There was a strong westerly wind blowing that day, around 20-25 knots but the object didn't appear to be drifting.
Research showed that the prevailing westerly would blow the pollution out from the city to the Hauraki Gulf and the sea breeze would bring it back again, so for one to three days it would build up until a sou'wester blew it away again.
Because of the westerly winds it just blows back in again, just like all the muck and dust from the building site next door.
In my book, a Sunday afternoon jaunt to report on a game at the westerly outpost could only ever be described as a treat, not a chore.
A light westerly wind blew, gentle as the day, and whipped up the dusts moving them to scattered graves and other surrounding parts of the city.
During more intense El Niño episodes, westerly winds are observed over parts of the equatorial western and central Pacific.
The lane behind and to the north of that last row of houses continues for miles in both the easterly and westerly directions, and it serves to provide two points of entry into that primeval world.
Palawan, the most westerly island of the archipelago is a local name meaning Gate of Combat.
If, for instance, the pressure is low towards Iceland and Greenland and high down by the Azores and Portugal, then most of northern Europe can expect strong westerly winds.
Big black gnats had been brought out by the sunshine and held their place in a stiff westerly by congregating behind a windbreak hedge of double thickness, thorn one side and elder the other.