North Sails Weather Forecast – Tuesday 26 January

TUE 26 8.45am

High pressure is closer today and very close by tomorrow – both days will have light morning W winds and afternoon N sea breezes.
A front will approach on Thursday – it won’t actually reach BOI area until Thursday night – but ahead, the wind will be a lighter W-NW with another afternoon N-NNW sea breeze – though probably not that robust.
Following the front, Friday will have more SSW-S breeze that will shift a little left in the afternoon to S-SSE.
In the longer term, the threat remains for one of several tropical lows to be drawn south towards NZ next week. The forecast models have backed away from a direct hit and track the first of these lows to the south – but well offshore to the east.

Latest runs this morning from the global models are VERY different; GFS has a low passing close enough to generate E-Sewminds if 30-40 kts over the Gulf whereas the EC model weakens the small low well away and early next week is very soft – only East Cape gets the strong E-SE wind!
But the tropics are flaring up next next and there’s more potential low pressure system to come south!

There is still a good SW gradient wind aloft, but with the overnight cooling across the land, the wind has eased and it generally light from SW-W.
Expect the early W-SW wind to hold for a few hours, then ease back as the N sea breeze comes to the coast and then pushes in across the Bay.
Best N-NNW sea breeze in the mid and later afternoon.

FORECAST (average range tws, no gust)
08 obs WSW-SW/6-10 most areas
10 SW-S-SSE/7-10
12 SSW-SSE/8-4 then variable
14 350-010/10-13
16 340-360/14-17
18 330-350/11-14
20 340-360/5-8

WED 27 (average range tws, no gust)
08 S/5-8
10 light and variable
12 N-NNE/6-9
14 340-360/12-16
16 330-350/13-16
18 330-350/12-15
20 320-340/9-12

THU 28
Soft early to mid morning then a NNW sea breeze but not a stable breeze and likely to start to drift off right in the later afternoon – shifting around to the SE then SSE at night.
FORECAST (average range tws, no gust)
08 S/3-6
10 S-SW/4-7
12 300-330/4-7
14 340-360/11-14
16 330-350/9-12
18 NNW-N-NNE-NE/6-9
20 E-SE/8-11

FRI 29
Front has moved through and the flow is S up along the coast – peaking early to mid afternoon with high teens to 20 kts.
FORECAST (average range tws, no gust)
08 S/13-16
10 170-190/14-17
12 170-190/15-18
14 170-190/17-21
16 160-180/17-21
18 160-180/17-21
20 160-180/16-19