Chance of U.S. drought seen; food squeeze feared
By Ayesha Rascoe - Analysis
WASHINGTON (Reuters) - The U.S. Midwest has enjoyed nearly 20 years without a major drought but forecasters worry the corn belt's luck could dry up this year, further squeezing tight global supplies amid soaring food prices.
With its last major drought in 1988, the Midwest has reached its average span of 18.6 years between droughts.
Considering that statistic and current weather conditions, Iowa State University extension climatologist Elwynn Taylor said the corn belt has a one in three chance of drought this year.
"We do have to be prepared," Taylor said. "A 33 percent chance is high, that's a risk."
The Midwest's chances of drought are exacerbated by La Nina, an unusual cooling of Pacific Ocean surface temperatures that can trigger widespread changes in global weather patterns. If La Nina has not dissipated by July, Taylor saw a 70 percent chance for U.S. corn yields below the 30-year trend of 150.6 bushels per acre.
"We don't have any reason to think La Nina causes drought, but it certainly does aggravate it," Taylor said.
Drought is not a foregone conclusion for the Midwest, where excessive wetness has held up spring corn plantings. Crops may benefit from that extra soil moisture during a dry summer, said Brad Rippey, a U.S. Department of Agriculture meteorologist.
"It's way too soon to have any great alarm," Rippey said. Continued...
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