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METAR is a format for reporting weather information. ... 15:00 or 21:00 UTC, it represents a 3-hour precipitation amount. This example shows 1.23 inches (31 mm) of ...
Precipitation amount over the past 1, 3, 6 or 24 hours is of particular interest to meteorologists in verifying forecast amounts of precipitation and determining station climatologies. Snowfall amount during the past 6 hours is taken for meteorological and climatological concerns.
When classified according to the rate of precipitation, rain can be divided into categories. Light rain describes rainfall which falls at a rate of between a trace and 2.5 millimetres (0.098 in) per hour. Moderate rain describes rainfall with a precipitation rate of between 2.6 millimetres (0.10 in) and 7.6 millimetres (0.30 in) per hour.
A shower will produce rain if the temperature is above the freezing point in the cloud, or snow / ice pellets / snow pellets / hail if the temperature is below it at some point. [1] In a meteorological observation, such as the METAR, they are noted SH giving respectively SHRA, SHSN, SHPL, SHGS and SHGR. [2] [3]
Average monthly precipitation (in mm) for selected cities in Asia ; City Country Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ref. Mawsynram: India: 133.0 8.3 15.7 27.4 29.8 26.0 5.7
Most consecutive days with measurable rain a day with at least 0.01 inches (0.25 mm) of rainfall: 331 days in Oahu, Hawaii, 1939–1940 [305] Snow.
The scale of dBZ values can be seen along the bottom of the image. dBZ is a logarithmic dimensionless technical unit used in radar. It is mostly used in weather radar, to compare the equivalent reflectivity factor (Z) of a remote object (in mm 6 per m 3) to the return of a droplet of rain with a diameter of 1 mm (1 mm 6 per m 3). [1]
First, for accumulation of freezing rain and other icy precipitation, even a trace amount can result in hazardous conditions such as slippery roads. [4] Secondly, some areas (primarily in Arctic regions) receive a significant amount of snowfall in "trace" amounts: some areas of northern Canada receive up to 80% of their snowfall in trace ...