textproduct: Los Angeles

SYNOPSIS

03/856 AM.

Near to slightly above normal are temperatures expected through at least Saturday, except significant cooling in the mountains and interior areas starting Thursday. Strong and gusty winds expected across much of the area Wednesday night into Thursday morning. Strong Santa Ana winds possible over weekend with warming temperatures.

LONG TERM (SAT-TUE)

03/145 PM.

Adding more uncertainty to the forecast for early next week, based on the latest projections the upper low will reverse course late Sunday and move back onshore Monday and Tuesday. A small percentage of the ensemble solutions indicate that the upper low will pick up some moisture off the Pacific Ocean and drop some light wrap around showers as far north as southern LA County. This will most likely not happen but it's not a zero chance either. In any case, with the low moving inland and pressure gradients rapidly trending onshore temperatures are expected to cool slightly into early next week.

AVIATION

04/0608Z.

At 0353Z over KLAX, the marine layer depth was 800 feet deep at KLAX. The top of the inversion was near 2200 feet with a temperature around 19 degrees Celsius.

Low to moderate confidence in low clouds arriving to coastal and coastal valley terminals tonight, with lowest confidence at KOXR, KCMA, KBUR and KVNY. 40% chance for IFR-MVFR conds at KSBA after 10Z. Min flight cat may be off by one cat.

High confidence in increasing northwest to north winds region wide through the day, with north winds increasing across LA County sites (including LAX) Wednesday night.

KLAX...Moderate confidence in TAF with a 20 percent chance that VFR conds prevail. Otherwise, arrival may be off by 2 hours and min cig height off by +/- 300 ft. Any east wind component should remain less than 7 kt, however, high confidence in northerly cross winds with gusts up to 30 kt developing sometime 05/02Z-06Z, decreasing Thursday morning to around 10-15 kt, then increasing again to around 20-25 kt Thursday night.

KBUR...Low confidence in TAF. 40% chance VFR conds prevail. North winds will increase in strength rapidly after 00Z, with gusts up to 25 kt possible 00Z-06Z.

MARINE

03/853 PM.

Moderate to high confidence in the current forecast; seas could be up to 1-3 feet higher than forecast, especially between Wednesday and Saturday.

Widespread SCA level winds are expected to rapidly increase again this afternoon. SCA level winds will affect the outer waters and the nearshore waters along the Central Coast through this afternoon. Then, widespread strong SCA and GALE conditions (winds and seas) will develop tonight through Friday.

An offshore flow pattern will set up Friday through Sunday, with a moderate (30 to 50 percent) chance of gales inside the southern California bight and SCAs to the nearshore waters along the Central Coast, with winds likely peaking on Saturday.

LOX WATCHES/WARNINGS/ADVISORIES

CA...Wind Advisory in effect from midnight Wednesday night to 9 AM PST Thursday for zones 87-366-367. (See LAXNPWLOX). Wind Advisory in effect from 6 PM Wednesday to 9 AM PST Thursday for zones 88-371>375. (See LAXNPWLOX). Wind Advisory in effect from 4 PM Wednesday to 9 AM PST Thursday for zones 349-351-352-381>383. (See LAXNPWLOX). High Wind Watch in effect from Wednesday afternoon through Friday morning for zones 353-376>378. (See LAXNPWLOX). High Wind Watch in effect from late Wednesday night through Thursday morning for zones 362-369-370. (See LAXNPWLOX). High Wind Watch in effect from Wednesday evening through Thursday morning for zones 379-380. (See LAXNPWLOX). PZ...Small Craft Advisory in effect until 3 PM PST Wednesday for zones 645-650. (See LAXMWWLOX). Gale Warning in effect from 3 PM Wednesday to 9 AM PST Thursday for zones 645-650. (See LAXMWWLOX). Gale Warning in effect from 10 PM Wednesday to 10 AM PST Thursday for zone 655. (See LAXMWWLOX). Small Craft Advisory in effect until 3 AM PST Wednesday for zones 670-673-676. (See LAXMWWLOX). Gale Warning in effect from 3 PM Wednesday to 3 AM PST Friday for zone 670. (See LAXMWWLOX). Gale Warning in effect from 3 AM Wednesday to 3 AM PST Friday for zones 673-676. (See LAXMWWLOX).