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Author Topic: US drought at historic levels  (Read 2352 times)

Offline OhauitiWeather

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US drought at historic levels
« on: July 16, 2012, 08:18:36 PM »
While most of New Zealand has been deluged with rain the last few days, Americans are dealing with exactly the opposite problem.

61% of the lower 48 is now experiencing some type of drought condition.  Over 1/3 of the nation's corn growing land is experiencing a severe drought.  In the largest disaster declaration in history, 1016 counties (districts) spread across 26 states have been named natural-disaster areas.  Also called Federal Disaster Areas, the declaration means they qualify for government assistance including low-interest, emergency loans to farmers and ranchers.



Meanwhile, in a report expected to be released Monday (US Time) , the National Climatic Data Center is expected to announce that this year's drought now ranks among the ten largest drought areas in the past century.  Monday's State of the Climate report is expected to show that since 1895, only the extraordinary droughts of the 1930s and 1950s have covered more land area.

However, if you exclude the “moderate” drought the rankings change a bit.

For example, droughts in 1988, 2000 and 2002 each included over 35% of the the country in the “severe to extreme” categories on the Palmer drought scale.  In June of this year, the “severe to extreme” drought covered 32.7% of the US.



Although different drought measures can rank this drought at different levels, they all agree that the overall drought ranks as the 10th largest severe drought since 1895.

So what does this mean for the world's largest corn producer?

Rich Tinker, the author of the Drought Monitor says 30% of the corn crop in the 18 primary corn-growing states was in poor or very poor condition last week.  That's up from 22% from the previous week.

The record-breaking dry weather comes along side record-breaking heat.  The National Oceanic and Atmospheric Administration (NOAA) says the period from January through June was the warmest first half of any year on record for the lower 48.

And it's not over yet.  There is a little rain in the forecast for the central and midwestern sections of the United States for the upcoming week.  But even if it does happen, it likely to be very little.  Certainly not enough to bust the drought.


Story images/ The Weather Channel

By WeatherWatch Analyst Howard Joseph with contributions from The Weather Channel and CNN
http://www.weatherwatch.co.nz/content/us-drought-historic-levels


David Harris
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Offline Mark

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Re: US drought at historic levels
« Reply #1 on: July 16, 2012, 08:49:11 PM »
The most extensive national drought coverage during the past 100 years (the period of instrumental record) occurred in July 1934 when 80 percent of the contiguous United States was in moderate to extreme drought. Although the current drought and others of the 20th century have been widespread and of lengthy duration, tree ring records indicate that more severe and longer-lasting droughts have occurred in parts of the United States during the past 500 years. The severity of the 1930s drought was likely surpassed by the drought in the 1570s and 1580s over much of the western U.S. and northern Mexico, which lasted several decades in parts of the southwestern U.S.

http://www.noaanews.noaa.gov/stories/s999.htm


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