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Drought monitor shows record-breaking expanse of drought across United States

Date:
July 5, 2012
Source:
University of Nebraska-Lincoln
Summary:
More of the United States is in moderate drought or worse than at any other time in the 12-year history of the U.S. Drought Monitor, officials have said.

US drought map based on analysis of data, last updated July 3, 2012.
Credit: Rich Tinker, Climate Prediction Center, NCEP, NWS, NOAA

More of the United States is in moderate drought or worse than at any other time in the 12-year history of the U.S. Drought Monitor, officials from the National Drought Mitigation Center at the University of Nebraska-Lincoln said July 5.

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Analysis of the latest drought monitor data revealed that 46.84 percent of the nation's land area is in various stages of drought, up from 42.8 percent a week ago. Previous records were 45.87 percent in drought on Aug. 26, 2003, and 45.64 percent on Sept. 10, 2002.

Looking only at the 48 contiguous states, 55.96 percent of the country's land area is in moderate drought or worse -- also the highest percentage on record in that regard, officials said. The previous highs had been 54.79 percent on Aug. 26, 2003, and 54.63 percent on Sept. 10, 2002.

"The recent heat and dryness is catching up with us on a national scale," said Michael J. Hayes, director of the National Drought Mitigation Center. "Now, we have a larger section of the country in these lesser categories of drought than we've previously experienced in the history of the Drought Monitor."

The monitor uses a ranking system that begins at D0 (abnormal dryness) and moves through D1 (moderate drought), D2 (severe drought), D3 (extreme drought) and D4 (exceptional drought).

Moderate drought's telltale signs are some damage to crops and pastures, with streams, reservoirs or wells getting low. At the other end of the scale, exceptional drought includes widespread crop and pasture losses, as well as shortages of water in reservoirs, streams and wells, creating water emergencies. So far, just 8.64 percent of the country is in either extreme or exceptional drought.

"During 2002 and 2003, there were several very significant droughts taking place that had a much greater areal coverage of the more severe and extreme drought categories," Hayes said. "Right now we are seeing pockets of more severe drought, but it is spread out over different parts of the country.

"It's early in the season, though. The potential development is something we will be watching."

The U.S. Drought Monitor is a joint endeavor by the National Drought Mitigation Center at UNL, the National Oceanic and Atmospheric Administration, the U.S. Department of Agriculture and drought observers across the country.

To examine the monitor's current and archived national, regional and state-by-state drought maps and conditions, go to http://droughtmonitor.unl.edu.


Story Source:

The above story is based on materials provided by University of Nebraska-Lincoln. Note: Materials may be edited for content and length.


Cite This Page:

University of Nebraska-Lincoln. "Drought monitor shows record-breaking expanse of drought across United States." ScienceDaily. ScienceDaily, 5 July 2012. <www.sciencedaily.com/releases/2012/07/120705194136.htm>.
University of Nebraska-Lincoln. (2012, July 5). Drought monitor shows record-breaking expanse of drought across United States. ScienceDaily. Retrieved October 30, 2014 from www.sciencedaily.com/releases/2012/07/120705194136.htm
University of Nebraska-Lincoln. "Drought monitor shows record-breaking expanse of drought across United States." ScienceDaily. www.sciencedaily.com/releases/2012/07/120705194136.htm (accessed October 30, 2014).

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