The Golden State braces for an atmospheric onslaught as a notable atmospheric river targets Northern California, poised to usher in significant rainfall and potential flooding concerns. The National Weather Service in San Francisco has indicated that frigid temperatures will soon give way to impactful rainfall, particularly across the North Bay midweek, spreading southward as the week progresses.
In line with recent weather developments, Northern California area, including mountainous regions, could face up to 20 inches of rain from Tuesday through Saturday. Coastal communities like Eureka and Crescent City are expected to receive over 10 inches, while the North Bay areas such as Santa Rosa may see at least 5 inches – a significant uptick of moisture that the San Francisco Chronicle reports as a dramatic forecast shift with serious implications.
But what exactly constitutes an atmospheric river?
These narrow, elongated regions in the sky play a crucial role in transporting water vapor, a stark counterpart to more familiar terrestrial rivers. According to NOAA, an average atmospheric river carries water vapor amounts nearly equivalent to the discharge of the Mississippi River and, on occasion, can transport volumes soaring up to fifteen times that figure. When these atmospheric behemoths make landfall, the fallout can range from much-needed precipitation to destructive floods, a phenomenon Californians know all too intimately.
Forecast models have been honing in on the system’s trajectory, suggesting that the most substantial impact will likely pummel regions to the north. However, if the system stalls or shifts, rainfall totals could vary dramatically. The San Francisco Chronicle notes “it’s reasonable to expect a corridor of high rainfall totals across coastal Northern California with a quick taper to the south.” Residents are advised to stay updated with the latest weather information as the situation evolves and prepare for the impending deluge…