Winds above 62km/h are considered gale force.
Mr Duncan warned motorists, particularly those planning to travel between Hawke's Bay and Taupo, to exercise caution on roads.
"People driving out of Hawke's Bay need to be aware of severe gusts. Truck drivers watch out, or you'll get blown over again."
Severe gales that hammered the region early this month overturned two trucks, one on the Napier-Hastings Expressway and one on the Napier-Taupo highway, which is notorious for wind gusts.
Mr Duncan expected this week's wild winds to ease on Saturday, which would be "the calmest day of the week," with a pleasant high of 20C.
Sunday would also be "nice, hot and sunny" with a high of 25C - 11C hotter than yesterday's high of just 14C.