Terminology used in the Shipping Forecast
- Winds of at least Beaufort force 8 (34-40 knots) or gusts reaching 43-51 knots.
- Severe Gale
- Winds of force (41-47 knots) or gusts reaching 52-60 knots.
- Violent Storm
- Winds of force 11 (56-63 knots) or gusts of 69 knots or more.
- Hurricane Force
- Winds of force 12 (64 knots or more). Note the term is Hurricane Force: the term hurricane on its own is only used to imply a true tropical cyclone.
- Expected within 6 hours of time of issue.
- Expected within 6 to 12 hours of time of issue.
- Expected more than 12 hours from time of issue.
- Visibility less than 1000m.
- Visibility between 1000m. and 2 n.miles.
- Visibility between 2 and 5 n.miles.
- Visibility more than 5 n.miles.
Movement of Pressure Systems
- Moving at less than 15 knots.
- Moving at 15 to 25 knots.
- Rather Quickly
- Moving at 25 to 35 knots.
- Moving at 35 to 45 knots.
- Very Rapidly
- Moving at more than 45 knots.
Pressure Tendency in Station Reports
- Rising (or Falling) Slowly
- Pressure change of 0.1 to 1.5 hPa in the preceding 3 hours.
- Rising (or Falling)
- Pressure change of 1.6 to 3.5 hPa in the preceding 3 hours.
- Rising (or Falling) Quickly
- Pressure change of 3.6 to 6.0 hPa in the preceding 3 hours.
- Rising (or Falling) Very Rapidly
- Pressure change of more than 6.0 hPa in the preceding 3 hours.
- Now Rising (or Falling)
- Pressure has been falling (rising) or steady in the preceding 3 hours, but at the time of observation was definitely rising (or falling).
- Wind Direction
- Indicates the direction from which the wind is blowing.
- Wind Becoming Cyclonic
- Indicates that there will be considerable change in wind direction across the path of a depression within the forecast area.
- The changing of the wind in the direction of motion of the hands of a clock, e.g. SW to W.
- The opposite direction to veering, e.g. SE to NE.