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Week's Forecast

Teesdale weekly forecast, issued Sunday 14th January, valid until Sunday 21st, next update by Sunday 21stWindy, wintry showers and frost.The jetstream will become strong this week and displace the blocking anticyclone across Scandinavia that has brought us a week of cool and cloudy weather. The jet will move gradually south and by the weekend another blocking high pressure will appear to our west with the balancing low pressure systems moving slowly to our north, then north-east. Generally, winds will be from the north-west, turning northerly later.This week's overall prediction for mid-Teesdale:- high 7°C (45°F), low -4°C (25°F) precipitation 12mm (0.5in), sunshine 26hr, high gust 55mph. Risks:- flooding medium, gale high, frost high, fell snow high.Although the air supply will be from the Atlantic for much of this week, it will have originated in Canada. Consequently, a lot of the precipitation will be wintry although many parts of Teesdale are quite sheltered from the north-west. Snow will fall on our fells again and there will be frost and icy stretches on most nights. As the northerly flow pushes in later, temperatures will fall further with snow showers possible at all levels. Last week's weather:- Screen temperature 1.6°C (normally 2.5°C) High 5°C(41°F) Wednesday. Low -7°C(19°F) Monday. Windiest 24mph Sunday 14th. Precipitation 5mm (norm 17mm). Sunshine 10hr (norm 17hr).Last week we had a respite from strong winds with gentle south-easterly flows. The downside was fog and large amounts of cloud, in fact the sun did not shine at all for five days. This week will be much windier with gales but we should see a lot more sunshine, especially in the lower dale. One computer model is suggesting 75mph on Thursday, but most are showing 55-60mph. As usual, keep an eye on my site for updates as there will be a lot of interesting weather this week. Ken Cook’s 12 hourly Teesdale forecasts, http:// www.kencook.magix.net



COPLEY CLIMATOLOGICAL STATION altitude 253metres(830feet) Met. Office manned observing site.