R
Condensed moisture from the atmosphere falling as liquid water drops greater than 0.5 mm in diameter.
Compared to showers, rain is steadier and normally falls from stratiform (layer) cloud.
For terms describing rain in forecasts see:
Day when rainfall of at least 0.2 mm is recorded.
Total liquid from precipitation or condensation from the atmosphere, measured in a rain gauge.
See Chance of any rain.
Likely rainfall is the amount of rain with a 50% chance of happening during the day.
This is used as the lower value of the possible rainfall range in town forecasts.
Possible higher rainfall is the amount of rain with a 25% chance of happening during the day. There is also a 75% chance there won't be this much rain.
This is used as the higher value of the possible rainfall range in town forecasts.
Possible rainfall range is part of town forecasts. It describes the expected rainfall range for the day.
The rainfall range highlights the variability of certain types of rain. On showery or thunderstorm days where rain is more 'hit and miss', the possible rainfall range may be quite large (for example, 5–30 mm). When steady rainfall is expected over a wide area, the range may be smaller (for example, 10–15 mm).
Amount of moisture in the air. It's a percentage of the maximum moisture the air could hold at that temperature.
Elongated area of high pressure. On a weather map it shows as rounded isobars extending outwards from a high pressure system and has a ridge line.