About sailbrief
sailbrief builds a printable day sheet for a sail from Richmond onto San Francisco Bay: wind, temperature, visibility, tides, currents, NWS alerts, and Coast Guard notices through the whole day, with your sail window marked.
How to use it
- Pick a date, the start of your window, and when you plan to be docked again.
- On the map, tap markers to select or unselect them: green rings are wind forecast points, blue dots tide stations, orange dots current stations. Tap open water to add a wind point anywhere in the Bay.
- Optionally pick a boat to show its keel depth and hull speed.
- Press Build day sheet. The sheet's address holds every choice, so you can bookmark it or open it on your phone; it refetches the latest data each time.
Limits: up to 8 wind points, 4 tide stations, and 6 current stations per sheet, for dates from today to 90 days ahead.
What the numbers are, and are not
- Wind comes from the NWS gridded forecast. A point you tap is a sample of a forecast grid cell about 2.5 km across, not a spot forecast. Narrow places such as Raccoon Strait often blow differently from what the model resolves.
- Tides are water level; currents are water movement. The sheet never uses one for the other. Times are NOAA predictions, not observations.
- NWS forecasts visibility only about 40 hours ahead; UV and air quality run out after about 4 to 5 days; the wind forecast covers about 7 days.
- "Tradewinds threshold exceeded" means the forecast is over the club's wind limits (over 25 kt sustained or 30 kt gusts): check with the office before leaving. Club rules on the sheet come from the club manual and may be out of date; the club's current rules win.
- If a source is down, the sheet says what is missing rather than guessing.
It does not replace charts, VHF weather, Notices to Mariners, club instructions, or your own judgment.
Built by Ilian Georgiev. https://sailbrief.app · version 0.1.0+4f6443a