UK GAS-Prices rise on low wind output

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LONDON, July 16 (Reuters) - British wholesale gas prices rose on Monday morning as low wind energy output drove up gas-to-power demand.

* Gas for immediate delivery was up 1.00 pence at 59.00 pence per therm at 0849 GMT

* Gas for day-ahead delivery was 0.65 pence higher at 58.85 p/therm

* "Wind output is still low, continuing the same trend as last week," a UK gas trader said

* Low wind power generation generally translates to more demand for gas from gas-to-power plants

* Peak wind generation is estimated at 2.3 gigawatts on Monday, according to Elexon data, though a forecast was unavailable for Tuesday

* Traders are also monitoring an offshore oil and gas worker strike in Norway, which has widened in size but is not expected to have any immediate extra impact on oil or gas production beyond the closure last week of Shell (LSE: RDSB.L - news) 's Knarr field, which produces 23,900 barrels of oil equivalent per day

* The UK gas system is slightly oversupplied with flows forecast at nearly 186 million cubic metres (mcm) and demand at 180 mcm/day, National Grid (LSE: NG.L - news) data shows

* Norwegian supply through the Langeled pipeline is forecast at 45 mcm/d and UK domestic production at 99 mcm/d, Thomson Reuters (Dusseldorf: TOC.DU - news) Eikon data shows

* The average daily temperature in Britain is forecast at 19.3 degrees Celsius on Monday, falling to 17.3 degrees C on Tuesday

* The August contract was 0.45 pence higher at 58.45 p/therm

* In the Dutch gas market, the day-ahead TTF price was 0.12 euro higher at 22.60 euros per megawatt hour

* The Nordstream pipeline will close for maintenance on July 17 for two weeks, as well as concern about low water levels on the Rhine, a shipping route for coal to land-locked German coal-to-power stations.

* The benchmark Dec (Shanghai: 600875.SS - news) -18 EU carbon price was 0.16 euro higher at 16.22 euros a tonne (Reporting by Nina Chestney)