North East West passage: forecast 4 Sept - day 53
Posted in North East West passage | By Marc |
On the synoptic map of this morning 0600utc you can see the powerful high pressure cell (or anticyclone) with a ridge extending towards the Chukchi Sea. At the same time over the Bering Sea there is a complex low pressure area with a convergence line. In between the former and the latter there is a strong Easterly windfield along the North coast of Alaska. Click on the map to see the full display.
Summarized weather forecast for the North East West passage -04 Spt- day 53
General situation
The main player on the field is and remains the high pressure cell situated over the Beaufort Sea. The center of this pressure system is this morning at 0600utc situated at 76.7/-136.5. A ridge (or an extension of a high pressure cell) stretches out Westwards to the Chukchi Sea. Along the Southern flank of this ridge a pretty strong Easterly is maintained during this period. Local and small scale conditions may alter that wind a little: the first few hours from now the wind veers to the SSE due to a developing convergence line over the C-sea. This will only last for 6, maximum 9 hours before the wind drops and turns back to the East or Northeast after 21/24utc (today).
(All forecasted winds are average values).
Day 1: 04 Sept
Weather: very cloudy with some short sunny spells. Later increasing cloudiness and more risk for a showery outbreak.
Wind: between 6 and 12utc wind veers to 150-170°6-12kt, after 18utc becoming calm and after 21/24utv turning to 040-060°5-10kt.
Day 2: 05 Sept
Weather: sunny spells with scattered cloud. Mainly dry.
Wind: after 6utc becoming 070-090°8-13kt (close along the coast) further in sea you can add 5-10kt.
Day 3: 06 Sept
Weather: sunny and dry.
Wind: 090-110°8-13kt, no significant change. After 24utc gradually increasing.
Day 4: 07 Sept
Weather: increasing cloudiness.
Wind: mainly 100-120°15-20kt