Edit: unless the Astral Plane allows free movement. If that's the case, I'll not cast that spell.
Subjective gravity.
Effectively everyone has walking speed of (3 x Int) rounded to the nearest 5, in any direction.
That said, see below for the effects of the storm.
Heroe's Feast: 2d10 (8, 6) = 14
Roger.
-------
The Bard and the Cleric -despite their poor attempts - both motivate the crew - you can both have
inspiration. At least you were trying!
The ship pulls towards the Dead God, the storm getting ever closer as the winds, visibility and the psychic murmuring in your heads all worsen.
As you close to within a few hundred feet of the fossilized dead deity to shelter from the storm, you all spot a strange thing indeed (and it's been a day for strange things!).
A Large Red Dragon, bearing a rider in ornate Silver Full Plate, and an equally ornate Silver greatsword, circles over the petrified remains and perches there, in a sheltered area of the mummified corpse. At the same time, another Astral Ship, smaller than your vessel, but moving much quicker also crests the Dead God, on a heading straight for you!
On board the smaller faster ship you see several yellow skinned humanoid creatures bearing Greatswords and also wearing ornate armor. A bedraggled and forlorn yellow skinned humanoid with a tattered red mohawk steers the vessel from some glowing orb device that is surely the helm located at the rear of the ship. Unlike the rest, he bears no weapons or armor.
A final yellow skinned creature, in more ornate plate than the others, a shield and a sword in hand, but otherwise identical in appearance to the helmsman (down to the red mohawk), stands on the front of the ship. He motions and barks orders to the others. Flitting around him are identical copies making him hard to single out, and a glowing blue transparent globe of magic also emanates from him, covering him completely.
Grogbeard tries to turn the ship around, but to no avail; the storm is behind him and ship will not turn. The smaller ship is much faster and will be on you in a matter of a round or two!
Despite this, the Dragon (and its rider) seem content to sit back, and watch... for the time being at least.
----------------------------------
Current conditions are:
Heavy wind and
Dim light. Ranged weapon attacks are at disadvantage, and due to the gloom and wind, so are Perception checks relying on sight and sound (so most of them). Non-magical flight is impossible, and the strong wind is treated as difficult terrain for flying creatures that rely on magic, and precludes astral travel NOT anchored to anything (i.e. with 'down' being a solid surface).
Lets
roll initiative at this point; the bad guys are around 200' away and closing fast; they'll be on you at the start of round 2.