983
AXNT20 KNHC 090908 CCA
TWDAT
TROPICAL WEATHER DISCUSSION...CORRECTED
NWS NATIONAL HURRICANE CENTER MIAMI FL
0615 UTC THU APR 09 2026
CORRECTED 1ST SPECIAL FEATURE SECTION
TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA, CENTRAL AMERICA
GULF OF AMERICA, 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
0545 UTC.
..SPECIAL FEATURES
WESTERN ATLANTIC GALE WARNING: THE PRESSURE GRADIENT BETWEEN A
SLOW-MOVING COLD FRONT THAT EXTENDS FROM NEAR BERMUDA TO WEAK LOW
PRESSURE OF 1015 MB NEAR 30N69W, AND FROM THE LOW TO 25N74W AND
STRONG HIGH PRESSURE OF 1037 MB CENTERED WELL NORTH OF THE AREA JUST
EAST OF THE NEW ENGLAND COAST IS CONTINUING TO ALLOW FOR GALE-FORCE
WINDS ALONG WITH ROUGH TO VERY ROUGH SEAS PEAKING UP TO AROUND 18 FT
(5 M) OVER THE WATERS NORTH AND NORTHEAST OF THE BAHAMAS AND EAST TO
A LINE FROM NEAR 31N67W TO 28N71W TO 27N77W. THESE WIND AND SEA
CONDITIONS WILL DIMINISH THROUGH FRI, WITH SEAS LOWERING TO BELOW 12
FT (4 M) AS THE FRONT SLOWLY MOVES EASTWARD AND WEAKENS.
EAST ATLANTIC LARGE SWELL: LONG-PERIOD NORTH SWELL AT 13-15
SECONDS CONTINUES PROPAGATING SOUTHWARD ACROSS PORTIONS OF THE
FAR EASTERN ATLANTIC LEADING TO SEAS OF 11 TO 13 FT EAST OF ABOUT
40W. ROUGH SEAS COVER A MUCH EXPANSIVE AREA NORTH OF 08N AND EAST
OF 55W. THIS SWELL EVENT WILL DECAY SLOWLY, AND SEAS OF 12 FT OR
GREATER WILL REACH AS FAR SOUTH AS 15N EARLY TODAY. SEAS ARE
EXPECTED TO LOWER BELOW 12 FT LATE THU NIGHT, ALTHOUGH ROUGH SEAS
WILL LIKELY PERSIST INTO THE WEEKEND.
PLEASE READ THE LATEST HIGH SEAS FORECAST ISSUED BY THE NATIONAL
HURRICANE CENTER AT WEBSITE:
HTTPS://WWW.NHC.NOAA.GOV/TEXT/MIAHSFAT2.SHTML FOR MORE DETAILS ON
BOTH THE WESTERN ATLANTIC GALE WARNING AND THE SIGNIFICANT SWELL
EVENT IN THE EAST ATLANTIC.
GALE WARNING E OF 35W: A GALE WARNING REMAINS IN EFFECT FOR THE
METEO-FRANCE MARINE ZONE OF MADEIRA THROUGH 09/06Z. ALONG WITH
THE GALE WINDS, VERY ROUGH SEAS IN NORTHWEST TO NORTH SWELL ARE
ALSO REACHING THE ISLANDS.
FOR MORE DETAILS, REFER TO THE METEO- FRANCE HIGH SEAS FORECAST
LISTED ON THEIR WEBSITE HTTPS://WWMIWS.WMO.INT
..MONSOON TROUGH/ITCZ
THE MONSOON TROUGH AXIS ENTERS THE ATLANTIC NEAR 10N14W AND
EXTENDS SOUTHWESTWARD TO 03N22W, WHERE IT TRANSITIONS TO THE
ITCZ TO 01S30W AND TO NEAR THE COAST OF BRAZIL AT 02S43W.
SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS WITHIN 120 NM
NORTH OF THE ITCZ BETWEEN 38W-43.5W AND WITHIN 60 NM NORTH OF THE
ITCZ BETWEEN 33W AND 36W. SCATTERED MODERATE CONVECTION IS FROM
02N TO 04N BETWEEN 18W-24W.
..GULF OF AMERICA
A WEAK TROUGH, PREVIOUSLY THE OLD STATIONARY FRONTAL BOUNDARY,
EXTENDS ACROSS THE STRAITS OF FLORIDA TO THE FAR SOUTH-CENTRAL
GULF NEAR 23N88.5W. SCATTERED TO LOCALLY BROKEN LOW AND ISOLATED
SHOWERS ARE NEAR THE TROUGH. SCATTERED MODERATE CONVECTION IS
CONFINED TO THE SOUTHWEST GULF SOUTH OF 22N WEST 95W TO INLAND
MEXICO, AND OVER THE FAR WEST-CENTRAL GULF FROM 24N TO 25.5N WEST OF
96W. LATEST ASCAT SATELLITE DATA SHOW FRESH TO STRONG NORTHEAST
WINDS OVER THE EASTERN GULF WHERE A TIGHT PRESSURE GRADIENT EXISTS
BETWEEN STRONG HIGH PRESSURE OVER THE NORTHEAST U.S. AND THE
TROUGHING OVER THE SOUTHEASTERN GULF. ROUGH SEAS ARE BEING PRODUCED
BY THESE WINDS.
LIGHT TO GENTLE NORTHEAST TO EAST WINDS AND MOSTLY MODERATE SEAS
ARE NOTED ELSEWHERE, WITH THE EXCEPTION OF MODERATE TO LOCALLY
FRESH EAST WINDS OFFSHORE LOUISIANA TO NEAR 27N.
