gulf and
    lower pressures over Mexico is supporting gentle to moderate SE
    winds over the eastern Gulf E of 86W, and across the western Gulf
    nearshore waters where the pressure gradient has weakened slightly
    due to front moving toward the SW Louisiana and Texas coasts.
    Moderate to fresh winds prevail elsewhere, mainly in the central
    Gulf, with locally strong SE winds near the Yucatan Peninsula due
    to the diurnal trough. Seas are 4-6 ft N of 21N and W of 89W,
    except lower in the coastal waters, and 1-3 ft across the
    remainder of the basin, including the eastern Gulf.

    For the forecast, the weak front is forecast to move slowly
    today, and quickly stall just beyond the Texas coastal waters by
    this evening, then lift back to the north as a warm front Fri into
    Sat as high pressure ridging builds back in across the basin from
    the east. Winds will pulse to fresh to strong near the Yucatan
    Peninsula in the evenings through Sat. Looking ahead, another cold
    front may try to move into the northern Gulf waters late on Sun,
    and reach from north- central Florida to eastern Bay of Campeche
    by late on Mon, followed by moderate to fresh north to northeast
    winds. Scattered to numerous showers and thunderstorms, some
    possibly strong to marginally severe, are possible to precede the
    fronts.

    ...CARIBBEAN SEA...

    The pressure gradient between central Atlantic high pressure and
    relatively lower pressure in northern South America is supporting
    fresh to strong winds over the south central Caribbean, where seas
    are in the 6-9 ft range. Similar winds are in the Gulf of Honduras
    with 5-7 ft seas. Moderate to fresh E-SE winds and 4-6 ft seas
    prevail elsewhere from 10.5N to 19N, as well as S of the Yucatan
    Channel, with mainly gentle winds across the remainder of the
    basin, including near the Windward Passage, the lee of Cuba, and
    SW Caribbean S of 10.5N, along with 2-4 ft seas.

    For the forecast, the pressure gradient between central Atlantic
    high pressure and relatively lower pressure in northern South
    America will continue to sustain fresh to strong trades over the
    south-central Caribbean along with locally rough seas through the
    forecast period, with similar conditions expected in the Gulf of
    Honduras, though diminishing there Mon night as a cold front may
    approach the NW Caribbean from the Gulf of Mexico. Moderate to
    fresh trades are expected across the remainder of the eastern and
    central Caribbean.

    ...ATLANTIC OCEAN...

    A weakening frontal system with attendant low pressure is in the
    process of moving through into the Mid-Atlantic and SE United
    States. Numerous convection is out ahead of the front from
    northern Florida and Georgia northward to the Delmarva and beyond.
    Some of this convection is impacting the waters off SE Georgia
    and northern Florida, while winds there out of the S have
    increased to moderate to fresh. To the E, a weakening front
    extends from low pressure N of the discussion waters through
    31N56W to 27.5N70W, with scattered moderate convection present N
    of 25N within of about 240 nm E-SE of the front. Seas are 4-6 ft
    N of 28N between 54W and 64W. Continuing eastward, high pressure N
    of the area combined with broad troughing supports moderate to
    locally fresh mainly NE-E winds and 6-8 ft seas across the area N
    of 20N between 20W and 47W. Gentle to moderate winds dominate the
    remainder of the tropical Atlantic waters, along with 4-6 ft seas,
    except 3-4 ft W of 64W.

    For the forecast west of 55W, the weakening front in the central
    Atlantic is forecast to slowly shift east while washing out
    today. Another front will move off northern Florida tonight,
    gradually losing definition as it shifts across the northern
    waters through Sat. Southerly winds are expected to freshen off
    northern Florida Sun night ahead of a stronger front that is
    expected to move across the northwest forecast waters through Mon
    night, followed by moderate to fresh northwest winds. Scattered to
    numerous showers and thunderstorms, some possibly strong to
    marginally severe, are possible ahead of both fronts. Otherwise, a
    high pressure ridge extending from near 30N55W to near Cape
    Canaveral, Florida will be in place during the forecast period,
    allowing for generally quiet conditions across the area.
    Meanwhile, winds may pulse to moderate to fresh off northern
    Hispaniola, increasing to fresh to strong this weekend and into
    early next week.

    $$
    Lewitsky

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  • From Mike Powell@1:2320/107 to All on Friday, May 08, 2026 08:09:36
    563
    AXNT20 KNHC 081021
    TWDAT

    Tropical Weather Discussion
    NWS National Hurricane Center Miami FL
    1215 UTC Fri May 8 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 1005 UTC.

