The 27-year-old, fresh from a season spent out of ski jumping, was first the best of the qualifiers on Saturday in Germany before building on it 24 hours later.
Leading at the halfway stage after producing the second best jump of 138m for a total of 149.6points, Jacobsen broke the 300-point barrier with his second effort.
Jacobsen recorded the joint-best distance of 139m for a winning total of 308.6 ahead of defending Four Hills champion Gregor Schlierenzauer and Severin Freund.
The Norwegian was the best of the qualifiers on Saturday with a leap of 133.5m and led after a head-to-head knockout first round by over five points.
That first round didn’t go by without a high-profile casualty though as Thomas Morgenstern, the Four Hills champion two years ago, was beaten by Ilya Rosliakov.
The standard rose in the second round, which reverted back to the normal order of 30th in the field to first, but the top three remained the same.
With all four rounds of the Four Hills Tournament also acting as a World Cup event, Jacobsen denied Schlierenzauer edging ever closer to Matti Nykanen’s record.
Had Jacobsen not beaten the Austrian on the last jump he would have taken a 44th career win, two behind Nykanen, however he still leads the World Cup standings.
Schlierenzauer finished second with a total of 297 points with Freund scoring 290.8 while Jacobsen’s win was his first individually on the World Cup stage for almost three years.
Jacobsen takes the early lead in the Four Hills Tournament, which has seen an Austrian winner for the past four years, and couldn’t hide his delight with his last win coming in Oberstdorf.
“I was not sure that I would win but I had a good feeling since qualifying,” said Jacobsen, who will move across Germany to Garmisch-Partenkirchen for round two on New Year’s Day.
“My jump in the trial round was good and at the top of the first round I knew I had an opportunity and I said that I was going to take it and have fun and just enjoy it. I did and it was a perfect day.”
- Sports & Recreation
- Gregor Schlierenzauer