Point Sal to Santa Cruz Island CA including San Miguel and Santa Rosa Islands Marine Forecast
| Today...W Wind 10 To 20 Kt. Gusts To 25 Kt. Seas 5 To 7 Ft, Building To 6 To 9 Ft. Wave Detail: Nw 9 Ft At 13 Seconds. A Slight Chance Of Showers This Morning, Then A Chance Of Showers This Afternoon. |
| Tonight...Sw Wind 10 To 20 Kt. Gusts To 25 Kt. Seas 7 To 10 Ft. Wave Detail: Nw 9 Ft At 13 Seconds. A Chance Of Showers. |
| Sun...Sw Wind 15 To 20 Kt. Seas 6 To 9 Ft. Wave Detail: Nw 9 Ft At 12 Seconds. A Slight Chance Of Tstms. A Chance Of Showers In The Morning, Then Showers Likely In The Afternoon. |
| Sun Night...Sw Wind 10 To 20 Kt, Becoming Ne 10 To 15 Kt After Midnight. Seas 6 To 8 Ft. Wave Detail: Nw 8 Ft At 11 Seconds. Showers Likely With A Slight Chance Of Tstms. |
| Mon...N Wind 10 To 15 Kt, Becoming Nw 10 To 20 Kt In The Afternoon. Seas 4 To 6 Ft. Wave Detail: Nw 6 Ft At 10 Seconds. A Chance Of Showers With A Slight Chance Of Tstms In The Morning, Then A Slight Chance Of Showers In The Afternoon. |
| Mon Night...Nw Wind 10 To 20 Kt. Seas 4 To 5 Ft. Wave Detail: Nw 5 Ft At 10 Seconds. A Slight Chance Of Showers In The Evening. |
| Tue...Nw Wind 10 To 20 Kt. Seas 3 To 4 Ft. Wave Detail: Nw 4 Ft At 9 Seconds. |
| Tue Night...Nw Wind 15 To 20 Kt. Seas 4 To 5 Ft. Wave Detail: Nw 4 Ft At 7 Seconds. |
| Wed...Nw Wind 15 To 20 Kt. Seas 4 To 5 Ft. Wave Detail: Nw 5 Ft At 6 Seconds. |
| Wed Night...Nw Wind 15 To 20 Kt, Becoming 10 To 15 Kt After Midnight. Seas 4 To 5 Ft. Wave Detail: Nw 5 Ft At 5 Seconds. Winds And Seas Higher In And Near Tstms. |
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Area Forecast Discussion ...UPDATED National Weather Service Los Angeles/Oxnard CA 154pm PST Sat Jan 25 2025 Synopsis 25/1006 AM. Significantly cooler weather will develop this weekend as a cold storm system moves into the region. Rain and mountain snow showers are expected between this afternoon and Monday, likely heaviest late Sunday into Monday. Brief heavy downpours with small hail are possible with any thunderstorms, mainly Sunday and Monday. Dry but cool weather is expected through mid week with a weaker storm possible at the end of the week. Short Term - Today through Monday ...25/950 AM. ***UPDATE*** As the upper level low approaches the region (now located just north of the Bay Area), gusty southerly winds have picked up over the higher terrain and Antelope Valley foothills of Los Angeles County. Shower chances will increase through the day today, starting with the northern counties. Rain chances will reach Los Angeles and Ventura Counties by mid-day. The focus for today will be precipitation totals and thunderstorms/convection chances. ***From Previous Discussion*** A 545 dam closed low has formed at the base of a long wave pos tilt trough and is currently over Redding. The low will move to the Bay Area by noon and will set up moist WSW flow over Srn CA. This will lead to an increasing chance of showers first over the Central Coast later this morning and will then spread into areas south of Pt Conception during the afternoon. The upper low will move very slowly to the south and will keep the area under increasingly moist flow through Sunday afternoon. A weak surface low will develop off of the SLO county coast and this will bring a fairly long duration period of southerly flow to the area. This will bring enhanced rainfall to the south facing slopes south of Pt Conception. Rainfall rates during this period will generally range from a tenth to a quarter inch per hour. The character of the system will change later Sunday when the cold core accelerates to the south and then pivots to the east and across the SBA Channel and then through LA county Monday afternoon. The -28 degree C cold pool(a region of relatively cold air) at 500 mb will destabilize the atmosphere and allow for stronger convective showers or even weak TSTMs. This phase of the system will be capable of producing rain fall rates in excess of half an inch per hour. This would be enough to crease debris flows should one of these convective cell score a direct hit on a recent burn area. This threat is highlighted by a Flash Flood Watch for the burn areas (Bridge, Palisades, Franklin, Hughes, and Eaton) from 4 pm Sunday to 4 pm Monday. The low will move south of the area Monday afternoon which will greatly decrease the shower activity to the south of the mtns but wrap around moisture and dynamics will bring an increase threat to the north facing slopes of LA county. Snow levels will fall to