cumulative levels of precipitation over a 1-hour, 3-hour or 6-hour period, depending on the forecast length.
The colour scale denotes precipitation rates, from light precipitation of 0.1 mm/hour (0.3 mm/3 hours and 0.5 mm/6 hours) shown in light yellow, up to heavy precipitation of 50 mm/hour (90 mm/3 hours and
200 mm/6 hours) shown in red.
Wind barbs are also shown on the maps. The stem of the barb
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