Hurricane Isaac’s remnants have combined with another weather front to bring soaking rains that have disrupted air traffic in New York and warm, humid air that may boost energy demand across the U.S. Northeast today.
The rain and clouds have caused delays averaging one hour and 14 minutes at La Guardia Airport in New York, according to the Federal Aviation Administration’s website. One to 3 inches (2.5 to 7.6 centimeters) of rain are possible overnight from northern New Jersey to southern Connecticut including New York City, according to the National Weather Service.
“Higher-than-normal humidity associated with the remnants of Isaac is also helping to keep overnight temperatures muggy, enhancing late-season cooling demand,” said Matt Rogers, president of Commodity Weather Group LLC in Bethesda, Maryland.
As much as 4 inches of rain may fall overnight in Philadelphia and Boston, the weather service said.
Energy use may rise as much as 60 percent above normal for this time of year from Boston to Richmond, Virginia, according to David Salmon, owner of Weather Derivatives in Belton, Missouri.
High nighttime temperatures often drive up energy use as people turn to air conditioners to cool homes and make it more comfortable to sleep. When this happens in the large cities of the East Coast, electricity demand can soar.
In addition to the rain and humidity, large ocean waves are expected to crash into East Coast beaches for the rest of the week from Tropical Storm Leslie, which is about 545 miles (877 kilometers) south-southeast of Bermuda with winds of 65 miles per hour.
Leslie’s tropical-storm-strength winds of at least 39 mph extend about 205 miles from its center, according to the National Hurricane Center in Miami.
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