    ...TROPICAL WAVES...

    A tropical wave is in the central Atlantic, south of 09N with
    axis near 38W, moving west at 5 kt. Scattered moderate convection
    is observed south of 04N and between 33W and 40W.

    ...MONSOON TROUGH/ITCZ...

    The monsoon trough enters the Atlantic through the coast of Guinea
    near 11N15W and continues southwestward to 04N20W. The ITCZ
    extends from 04N20W to 01N34W and then from 01S39W to 02S44W.
    Scattered moderate to isolated strong convection is present south
    of 07N and between 17W and 33W.

    ...GULF OF MEXICO...

    A weak cold front extends from the Florida panhandle to 29N90W,
    then a stationary front continues southwestward to NE Tamaulipas.
    Strong showers and thunderstorms are affecting the western Gulf
    waters. A weak ridge dominates the remainder of the basin
    supporting tranquil weather conditions. Moderate to fresh easterly
    winds and seas of 4-6 ft are occurring off northern Yucatan and
    the eastern Bay of Campeche. Moderate or weaker winds and slight
    to moderate seas are prevalent elsewhere.

    For the forecast, the scattered showers and isolated thunderstorms
    in the offshore waters of the western Gulf will spread to the
    north-central and NE Gulf by tonight as the front sinks a bit
    farther south. The front will then stall and lift back to the
    north as a warm front late tonight thru Sat. Afterward, the ridge
    should build back across the Gulf from the east. Winds will pulse
    to strong near the Yucatan Peninsula in the evenings through Sun
    night. Looking ahead, another cold front might move into the
    northern Gulf waters late Sun, and reach from north- central
    Florida to eastern Bay of Campeche by late on Mon, followed by
    moderate to fresh N to NE winds. Scattered to numerous showers and thunderstorms are possible ahead of the front.

    ...CARIBBEAN SEA...

    Broad high pressure north of the Caribbean and lower pressures in
    the deep tropics result in fresh to strong easterly trade winds
    and locally rough seas in the south-central Caribbean and Gulf of
    Honduras. Elsewhere, moderate or weaker winds and slight to
    moderate seas prevail.

    For the forecast, a tight pressure gradient between a surface ridge
    across the central Atlantic and relatively lower pressure over
    northern Colombia will continue to support fresh to strong
    easterly trade winds with nighttime pulses to near-gale in the
    south-central Caribbean along with locally rough seas through
    early next week. Similar conditions are also expected in the Gulf
    of Honduras, through Sun night. Moderate to fresh trades are
    expected across the remainder of the eastern and central Caribbean.

    ...ATLANTIC OCEAN...

    A cold front has entered the waters off NE Florida supporting
    moderate southerly winds and moderate seas north of 29N and west
    of 65W. The remainder of the basin is dominated by a broad
    subtropical ridge. In the far NE Atlantic, a cold front extends
    from 31N18W to 27N30W, followed by a dissipating cold front to
    30N41W. Moderate to fresh winds and seas of 5-8 ft are occurring
    behind the front. Meanwhile, moderate easterly winds and moderate
    seas are found in the rest of the central and eastern Atlantic
    east of 50W. Elsewhere, moderate or weaker winds and slight to
    moderate seas are prevalent.

    For the forecast west of 55W, the aforementioned front off NE
    Florida will gradually weaken through Sat as it shifts eastward
    north of 28N. Southerly moderate winds ahead of the front occurring
    off NE Florida will diminish this afternoon. A stronger cold
    front is expected to follow a similar path Mon through Tue,
    followed by moderate to fresh winds. Scattered showers and
    thunderstorms, some possibly strong to marginally severe, are
    possible ahead of both fronts. Meanwhile, a surface ridge across
    the western Atlantic near 28N65W will support fresh to locally
    strong winds off northern Hispaniola might Sat through Mon nights.

    $$
    Delgado
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    * Origin: Capitol City Online (1:2320/107)
  • From Mike Powell@1:2320/107 to All on Wednesday, May 13, 2026 08:49:28
    918
    AXNT20 KNHC 131015
    TWDAT

    Tropical Weather Discussion
    NWS National Hurricane Center Miami FL
    1215 UTC Wed May 13 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 1000 UTC.

