Old Farmers' Almanac predicted 2008 would be the hottest year in the last 100.
What, hotter than GISS's hottest - 1934. Sorry - Wrong.
Tim Flannery: "Australia's cities will run out of drinking water due to global warming." He predicted Perth would become "the first 21st century ghost city" and that Sydney would run out of water by 2007.
They are laughing at you around the world, Tim.
In 2006, Dr Hoegh-Guldberg warned that high temperatures might kill 30-40% of the coral on the Great Barrier Reef "within a month." Veteran diver Ben Cropp said that in 50 years (diving round the GBR) he'd seen no heat damage to the reef at all.
Many more predictions shot down at wattsupwiththat.com. (Link in title)