Several times this winter he's predicted winds at 25-30 and it's turned out to be 10-20. His forecast for last night was that way. I've found the Windfinder web site to be generally more accurate. With a WIFI extender I've been able to get internet access near most all populated islands.
John's right about asking other boaters who have SSB. Many keep their VHF radio on during the day and will gladly pass on what they heard from Chris Parker. He gives the forecasts from about 6:30 am to 7:30.