";s:4:"text";s:1263:" With long-lasting thunderstorms, the anvil may spread more than 100 miles downwind. Shipping forecast terms are strictly defined so that forecasts are as concise as possible consistent with clarity; information in an overlong forecast is, all too easily lost. THUNDERSTORM TERMS. In the UK, the Shipping Forecast is currently provided by the UK Met Office and is regularly broadcast on BBC Radio 4 on behalf of the British Maritime & Coastguard Agency. Anvil - The spreading out (by strong winds) of the upper portion of the thunderstorm.
It is broadcast at 0048 hrs on FM and LW (including reports from coastal stations, an inshore waters forecast and brief UK weather outlook).
It usually has a fibrous or smooth appearance. The waters around the British Isles are divided into 31 sea areas shown on the map. Shipping forecast definition: → the shipping forecast | Meaning, pronunciation, translations and examples The shipping forecast is issued four times a day at 2300, 0500, 1100, 1700 UTC and covers a period of 24 hours from 0000, 0600, 1200 and 1800 UTC respectively.