What a flight to Guam congratulations!! My story for the next leg
1) Departure still rain and a steady wind of 180/200deg 25-29kt up to 14000ft.
2) This should clear 2-3 hours into the flight with the majority of the middle cloud left of track.
3) Head wind all the way starting at 160/12 and closer to destination 085/17
4) Freezing level 16,000ft
5) Spot graphs indicating more rain ½ way with cloud top at 12,000ft. Low cloud expected for the last 200 nm at 2500ft clearing at 10,000ft with rain. At destination the possibility of rain winds 064/15 with CBs
6) There are storms moving in from the south toward the Marshall Island but hopefully it would have cleared on arrival.
7) With the forecast winds I estimate the flight to be 17h20m working on 105kt calculation
8) Storms left track is moving north-east although there are part of it moving south that are less in intensity expect rain below 22,000ft. There is a storm developing left and right of track 250nm from the Marshall Islands moving in from the north and south with winds up to 20 kts.. http://www.goes.noaa.gov/guam/guamloops/guamircolor.html
Have a safe flight, regards to Jean.