Read here. In an obvious effort to promote the political agenda of global warming and the control/regulation/taxing of CO2 emitting fossil fuels, the IPCC, of 'Climategate' fame, chose to make hysterical predictions of weather calamities and disasters due to AGW.
As is well documented, the IPCC predicted that the world would suffer from more frequent and intense precipitation downpours because a warmer atmosphere (due to increased levels of CO2) holds more water vapor. A group of scientists decided to test this theoretical prediction against real world evidence.
Using data from the Hawaiian Island area, Chu et al. determined that instead of heavy downpours becoming more frequent and intense that the IPCC climate models predicted, the opposite was found: less frequent and less intense.
"In a study designed to address this question, Chu et al. write that "for the first time, five climate change indices for extreme precipitation (four related to wetness and one related to dryness) in Hawaii have been calculated," based on "daily observational records from the 1950s to 2007." These specific indices are (1) the simple daily intensity index, (2) the total number of days with precipitation ≥25.4 mm, (3) the annual maximum consecutive 5-day precipitation amount, (4) the fraction of annual total precipitation from events exceeding the 1961-1990 95th percentile, and (5) the number of consecutive dry days.....Chu et al. determined that the precipitation predictions of the IPCC had not only not been realized throughout the part of the Pacific that is home to the Hawaiian Islands, but that just the opposite had occurred there, once again demonstrating the degree to which the climate models employed by the IPCC fail to represent reality." [Chu, P.-S., Chen, Y.R. and Schroeder, T.A. 2010: Journal of Climate]
Additional peer-reviewed postings. More severe-weather and failed-prediction postings.