textproduct: San Diego

SYNOPSIS

Onshore flow will strengthen through Wednesday with stronger and gusty southwest to west winds for the mountains and deserts each afternoon and evening with gusts to 35 to 45 mph into Tuesday evening, and to 45 to 55 mph for late Tuesday night into Wednesday. Onshore flow will also spread cooling inland through Wednesday with high temperatures for Wednesday and Thursday within a few degrees of average. There is a chance of light showers for late Tuesday into Wednesday morning. Friday through next weekend will be warmer and drier with high temperatures warming to 10 to 15 degrees above average for inland areas next Sunday.

SHORT TERM (Today through Wednesday)

Early this morning the marine layer is around 1200 feet deep with satellite imagery showing areas of low clouds and along portions of the coast of Orange and San Diego Counties extending locally inland into coastal areas. The most likely locations for dense fog will be near higher coastal terrain.

A low pressure system moving across the eastern Pacific will move inland through southern California late Tuesday. Onshore flow will strengthen into Wednesday. Southwest to west winds will be strongest for the mountains and deserts during the afternoons and evenings with gusts to 35 to 45 mph for today and Tuesday and with gusts to 45 to 55 mph for late Tuesday night and Wednesday.

Cooling will spread inland through Wednesday with Wednesday high temperatures falling to within a few degrees of average, ranging from the upper 60s to around 70 near the coast to the lower to mid 70s for the valleys and inland Orange County with the lower deserts in the 80s.

There is a chance of light showers for late Tuesday into Wednesday morning for Orange and southwestern San Bernardino Counties from the coast to the mountains with a slight chance for San Diego County and western Riverside County from the mountains westward. For the San Bernardino County mountains, one-tenth inch or less to locally one-qaurter inch is possible. Elsewhere from the coast to the mountains, a few hundredths of an inch or less is expected. The snow level will be mostly above 8000 to 8500 feet through Tuesday night, lowering to around 7500 feet Wednesday morning.

LONG TERM (Friday through Thursday)

There will be drying with warming for Friday through next weekend. High temperatures will warm to 10 to 15 degrees above average for inland areas next Sunday. High temperatures for next Sunday will range from the lower to mid 70s near the coast to the mid to upper 80s for the Inland Empire with the lower deserts in the 90s.

AVIATION

300930Z...Low clouds are gradually covering all coastal areas this morning. Cigs will be around 300-600 feet MSL with tops to 700 feet. Vis reduced 3-5SM, but 0-2SM on coastal mesas and hills. Scatter out expected 16-18Z. Patchy low clouds could persist at the immediate coast thereafter. More uniform low clouds will push ashore after 00Z and farther inland into some inland valleys overnight. Bases would be higher around 800-1200 feet MSL with vis reductions inland.

Above and beyond the marine layer, VFR conditions will prevail today and tonight. High clouds will increase and lower to about 150000 feet MSL tonight into Tuesday.

MARINE

No hazardous marine conditions expected through Wednesday. Northwest winds increase Thursday to near 20 kts.

SKYWARN

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

SGX WATCHES/WARNINGS/ADVISORIES

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