Over the upcoming days, California is bracing for the impact of a dual storm system that promises a disruptive blend of rain, snow, and wind. The initial storm is expected to hit on Wednesday, with the subsequent one likely arriving by Sunday. Both storms are driven by atmospheric rivers, channels of tropical moisture often referred to as the “Pineapple Express” when originating near Hawaii.
The National Weather Service has issued warnings, anticipating that the influx of moisture will result in substantial rainfall, posing threats of flooding, mudslides, and extensive travel disruptions throughout the state. Meteorologist Alex Sosnowski from AccuWeather underscores the potential for heavy rain, cautioning that some mountainous regions might experience up to four feet of snow.
The term “rivers in the sky” is used to describe atmospheric rivers, which can unleash a concentrated deluge of rain upon a region. As the storms progress, significant travel disturbances are expected across California from Wednesday through Thursday, affecting cities like San Francisco, Sacramento, Los Angeles, and San Diego. The forecast includes strong winds and rough surf, adding to the challenges posed by the inclement weather.
Flood watches have been issued for central and northern California, where the heavy rain could lead to flash flooding in urban areas, roads, small streams, and areas with previous burn scars. The weather service emphasizes the likelihood of excessive runoff, potentially causing rivers, creeks, and streams to overflow. Poor drainage areas and urban zones are particularly vulnerable, with storm drains and ditches at risk of becoming clogged with debris.
While lower elevations are expected to receive rain, mountainous areas are gearing up for significant snowfall. The Sierra Nevada, above 6,000 feet, is anticipated to bear the brunt of the winter storm, with snow amounts reaching up to four feet. The weather service in Hanford, California, warns of major to extreme winter storm impacts, making travel extremely difficult or nearly impossible.
AccuWeather’s Heather Zehr advises caution and anticipates disruptions in travel across the state. Once the snowstorm subsides, enthusiasts may find solace as skiers and snowboarders, as the freshly fallen snow creates favorable conditions at resorts.
Atmospheric rivers, visible through cloud formations, are expansive bands of water vapor extending thousands of miles from tropical regions to the western U.S. Ranging from 250 to 375 miles wide, these rivers play a crucial role in fueling massive rain and snowstorms that can result in flooding along the West Coast.
Looking ahead, another storm is on the horizon, forecasted to impact California from Sunday to Monday. While the details remain somewhat uncertain, Weather.com suggests that this system also has the potential to bring about flooding, landslides, rockslides, mountain snow, and strong winds. The Southwest, including Las Vegas, is expected to feel the impact of this storm, coinciding with Super Bowl week festivities. Fortunately, the game itself at Allegiant Stadium, being a dome, would be unaffected by rain.
In summary, California is on alert for a series of storms driven by atmospheric rivers, with the potential for heavy rain, snow accumulation, and disruptive weather conditions. Residents and travelers are urged to exercise caution, especially in flood-prone areas and mountainous regions where travel difficulties are anticipated.