Feeling a little gassy now that Thanksgiving has come and gone? Not if you're an engineer -- because gas clouds (as well as other types of clouds) are curiously nowhere to be found. At the time of this post , the disappearance of felmist, windy cloud, swamp gas and arcane vortex spawns was being widely and dramatically mourned by engineers. Engineers have been busily harvesting the clouds for motes since patch 2.3, when their handy-dandy Ultra-Spectropic Detection Goggles (which require Engineering  to equip) began showing the location of nearby clouds on the minimap.
Where did all the clouds go? Apparently, something significant changed when the servers reset for the debut of Arena Season 3. After the initial round of harvesting (when many engineers reported successful sweeps of their regular extracting routes), the clouds stopped respawning. Many players report seeing what appear to be the shadows of the clouds -- but alas, no clouds to actually cast the shadows.
Just as engineers were beginning to enjoy the fruits of their labors extracting motes with their Zapthrottle Mote Extractors, the outlook seems to have turned ... well, decidedly uncloudy. Engineers are clamoring for a blue response on both the profession and bug forums alike, but no official response has yet been posted. Most in-game petitioners have been told that the situation was working as intended, and several players report email replies indicating that Blizzard is aware of and investigating the "situation." So no, your goggles aren't broken -- stay tuned to the official forums for possible updates!
Read on for tips on spotting pure water pools and a handy way to search for crafted items that have had stat updates in patch 2.3.