near 4000 ft and would limit the debris flow threat for burn areas over this elevation. Rainfall totals will range from a half inch to three quarters of an inch north of Point Conception (the flow into this region has spent less time over the ocean and will not have the moisture to produce higher totals). South of Pt Conception The flatter areas will see about an inch of rain and the south facing slopes could see anywhere from an inch and half to two and half inches. The interior as usual will see much less rain likely only a third to a half inch. All of this moisture and 4000 ft (and locally lower Sunday eve into Monday morning) snow levels will bring a decent amount of snow to the mtns. A Winter Storm Warning for the combination of advisory level winds and 6 to 12 locally 15 inches of snow (above 6000 ft). Lower elevations will see less snow and the Grapevine on Interstate 5 could see an inch or two. A winter weather advisory will likely be needed for the foothills of the Antelope Vly (and a 25 percent chance for the vly floor) later Monday due to the wrap around from the departing low. It will be windy today with advisory level gusts across portions of the Antelope Vly and foothills this afternoon and evening. The Central Coast will likely see advisory level gusts Sunday. This will be a cold system and it is reflected in the max temps. Look for a 10 to 15 degree drop in temps today followed by another 3 to 6 degree on Sunday for most areas. The Antelope Vly will actually warm some today due to down sloping winds. By Sunday most max temps will only be in mid or upper 50s. Long Term - Tuesday through Friday 25/324 AM. The area will still be under the upper low's flow pattern on Tuesday. The winds aloft will be from the NE and there will be weak offshore flow at the sfc, This might produce some canyon winds but nothing near advisory levels. Enough ensemble members show once last gasp vort lobe moving over LA county in the afternoon and will bring a slight chance (20 percent) of showers to the area with trivial rainfall amounts. Otherwise skies will be partly cloudy and max temps will bump up 2 to 4 degrees. Weak ridging is on tap for Wednesday and Thu and both days should have fair weather with 3 to 5 degrees of warming Wednesday and 2 to 4 degrees on Thu. Temps Thu will approach normal across the csts and vlys and will be even a little above normal across the interior. Cooler Friday and Saturday as a weak system will approach and move over the area. Currently this looks to be nothing more than a tenth to a quarter inch of a rain maker. Marine 25/153 PM. A cold and slow-moving storm system will affect the coastal waters through Monday with periods of rain and gusty winds. Isolated thunderstorms could develop between late tonight and Monday morning and may contain local gale force winds with rough seas, dangerous lightning, heavy rainfall with reduced visibility, and potentially waterspouts. For the Outer Waters, expect borderline Small Craft Advisory (SCA) level seas/winds for PZZ670/673 (esp. western portions) thru Sunday morning. There is a 20-30% chance of SCA (Small Craft Advisory) level winds for the waters south of Point Conception, around the Channel Islands, and down to San Nicolas Tuesday afternoon/eve thru Wednesday morning. Otherwise, expect winds/seas to stay sub-SCA (Small Craft Advisory) thru at least Wed. For the Inner Waters, there is a 20-30% chance of SCA (Small Craft Advisory) level wind gusts for western portions of PZZ650 Tuesday afternoon/eve. SW to S winds could gusts to SCA (Small Craft Advisory) levels thru Sunday afternoon for PZZ645 with nuisance to minor issues for south facing harbors such as Port San Luis. Otherwise, conditions should remain under SCA (Small Craft Advisory) levels thru at least Thu. NOAA Los Angeles/Oxnard CA Office: Watches - Warnings - Advisories CA...Flood Watch remains in effect from Sunday afternoon through Monday afternoon for zones 88-362-369-370-379-380-548. (See LAXFFALOX). Winter Weather Advisory remains in effect until 4pm PST Monday for zones 353-376>379. (See LAXWSWLOX). Wind Advisory in effect until 4pm PST this afternoon for zones 379-380. Winter Storm Warning remains in effect until 4pm PST Monday for zone 380. (See LAXWSWLOX). Wind Advisory now in effect until 3am PST Sunday for zones 381-382. Wind Advisory remains in effect until 3am PST Sunday for zone 383. PZ...Small Craft Advisory in effect until 3am PST Sunday for zones 670-673. |
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