NOAA: July 2012 Warmest on Record in U.S.
August 9, 2012 3:08 PM
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The first seven months of 2012 (January to July) were also the warmest of any on record since 1895
National Oceanic and Atmospheric Administration (NOAA) scientists have found that July 2012 was the
hottest month in the history
of U.S. climate records.
The NOAA's National Climatic Data Center reported that the average temperature for the contiguous U.S. during the month of July 2012 was 77.6 degrees Fahrenheit, which is about 3.3 degrees higher than the 20th century average. This means that this was both the hottest July and hottest month in the history of U.S. climate record-keeping, which began in 1895.
According to the report, the warm July temperatures occurred mainly throughout the Midwest, the Plains and the Eastern Seaboard. In July 2012, Virginia experienced its hottest July ever while seven states recorded the month as their second hottest July and another 32 states had it land in their top 10 hottest Julys.
The last warmest July was July 1936, which experienced an average U.S. temperature of 77.4 degrees Fahrenheit.
affected agriculture poorly
, with the contiguous U.S. average of precipitation at 2.57 inches, which is 0.19 inch below average. The May to July period was the second warmest in history and the 12th driest.
The first seven months of 2012 (January to July) were the warmest of any on record since 1895. The national temperature was 56.4 degrees Fahrenheit, which is 4.3 degrees above the long-term average. The first seven months were ranked the 15th driest January-July period too.
The year to date (August 2011-July 2012) was the warmest year on record with the nationally averaged temperature at 56.1 degrees Fahrenheit (3.3 degrees above the long-term average). The last record was broken during the July 2011-June 2012 period.
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RE: So what you're saying is.....
8/9/2012 3:48:03 PM
The thing I question is just how accurate was the equipment before 1990? Especially in 1936, for all we know the mercury or person reading them had bad eyes causing false records....
RE: So what you're saying is.....
8/10/2012 12:22:32 PM
Well, mostly the same equipment is in use now for these measurements. Some of the problems are that measurement stations have been added or moved - and in locations such as the middle of a parking lot, next to A/C units on rooftops, next to BBQ grills, and next to runways at airports.
Check out surfacestations.org for a survey of the climate monitoring network. The vast majority of the stations would have accuracy worse than 2 degrees C, which is 3.6 degrees F.
Many of the stations were once outside a city, but have been enveloped as the city grew, and the average temperature has risen over the years due to the urban heat island effect.
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