MetService issued the advisory today, saying southwesterly winds will push a cooler airmass across the country, resulting in snow on some higher roads.
Southland's Milford Road is forecast to get up 12cm of snow, while other passes will be affected by snow showers for a time from overnight and into Friday.
Milford Road (SH94)
From 10pm on Thursday until 9am on Friday:
Snow expected to affect the road above about 500 metres overnight and in the morning. Expect 8cm to 12cm to accumulate above 700 metres, with lesser amounts down to about 500 metres.
Crown Range Road
(linking Queenstown and Wanaka)
From 11pm on Thursday until 11am on Friday:
Snow showers expected to affect the road above about 700 metres overnight and again during Friday morning. 1cm to 2cm of snow may accumulate at times.
Lindis Pass (SH8)
From 2am to 3pm on Friday:
Snow showers may affect the road above about 700 metres before dawn and again late morning and early afternoon. 1cm to 2cm of snow may accumulate at times.
Haast Pass (SH6)
From 3am to 7am on Friday:
Snow showers may affect the summit of the road early in the morning and 1 cm of snow may accumulate.
Arthur's Pass (SH73)
From 4am to 7am on Friday:
Snow showers may affect the road near the summit for a time early in the morning, and 2cm to 3cm of snow may accumulate.
