Updates with more details, CEO comment in paragraph 5, shares in paragraph 7

May 14 (Reuters) - UK's National Grid NG.L missed annual profit expectations on Thursday, weighed by higher costs to repair storm-linked damage across its U.S. business, but reaffirmed its outlook and said there was limited impact from geopolitical and tariff risks.

The British electricity and gas network operator posted an adjusted operating profit of 5.68 billion pounds ($7.68 billion) for the year ended March 31, below a company-compiled consensus estimate of 5.75 billion pounds.

Its storm-related costs rose 7.4% to 636 million pounds for the year.

National Grid has been reshaping its portfolio to focus on regulated electricity and gas networks, including selling its U.S. onshore renewables arm as it ramps up investment in grid infrastructure.

It does not expect major supply chain disruption from tensions in the Middle East, with growth plans unchanged, and has had limited impact from U.S. tariffs as about 90% of procurement for its U.S. business comes from local suppliers, CEO Zoe Yujnovich told Reuters in an interview on Thursday.

The company reaffirmed its 2027 adjusted earnings per share forecast of 13% to 15% growth.

Its shares were up 2.3% at 1,305 pence by 0846 GMT.

($1 = 0.7398 pounds)