Rain, mountain snow and gusty winds today. Isolated possible thunderstorms this afternoon. A brief spell of dry weather returns Sunday through Monday morning before more rain and snow are seen Monday through Tuesday. Unstable the weather continues from the middle to the end of the week.
A weather system makes its way ashore in northern California early this morning with rain showers noted in the northern part of the CWA around 1 a.m. Precipitation is expected to increase across the valley this morning with a heavier band of rain expected to cross the valley between 4 and 8 a.m., before precipitation becomes more limited to higher ground in the mountains and foothills late this morning.
Snow levels have increased slightly for this event with the Northern Mountains and Coast Range generally 4.5-5.5 kft this morning and the Southern Sierra and Cascades generally remaining at crossing levels during the event .
Difficult and dangerous movements in the mountains are sometimes anticipated and the Winter Weather Advisory stay as it is.
This afternoon, some isolated thunderstorms will be possible, primarily in the valley and foothills east of I-5. HREF reports the best odds north of I-80 right now, though some isolated storms also cannot be ruled out in the Motherlode area. The main storm-related threats will be flashgusty wind and small hail. This threat diminishes tonight.
Additionally, blustery south to west winds are expected this morning well into the afternoon, with the strongest gusts on mountain ridges.
This fast moving system leaves the area tonight with a brief ridge returning over NorCal on Sunday.
The highest valley QPF is expected in the northern Sacramento Valley, decreasing further south. Higher amounts are expected in the foothills and mountains, ranging from around 0.50 to 1.50″. Snow levels generally appear to be at pass level again, with several more inches of snow expected on the mountains. This system appears to be another fast hitter with dry weather forecast for Tuesday night through Wednesday morning.
In-Depth Discussion (Wednesday to Saturday)
cool and unstable the pattern continues through the end of next week. Sets generally agree that the middle of the week Crete will move east like another abnormally cold hollow moves in Thursday. The precipitation goes likely begin to spread inland across NorCal later Wednesday with potentially another major winter system for the mountains, but the clusters indicate there may be timing issues with the hollow.
The ridge forecast for next weekend should bring a return of dry weather with near average temperatures for the end of April.