In shipping weather forecasts what adjective is used for an event due to occur in less than six hours?
Shipping Forecast warning the Met Office will indicate when it expects the gale to occur. "Imminent" means that a gale is expected within 6 hours, "expected soon" that a gale is expected within 6 to 12 hours and "later" in more than 12 hours' time. The Shipping Forecast is broadcast on BBC Radio 4 because its longwave signal can be received clearly at sea all around the British Isles regardless of time of day or radio conditions. For the same reason, the Shipping Forecast was broadcast in the BBC National Programme until September 1939, and then after the Second World War on
European Centre for Medium-Range Weather Forecasts is run every twelve hours and forecasts out to ten days. It includes both in a "deterministic forecast" mode and as an ensemble. The deterministic forecast is a single model run that is relatively high in both resolution but also in computational expense. The ensemble is relatively low (about half that of the deterministic) in resolution and so in computational expense, so less accurate. But it is run 51 times in parallel, from slightly different initial conditions to give a spread of likelihood over the range of the forecast. European Centre for Medium-Range Weather Forecasts The European Centre for Medium-Range