San Clemente Island CA to Guadalupe Island from 60 NM offshore west to 120W Offshore Forecast
|Tonight...N To Nw Winds 5 To 10 Kt, Becoming Nw 5 To 15 Kt. Seas 6 To 9 Ft.|
|Sat...N To Nw Winds 5 To 15 Kt, Diminishing To Less Than 10 Kt. Seas 6 To 9 Ft. Areas Of Fog With Vsby 1 Nm Or Less.|
|Sat Night...N To Nw Winds 5 To 10 Kt, Becoming N 5 To 15 Kt. Seas 5 To 8 Ft. Areas Of Fog With Vsby 1 Nm Or Less.|
|Sun...N To Nw Winds 5 To 15 Kt. Seas 4 To 7 Ft. Areas Of Fog With Vsby 1 Nm Or Less.|
|Sun Night...N To Nw Winds 10 To 20 Kt. Seas 4 To 7 Ft.|
|Mon...Nw Winds 5 To 15 Kt, Becoming W To Nw. Seas 4 To 8 Ft.|
|Mon Night...Variable Winds 5 To 15 Kt, Becoming E To Se. Seas 4 To 8 Ft.|
|Tue...E Winds 5 To 15 Kt. Seas 6 To 11 Ft.|
|Tue Night...E To Se Winds 5 To 15 Kt. Seas 7 To 11 Ft.|
|Wed...E Winds 5 To 15 Kt, Becoming Variable. Seas 7 To 10 Ft.|
|Wed Night...N To Ne Winds Less Than 10 Kt, Becoming Variable. Seas 6 To 9 Ft.|
| 132 PM PST Fri Dec 4 2020 |
Synopsis for the far southern California coast - PZZ700
At 1 PM, a 1033 mb high was over western Nevada and a 1020 mb low was over Orange County. Mostly light winds will prevail over the coastal waters through early next week, with east to northeast winds during the nights and early mornings and northwest winds during the afternoons. Combined seas approaching 10 feet in the outer waters will be possible around the middle of next week as a new northwest swell moves in.
| Area Forecast Discussion|
National Weather Service San Diego CA
143pm PST Fri Dec 4 2020
Winds will continue to decrease today and will be generally light through the weekend. The weekend will feature fair weather with warm days and cool nights. A new weather system moving through California will bring more offshore flow and warmer weather Monday through Wednesday, along with elevated fire weather conditions mainly Monday and Tuesday. Onshore flow and cooler weather could return toward the end of the week.
FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES... Winds continue to decrease today as only a few gusts in isolated foothill spots exceed 20 mph early this afternoon. Some pockets of brisk winds can be expected tonight and Saturday morning in similar foothill locations, but only gusting up to 25 mph or so. This weekend we'll largely take a break from the winds and enjoy fair weather, warm days and cool nights. A wave develops along the jet stream over northern California Sunday and spins up into a closed low that cuts off over California while diving southward across the state and over the ocean to our southwest on Monday. Notoriously sketchy for forecasting, cutoff lows like this one is revealing a big spread in ensemble members regarding the timing and position. That's important because we expect this system to produce more offshore winds Monday and Tuesday, and the solutions are different regarding time and strength. Some guidance shows early Monday morning, while others show early Monday afternoon for winds to increase. Latest model guidance is showing signs of coming together. The system is rather moisture-starved, so no precipitation is expected, but there's enough moisture to get some clouds in the sky. Fire weather conditions will become problematic again (see that below). Right now highest wind gusts appear Tuesday in the foothills, 40-50 mph. Gusts of 20-35 mph are expected for the adjacent valleys. The offshore flow and lack of cold air associated with this system will boost temperatures Monday and especially Tuesday and particularly near the coast. The offshore flow eases Tuesday night and Wednesday for decreasing winds and continued mild temperatures. The upper low spins over the ocean off the coast of northern Baja California. It grabs oceanic moisture and should actually bring rain to Baja and Arizona. In its wake there is model spread and solutions depicting a broad trough or a broad ridge over California. More confidently, it does appear the flow finally turns onshore Thursday and Friday. That will begin to cool and humidify the region a little, especially areas west of the mountains. If the trough scenario plays out, that would mean stronger onshore winds heading into next weekend.
No hazardous marine weather is expected through Tuesday. A long- period WNW swell could potentially bring combined seas near 10 feet in the outer waters around next Wednesday.
.BEACHES... A long-period WNW swell from 290 degrees will bring elevated surf today and tonight before decreasing Saturday afternoon. Highest surf will be in southern San Diego County where sets to 7 feet are possible on exposed northwest-facing beaches. A Beach Hazards Statement for the above-average surf is in effect through tonight. A larger long-period WNW swell could bring high surf late Tuesday and/or Wednesday of next week, with surf of 7-10 feet possible. The rip current risk will mostly be high through next Wednesday.
Winds have decreased today. While relative humidity will be extremely low this afternoon, there will be not be strong winds to accompany it. Winds tonight and Saturday are not expected to pose a warning hazard. Breezes will be more isolated and weaker, mainly below mountain passes such as Cajon, San Gorgonio and Campo areas and less than 25 mph. So we stuck a fork in the current warning with its cancellation.
A new weather system will bring more offshore winds to the region Monday and Tuesday, which will elevate the fire weather hazard again across all areas except the coast and the deserts. The system brings some moisture and dew points not so low, so humidity doesn't look to get as low as it got today. Still, humidity will drop as winds develop Monday morning. Stronger winds and lower humidity will follow Tuesday. Foothills again will get the most wind, but it will also extend into most of the valleys and inland coastal areas. A Fire Weather Watch has been issued for the fire weather hazard Monday and Tuesday.
.SKYWARN... Skywarn activation is not requested. However weather spotters are encouraged to report significant weather conditions.
.SGX WATCHES/WARNINGS/ADVISORIES... CA...Fire Weather Watch from late Sunday night through Tuesday evening for Orange County Inland Areas-Riverside County Mountains-Including The San Jacinto Ranger District Of The San Bernardino National Forest-San Bernardino County Mountains-Including The Mountain Top And Front Country Ranger Districts Of The San Bernardino National Forest-San Bernardino and Riverside County Valleys -The Inland Empire- San Diego County Inland Valleys-San Diego County Mountains- Including The Palomar And Descanso Ranger Districts of the Cleveland National Forest-San Gorgonio Pass Near Banning- Santa Ana Mountains-Including The Trabuco Ranger District of the Cleveland National Forest.
Beach Hazards Statement through late tonight for Orange County Coastal Areas-San Diego County Coastal Areas.