textproduct: San Diego

SYNOPSIS

Above average temperatures and weak offshore flow will continue today. For tonight into Thursday, the marine layer will slowly deepen with low clouds and fog spreading into coastal areas by early Wednesday and into portions of the valleys for early Thursday. A low pressure system from the northwest will bring cooling for Wednesday through Friday along with a chance of showers for late Thursday through Friday. Then drier and warmer for the weekend into early next week.

SHORT TERM (Today through Thursday)

There is weak east to northeast lower level flow with patchy low clouds and fog mostly remaining off the coast and over portions of the coastal waters. A weak coastal eddy may develop today or tonight with coastal low clouds and fog increasing in coverage over the coastal waters into coastal areas for tonight into Wednesday morning. The gradual deepening of the marine layer is expected to continue into Thursday.

High temperatures for today will be as much as 8 to 12 degrees above average for the inland valleys with high temperatures ranging from around 70 near the coast to the mid 70s to lower 80s for the valleys with the lower deserts in the upper 70s. High temperatures on Wednesday will be a few to around 5 degrees cooler than today with Thursday as much as another 4 to 8 degrees cooler for the mountains and valleys.

A closed low pressure system developing off the California coast on Wednesday will bring a chance of showers to southwestern California some time around late Thursday through Friday.

LONG TERM (Friday through Monday)

Chances for showers will continue into Friday. Chances for one- half inch or more of rainfall for Thursday through Friday ranges from around 10 percent near the coast to around 20 percent for the mountains. Snow levels will be around 6500 to 7000 feet.

High temperatures will continue to cool through Friday with Friday high temperatures a few degrees above average for the deserts and a few to around 5 degrees below average elsewhere. High temperatures on Friday will be mostly in the 60s for the coast and valleys and in the lower 70s for the lower deserts.

There will be drying and gradual warming for the weekend into early next week with high temperatures on Monday of next week a few to around 5 degrees above average. High temperatures on Monday of next week will range from the mid to upper 60s near the coast to the lower to mid 70s for the valleys and inland Orange County with the lower deserts in the lower to mid 70s.

AVIATION

201030Z...Coast...Patchy low clouds and FG over coastal waters could briefly touch the coast through 16Z. 20% chance of impacting coastal airports with bases 400 feet MSL and vis 0-2SM. Higher confidence for better coverage of low clouds after 02Z tonight into Wednesday. Bases would be around 400-700 feet MSL and vis 5SM or above.

Valleys/Mountains/Deserts...North and east winds remain elevated for pockets of foothills downstream of mountain passes with gusts 25-35 kts early this morning before relaxing 15-18Z.

MARINE

No hazardous marine conditions are expected through Saturday.

SKYWARN

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

SGX WATCHES/WARNINGS/ADVISORIES

CA...None. PZ...None.