Engineers in Portsmouth are hoping their new satellite will be launched safely into space later today. The Astrium equipment should help predict the weather more accurately.
The launch is taking place at the Baikonur Cosmodrome in the deserts of Kazakhstan.
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Any lingering showers clearing into tonight with a mostly dry but chilly night ahead. A cool but sunny start to Sunday.
Further heavy showers gradually clearing away this evening. Dry but chilly tonight, then dry with plenty of sunshine tomorrow.
Heavy showers turning potentially thundery this afternoon. Becoming dry but chilly tonight, then dry and sunny tomorrow.