I fail to see how weather could cause such a severe nose pitch up. Thunderstorms in the area? Can't see any from the vid. A wind shift wouldn't cause this either.
While BAF has the craziest winds that a pilot could experience, this isn't the time of the year for it. The "120 days of wind" starts in late June and goes until September. During that time there is an almost constant 35-45 kt wind blowing. Strong crosswinds, blowing dust, and turbulence is a daily occurrence. Even then, a steady stream of ops goes on day and night.