An enormous explosion and firey streak were seen in the sky over San Francisco on Tuesday evening at approximately 5:40pm.  The explosion and resulting clouds were so bright they were witnessed as far away as Southern California, and all the way to Lake Tahoe.  Thousands of observers posted images and questions

July in San Francisco is famous for being full of fog, wind, and tourists from Wisconsin buying several ‘I Heart SF‘ windbreakers and huddling together for warmth in a Peet’s Coffee.  If you’ve lived in San Francisco long, you may have noticed that the last two summers have been surprisingly…not freezing cold.  I live