一系列风暴中的第一场将在圣诞节假期一夜之间给南加州带来雨和雪。随着冬季风暴向南移动，预计冬季风暴将变得更强，在洛杉矶、Orange、San Bernardino 和 Riverside 县带来大雨。根据国家气象局的数据，周日沿海和山谷地区将有 1.5 至 3 英吋的降雨，山区和山麓的居民预计会有 3 到 6 英吋的降雨。预计第二个风暴系统在周末到达之前，该地区将出现最强的阵雨。
Here's the latest forecast precipitation totals through Christmas afternoon. Biggest impact will be on the roadways. Travel safe this Holiday weekend! #CAwx #LArain pic.twitter.com/ABqaJlXqBR
— NWS Los Angeles (@NWSLosAngeles) December 22, 2021
降雪量将从高处开始，直到周四预计将超过 8,000 英尺。根据气象局的数据，到周五，这些雪量将下降至 4,500 英尺，到周日将进一步降至 4,000 英尺。官员们提醒司机，在山路上行驶时需要装上雪链。官员们还将密切关注 5 号高速公路，以防 Grapevine 地区周末降雪。
Winter is coming! Snowfall is expected through the weekend near 4000' feet. That will make many roads and trails in the #AngelesNF extremely dangerous to drive and hike. Please have a plan that includes proper gear (crampons), extra food & water, and plenty of gas and snow chains pic.twitter.com/XeJ1MbaoP4
— Angeles National Forest (@Angeles_NF) December 22, 2021
虽然降雨对旱灾地区来说很受欢迎，但官员们担心大雨在最近燃烧过的地区造成泥浆和岩石崩塌，目前已经为 Bond Fire 和 El Dorado Fire 燃烧区附近的居民发出了疏散警告。周四上午 8 点开始 Silverado Canyon、Modjesa Canyon 和 Williams Canyon 地区的居民，则是自愿疏散警告。
While driving in #LARain, #LACounty drivers are advised to watch out for crews that are clearing road debris. Report road debris, fallen trees and other road hazards to #LACounty’s 24-hour Dispatch Center at 800-675-4357 (HELP) or visit https://t.co/kYrbgNwnwe pic.twitter.com/Artw3ELPV0
— LA Co Public Works (@LACoPublicWorks) December 22, 2021
