We’re well aware of the concerns about dust being blown around during a period of stronger winds expected in the Christchurch area from later Tuesday to later Wednesday.
As explained in yesterday’s blog about this, Christchurch city is not expected to be subjected to the severe gales forecast for the Canterbury foothills and over higher parts of Banks Peninsula.
Here’s the most recent issue (11:43am) of the forecasts for Tuesday and Wednesday that we’re providing to those involved in the emergency response. It has as much detail as we can sensibly provide in a worded forecast about the winds and potential for dust.
Tuesday – 01 March 2011
Extensive high cloud. Possibly a few spots of rain late afternoon or evening but probably not enough to wet the ground.
Northeast rising 30 km/h gusts 45 km/h this afternoon, rising to 40 km/h gusts 55 km/h this evening and 45 km/h gusts 65 km/h tonight. Northeast winds could start raising dust from this afternoon.
Rainfall amount: Nil
Maximum temperature 23C
Minimum temperature overnight 18C
Wednesday – 02 March 2011
High cloud. Brief rain around dawn, then skies clearing and becoming fine late morning.
Northerly 45 km/h gusts 65 km/h turning northwest about dawn. Westerly may rise to 55 km/h gusts 80 km/h at times from late morning to early afternoon. Winds easing to westerly 30 km/h late afternoon and winds easing to 10 km/h in the evening. These strong winds during the day may raise clouds of swirling dust.
Note that winds will be stronger about the higher parts of the Port Hills with northwest gales gusting 110 km/h during the morning.
Rainfall amount: 2-5mm
Maximum temperature 27C
Minimum temperature overnight 9C