Remnants of Hurricane Jova will bring muggy weather to SLO County

The remnants of Hurricane Jova will produce partly cloudy and muggy conditions on Sunday. Gentle to moderate (8 to 18 mph) Santa Lucia (northeasterly) winds on Sunday morning will keep the marine layer out to sea.

A more typical Central Coast weather pattern will return on Monday as fresh to strong (19 to 31 mph) afternoon northwesterly winds, night and morning low marine clouds, and cooler temperatures develop. This pattern is expected to continue through the work week.

Sunday’s temperatures will warm to the high 90s, maybe even triple-digit levels, if there’s not too much cloud cover in the inland valleys (Paso Robles). The coastal valleys (San Luis Obispo) will reach the mid-80s, while the beaches will range from the high 70s to the low 80s. Subtropical moisture from former Hurricane Jova will make it feel warmer.

The afternoon northwesterly winds will increase to fresh to strong (19 to 31 mph) levels on Monday through Saturday, resulting in the return of the marine layer during the overnight but clearing during the late morning and afternoon. High temperatures on Tuesday through Saturday will range from the mid-80s in the inland valleys to the mid-70s in the coastal valleys and the 60s along the beaches.

There is still no indication of any significant Santa Lucia (northeasterly/offshore) wind events developing through the first half of September.

Surf report

Hurricane Jova, about 500 miles to the west of Baja California on Friday, will produce a 3- to 4-foot southerly (190-degree, deep-water) swell (with an 11- to 13-second period) along the Central Coast Sunday into Monday, decreasing to 1- to 2-feet on Tuesday.

Hurricane swells this size are rare along the Central Coast and have historically produced strong rip currents; please practice caution when heading to the beaches.

Combined with this southerly swell will be a 4- to 6-foot northwesterly (310-degree, deep-water) sea and swell (with a 5- to 11-second period) on Sunday, increasing to 6 to 8 feet (with a 5- to 8-second period) Monday into Tuesday.

A 5- to 7-foot northwesterly (305-degree, deep-water) sea and swell (with a 5- to 11-second period) is expected along our coastline on Wednesday, decreasing to 4 to 6 feet on Thursday into Saturday. Along with the northwesterly swell, there will be a 1- to 2-foot Southern Hemisphere (205-degree, deep-water) swell (with a 15- to 17-second period) Wednesday into Saturday.

Seawater temperatures will range between 57 and 60 degrees through Monday, decreasing to 56 to 58 degrees on Tuesday through Friday.

This week’s temperatures

LOWS AND HIGHS, PASO ROBLES

LOWS AND HIGHS, SAN LUIS OBISPO AND COASTAL VALLEYS

John Lindsey is a retired PG&E marine meteorologist. Email him at JohnLindseyLosOsos@gmail.com or follow him on Twitter @PGE_John.

This story was originally published September 10, 2023 at 5:00 AM.