A wind barb indicates the wind direction and speed

Wind barbs point in the direction 'from' which the wind is blowing. In this case, the orientation of the wind barb indicates winds from the Northeast.

As for the four smaller barbs on the end, each long barb represents 10 knots of wind, and the short barb, 5 knots. In total the wind barb represents 35 knots of wind (10+10+10+5).

Mariners often use an empirical measure called the Beaufort wind force scale that relates wind speed to observed conditions at sea. A Beaufort force 8 is described as a Gale, which represent wind speeds between 34-40 knots, hence the 35 knots represented on the wind barb.