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Week's Forecast

Teesdale weekly forecast, issued Sunday 12th November, valid until Sunday 19th November, next update by Sunday 19th.Colder again at the weekend.There are signs that the jetstream could sink south in the longer outlook period and this would bring a more prolonged colder spell later into next week. However, at the moment we continue with the very changeable theme as the jet forms ridges and troughs across Teesdale. Midweek we will be in a ridge of milder air with typical cloudy and damp conditions. Towards the weekend an Atlantic depression will follow the next trough as it moves across northern Scotland. This will increase wind speeds and eventually pull in colder air from the north-west behind as it transfers to Scandinavia. This could be the catalyst that affects the jetstream. This week's overall prediction for mid-Teesdale:- high 10°C (50°F), low -1°C (30°F) precipitation 18mm (0.7in), sunshine 24hr, high gust 50mph. Risks:- flooding low, gale medium, frost high, fell-top snow high.The weather seems to be in a pattern of mild weeks and cold weekends at the moment but not much rain this side of the Pennines. Most days will see rain this week with Thursday looking the wettest but it should not be persistent or heavy. The higher fells will see some snow as they did last week.Last week's weather:- Screen temperature 4.5°C (normally 5.2°C) High 10°C(50°F) Thursday. Low -4°C(25°F) Monday. Windiest 42mph Sunday 12th. Precipitation 2mm (norm 20mm). Sunshine 30hr (norm 18hr).The Arctic has suddenly become much colder than normal for the time of year. This is not unusual but these temporary cooling events tend to herald change and we could at last begin to see the end of the fluctuating temperatures and move into the colder spell I mentioned earlier. This is a long way off in Teesdale weather forecasting but worth a mention.Ken Cook’s 12 hourly Teesdale forecasts, http://

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