Marine Weather and Tide Forecast for Boulevard, CA

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

This evening...The marine layer remains shallow while a few patches of low clouds begin to form along the coast and over the coastal waters. High-resolution models show the low clouds and fog increasing in coverage along the coast but only spreading a few miles inland. Elevated coastal terrain has about a 40-60 percent chance for fog with visibility one mile or less.

From previous discussion...
Temperatures on Wednesday will be a few degrees higher than today, with areas of moderate HeatRisk expected in inland Orange County, the valleys, and low deserts. Based on the current forecast, the Inland Empire and the low deserts have the most widespread coverage of moderate HeatRisk. High temperatures in the Inland Empire are expected to reach the mid to upper 90s on Wednesday, with highs in the low desert expected reach 105 degrees. Chances of the Inland Empire exceeding 100 degrees on Wednesday is locally 15 to 20 percent in the warmest locations, elsewhere chances are less than 10 percent.

Highs on Thursday will be a few degrees cooler than Wednesday west of the mountains, with a couple additional degrees of warming in the low desert. Chances of temperatures in the low desert exceeding 110 degrees are slim to none for Wednesday and Thursday. By Friday, all areas will be 5 to 7 degrees cooler than Thursday as a low pressure system moves across the Pacific Northwest. There is a less than 5 percent chance of high temperatures reaching or exceeding 105 degrees in the low desert on Friday. West of the mountains the Inland Empire locally has a 20 to 30 percent chance of exceeding 90 degrees Friday with those chances confined to the typically hottest locations, elsewhere chances are less than 10 percent. In addition to cooler conditions, the afternoon sea breeze winds will be enhanced on the desert mountain slopes into the deserts. Peak gusts Thursday and Friday afternoon and evening are expected to be 30 to 40 mph, with local gusts up to 50 mph through the favored passes.

Additional cooling is expected on Saturday with high temperatures within a few degrees of average. Saturday high temperatures will range from the mid to upper 60s near the coast to the upper 70s to mid 80s for the Inland Empire with the mid 90s to around 100 for the lower deserts. The marine layer will deepen to around 2500 feet for the weekend. Night and morning coastal low clouds will spread inland into portions of the inland valleys with slower or more limited afternoon clearing near the coast. Sunday may warm slightly followed by minor day to day differences through the middle of next week.
Coastal low clouds will continue to spread into portions of the valleys each night and morning.

AVIATION
210330Z
Coast
Mostly clear skies through Wednesday. Except for patchy low clouds and fog to redevelop after 06Z, with any cigs 200- 400 feet MSL and vis 0-5SM, most likely near KSAN and between 10-15Z Wednesday. BKN-OVC clouds with similar cigs redevelop Wednesday evening between 02-06z Thursday. 30-40% chance for VIS reduction below 1SM for San Diego County coastal sites.

Elsewhere...Clear with unrestricted vis through Wednesday.

MARINE
No hazardous marine conditions are expected through Sunday.

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

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