Warning: Many data filters have been introduced to the above data. Use caution with this data as some extreme values can be erroneous due to unsuspected errors in synop reports. All data should be verified. Note that the values we listed here are from international released synop reports, and for certain there will be other extreme values not in this list
RAIN FALL
Measurable rain refers to a rainfall total of 0.254 mm or greater. When you hear the terms isolated showers or few showers (10 to 20%), scattered showers (30 to 50%), or numerous showers(60 to 70%), in the forecast, this refers to the percent of the forecast area covered by measurable rain. For instance, scattered showers means that the forecast area WILL receive rain, and approximately 30 to 50 percent of the area will experience showers.