San Diego, California

Widespread light rain will continue this morning, becoming more scattered during the day before tapering off this afternoon and evening. Dry and warmer for the remainder of the week with highs near to a few degrees below normal each day.

FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...

UPDATED AVIATION DISCUSSION

Morning water vapor imagery shows the upper level trough beginning to move across the California Bight with a weak Atmospheric River feeding into far southern CA. Widespread light rainfall continues this morning with rainfall rates generally 0.10 inch/hour or less. Isolated heavier showers with rates near 0.30-0.50 inch/hour are possible later this morning as colder air aloft moves overhead. Rain will transition to more scattered showers around sunrise, then taper off from north to south this afternoon, ending by late evening.

Additional rainfall totals will range anywhere from 0.25-0.75" for the coasts to the mountains, locally 1" or more in the San Diego County Mountains, and 0.05-0.30" in the deserts, highest in San Diego County. Snow levels near 9500-11000 ft this morning will gradually fall to 7000-7500 ft this evening as precipitation ends, with only a light dusting on the highest peaks of the San Bernardino and San Jacinto Mountains. Otherwise cool today with high temperatures 10-15 degrees below normal.

An upper level ridge of high pressure moves in from the west on Monday and Tuesday. This ridge, aided by weak offshore flow, will provide warmer and drier weather Monday and Tuesday, though highs will still be a few degrees below normal - generally low to mid 70s across the coastal basin, mid 60s to mid 60s in the mountains, upper 60s to low 70s in the high desert, and upper 70s to low 80s in the low desert.

Another upper trough moves through California late Tuesday into Wednesday morning, but at this time chances of measurable precipitation are less than 10%. Another round of weak offshore flow follows for the remainder of the day Wednesday into Thursday under weakly cyclonic flow, bringing minor warming. Ensembles begin to diverge a bit more Friday and Saturday with the potential development of another low digging into the Desert Southwest. Around 23% of the ensemble members have a deeper low for cooler weather but slightly stronger offshore flow, while the remaining members have a much weaker trough Friday and ridging by Saturday for weaker offshore flow and warmer weather.

011130...Widespread rain has mostly moved out of the region this morning, but plenty of showers still moving northeast over the region. With multiple cloud layers 1500 to 6000 ft MSL, expect frequent cat changes throughout the coastal basin, especially when - SHRA pass over a site. Iso brief IFR continues to be possible this morning, mostly for inland valleys. Cigs around 3000 ft in the deserts expected to scatter out by 16Z.

Conditions start to improve 14-18Z this morning as showers become more isolated, though intermittent MVFR conditions with passing -SHRA continues to be possible. ISO -SHRA will linger through Sunday evening in San Diego County and in the mtns but taper off elsewhere this afternoon.

Westerly winds increase this afternoon and evening with widespread gusts 20-25 knots and rough, choppy seas through the outer coastal waters, and gusts just under 20 knots in the inner coastal waters. A Small Craft Advisory is in effect for the outer coastal waters from 11AM - 9PM today. Weaker winds expected Monday, followed by more elevated onshore winds Tuesday afternoon and evening, with gusts in the outer coastal waters potentially exceeding 20 knots.

Southwesterly swell (3 ft at 15 seconds from 200 degrees) will bring elevated surf through Monday, with breaking wave heights 3 to 6 feet. High tides just above 6 feet will potentially lead to local tidal overflow during high tides in areas where breaking waves approach 5-6 feet, mostly on southwest facing beaches today.

Skywarn activation is not requested. However weather spotters are encouraged to report significant weather conditions.

CA

None.

PZ

Small Craft Advisory from 11 AM this morning to 9 PM PST this evening for Waters from San Mateo Point to the Mexican Border Extending 10 to 60 nm out including San Clemente Island.