textproduct: Los Angeles

SYNOPSIS

12/1256 PM.

Several degrees of cooling are expected through Wednesday as an upper low moves through northern California. Low clouds and fog will move into the coastal valleys with clouds lingering at some coastal areas through today. Gusty winds are expected times across the mountains and deserts. Slight warming is expected Thursday into Friday.

LONG TERM (SAT-TUE)

12/1256 PM.

Below normal confidence this weekend into early next week as a sharp trough (for May) is poised to pass nearby. An inland track (50 percent chance) would lead to near normal temperatures with breezy winds nearing advisory levels for some interior areas such as the mountains near the I-5 corridor and southwest Santa Barbara County into Saturday or Sunday with the potential for offshore winds with decent warming and drying trends into Monday. A close pass (30 percent chance) would lead to gusty and probably advisory northerly winds for the interior and mostly below normal temperatures.

AVIATION

12/1751Z.

At 1725Z at KLAX, the marine layer was 2100 ft deep. The top of the inversion was at 4600 ft with a temperature of 22 C.

High confidence in VFR TAFs for desert airfields (KPMD & KWJF).

Low to moderate confidence in remainder of TAFs. Timing of flight category changes may be off by 3 hours and by one flight category.

KLAX...Moderate confidence in TAF. MVFR CIGs 015-025 expected thru 13/21Z. Periodic IFR CIGs 008 may occur through 13/15Z. 50% chance CIGs persist throughout entire forecast period. No significant east wind component.

KBUR...Moderate confidence in TAF. IFR to MVFR CIGs likely to persist through entire forecast period. 15% chance of LIFR CIGs 004 13/08Z-15Z. No wind issues expected.

MARINE

12/148 PM.

Winds and seas will remain below Small Craft Advisory (SCA) levels through Wednesday morning.

SCA conditions (winds and seas) are expected to develop across the northern Outer Waters Wednesday afternoon, expanding in coverage to include all Outer Waters by Wednesday night.

These hazardous conditions will persist into the weekend reaching portions of inner waters (along the Central Coast and SB Channel) at times.

GALE Force winds will be possible across the outer waters as early as Thursday afternoon, with highest (30-50 percent) chances on Saturday into Sunday.

Seas will continue to build into the weekend peaking 10-15 ft across the outer waters.

(For this weekend)

The combination of high winds and seas could result in hazardous surfing conditions and minor coastal flooding especially across more unprotected west-facing beaches such as along the Ventura coastline. Stay tuned for future updates.

LOX WATCHES/WARNINGS/ADVISORIES

CA...Wind Advisory in effect until 10 PM PDT this evening for zones 381-383. (See LAXNPWLOX). PZ...NONE.