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A QPF will be created when precipitation amounts reaching a minimum threshold are expected during the forecast's valid period. Valid periods of precipitation forecasts are normally synoptic hours such as 00:00, 06:00, 12:00 and 18:00 GMT. Terrain is considered in QPFs by use of topography or based upon climatological precipitation patterns from ...
The E–OBS daily gridded dataset is a European land-only, high-resolution gridded observational dataset produced using the ECA&D blended daily station data. The dataset covers the area 25–75N x 40W–75E and comes in two grid flavours with two resolutions: a 0.22° and 0.44° rotated grid (North Pole at 39.25N, 162W) and a 0.25° and 0.50 ...
[4] [7] In areas where metric units are used, rain is measured in intervals of 0.1 millimetres (0.004 in), while other precipitation is typically measured in intervals of 0.1 centimetres (0.04 in). [ 8 ] [ 9 ] Anything less than these amounts is generally referred to as a trace .
Environment Canada reports a chance of precipitation (COP) that is defined as "The chance that measurable precipitation (0.2 mm of rain or 0.2 cm of snow) will fall on any random point of the forecast region during the forecast period." [7] The values are rounded to 10% increments, but are never rounded to 50%. [8]
Rainfall character is decided by the total amount of rain that has fallen in a set period (usually 1 hour) by counting the number of pulses during that period. Algorithms may be applied to the data as a method of correcting the data for high-intensity rainfall. Tipping bucket rain gauge recorder Closeup of a tipping bucket rain gauge recorder chart
Highest minimum temperature for a 24-hour period and for a calendar day: 42.6 °C (108.7 °F) at Qurayyat, Oman on 25 June 2018. [ 193 ] Highest average monthly temperature: 42.3 °C (108.1 °F), in Death Valley, California, for the month of July 2018.
Rain forests are characterized by high rainfall, with definitions setting minimum normal annual rainfall between 1,750 and 2,000 mm (69 and 79 in). [98] A tropical savanna is a grassland biome located in semi-arid to semi-humid climate regions of subtropical and tropical latitudes, with rainfall between 750 and 1,270 mm (30 and 50 in) a year.
The lowest temperature was 21 °F (−6 °C) on January 20, 1922. The wettest year was 1978 with 27.67 inches (703 mm). The driest year was 2002 with 2.63 inches (66.8 mm). The greatest rainfall in one month was 14.50 inches (368 mm) in January 1969, including a record 24-hour rainfall of 6.71 inches (170.4 mm) on January 20 that month. [44] [45]