南加州周六红旗警报：圣安娜风阵风可达65英里，湿度低至10%
美国国家气象局圣迭戈办公室对加州南部内陆地区发布红旗警报，生效时间为周六（11月7日）凌晨1时至晚间10时（太平洋时间），范围涵盖圣贝纳迪诺县与河滨县的谷地和山区、内陆帝国地区、圣安娜山脉及山麓地带，以及班宁附近的圣戈尔戈尼奥山口一带。
气象局预计，警报时段内东北风风速20至30英里/小时，阵风45至55英里/小时，山口、峡谷和山麓等迎风地带局地阵风可达65英里/小时；周六空气湿度将降至10%至15%。气象局表示，这样的组合意味着任何新起的火情都可能快速蔓延，呼吁居民避免在户外用火，并对车辆拖链、户外作业设备、烟蒂等一切可能产生火花的来源保持警惕。
红旗警报是国家气象局在火灾天气条件达到临界水平时发布的火险警示。南加州秋冬季的圣安娜风由内陆高气压驱动，空气翻山下沉后变得干热，是当地一年中火险最高的天气型态之一。气象局提醒居民提前清理房屋周边的可燃物，熟悉撤离路线，并留意地方消防部门的最新通告。（来源：美国国家气象局）
Red Flag Warning for Southern California on Saturday: Santa Ana Gusts to 65 mph, Humidity as Low as 10%
The National Weather Service office in San Diego has issued a Red Flag Warning for inland Southern California from 1 a.m. to 10 p.m. Pacific Time on Saturday, November 7, covering the valleys and mountains of San Bernardino and Riverside counties, the Inland Empire, the Santa Ana Mountains and foothills, and the San Gorgonio Pass area near Banning.
Forecasters expect northeast winds of 20 to 30 mph with gusts of 45 to 55 mph during the warning period, with isolated gusts to 65 mph in wind-prone passes, canyons and foothills, while humidity falls to 10 to 15 percent on Saturday. The Weather Service says that combination means any fire that starts could spread rapidly, and urges residents to avoid outdoor burning and to be careful with anything that could spark a fire, including vehicle tow chains, outdoor power equipment and cigarettes.
A Red Flag Warning is issued when fire weather conditions reach critical levels. Southern California's fall and winter Santa Ana winds, driven by inland high pressure and heated as the air descends from the mountains, produce one of the most dangerous fire weather patterns of the year. Residents are advised to clear flammable material from around their homes, know their evacuation routes, and follow updates from local fire agencies. (Source: National Weather Service)
来源：美国国家气象局
发布：GSM·美国（发布链接）
图片来源：图片来源：美国林务局野外消防员（U.S. Forest Service 摄，Wikimedia Commons，Public domain） / Image: A U.S. Forest Service wildland firefighter, by U.S. Forest Service, Wikimedia Commons (Public domain)
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