NOTICE: All of our websites and FTP areas (ncdc.noaa.gov, ncei.noaa.gov, climate.gov, toolkit.climate.gov, and drought.gov) are undergoing routine maintenance and will be temporarily unavailable from 4:00 PM on Tuesday, Dec 6 until approximately 1:00 AM on Wednesday, Dec 7 (EST). We apologize for this inconvenience.
Browse by Month
- Department:May 6, 2011
The tornado outbreak across the southern United States in late April 2011 was deadly, devastating, and record breaking. NOAA's "CSI" team is investigating the possible connections between global warming, natural climate patterns, and tornadoes.