Here is this week’s weather forecast from PG&E meteorologist John Lindsey.
Robust upper-level winds will strengthen a cold front as it moves southward along the California coast.
This cold front is forecast to move over the Central Coast between 7 and 11 a.m. Monday with rain. An upper-level trough will follow Monday afternoon with additional rain showers. Rainfall amounts are expected to range from a tenth of an inch to half an inch. Lower-temperature air behind this front will lower the snow levels across the Sierra Nevada down to 4,500 feet by Monday night, with a foot or more of accumulation above 6,000 feet across the high Sierra by Tuesday.
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Along the Central Coast, moderate gale-force to fresh gale-force (32- to 46-mph) northwesterly winds are expected along the coastline Monday afternoon as a strong 1,039-millibar Eastern Pacific High moves in behind it.
A chilly air mass behind this cold front will result in lower air temperatures. In fact, Monday’s high temperatures could be more than 15 degrees cooler than Sunday’s in locations away from the beaches. Strong to gale-force northwesterly winds, cooler temperatures, night and morning marine low clouds and fog, and partly cloudy skies are forecast for Tuesday.
High pressure will build over the Great Basin on Wednesday. This condition will produce moderate to fresh (13- to 24-mph) and at times gusty Santa Lucia (northeasterly) winds during the night and morning hours starting Wednesday and continuing through Saturday. These winds will produce clear and dry weather with cool nights and mild afternoons. These winds could be especially strong Friday morning.
Monday’s surf report
Moderate gale-force to fresh gale-force (32- to 46-mph) northwesterly winds Monday will generate a 9- to 11-foot northwesterly (310-degree, deep-water) sea and swell (with a 5- to 13-second period) Monday into Tuesday. Rough indeed! The northwesterly sea and swell will decrease to 7- to 9-feet (with a 7- to 11-second period) Wednesday, further lowering to 4 to 6 feet by Thursday (with an 8- to 10-second period).
A 3- to 5-foot northwesterly (300-degree, deep-water) swell with (with an 8- to 14-second period) will arrive along the coastline on Friday and remain at that height through Saturday. A 7- to 9-foot northwesterly (295-degree, deep-water) swell (with a 19- to 21-second period) is forecast along the coastline Sunday.
Seawater temperatures will lower to between 55 and 59 degrees Monday afternoon into Tuesday, gradually rising Wednesday into Friday.
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John Lindsey’s Weekly Forecast is special to The Tribune. His Weather Watch column appears in the Local section on Sundays. Contact him at email@example.com.
This week’s temperatures
LOWS AND HIGHS, SLO AND COASTAL VALLEYS
LOWS AND HIGHS, PASO ROBLES