A band of fast-moving thunderstorms has swept over Sydney and parts of eastern NSW, briefly drenching and buffeting those caught outside.

The Bureau of Meteorology still has a severe weather warning out for the north-east corner of NSW for destructive winds and large hail stones. It has cancelled a severe weather alert for the Sydney metro area.

Emergency services converged on Kurri Kurri in the Hunter after a community centre partially collapsed during severe weather shortly after 2pm.