During last month's Winter Games, Jarvis (23) was the first New Zealand woman in both the slalom and giant slalom in a world-class field of competitors.
Jarvis was already on a high after winning the New Zealand giant slalom crown on Friday.
Charline Vion, of France, won the slalom in 1min 42.92sec, with Aleksandra Klus, of Poland, second in 1min 44.29sec, and Czech Tereza Kmochova third in 1min 44.71sec.
Jarvis finished fifth overall in 1min 48.64sec, improving on her time in the same event at the Winter Games, when she finished in 1min 54.13sec.
Speaking to the Otago Daily Times from Methven yesterday, Jarvis said she was "pretty stoked" with the results.
"In the giant slalom I had a better time than I did at the Winter Games and [had] a similar points result.
"The slalom I had one terrible run and one good one - I had a bit of both - it was quite challenging."
The results had improved Jarvis' world ranking again - which was 500 prior to the Winter Games - but she was not sure what that ranking was now.
A fresh snowfall, combined with clear, calm conditions meant it was the "perfect" environment to race in, she said.
Auckland's Monique Oosterbaan was the second-fastest New Zealander, clocking 1min 54.41sec and finishing 12th overall.
Harriet Miller-Brown, of Queenstown, was the third-fastest New Zealander, 13th overall in 1min 56.01sec.
Wellington-raised Angus Howden, the first New Zealander home in 13th place, was crowned national men's slalom champion..
The race was won by Canadian Julien Cousineau in 1min 27.88sec, followed by Leif Kristian Haugen (Norway) in 1min 28.34sec.
Patrick Biggs (Canada) secured bronze in 1:29.22.
Howden was pleased with his 1min 34.81sec over what he described as a challenging course.
Queenstown's Andrew Wiley was the second-fastest New Zealander, clocking 1:36.15 to finish 16th overall while national development team member Finlay Neeson (Taranaki) was the third-fastest New Zealander, finishing 19th in 1min 38.43sec.
Today, the action moves to Methven for the national super G championships, followed by four days of Australia New Zealand Cup races.
