Santa Cruz Island to San Clemente Island to 60 NM offshore including San Nicolas and Santa Barbara Islands Marine Forecast
| Today...Nw Winds 25 To 35 Kt With Local Gusts To 40 Kt. Strongest Eastern Portion. Combined Seas 7 To 10 Ft Dominant Period 7 Seconds, Building To 8 To 11 Ft In The Afternoon. |
| Tonight...Nw Winds 25 To 30 Kt With Gusts To 40 Kt. Combined Seas 11 To 14 Ft Dominant Period 8 Seconds. |
| Sat...Nw Winds 20 To 30 Kt With Gusts To 40 Kt. Combined Seas 11 To 14 Ft Dominant Period 9 Seconds. |
| Sat Night...Nw Winds 20 To 30 Kt With Gusts To 40 Kt, Becoming 15 To 25 Kt With Gusts To 30 Kt Late. Combined Seas 10 To 13 Ft Dominant Period 9 Seconds. |
| Sun...Nw Winds 20 To 30 Kt. Local Gusts To 35 Kt In The Afternoon. Combined Seas 10 To 13 Ft Dominant Period 9 Seconds. |
| Sun Night...Nw Winds 20 To 30 Kt. Local Gusts To 35 Kt In The Evening. Combined Seas 10 To 13 Ft Dominant Period 9 Seconds. |
| Mon...Nw Winds 20 To 30 Kt. Combined Seas 9 To 12 Ft. |
| Tue...Nw Winds 15 To 25 Kt. Combined Seas 8 To 11 Ft. |
| Area Forecast Discussion ...UPDATED National Weather Service Los Angeles/Oxnard CA 1146am PDT Fri April 26 2024 Synopsis 26/1145 AM. An upper-level trough of low pressure will continue to move over the region through tonight. Any shower activity will likely be across the northern portion of the area and along the northern slopes of the mountains and into the San Gabriel Mountains and the San Gabriel Valley. A tightening pressure difference across the region will bring gusty and potentially damaging winds to the region through tonight. Otherwise, dry weather can be expected along with gradually warmer temperatures this weekend into the middle of next week. Short Term - Today through Sunday 26/1141 AM. An inside slider type trough of low pressure continues to push south into the region this morning. This trough of low pressure, originating from the Gulf of Alaska will usher in a cooler air mass today. Limited moisture with system and the trough's position will likely inhibit some of the shower activity, especially across southern Santa Barbara and Ventura Counties today, and some what into western Los Angeles County. The latest satellite shows clear skies across much of the southern California bight this morning. Clouds are banking across the northern interior portions of the area and along the northern slopes of the mountains, and as the downsloping effect recede from the Transverse Range, clouds start to pickup again across eastern Los Angeles County and into the counties south and east. Probability of Precipitation has been nudged higher inline with EPS ensemble members and high-resolution multi-model ensemble solutions indicating a bit higher chance for the northern areas, into eastern San Gabriel, and across the San Gabriel Valley. There is a non-zero chance of thunderstorms for this afternoon and evening, but the best chance of thunderstorms will be to the east of the area where the steepest lapse rates exists. The main story will likely be the strong winds expected to develop today in the wake of a dying cold frontal boundary and tightening northerly pressure gradients. A broad swath of wind headlines have been issued across the region. The strongest winds are expected through the Interstate 5 Corridor and across the Channel Islands offshore. Strong pressure gradients will tighten through the day today with gusty west to northwest winds developing through this afternoon and evening, then shifting to northerly overnight tonight. In the latest update, a High Wind Warning was added for the Channel Islands for this afternoon and tonight, while wind advisories were expanded across much of Ventura County and into western Los Angeles County for this afternoon and this evening. A wind advisory was also added for the Cuyama Valley. There is a good chance that some advisories will need to extended for the northerly winds tonight through Saturday morning. ***From Previous Discussion*** The strongest winds will occur this evening over the mtns as the inside slider moves into AZ and the best upper level support develops. The strong winds will prevent any coastal clouds. The north winds will continue to bring plenty of upslope clouds to the north slopes as well as a chance of showers. An inch or 2 of snow is possible over 6000 ft. Gradients and upper level support will slowly fade starting late in the evening and winds will diminish after midnight. Saturday will be a nice if somewhat breezy day. A ridge will move into the state and hgts will rise to about 572 dam. These hgt rises along with continued offshore flow form the north and cloud free skies will result in 3 to 6 degrees of warming across the area. Weak ridging and 574 dam hgts will make for a very pleasant weather day on Sunday. The winds will be greatly diminished and most areas will see 1 to 3 degrees of