Met Office warnings and when to stay ashore

What the warnings mean

The Met Office issues Yellow, Amber, and Red warnings for wind (among other hazards). A Yellow warning means the weather could affect what you are doing — gusts of 40–50 mph (35–45 kt) inland are typical triggers, and even that is conservative for open water. Amber and Red mean danger to life and serious disruption is likely; on a lake, they are stay-home days, full stop.

For coastal and inshore sailors there is also the Shipping and Inshore Waters forecast with its own force scale — the Beaufort scale, where Force 6–7 ("strong breeze" to "near gale") is the traditional small-craft threshold. Inland sailors have no equivalent bulletin, which is exactly why checking the wind warning and your own numbers matters.

Translating it to your lake

Warnings are regional; your lake is local. The deciding factors are fetch and exposure. Twenty-five knots on a two-acre pond builds short, steep, annoying waves. Twenty-five knots down the long axis of a big reservoir builds genuinely dangerous chop for open dinghies, with breaking whitecaps and no rescue shortcuts. Check the warning, then check what that wind direction does over your lake's longest fetch.

Our sailing score folds this in approximately — hours above 22 knots score poorly in every profile — but a score is not a substitute for an official warning. When a Met Office wind warning covers your area, the score should already be red. If it is not, trust the warning.

The honest go/no-go checklist

Go if: winds are inside your profile band, gust factor is below ~1.5, no precip probability above 45%, water temp is survivable for your gear, and your boat is rigged for the gusts, not the average. Stay ashore if any of those flip — especially the gear one. The most common serious incident on small waters is not a surprise storm; it is a warm sunny 20-knot gust-fest that a capable sailor in the wrong boat went out to "just have a look at."