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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.
The scale of dBZ values can be seen along the bottom of the image. Decibel relative to Z, or 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]
Drizzle is a light precipitation which consists of liquid water drops that are smaller than those of rain – generally smaller than 0.5 mm (0.02 in) in diameter. [1] Drizzle is normally produced by low stratiform clouds and stratocumulus clouds. Precipitation rates from drizzle are on the order of a millimetre (0.04 in) per day or less at the ...
Rainfall rates up to 3 inches per hour are possible in the heaviest storms, which could lead to life-threatening flash flooding, according to the WPC. Damaging winds, hail and a couple of ...
red: 50 dBZ (heavy precipitation of 2 in (51 mm) per hour) yellow: 35 dBZ (moderate precipitation of 0.25 in (6.4 mm) per hour) green: 20 dBZ (light precipitation) Strong returns (red or magenta) may indicate not only heavy rain but also thunderstorms, hail, strong winds, or tornadoes, but they need to be interpreted carefully, for reasons ...
Here are rainfall amounts, in inches, from the last 24 hours (unless otherwise noted) by locality, according to National Weather Service St. Louis: Illinois locations. Belleville: 6.23, 6.33 ...
A type of light precipitation consisting of liquid water droplets which are smaller than ordinary raindrops, ... (1.1508 miles per hour or 0.5145 metres per second).
The city will likely see somewhere between 2 and 2.5 inches of rain through Tuesday, with some areas potentially getting half an inch of rain per hour, he said. As the rain moved in over San Diego ...