Marine Weather and Tide Forecast for Wrightwood, CA

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

Updated Aviation/Marine Discussion

This morning, the marine layer is about 2000 ft deep and satellite imagery shows low clouds covering most of the coastal areas and extending 10-15 miles inland. We will remain under the influence of a transient upper level ridge of high pressure through today, bringing us mostly sunny skies and inland temperatures as much as 12 degrees above normal. The marine layer will keep temperatures near normal in the coastal areas where the sun will come out in the late morning after the low clouds clear.

A low pressure system currently over WA/OR will move south off the coast of central CA through Sunday before turning east and moving inland over central and southern CA through Tuesday. This system will bring increasing clouds, lower temperatures, stronger onshore flow and chances for light showers. Monday and Tuesday will be the coolest days with similar high temperatures...near normal at the coast, about 5-12 degrees below normal in the inland valleys and deserts, and 10-17 degrees below normal in the mountains. Onshore flow will begin to strengthen Sunday afternoon, peak Monday afternoon/evening then steadily weaken through Tuesday. Southwest to west winds will be strongest in the mountains and deserts where there could be wind gusts of 35 to 45 mph and isolated gusts to 60 mph. Light showers could move in as early as Monday afternoon/evening. The best chances for measurable rainfall will likely be Monday night into Tuesday morning. The rainfall distribution will favor San Diego County but totals are unlikely to exceed 0.15 inch.

A warming trend begins on Wednesday and continues into next weekend as the low pressure system moves east into the Rockies and a ridge of high pressure builds over the west coast. Friday will likely be the warmest day with daytime high temperatures reaching the 90s in the inland valleys and high deserts, and the triple digits in the low deserts. The marine layer will become shallower and low clouds will be restricted to the coastal areas during the nights and mornings.

AVIATION
021600Z
Coast/Valleys
Low clouds based 1400-1800 ft MSL with local VIS reductions 2-6SM. Vis improves (and bases lift) 15-16z and clouds scatter out inland 15-17z. Scatter out at the coast 17-19z, though some patchy low clouds to linger into the afternoon. Low clouds redevelop Saturday evening (02-04z Sun) with similar bases initially, rising above 2000 ft MSL in areas progressively throughout the night.

Mountains/Deserts
VFR conditions expected through the period with SCT-BKN high clouds AOA 20 kft after 18z Sat.

MARINE
No hazardous marine conditions are expected through Wednesday.

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



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