Across Northern & Central CA:
A very concentrated setup with a high risk for flooding is expected to impact the region. This is due to what meteorologists call a Pineapple Express setup, which is expected to slam into California, especially the northern part, starting tonight and continuing through at least Friday. More updates will be provided as we approach the next setup. This will create conditions for very heavy rainfall, locally strong gusty winds, and heavy snowfall in the mountains.
Overall Forecast:
In the mid/upper levels of the atmosphere, back-to-back troughs, which are expected to strengthen, are forecasted to impact Northern California. Multiple shortwave troughs, associated with and wrapped around the main troughs, will also affect the region. Simultaneously, the low-level jet stream, also wrapped around this system, will dip southward. At the surface, a cold front is expected to sweep through, bringing moisture ahead of it. Very deep moisture will be pushed into the region, resulting in multiple waves of very heavy rain and mountain snow across the region. Due to the cold front’s prime nature, convective activity, including potential thunderstorms, will be embedded, especially ahead of the front where the most significant lift is anticipated.