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cover a horizontal surface at that place if there were no loss by evaporation, percolation or run-off. The precipitation may be liquid (rain or drizzle) or frozen (snow, snow pellets, snow grains, hail, small hail, ice pellets, diamond dust) or a mixture (rain and snow, drizzle and snow, rain

and temporal resolution of the radar measurements. Dual-polarimetric radars provide detail within the storms including the precipitation rate and precipitation type (rain, hail, graupel, ice crystals). This microphysical information can be used to characterize storm severity. Particularly noteworthy

by showers, heaviest and most frequent over the north and west, and wintry at times. The 23rd was wet and windy once again, Fair Isle (Shetland) seeing gusts up to 78 mph, with frequent, heavy showers, and thunderstorms over the north, falling as snow or hail in places, merging into a band of heavy

clearly. Green Green flag No severe weather warnings in force. hail Hail storm Rain drops freeze to form pellets of ice that fall from the sky. he rain heavy rain Between 20 and 50 mm of rain falls in 24 hours. The rain interferes with fishing and navigation becomes difficult. hi wave high waves

and are almost guaranteed to cause fatalities in such incidents. Thunderstorms also cause death and injury from lightning strikes and occasionally from hail stones. Indeed, Uganda has one of the highest reported rate of lightning strikes in the world 158 - 218 per square km (see Powell, 2016). Mary

learned previously, precipitation is water that falls to the ground and includes rain, snow and hail. Encourage the children to compare these two projections. • Prompt questions: In which scenario (high or low emissions) is there greater precipitation, meaning that it is wetter? Are there any

of raindrops. In turn, understanding more about their structure will help forecasters accurately pinpoint the difference between rain, hail and snow. And that means they can provide clearer and more accurate information about heavy rainfall – especially during high-impact weather. Clearing the way

densities and fall speeds than snow. Graupel is typically smaller than hail and forms when supercooled water coats a snowflake. Subsequent testing has shown that the UKCP Local (2.2km) projections (including for temperature, precipitation and wind) can still provide important information for many

of this document, WAFC SIGWX forecasts. High Level WAFC SIGWX forecasts. Medium Level WAFC SIGWX forecasts. Flight Level Feet Knot (nautical mile per hour) Radioactive (used with CLD) Cloud Graupel (hail) Thunderstorm Volcanic Ash Notice to Airmen NOTAM series relating to volcanic ash. Information issued

(in the context of this document, WAFC SIGWX forecasts. High Level WAFC SIGWX forecasts. Medium Level WAFC SIGWX forecasts. Flight Level Feet Knot (nautical mile per hour) Radioactive (used with CLD) Cloud Graupel (hail) Thunderstorm Volcanic Ash Notice to Airmen NOTAM series relating to volcanic ash