For The Arch :
No gale warning.
The reliability of the situation is very good.
Cloud and long sunny periods. No precipitation. In the evening, good clear periods but cloud building.
Light showers. SSE force 1 freshening NW force 3 in the middle of the day then W force 2. Gusts reaching 15 knots in the middle of the day. Smooth sea becoming smooth to slight in the evening. Low, short swell from NW. Excellent visibility.