Here is this week’s weather forecast by PG&E meteorologist John Lindsey.
A cold and unstable airmass will move in behind Sunday’s cold front and will produce rain showers and a chance for thunderstorms Monday. Thunderstorms can produce strong down bursts, periods of heavy rain, hail and lightning. Heavy snow will continue in the Sierra Nevada on Monday with at least a couple feet of snowfall above 4,000 feet or more in the higher peaks. Snow levels could lower to 3,000 feet along the Central Coast by Monday morning. An upper-level trough will follow on Tuesday morning with more rain showers. High temperatures will only reach the mid 50s throughout the Central Coast on Monday and Tuesday.
High pressure is then expected to build back into the region Wednesday and should produce night and morning Santa Lucia (offshore) winds and dry weather through the end of January. Temperatures will gradually rise over this period. Dense ground fog may develop in the inland valleys during the overnight hours.
It looks like the Central Coast will get back into a wet weather pattern by the first week of February.
On Saturday, the Diablo Canyon waverider buoy reached 20.1 feet with a 20-second period, while the Santa Maria NOAA marine buoy (21 nautical miles northwest of Point Arguello) hit 31 feet. These readings were some of the highest along the Central Coast in years.
A 12- to 14-foot westerly (270-degree, deep-water) swell (with a 12- to 15-second period) is expected on Monday and will remain at this height and period into Tuesday morning, decreasing to 10 to 12 feet (with a 13- to 15-second period) by Tuesday afternoon and night.
A 5- to 7-foot northwesterly (295-degree, deep-water) swell (with a 20- to 24-second period) will arrive along our coastline Wednesday afternoon and night, increasing to 10 to 12 feet (with an 18- to 20-second period) on Thursday. This swell will decrease to 9 to 11 feet (with a 15- to 17-second period) by Friday.
Seawater temperatures will range between 54 and 56 degrees through Friday.
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This week’s PG&E safety tips: At PG&E, the safety of our customers and employees is our top priority. Monday and Tuesday’s rain showers will create slippery conditions. Please slow down on the road and give yourself extra time to reach your destination. Driving too fast is the No. 1 cause of accidents on wet days.
John Lindsey’s Weekly Forecast is special to The Tribune. He is PG&E’s Diablo Canyon Power Plant marine meteorologist and media relations representative. Contact him at email@example.com. Follow him on Twitter @PGE_John.
This week’s temperatures
LOWS AND HIGHS, PASO ROBLES
LOWS AND HIGHS, SLO AND COASTAL VALLEYS