Santa Cruz Island CA to 120W between 150 and 250 NM Offshore Forecast
|Today...N To Nw Winds 20 To 25 Kt. Seas 11 To 14 Ft.|
|Tonight...N To Nw Winds 20 To 25 Kt. Seas 9 To 13 Ft.|
|Thu...N To Nw Winds 20 To 25 Kt. Seas 10 To 12 Ft.|
|Thu Night...N To Nw Winds 15 To 25 Kt. Seas 9 To 13 Ft.|
|Fri...N To Nw Winds 15 To 25 Kt. Seas 8 To 12 Ft.|
|Fri Night...Nw Winds 10 To 20 Kt, Becoming 10 To 15 Kt. Seas 6 To 10 Ft.|
|Sat...N To Nw Winds 10 To 20 Kt. Seas 6 To 8 Ft.|
|Sat Night...N To Nw Winds 10 To 20 Kt. Seas 6 To 11 Ft.|
|Sun...Nw Winds 15 To 25 Kt. Seas 7 To 12 Ft.|
|Sun Night...N To Nw Winds 10 To 20 Kt, Becoming Nw 10 To 15 Kt. Seas 7 To 11 Ft.|
| Area Forecast Discussion|
National Weather Service San Diego CA
248am PDT Wednesday September 27 2023
Today will be a little warmer. A cooling trend will begin on Thursday with the weekend much cooler. There will be periods of gusty southwest to west winds for the mountains and deserts for Friday through Sunday with the winds peaking on Saturday afternoon. The marine layer will deepen onto the coastal slopes of the mountains for the weekend with drizzle or light showers possible during the nigheights and mornings for the coast to the coastal slopes of the mountains. In the afternoons and evenings, slight chances of showers will remain, mostly near the mountains. Then slowly warmer for early next week.
For Extreme Southwestern California Including Orange... San Diego...Western Riverside and Southwestern San Bernardino Counties
Short Term - Today Through Friday
The marine layer is shallower than 24 hours ago, around 1200 feet deep. Satellite imagery shows patchy low clouds over the San Diego County coastal waters extending inland to near the mesas with some patchy low clouds over the Orange County coastal waters.
The greatest coverage of low clouds and fog over land areas at 2:30am is over central and southern coastal areas of San Diego County with both Miramar and Montgomery Field reporting dense fog. There are also some mid clouds from a weak low pressure system well to the southwest of the area that are spreading into portions of southern California early this morning.
Gradual deepening of the marine layer is expected the next two nigheights with night and morning coastal low clouds reaching portions of the western valleys for tonight into Thursday morning and portions of the inland valleys for Thursday night into Friday morning.
High temperatures for most areas will be a few degrees warmer than Tuesday, a few degrees above average for the lower deserts and around average for the coast and valleys. Cooling will begin to spread inland on Thursday with greater cooling on Friday as a strengthening low pressure system moves to near the coast of northern and central California.
Onshore flow will strengthen across southern California with areas of stronger and gusty southwest to west winds developing in the mountains and deserts on Friday afternoon and continuing into the weekend.
Long Term - Saturday through Tuesday
The weekend will be much cooler. Sunday is expected to be the coolest day with high temperatures as much as 20 to 25 degrees below average for the mountains and inland valleys. Sunday high temperatures for the coast, valleys, and high desert will be mostly in the 60s and mostly in the 70s for the lower deserts. High temperatures in the mountains will be mostly in the 40s and 50s, but only in the 30s for the highest elevations in the mountains.
The marine layer will deepen onto the coastal slopes of the mountains for the weekend with little or no daytime clearing for the coast and valleys on Saturday. There could be drizzle or light showers during the nigheights and mornings from the coast inland and onto the coastal mountain slopes with a slight chance for afternoon and evening showers, mainly near the mountains. The snow level could fall as low as 6000 feet for late Saturday night into Sunday morning.
Periods of stronger and gusty southwest to west winds will continue for the mountains and deserts for Saturday into Sunday. ECMWF (European Centre for Medium-Range Weather Forecasts) ensemble output has changed little over the past 24 hours with the timing and overall strength of the winds. However, the spread in the strength of the winds has narrowed. Low pressure over the western states will begin to weaken early next week with a warming trend into the middle of next week.
No hazardous marine conditions are expected through Sunday. Except a few south wind gusts over 20 knots are possible around the entrance to San Diego Bay Thursday.
Skywarn activation is not requested. However weather spotters are encouraged to report significant weather conditions.
NOAA San Diego CA Office: Watches - Warnings - Advisories