January 21, 2019 – Showers taper off across the region early today with a few expected to linger into this evening across the higher elevations of the northern Sierra Nevada. Dry weather will locally breezy northerly winds expected through the week.
Discussion
Upper trough shifting east into the Great Basin. Radar shows numerous showers continuing across the northern Sierra west slopes with a few lingering showers elsewhere. Current temperatures are colder compared to 24 hours ago and range from the 20s in the mountains to the mid and upper 40s across the Central Valley.
Trough continues to shift east the next several days allowing ridging from the eastern Pacific to shift over NorCal beginning tonight. Showers will taper off across the northern Sierra today with perhaps a few lingering along the crest into early this evening. Elsewhere, clearing skies and northerly winds expected to develop by this afternoon.
Upper high will build in Tuesday with dry and milder weather. Northerly flow will continue with some patches of late night and morning valley fog, mainly along the eastern edge of the valley.
Extended Discussion (Friday through Monday)
Quiet weather is expected for the extended part of the forecast due ti an amplified ridge across the eastern Pacific setting up shop. Mostly clear skies may lead to early morning fog most mornings, which will then be followed by warmer than normal high temperatures each day. Forecast highs for the valley each day will be in the 60s, with the upper 40s and low 50s being seen at higher elevations. Low temperatures will generally be around climatological values.