(NaturalNews) The National Oceanic and Atmospheric Administration (NOAA)
has announced that 2012 was not just the hottest year on record for the contiguous United States, but also had the second most "extreme" weather in recorded history.
Extreme weather was calculated using the U.S. Climate Extremes Index, which generates a numerical score based on extremes in temperature, precipitation and landfalling tropical cyclones. The 2012 score was nearly 100 percent higher than average, and was surpassed only by 1998.
Every state hotter than average
The overall average yearly temperature for 2012 was 55.3°F, surpassing the 20th century average by 3.2°. It surpassed the prior record hottest year, 1998, by 1.0°. Annual temperatures were above average in every one of the contiguous states. In 19 states, 2012 was the hottest year ever recorded; in 26 states, it was the second hottest.
In fact, every single season in 2012 was hotter than average. The year began with the fourth warmest winter ever recorded, which led to the third smallest snow cover on record. Across the central and southern Rocky Mountains, in fact, snowpack totals were lower than 50 percent of normal. Low levels and retention of snowfall meant less available water later in the year.
Winter turned to spring with the warmest March ever recorded. Spring temperatures averaged 5.2° higher than normal, making it the hottest spring on record by a whopping 2.0°. This produced an early starting growing season, which led to early depletion of water from soil and laid the groundwork for a coming historic drought
. Temperatures continued to break records in the summer, and July was actually the hottest month ever recorded in the contiguous United States, with an average temperature of 76.9° (3.6° higher than average). Autumn, too, was hotter than average.
Overall, 99.1 million people, nearly one-third the U.S. population, experienced 10 or more days of weather hotter than 100° this past year.
Extreme drought, extreme storms
Every season of 2012 experienced lower-than-average precipitation. A severe drought hit in full force during the summer, with 61 percent of the contiguous United States affected in July. Yearly rainfall ended up being 2.57 inches below average, for the 15th driest year ever recorded. The dry weather fueled the third-largest wildfire season on record, with 9.2 million acres burned.
According to the NOAA report, the 2012
drought was roughly equivalent in footprint to that of the 1950s. Yet it failed to reach the intensity or duration of that drought, or of the devastating drought of the 1930s.
The number of North Atlantic tropical cyclones in 2012 was above average, with 19 named storms, 10 hurricanes, and one hurricane above Category 2. Therefore, 2012 tied with both 2011 and 2010 as the third-most-active tropical cyclone year on record.
The only extreme weather
that put in a lower-than-usual showing in 2012 was tornadoes. The contiguous states experienced approximately 1,000 tornadoes in 2012, well below the average of roughly 1,200.
Overall, the year was marked by 11 weather-induced disasters that caused at least $1 billion in damage.
Sources for this article include:http://www.sciencedaily.com/releases/2013/01/130108131149.htm