warming. Most cst/vly max temps will end up in the mid 60s to mid 70s. Long Term - Monday through Thursday 26/347 AM. The EC and GFS (Global Forecast System) deterministic and mean ensembles are in generally good agreement during the extended period. Weak cyclonic flow will be over the state on Monday and Tuesday there will be an increase in cyclonic flow on Wednesday and Thu. Onshore flow will slowly increase through the period and will end up being fairly strong towards the end of next week. There may be a slight return of low clouds Monday and Tuesday but more extensive low clouds are likely in the latter half of next week. Despite the cyclonic flow hgts are forecast to rise Monday and Tuesday and this should allow for two more day of warming. Tuesday should be the warmest day of the next 7 with most max temps 2 to 4 degrees above normal (the beaches might be below normal). The increased onshore flow slightly lower hgts and increased marine layer will bring a cooling trend for Wednesday and Thu. Marine 26/905 AM. In the Outer Waters, gale force NW winds are expected to become widespread this morning, then continue thru late Sat night. However, winds will likely decrease to Small Craft Advisory (SCA) levels late tonight in the northern zone (PZZ670). There is a 40-50% chance of gales in the northern zone (PZZ670) again Sat afternoon into Sat night. SCA (Small Craft Advisory) level winds and seas are expected Sunday thru Tue. There is a 30-40% chance of gale force winds Sunday afternoon/eve, and a 20-30% chance of gale force winds Monday afternoon/eve, with the lowest threat in the northern zone. In the Inner Waters N of Pt. Sal, winds will increase to SCA (Small Craft Advisory) levels this morning, then to gale force this afternoon. Winds will drop to SCA (Small Craft Advisory) levels late tonight. SCA (Small Craft Advisory) level winds/seas are expected Sun thru Monday night, with a 40% chance Tue. There is a 25% chance of gales during the afternoon/eve Sunday and Mon. In the Inner Waters S Pt Conception, winds will increase to SCA levels rapidly this morning. Winds will increase to gales across the SBA channel late this morning, and gales will overspread the channel and the southern inner waters this afternoon. Gales will likely continue thru late tonight, then decrease to SCA (Small Craft Advisory) conds. SCA (Small Craft Advisory) level wind and seas are likely to continue through late Sun night, (or Monday night in the western SBA Channel), with the strongest winds during the late afternoon thru late evening hours. There is a 50% chance of gales across the western portions of the SBA Channel late Sat afternoon into late Sat night, with a 30% chance elsewhere during that time. Widespread strong to gale force winds will create dangerous sea conditions across the coastal waters thru the weekend, with short-period, steep, and choppy waves. There may be dangerous breaking waves near west-facing harbors. Mariners should remain in safe harbor until conditions improve. Beaches 26/617 AM. Moderate W swell and large wind waves are expected to produce low end High Surf Advisories on west-facing beaches of L.A//VTU Counties and Catalina Island, and on W and NW facing beaches on the Central Coast from early this afternoon thru Sat morning. Surf is expected to reach 4-7 ft with local sets to 8 ft in L.A./VTU Counties, and 7-10 ft with local sets to 12 ft on the Central Coast. Confidence in high surf is moderate at best. Surf will be choppy and rough. There is a high risk of rip currents on all beaches thru Sun. NOAA Los Angeles/Oxnard CA Office: Watches - Warnings - Advisories CA...Wind Advisory in effect until 9pm PDT this evening for zones 38-358-369-371-372-374. Wind Advisory in effect until 3am PDT Saturday for zone 87. High Surf Advisory in effect until 10am PDT Saturday for zones 87-340-346-354-362-366. (See LAXCFWLOX). Wind Advisory remains in effect until 3am PDT Saturday for zones 88-352-353-375>377-379-380. Wind Advisory remains in effect until 9pm PDT this evening for zones 340>342-346>348-350-354-355-362-366>368. Wind Advisory remains in effect until 3am PDT Sunday for zones 349-351. Wind Advisory in effect from 3pm this afternoon to 3am PDT Saturday for zone 356. High Wind Warning remains in effect until 3am PDT Saturday for zones 378-381-383. Wind Advisory remains in effect until noon PDT today for zone 383. High Wind Warning in effect from 3pm this afternoon to 3 AM PDT Saturday for zones 549-550. PZ...Small Craft Advisory in effect until 3pm PDT this afternoon for zones 645-655-670. Gale Warning in effect from 3pm this afternoon to 3am PDT Saturday for zones 645-655-670. Gale Warning in effect until 3am PDT Saturday for zone 650. Gale Warning in effect until 3am PDT Sunday for zones 673-676. https://www.weather.gov/erh/ghwo?wfo=lox |
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