The Forecast Duty Officer's (FDO) Duties:

 
Weather Conditions
Responsibilities
Activities
Severe Weather
Acts as Hurricane Duty Officer nights and weekends.
Sends Alerts to Tower
(eg: fuel shutdown) 
Updates hurricane map after NWS tropical weather discussion
Non-severe Weather
Assists FDO in daytime
Creates TAFs
Creates 6 hr forecasts 
Presents verbal briefings to pilots 

Prepares DD175-1s