Marine Weather and Tide Forecast for Laguna Niguel, CA

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

Updated aviation/marine discussion

The main cold front is making it's way across the Inland Empire and San Diego county as of 11:30 AM. The front is expected to weaken as it continues to move east. Light to locally moderate rain is expected with the frontal passage, with peak rainfall rates 0.20-0.30 inches per hour. A rainfall summary has been headlined on our weather.gov/sandiego homepage to capture the rainfall totals today. After the passage of the front, scattered light to locally moderate showers may develop around the coastal basin this evening into Monday morning. The next shortwave is expected to move across Southern California mid-day Monday which will spark another round of scattered light to locally moderate precipitation. Peak rainfall rates on Monday are expected to be 0.20 inches per hour or less.

At higher elevations in the mountains, snow can be expected. Snow levels are currently around 7500 ft and are expected to drop to 6000 ft by tonight, lingering at 5500-6000 ft on Monday. Around an inch of snow is expected below 7000 ft, with up to 4 inches above 7000 ft. Periods of breezy winds over the mountains and into the deserts is expected through Monday. Peak gust of 35-55 mph will occur in the afternoons and early evenings.

Cooler and dry conditions with weaker winds expected on Tuesday.
Another trough of low pressure is expected to dig into the Pacific Northwest sometime Wednesday into Thursday. The broad troughing pattern will keep temperatures near to slightly below average for most locations and increase westerly winds in the mountain and desert again. This low is expected to stay inland, which will keep us dry and bring chances for Santa Ana winds for the end of the week. Weak ridging combined with offshore flow is expected to bring warmer conditions to the area next weekend.



AVIATION
130030Z
Coasts/Valleys
SCT-BKN low clouds based 3000-6000 ft MSL over the coastal basin will remain in place through tonight.
Generally VFR conditions through 12z Mon with coverage of -SHRA remaining isolated at best. Thereafter, a slight uptick in shower activity is expected, especially in San Diego County. Intermittent MVFR cigs/vis in -SHRA/SHRA. Shower activity decreases again from north to south from 18z Mon-00z Tue.


Mountains/Deserts
West to southwest winds gusts 30-40 kts currently through mountain passes, along deserts slopes and locally into the deserts. Winds weaken gradually this evening, but remain elevated through the night with occasional gusts 20-30 kts along the desert floor and frequent gusts 25-35 kts along slopes and through passes. Winds strengthen again after 21z Mon with gusts 25- 40 kts, similar to this afternoon. Isolated SHRA/SNSH activity will continue along coastal slopes through Monday morning with an uptick in shower coverage Monday afternoon. FG through the period where clouds intersect terrain.

Otherwise, current satellite indicates mountain waves are present through most of the Inland Empire and deserts. Mod up/downdrafts expected through Monday morning in lee of mtns.

MARINE
Northwest winds will briefly strengthen again for outer coastal waters Monday afternoon and evening with gusts 15 to 20 kts. Choppy seas may create hazardous conditions.Otherwise, no hazardous conditions expected through Friday.

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



SGX WATCHES/WARNINGS/ADVISORIES
CA...None.
PZ...None.