Playing with a big breeze at their backs, Hawke's Bay produced probably their best half of the season but led only 11-3 at the halftime break, with West's charge-down try and two penalties representing his side's scoring in the first 40 minutes.
For all their positive running, though, the Magpies lacked a little accuracy and were also missing a clinical edge that could have put away their opponents, creating more chance than Auckland but eventually left to rue their profligacy.
The visitors were initially unable to offer much more than Simon Hickey's accuracy from the tee and, midway through the half, their hole became deeper when Mark Abbot busted through to score his side's second try and convert pressure into points.
But falling further behind only sparked Auckland's resurgence, as first Greg Pleasants-Tate and then Vince Aso scored in the left corner to pull Auckland within touching distance. And after missing the sideline conversions, Hickey nailed a routine penalty that would prove the difference, although the visitors were still left holding their breaths as West erred in the final moments.
Hawke's Bay 24 (I. West, M. Abbott tries; I. West 4 pens, con)
Auckland 25 (G. Pleasants-Tate, V. Aso tries; S. Hickey 5 pens)
Halftime: 11-3