FOR THE FORECAST, THE AFOREMENTIONED TROUGH WILL DRIFT SLOWLY
EASTWARD AND OUT OF THE BASIN TODAY. HIGH PRESSURE BUILDING OVER THE
EASTERN U.S. WILL SUPPORT STRONG NORTHEAST WINDS AND ROUGH SEAS
ACROSS THE NORTHEAST GULF THROUGH TONIGHT. THIS PATTERN WILL
MAINTAIN MODERATE TO FRESH EAST TO SOUTHEAST WINDS AND MODERATE SEAS
ACROSS THE BASIN, EXCEPT FOR OCCASIONAL STRONG EAST WINDS OFF
WESTERN CUBA THROUGH EARLY NEXT WEEK.
..CARIBBEAN SEA
SCATTERED SHOWERS AND THUNDERSTORMS AIDED BY A MID-LEVEL SHORTWAVE
TROUGH ARE NOTED NORTH OF 20N AND BETWEEN 81W AND JUST EAST OF
THE NORTHEAST PART OF THE YUCATAN PENINSULA. THIS ACTIVITY ALSO
EXTENDS NORTHEASTWARD TO INLAND WEST-CENTRAL CUBA. LOW-TOPPED
TRADE WIND ISOLATED SHOWERS ARE NOTED ELSEWHERE. WINDS ARE
STRONGEST, UP TO 25 KT, OVER THE USUAL LOCATIONS, THE SOUTH-
CENTRAL PORTION OF THE AREA OFF THE COASTS OF COLOMBIA AND
VENEZUELA, WHERE THE PRESSURE GRADIENT IS TIGHT BETWEEN LOW
PRESSURE OVER COLOMBIA AND STRONG HIGH PRESSURE THAT IS JUST
OFFSHORE NEW ENGLAND. THESE WINDS ARE RESULTING IN SEAS OF UP
TO AROUND 8 FT OVER THESE WATERS. LATEST ASCAT SATELLITE DATA
INDICATES MOSTLY LIGHT AND VARIABLE WINDS OVER THE WESTERN
PART OF THE BASIN.
FOR THE FORECAST, STRONG HIGH PRESSURE BUILDING SOUTHWARD FROM
THE WESTERN ATLANTIC WILL TIGHTEN THE PRESSURE GRADIENT AND
INCREASE WINDS OVER THE BASIN, LEADING TO STRONG WINDS OVER THE
SOUTH-CENTRAL CARIBBEAN THROUGH THE WEEKEND. BY EARLY NEXT WEEK,
FRESH TO STRONG NORTHEAST WINDS ALONG WITH BUILDING SEAS WILL
MATERIALIZE SOUTH OF CUBA AND IN THE WINDWARD PASSAGE.
..ATLANTIC OCEAN
A GALE WARNING IS IN EFFECT FOR THE PORTIONS OF THE WESTERN ATLANTIC.
METEO-FRANCE ALSO HAS A GALE WARNING IN EFFECT FOR THE FORECAST
ZONE OF MADEIRA. PLEASE REFER TO THE SPECIAL FEATURES SECTION ABOVE
FOR DETAILS ON THESE HAZARDOUS WEATHER EVENTS.
THE REMAINDER OF THE BASIN IS DOMINATED BY STRONG SURFACE HIGH
PRESSURE OF 1039 MB CENTERED TO THE SOUTHWEST OF THE AZORES NEAR
37N36W. ITS ASSOCIATED BROAD RIDGING REACHES SOUTHWARD ENCOMPASSING
THE AREA NORTH OF ABOUT 10N AND BETWEEN 16W AND 68W. THE RELATED
ANTICYCLONIC WIND FLOW IS TRANSPORTING PATCHES OF LOW-LEVEL
MOISTURE IN THE FORM BROKEN TO SCATTERED LOW-LEVEL CLOUDS WESTWARD
TO NEAR 55W. ISOLATED SHOWERS ARE POSSIBLE WITH THESE CLOUDS.
MOSTLY MODERATE TO FRESH WINDS ARE EVIDENT IN THE BASIN, EXCEPT
FOR A SWATH OF FRESH NORTHEAST WINDS OVER THE FAR EASTERN PART OF
THE BASIN NORTH OF ABOUT 15N AND EAST 30W, WHERE SIGNIFICANT
NORTHERLY SWELL IS LEADING TO VERY ROUGH SEAS. DETAILS ON THE
SWELL AND ITS FORECAST PROPAGATION CAN BE FOUND IN THE SPECIAL
FEATURES SECTION ABOVE. MODERATE SEAS DOMINATE THE REMAINDER OF
THE ATLANTIC BASIN. A GALE LOW LOCATED NORTHEAST OF THE MADEIRA
ISLANDS NEAR 34N13W WITH A PRESSURE OF 1009 MB IS FORECAST TO
MOVE SOUTH- SOUTHEASTWARD TOWARD THE FAR NORTHEAST PART OF THE
DISCUSSION AREA THIS MORNING. SCATTERED SHOWERS, UNDER COLD-AIR
INSTABILITY, ARE PRESENTLY OCCURRING OVER THE SE SEMICIRCLE OF THE
LOW REACHING TO NEAR 31N BETWEEN 12W AND 15W.
FOR THE FORECAST WEST OF 55W, PLEASE REFER TO THE SPECIAL FEATURES
WESTERN ATLANTIC GALE WARNING SECTION FOR FORECAST DETAILS RELATED
TO THE MARINE CONDITIONS RELATED TO THE SLOW MOVING COLD FRONT
MENTIONED IN THAT SECTION.
AGUIRRE
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