The September precipitation total for the contiguous U.S. A warmer than average September in Alaska contributed to a record warm first nine months of 2016 for the state. average temperature was 57.8☏, 2.8☏ above average, making it the second warmest on record, behind only 2012. ![]() The year-to-date (January-September) contiguous U.S. Record warmth was observed across parts of the Southeast, Midwest, and Mid-Atlantic with below-average temperatures across parts of the interior West. September average temperature was 67.2☏, 2.4☏ above the 20 th century average, making it the ninth warmest September in the 122-year period of record. had ninth warmest September second warmest year to date 4 new billion-dollar disasters bump year-to-date total to 12 1. A normal year is 50 inches, and this year’s total is even running above the monster winters of 1997-83.Significant climate events for September 2016 As of March 5, eight key weather stations from Lake Tahoe to Mount Shasta measured an average of 77.3 inches of precipitation since Oct. So far, the conveyor belt of atmospheric rivers has created the wettest winter ever measured in the Northern Sierra, with precipitation at 180 percent of the historic average. While this water year’s storms have not been as catastrophic as previous winters, the recent rainfall wrecked Oroville Dam’s spillway, flooded downtown San Jose and closed Interstate 80 in the Sierra Nevada under record-breaking blizzards. As of March 2, 2017, 91 percent of the state was no longer in drought condition, according to federal scientists. In March 2016, just 5 percent of California was classified as free from drought. 1, there have been 30 in California, said Marty Ralph, the director of the Center for Western Weather and Water Extremes at UC San Diego.The record precipitation has allowed California to pull out of a five-year drought. In a typical year, California has between 10 to 15 “atmospheric river” storms. ![]() ![]() Pineapple Express storms can be 250 miles wide, 1,000 miles long and carry 20 times as much water as the Mississippi River at its terminus with the Gulf of Mexico. The statewide precipitation values given by NCEI “represent area weighted average of values observed at weather stations across the state,” according to Nina Oakley, a California Climate Specialist with the Western Regional Climate Center, part of NOAA.ĭriving California’s precipitation totals this year was a parade of “Pineapple Express” storms, a type of “atmospheric river” that gets its name from the plume of moisture coming from Hawaii into California. This current water season slightly outpaced 1968-69 (27.34 inches average), when a series of powerful storms in January and February of that rainy season resulted in widespread flooding in Central and Southern California, resulting in at least 60 deaths, according to a federal report. Fueled by a parade of “Pineapple Express” storms, California is in the midst of its wettest water year in 122 years of record-keeping, according to federal scientists.īetween October 2016 and February 2017, California averaged 27.81 inches of precipitation, the highest average since such records began being kept in 1895, according to data released Wednesday by the National Centers for Environmental Information, part of the National Oceanic and Atmospheric Administration.
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