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sunny spells in the south it could reach 20°C. Friday will be a day of sunshine and showers, which could be heavy and slow moving at times with some thunder, lightning and hail. The showers will affect most parts of the UK, including London, with some more persistent rain affecting parts of eastern

worked? • What may need to change next time? • Did you feel the time limit helped? • Can you think of any more extreme weather that you could prepare your shelter for? For example, hail (For this, you could use small pebbles) If you would like to learn more about past extreme weather events in the UK

October 2000. The previous highest 12-hourly value (09-21 GMT or 21-09 GMT) was 62.9 mm on 10 June 1993. The average October 1961-1990 rainfall. Radar imagery 3-hourly radar imagery from 13/14 October 2002 Please note: The empirical relationship between radar reflectivity and rainfall rate is fixed whereas in reality this is highly dependent on precipitation type and is very different for rain and hail. Last updated: 11 February 2013 © Crown Copyright

convection” must be added to this to get the total rainfall accumulation. Implied depth of the layer of liquid water which has been deposited on the surface in the previous hour. This included rain, snow, and hail with the ice phase precipitation being considered as a liquid water equivalent (lwe) value

which has been deposited on the surface in the previous hour. This included rain, snow, and hail with the ice phase precipitation being considered as a liquid water equivalent (lwe) value. It includes the contribution from the model convection scheme if this is invoked (true for Global models

showers and thunderstorms over Northern Ireland and parts of Scotland on the 9th led to surface water issues on the M74 at junction 12, and hail caused slow traffic, the hail reportedly looking like the snow from earlier in the year; as the hail melted, surface water issues affected the A9. Scotrail

with a much as 30 mm of rainfall in an hour and 60 mm in 3 hours. Large hail and strong, gusty winds are also likely and we have issued a Met Office weather warning highlighting the areas most at risk”  A Level 3 heat-health watch alert has been issued for a large part of England, in association

and intensity of convective storms; assess their development and the potential for hail. 3D parameter • A Horizontal reflectivity (3D) – 24 levels of radar data will be produced Figure 1: Coverage of radar products EU-IRMA product EU-OPERA product Figure 2: 24 levels of radar data Benefits Greater

affecting transport and power networks”. Freezing rain starts as snow, ice, or hail, which melts as it falls through a layer of relatively warmer air before refreezing in a layer of colder air. The rain droplets become 'supercooled' and are close to or below freezing on impact on surfaces such as roads

authorities.”. Freezing rain starts as snow, ice, or hail, which melts as it falls through a layer of relatively warmer air before encountering  a layer of colder air near the ground. The rain droplets become 'supercooled' and are below freezing on impact on surfaces such as roads, pavements and power