A cold southwesterly airflow lies over New Zealand today, unstable for some regions. Southwesterlies continue on Tuesday then northwesterlies develop on Wednesday with a front moving into western regions late afternoon / evening.

Blue – Showers about the upper North Island may be heavy with a risk of hail today, perhaps a chance of lightning / thunder also then easing late afternoon or evening.

A few isolated heavy showers with a chance of hail may spring up about the upper South Island this afternoon also, clearing in the evening.

A few snow flurries about the lower South Island to 500 or perhaps 400m at times.

Blue – A light frost to start the day for inland parts of the North and South Islands.

Purple – West to southwesterly winds are strong about western coastlines during the day.