This phrase appeared on the TV screen at the weather channel. Sorry, there was no context. I guess it is related to 'weather forecasts.' What do you think? Please let me know.
Yes, it probably does relate to the weather forecast.
A "small craft" is a small boat, and an item headed "small craft advisory" would probably be a warning of bad weather out at sea which small boats should avoid.
SMALL CRAFT ADVISORY: To alert mariners to sustained (more than two hours) weather or sea conditions, either present or forecast, that might be hazardous to small boats. If a mariner notices a Small Craft Advisory pennant displayed he should determine immediately the reason by tuning his radio to the latest marine broadcast. Decision as to the degree of hazard will be left up to the boatman, base