textproduct: San Diego

SYNOPSIS

Cooler with decreasing winds today. Thursday will be a little warmer with dry conditions. Cooler conditions likely Friday through the weekend, with periods of increased winds. Saturday evening into Sunday morning there is a chance of precipitation over and west of the mountains. Continued troughing aloft will continue slightly below average temperatures and windier conditions with chances of precipitation into the middle of next week.

Updated Aviation and Marine Discussion

Cloudy conditions will prevail into the afternoon with below average temperatures. Highs will warm a few degrees into Thursday before a cooling trend Friday through the weekend. The upper level pattern is expected to remain troughy into the middle of next week, which will keep temperatures near to below average, with periods of clouds and increased winds at times.

This weekend, an area of low pressure is expected to move across Central California. That will bring an increase in winds and potential for precipitation over and west of the mountains. Southwest to west winds will increase over the mountains and into the deserts Friday through Sunday, with strongest gusts expected on Saturday afternoon and evening. Peak gusts of 40 to 50 mph, locally up to 65 mph possible. Light precipitation is expected with the passage of this low, with the most likely time for any precipitation to be Saturday afternoon into Sunday morning. Overall, rainfall totals are expected to be on the lighter side. NBM chances for rainfall to exceed 0.25" is 15-30% in the mountains and less than 10% elsewhere.

Dry and warmer conditions expected to return for next Monday, with high temperatures for inland areas still a few to around 5 degrees below average. Another disturbance moving through the mean flow is expected mid-week, which would keep conditions on the cooler side and increase winds and precipitation chances.

AVIATION

222330Z...Coast/Valleys...Patchy low clouds based 2000-2500 ft MSL will redevelop over San Diego County 03-06z Thu. Clouds become more confined to coastal areas after 09z and may spread into coastal Orange County, but coverage should remain patchy. Any remaining low clouds scatter by 12-15z. Otherwise, SCT-BKN high clouds AOA 20 kft expected from early Thursday morning through the afternoon.

Mountains/Deserts...West winds will continue this evening with gusts 25-35 kts, locally 40 kts through passes and along desert slopes. Local up/downdrafts in lee of mountains and patchy BLDU reducing vis in the deserts. Winds will begin to ease around 12-15z Thursday.

MARINE

West-northwest winds will gust 20-25 kts in the outer waters this afternoon through tonight, generating choppy and hazardous conditions. More details can be found in the Small Craft Advisory. No additional hazardous marine conditions are expected Thursday 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...Small Craft Advisory until 3 AM PDT Thursday for Waters from San Mateo Point to the Mexican Border Extending 10 to 60 nm out including San Clemente Island.