旧金山湾区：本周迎秋季首轮降雨，气象局预报周三清晨旧金山见小雨
位于加利福尼亚州的旧金山湾区本周将迎来秋季首轮降雨。国家气象局（National Weather Service，NWS）表示，一个切断低压系统正从太平洋移入并在湾区上空驻留，周二中央海岸先有阵雨，随后雨带北移进入湾区，降雨至少持续到周四早上，天气同时转凉。气象学家 Matt Mehle 表示，湾区普遍降雨量约在0.05至0.15英寸之间，Santa Cruz 山脉与东湾部分地区可达0.25英寸，周三早上旧金山居民醒来时可能会看到小雨；他指出，虽然雨量不大，但这是湾区几个月来的第一场雨。再往南，中央海岸雨量可达0.75英寸，出现雷暴的概率较低。气象局同时提醒，强降雨可能使 Big Sur 附近野火火烧迹地面临山洪与泥石流风险，居住在火烧迹地下坡处的居民应留意官方预报。（GSM 据国家气象局预报讨论）
San Francisco Bay Area: First Fall Rain Arrives This Week, With Light Showers Expected in San Francisco Wednesday Morning
In California's San Francisco Bay Area, the first rain of the fall is arriving this week. The National Weather Service (NWS) said a cut-off low-pressure system is moving in from the Pacific and stalling over the Bay Area: showers reach the Central Coast first on Tuesday, then move north into the Bay Area, with rain lasting at least through Thursday morning and cooler temperatures. Meteorologist Matt Mehle said most of the Bay Area can expect about 0.05 to 0.15 inch of rain, with up to 0.25 inch in the Santa Cruz Mountains and parts of the East Bay, and San Francisco residents may wake to light rain on Wednesday; he noted it is the region's first rain in months. Farther south, the Central Coast could see up to 0.75 inch, with a low chance of thunderstorms. The Weather Service also warned that heavy rain could bring flash flooding and debris flows over wildfire burn scars near Big Sur, and residents downslope of burn areas should monitor official forecasts. (GSM, based on the National Weather Service forecast discussion)
来源：GSM·美国（原文链接）
图片来源：Wikimedia Commons 文件 Rain in San Francisco (52763545068).jpg，CC BY-SA 2.0（代表性图片）
GSM Global · 本篇英文版 English edition of this story
