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Sous surveillance: Hurricane Sam - N° 18

Type: Hurricane Nom: Sam
Latitude: 12.1 Longitude: -44.8
Mise à jour: 5:00 PM AST Fri Sep 24 Pression: 986 mb
Vitesse vents: 85 mph - 137 Km/H
Déplacement: 12 mph - 19 Km/H Direction: W

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    ZCZC MIATWOAT ALL
    TTAA00 KNHC DDHHMM RRA

    Special Tropical Weather Outlook...Retransmitted
    NWS National Hurricane Center Miami FL
    400 PM EDT Fri Sep 24 2021

    For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

    Special tropical weather outlook issued for the system located to
    the north-northeast of Bermuda.

    The National Hurricane Center is issuing advisories on Hurricane
    Sam, located about 1300 miles east-southeast of the northern Leeward
    Islands.

    1. Updated: Recent visible satellite imagery indicates that a
    well-defined center has formed with a surface low located a couple
    hundred miles north-northeast of Bermuda interacting with an
    upper-level trough. In addition, the low is producing gale-force
    winds on the north side of its circulation. Additional development
    into a subtropical storm is now expected, and advisories will likely
    be initiated this afternoon as the system moves slowly toward the
    north-northwest. Additional information on this system, including
    gale warnings, can be found in High Seas Forecasts issued by the
    National Weather Service.
    * Formation chance through 48 hours...high...90 percent.
    * Formation chance through 5 days...high...90 percent.

    2. A gale-force, non-tropical low pressure system, the remnants of
    Odette, is located less than 600 miles west of the westernmost
    Azores. Showers and thunderstorms have mostly dissipated near the
    low, and strong upper-level winds are now expected to prevent
    further development as this system moves gradually southward until
    dissipation. Additional information on this system, including gale
    warnings, can be found in High Seas Forecasts issued by the National
    Weather Service.
    * Formation chance through 48 hours...low...near 0 percent.
    * Formation chance through 5 days...low...near 0 percent.

    3. A tropical wave is expected to move off the west coast of Africa by
    the end of this weekend. Thereafter, environmental conditions are
    forecast to be conducive for gradual development, and a tropical
    depression could form by the middle of next week while the system
    moves westward at 10 to 15 mph over the far eastern tropical.
    * Formation chance through 48 hours...low...near 0 percent.
    * Formation chance through 5 days...medium...50 percent.

    High Seas Forecasts issued by the National Weather Service can be
    found under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and
    online at ocean.weather.gov/shtml/NFDHSFAT1.php

    Forecaster Papin/Landsea


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