    ...TROPICAL WAVES...

    A tropical wave is analyzed along 37W from 03N to 14N, moving
    westward at 10 kt. The wave is devoid of significant deep
    convection at this time.

    ...MONSOON TROUGH/ITCZ...

    The monsoon trough axis enters the Atlantic through the coast of
    Africa near 12N16W and continues SW to 04N20W. The ITCZ extends
    from 04N20W to 00N36W to the coast of Brazil near 01S48W.
    Scattered moderate isolated strong convection is noted from 02N to
    07N between 08W and 23W, and from 07S to 04N between 30W and 51W.

    ...GULF OF MEXICO...

    A warm front extends across northern Florida and connects to a
    1013 mb low near 28N85W from which a cold front extends SW to the
    northern Yucatan Peninsula. Moderate to fresh N to NE winds are in
    the NW semicircle of the low from the Florida Big Bend to offshore
    SE Louisiana. Gentle to moderate notherlies are across the Bay of
    Campeche while light to gentle winds prevail elsewhere as high
    pressure starts to build in the wake of the front. Seas are slight
    basin-wide, except moderate to 5 ft in the NW semircle of the low
    where the strongest winds are ongoing.

    For the forecast, the cold front is forecast to exit the SE Gulf
    tonight. Winds will be generally moderate or weaker on either side
    of the front, except in the vicinity of the low where fresh to
    strong winds are likely. High pressure and quiescent conditions
    will build behind the front on today and Thu. Another weak cold
    front is forecast to enter the NE Gulf Thu night and dissipate
    over the E Gulf on Fri. Otherwise, southeast winds are forecast to
    reach moderate to fresh speeds over the western half of the basin this weekend.

    ...CARIBBEAN SEA...

    The subtropical ridge over the Atlantic forces fresh to strong
    trade winds and 5-8 ft seas across the south-central to southwest
    Caribbean. Moderate to locally fresh easterly breezes and
    moderate seas are noted across the remainder of the central and
    eastern Caribbean along with 4-6 ft seas. Moderate or weaker winds
    and slight to moderate seas are prevalent across the NW Caribbean.
    Otherwise, heavy showers and tstms are ongoing offshore Costa
    Rica near the E Pacific monsoon trough.

    For the forecast, the pressure gradient between high pressure
    north of the area and the Colombian Low will support fresh to
    strong tradewinds over the central Caribbean through the weekend,
    with the strongest winds offshore Colombia and in the Gulf of
    Venezuela. Moderate to fresh tradewinds are expected across the
    remainder of forecast waters through Sun night, pulsing to strong
    in the Gulf of Honduras Sat and Sun night. Large E swell with
    rough seas will impact the tropical N Atlantic waters from midweek
    through the weekend.

    ...ATLANTIC OCEAN...

    A warm front extends from 30N74W to Jacksonville, Florida. The
    front is generating a broad area of scattered showers and isolated
    tstms N of 23N from the Florida seaboard to 65W, including the
    Bahamas. The remainder of the subtropical Atlantic is under the
    influence of a broad ridge anchored by high pressure located well
    N of the discussion waters. Fresh to strong N to NE winds and
    seas of 7-10 ft prevail from the coast of W Africa to just pass
    the Cape Verde Islands from 13N to 24N. Over the remainder
    tropical waters winds are moderate to fresh from the NE to E and
    seas are moderate to rough. Between 55W and the Bahamas, winds are
    moderate to fresh from the E to SE and seas moderate. Moderate or
    weaker winds and moderate seas are elsewhere.

    For the forecast west of 55W, the warm front will continue to lift
    north of the area through Thu morning. Fresh to locally strong
    winds are expected west of the front with scattered showers and
    thunderstorms along the front. Another weak cold front will move
    off the NE Florida coast on Thu, extending from 31N50W to 25N72W
    Fri morning, from 31N72W to 26N65W on Sat morning, then E of the
    area Sun. Fresh to strong S winds are expected N of 27N ahead of the front.

    $$
    Ramos
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