Here's Chris Parker's Schedule and frequencies:
CARIBWX The Caribbean Weather Site
And here's the complete worldwide NWS
radio-fax schedule
http://www.nws.noaa.gov/om/marine/rfax.pdf
And here's USA Navtex/Sitor text brpadcasts:
USCG HF SITOR
NAVTEX Product Listing
Note that:
Assigned frequencies shown, for carrier frequencies subtract 1.7 kHz. Typically specialized marine communications equipment uses assigned SITOR frequencies while general purpose equipment uses carrier frequencies. Note that stations share common frequencies. For SITOR.
Better yet...here is all you need for the Caribe on one page...I used it exclusively for several years.
http://www.caribbeancompass.com/ssb_radio09.pdf