The National Weather Service in Sacramento is forecasting a series of three storms expected to impact the region starting today, with an atmospheric river bringing widespread rain and mountain snow into next week. In a statement released early this morning, National Weather Service warns of a "colder storm" likely to bring heavy snow and significant travel disruptions to mountain areas next week. For Sacramento Valley and surrounding regions, moderate to heavy rain rates are anticipated, which could lead to rises in area streams and rivers, along with potential flooding on low-lying roads. According to the National Weather Service Sacramento, "No debris flow impacts are expected over burn scars," but there is a chance for mud and rock slides in the foothills.
A Flood Watch is in effect from this afternoon through Sunday evening for areas below 3000 feet. Heaviest rainfall is expected to occur from Friday afternoon through Saturday afternoon. The first of these systems is a warmer one, with snow impacts expected primarily above 6500 feet. The National Weather Service Sacramento site elucidates that storm totals of more than 3 feet of snow are possible over the highest peaks, and travelers should anticipate delays and chain controls in high mountain areas.
As the second storm approaches on Monday through Tuesday night, snow levels initially remain high but are forecasted to drop significantly, affecting travel corridors like I-5. National Weather Service Sacramento projects, "Snow totals for the Sierra are currently are projected to be around 3 to 4 feet above 6500 feet, which would bring major travel problems." Prospects of thunderstorms on Monday afternoon also exist, mainly for the eastern portion of the Sacramento Valley and the northeast foothills, although "Instability looks limited at this time, so just expecting a few isolated storms." Drivers are urged to stay informed on road conditions at quickmap.ca.dot.gov and weather conditions at weather.gov before traveling.
The extended forecast hints at continued active weather with additional moderate rains and heavy mountain snow throughout much of the following week. The impending third storm is set to introduce cold air with low snow levels, possibly affecting regions such as Redding, with a "20% probability of 1 inch of snow," as per the National Weather Service. Travel impacts are anticipated to be significant in mountain areas throughout this period. Periods of gusty southerly winds are also expected to persist. Sacramento residents and travelers alike should prepare for these conditions and monitor local guidance for updates.
