San Mateo Point CA to the Mexican Border and out 30 NM Marine Forecast
| Tonight...Wind West 10 Knots. Gusts To 15 Knots This Evening. Wind Waves Around 3 Feet This Evening...Becoming 2 Feet Or Less. Swell West 2 To 4 Feet At 6 Seconds. A Slight Chance Of Rain After Midnight. |
| Friday...Wind West 10 To 15 Knots...Becoming 10 To 20 Knots In The Afternoon. Gusts To 25 Knots. Wind Waves Around 3 Feet... Building To 4 To 6 Feet In The Afternoon. Swell West 4 To 6 Feet At 8 Seconds. A Chance Of Rain In The Morning. |
| Friday Night...Wind West 15 To 25 Knots With Gusts To 30 Knots. Combined Seas 8 To 10 Feet Dominant Period 8 Seconds...Building To 9 To 12 Feet Dominant Period 9 Seconds After Midnight. A Slight Chance Of Rain In The Evening. |
| Saturday...Wind West 10 To 15 Knots With Gusts To 20 Knots. Wind Waves Around 2 Feet Or Less. Swell West 5 To 7 Feet At 9 Seconds. |
| Saturday Night...Wind West 10 Knots...Becoming South After Midnight. Wind Waves Around 2 Feet Or Less. Swell West 3 To 5 Feet At 8 Seconds. |
| Sunday...Wind Variable Less Than 10 Knots...Becoming West 10 Knots In The Afternoon. Wind Waves Around 2 Feet Or Less. Swell West 3 To 4 Feet. |
| Sunday Night...Wind West 10 Knots In The Evening...Becoming Variable Less Than 10 Knots. Wind Waves Around 2 Feet Or Less. Swell West 2 To 4 Feet. |
| Monday...Wind Variable Less Than 10 Knots...Becoming Southwest 10 Knots In The Afternoon. Wind Waves Around 2 Feet Or Less. Swell West 3 To 4 Feet At 8 Seconds. |
| Monday Night...Wind Variable Less Than 10 Knots. Wind Waves Around 2 Feet Or Less. Swell West 2 To 3 Feet At 10 Seconds. |
| Tuesday...Wind Variable Less Than 10 Knots...Becoming Southwest 10 Knots In The Afternoon. Wind Waves Around 2 Feet Or Less. Swell West 2 To 3 Feet At 10 Seconds. |
| Tuesday Night...Wind Variable Less Than 10 Knots. Wind Waves Around 2 Feet Or Less. Swell West 2 To 3 Feet At 10 Seconds. |
| Area Forecast Discussion National Weather Service San Diego CA 857pm PDT Thu April 25 2024 Synopsis Gusty westerly winds; periods of drizzle or light rain west of the mountains; and cooler conditions are expected through Friday. A deep marine layer will result in night and morning low clouds throughout much of the coastal basin through Friday. The marine layer will become shallower into the weekend. A gradual warming is expected over the weekend into early next week. For Extreme Southwestern California Including Orange... San Diego...Western Riverside and Southwestern San Bernardino Counties 9pm Update: Satellite depicts low clouds filling back in over much of the coastal basin, and the 00z Miramar sounding shows a roughly 5C inversion based near 5000 FT MSL. Clouds will cover much of the coastal basin this evening through Friday morning with abundant marine layer moisture and onshore flow in place. The approach of another, larger 500mb trough will not only support additional light showers/drizzle tonight, but also maintain gusty onshore winds. The strongest winds, per surface observations, are occurring in the San Gorgonio Pass near Whitewater, where gusts of 55-65 mph continue this evening. The forecast appears on track and no changes were made to the gridded forecasts or any Wind Advisory products. From Previous Discussion: Visible satellite at 130pm this afternoon was showing widespread cloud coverage across the coastal basin. Clear skies were prevailing in the mountains and deserts. The marine layer will remain deep into Friday as a low pressure system digs south into the Great Basin. This will keep the atmosphere unsettled, with periods of passing shortwaves moving through the mean flow ahead of the core of the system. The passing shortwaves are expected to generate areas of scattered light showers or drizzle as they interact with deep marine layer moisture tonight into early Friday morning. As the core of the low digs into the Great Basin Friday afternoon and evening, periods of light showers are expected to develop. Coast and valley areas in San Diego county as well as the coastal mountain slopes are the most likely places to see a shower. Most areas will see 0.05 inches of rain or less, but a few locations may accumulate up to 0.15 inches if showers train across that particular area. 0.10 to 0.35 inches of rain are possible in the mountain foothills. Light snow accumulations are possible above 7000 ft Friday evening. Periods of gusty westerly winds will continue over the mountains and into the deserts through Friday night. Peak gusts for this afternoon into early Friday morning will be mostly 50 to 60 mph on the desert mountain slopes. Gusts 40 to 50 mph possible in the deserts. Local gusts up to 70 mph possible through the San Gorgonio Pass near Whitewater. Gusty winds will continue for Friday afternoon into early Saturday. There is a potential for more widespread coverage of stronger wind gusts on Friday as a low pressure system moves into the Great Basin and east into the Four Corners region. Peak Gusts of 50 to 65 mph are expected on the desert mountain slopes. Gusts in the deserts will peak at 40 to 50 mph. There will also be the potential for gusts 70 to 75 mph in wind prone locations like through the San Gorgonio Pass. Widespread below average high temperatures are expected tomorrow and Saturday. By Sunday, highs will warm to near average, with some locations still a degree or two cooler than average for this time of year. Further warming is expected into early next week. By the middle of next week, some uncertainty develops in the upper level pattern, with some ensemble solutions showing troughing while others maintain a weak ridge. This introduces uncertainty into the temperature forecast, with the potential for cooler conditions to return. This uncertainty also impacts the depth of the marine layer. Current forecast follows NBM with a few degrees of cooling on Thursday with a shallower marine layer for early next week, slowly deepening into the middle to end of next week. Marine Stronger winds and higher seas will generate hazardous boating conditions Friday through early Saturday, especially beyond 15 NM offshore. A few gales are possible Friday night near San Clemente Island. The Small Craft Advisory contains further details. Calmer winds and seas are expected this weekend into the middle of next week. Skywarn Skywarn activation is not requested. However weather spotters are encouraged to report significant weather conditions. NOAA San Diego CA Office: Watches - Warnings - Advisories CA...Beach Hazards Statement from Friday afternoon through Saturday morning for Orange County Coastal Areas-San Diego County Coastal Areas. Wind Advisory until 11pm PDT Friday for Apple and Lucerne Valleys-Coachella Valley-Riverside County Mountains-San Bernardino County Mountains-San Diego County Deserts-San Diego County Mountains-San Gorgonio Pass Near Banning. PZ...Small Craft Advisory from 1pm Friday to 7am PDT Saturday for Coastal Waters from San Mateo Point to the Mexican Border and out to 30 nm. Small Craft Advisory from 3am Friday to 11am PDT Saturday for Waters from San Mateo Point to the Mexican Border Extending 30 to 60 nm out including San Clemente Island. |
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