Farmers are bracing themselves for another dumping of snow and motorists are being warned to take care as another low moves over NZ.

A band of cold and wet weather is set to cover the country from tomorrow.

This week's snow storm could have killed up to 200 lambs on each Hawkes Bay hill country farm affected, Federated Farmers says.

Police say the Napier-Taupo highway will stay closed until all of the abandoned cars have been removed.

Two major highways may re-open this afternoon after unseasonal heavy snow in the last two days stranded motorists for two nights.

What seems to have gone majorly wrong is communication, and that's no small problem, reports Catherine Masters.

The Government has ordered a review after deeming New Zealand's response to yesterday's tsunami "not good enough".