LONDON, Jan 19 (Reuters) - Northwest European diesel barge margins rose to near $16 a barrel on Wednesday on tightening supplies in the region and cold weather that has boosted demand. Diesel prices have risen in recent days due to tighter supplies, lower imports and colder weather in the region, traders said. Diesel imports from Asia and the Middle East into Europe were set to drop sharply this week, with just one tanker with a 42,000 tonne cargo set to discharge, compared with 320,000 tonnes last week, according to Refinitiv analysts. China"s diesel exports in December slumped to 330,000 tonnes, the lowest monthly level since March 2015, amid diminishing export quotas and as refiners curbed runs in response to a slowdown in domestic demand, data showed on Tuesday. read more Oil prices rose for a fourth day on Wednesday after a fire on a pipeline from Iraq to Turkey briefly stopped flows, increasing concerns about an already tight short term supply outlook. Trades Bids Offers Previous Session Seller Buyer 0.1 GO Barge diffs fob ARA per tonne 0.1 GO Cargo diffs cif NWE per tonne 1 cargo Feb -$1 (Le Havre) Vitol Total 0.1 GO Cargo diffs cif Med per tonne 50ppm barge diffs fob ARA per tonne Feb -$1.50 (3KT) Diesel Trades Bids Offers Previous Session Seller Buyer Diesel barge diffs fob ARA Per tonne Feb +$6-$6.50 Feb +$6-$6.50 (8.4 KT) Vitol BP, Mabanaft Diesel cargo diffs cif NWE Per tonne Feb +$2 (Amsterdam) Feb +$7-$8 (Le Havre) Feb +$3 (Hamburg) Diesel cargo diffs cif Med per tonne Feb +$7 (Lavera) Jet fuel Trades Bids Offers Previous Session Seller Buyer Jet fuel barge diffs fob FARAG per tonne Jet fuel cargo cif NWE per tonne Feb +$43 (Rotterdam) Feb +$60-$61 (Le Havre) Fuel Oil Trades Bids Offers Previous Session Sell Buy 0.5% barge fob ARA per tonne $636-$637 $630 3.5% barge fob ARA per tonne $471.25-$474.50 ICE Low Sulphur Gasoil Diesel ARA Barge Crack(per barrel) Diesel spread email: ron.bousso@thomsonreuters.com Twitter: https://twitter.com/ronbousso1 Tel.: +44 (0)207 542 2161 Reuters Messaging: ))