Wednesday's rainfall a 'once in a 200-year' weather event, climatologists say

Several weather records were broken Wednesday after 13.27 inches of rain fell at Islip Town's Long Island MacArthur Airport in what the Northeast Regional Climate Center calls a 24-hour 200-year storm event.

That means that "rainfall of this magnitude is only expected to occur once in a 200-year period," according to the center's website.

At play was a complex weather system that the National Weather Service had been monitoring for days, warning of the threat of flash flooding, in which an upper level disturbance, a low pressure area at the surface and very moist environment all combined over the area, said Tim Morrin, weather service meteorologist in Upton.

The "bull's-eye" of the heaviest rainfall that deluged an area of western Suffolk was right near MacArthur Airport, he said.

"A very small micro-scale event took place" in that area, one that is yet to be explained, he said, but that will likely be researched extensively, with follow-up papers written. Such a phenomenon is "impossible to forecast," he said, as "there's not enough skill in the computer models to pinpoint that kind of extreme" on such a small scale.

As for hourly rainfall, 5.34 inches fell from 5 to 6 a.m. Wednesday at the airport in Ronkonkoma, followed by another 4.37 inches from 6 to 7 a.m., according to the Climate Center. They may have come back-to-back, but each is considered a 500-year event, said Jessica Spaccio, a climatologist with the center, which is at Cornell University.

Records were also broken, and, "when we break a state record, that's pretty exciting," Spaccio said

According to a preliminary report from the weather service, the previous New York State record for precipitation in a 24-hour period was broken. That was set Aug. 27 to 28, 2011, in Tannersville when 11.6 inches fell during what the service referred to as Hurricane/Tropical Storm Irene.

With half the month still to go, Wednesday's rainfall also resulted in a record for the month of August, previously 13.78 inches set in 1990, the weather service said. The airport's August rainfall now stands at 13.88 inches, said the weather service, which has maintained official records for the airport for the past 30 years.

While Long Island has been considered "abnormally dry" this year by the U.S. Drought Monitor, the 13.27 inches at the airport in just about one day exceeded normal rainfall for June, July and August combined -- 11.68 inches -- based on precipitation records from 1981 to 2010, according to the Climate Center.

Wednesday's rainfall also broke the airport's all-time daily rainfall record, which was 6.74 inches set Aug. 24, 1990, Spaccio said.

And as for the record rainfall for Aug. 13 -- beating that was a piece of cake, with the previous record for that day 0.91 inches, set in 2013, the weather service said.

As for hourly rainfall amounts -- top honors now go to Wednesday from 5 to 6 a.m. when 5.34 inches fell at the airport, followed by 4.37 inches the very next hour, Spaccio said. The highest previous amount was 2.64 inches, which fell in one hour on July 18, 2007. That's based on data maintained since July 1996, she said. More

 

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Farmers worldwide suffer as extreme weather wreaks food havoc

To address the crisis, farm ministers from around the world are gathering in Berlin Saturday to discuss climate change and food production.

BOSTON — Volatile weather around the world is taking farmers on a wild ride. Too much rain in northern China damaged crops in May, three years after too little rain turned the world’s second-biggest corn producer into a net importer of the grain. Dry weather in the U.S. will cut beef output from the world’s biggest producer to the lowest level since 1994, following 2013’s bumper corn crop, which pushed America’s inventory up 30 percent. British farmers couldn’t plant in muddy fields after the second-wettest year on record in 2012 dented the nation’s wheat production.

“Extreme weather events are a massive risk to agriculture,” said Peter Kendall, president of the British National Farmers Union, who raises 3,953 acres of grain crops in Bedfordshire, England. “Farmers can adapt to gradual temperature increases, but extreme weather events have the potential to completely undermine production. It could be drought, it could be too much rain, it could be extreme heat at the wrong time. It’s the extreme that does the damage.”

Farm ministers from around the world are gathering in Berlin Saturday to discuss climate change and food production at an annual agricultural forum, with a joint statement planned after the meeting.

Fast-changing weather patterns, such as the invasion of Arctic air that pushed the mercury in New York from an unseasonably warm 55 degrees Fahrenheit on Jan. 6 to a record low of 4 the next day, will only become more commonplace, according to the New York-based Insurance Information Institute. While the world produces enough to provide its 7 billion people with roughly 2,700 calories daily, and hunger across the globe is declining, one in eight people still don’t get enough to eat, some of which can be blamed on drought, the United Nations said.

“There’s no question, while there’s variability and volatility from year to year, the number and the cost of catastrophic weather events is on the rise, not just in the U.S., but on a global scale,” said Robert Hartwig, an economist and president of the insurance institute. “It’s all but certain that the size and the magnitude and the frequency of disaster losses in the future is going to be larger than what we see today.”

The number of weather events and earthquakes resulting in insured losses climbed last year to 880, 40 percent higher than the average of the last 30 years, according to Munich Re, the world’s largest reinsurer.

Research points to a culprit: an increase in greenhouse gases, generated by human activity, that are forcing global temperatures upward, said Thomas Peterson, principal scientist at the U.S. National Climatic Data Center in Asheville, N.C. The warmer the air the more water it can hold, he said.

“What we’re finding worldwide is that heavy precipitation is increasing,” Peterson said.

Flood waters in Passau, Germany, in May and June reached the highest level since 1501, Munich Re said. That was the year Michelangelo first put a chisel to the block of marble that would become his sculpture of David. High water did $15.2 billion in damage in parts of Central and Eastern Europe, according to Munich Re.

A July hailstorm in Reutlingen, Germany, led to $3.7 billion in insured losses, according to Munich Re. Hailstones the size of babies’ fists cracked the windshield of Marco Kaschuba’s Peugeot.

“Two minutes before the storm started you could already hear a very loud noise,” said Kaschuba, a 33-year-old photographer. “That was from hailstones hitting the ground in the distance and coming closer.”

In 2012, Britain had its second-highest rainfall going back to 1910, according to Britain’s meteorology office. England and Wales had its third-wettest year since 1766. More