Commercial Fixed Wing
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Workload; Time Pressure; Distraction; Confusion; Situational Awareness
Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter Weather / Turbulence
General None Reported / Taken
Weather; Human Factors; Procedure
Utilized TAF that Dispatch used to prepare flight release.  (Closest to top of release).  Did not see later TAF that had been changed to require alternate airport for landing.  (Towards bottom of release). Departed ZZZ without required Alternate.OE Training; no flying for last 6 months (COVID-19).Information overload.  Too much material to read before a flight.  Flight release is available to pilots so close to departure time that with all other tasks required; there is limited time available to study flight release; weather; NOTAMs and all available information.  Suggestion:  Make flight info available to pilots 15 minutes earlier.
At the time the task was initially completed; the flight (ETA XA:25Z) did not call for an alternate per the following TAF. WSI RPM tool did not suggest that CIGS or VIS would lower. System was not fully operational with the 8-hour FCST unavailable. The METAR was trending with low CIGS and visibility between 6SM and 10SM with light winds and a 2-3 degree temp/dewpoint split.The updated TAF was not observed prior to the flight departing. I do not recall an 'Alternate Verification Alert' being received. I believe that it was my intention to add a precautionary alternate with the current FOB the aircraft. I feel that there may have been some confusion and I 'lost my place' in my workflow process while juggling flight following; answering phone calls and working the assigned dispatch releases.
Air carrier pilot and Dispatcher reported a required alternate airport was not filed prior to departure.