The first of a series of atmospheric rivers, known as a 'pineapple express', arrived in California on Wednesday, bringing heavy rain, strong winds, and flash flood risks. Forecasters warn that the storms, which pull moisture from near Hawaii, could cause significant damage, particularly in areas affected by past wildfires and saturated ground.
Climate scientist Daniel Swain noted that the system could bring six to 12 hours of heavy rainfall in Northern California, leading to widespread roadway and small-stream flooding. Officials have urged residents to prepare for power outages, downed trees, and hazardous roads. Governor Gavin Newsom activated state operations centres and pre-positioned resources in high-risk communities.
The storm moved from California's far north down the coast, with rain reaching the San Francisco Bay area by Wednesday afternoon. Heavier downpours and mountain snow were expected late Wednesday into Thursday, with an even more powerful storm forecast for Sunday. The cumulative impact of back-to-back storms poses the greatest threat, especially in areas already saturated by previous rains.
Last winter, California experienced a series of atmospheric rivers that caused deadly flooding and record snowfall, killing over 20 people. The memory remains fresh for residents like Joshua Whitby, kitchen manager at Zelda's on the Beach in Capitola, who said there is 'a little bit of PTSD' from the damage suffered last year.
Despite the risks, the storms are expected to boost the state's snowpack, which is currently at 52% of average. Sean de Guzman of the Department of Water Resources noted that while January storms helped, the snowpack remains below normal for this time of year. The second storm system, arriving Sunday-Monday, could bring heavy precipitation and damaging winds to southern California.
