textproduct: Los Angeles

SYNOPSIS

02/526 PM.

A major and long lasting heat wave is expected to persist through all of next week with dangerously hot temperatures. Coastal clouds and fog are expected tonight into Saturday morning, with dense fog likely at times.

LONG TERM (TUE-FRI)

02/145 PM.

Monday into the rest of the week will feel a lot like this coming weekend, with ongoing offshore winds and persistent high pressure. Will likely see some fluctuations in temperatures as the offshore gradient weakens a bit early in the week, though there are still some model solutions indicating a little more upper level northeast wind support and subsequently even hotter temperatures around Wednesday into Friday, leading to breaking daily high temperature records. Further out, models indicate tropical moisture along with an upper level trough could lead to cooling temperatures by the following weekend.

AVIATION

03/0024Z.

At 2355Z at KLAX, there was no marine layer. There was a surface based inversion with a top at 900 ft and a temperature of 32 C.

High confidence in VFR TAFs for all sites away from the coast, and moderate to high confidence in LIFR/VLIFR conds at KSMX overnight. Low to moderate confidence in VFR conds for the remaining sites with a 30-40% chance of low clouds occuring overnight. LIFR/IFR conds are likely if clouds do occur. No wind issues expected.

KLAX...Moderate confidence in VFR conds for the 00Z TAF. There is a 20% chance of low clouds overnight, with a 30% chance of IFR VSBY around 3SM. Good confidence that any east wind component remains below 8 kts.

KBUR...High confidence in the VFR 00Z TAF. No wind issues expected.

MARINE

02/737 PM.

Generally quiet conditions expected across the coastal waters through the forecast period. Localized Small Craft Advisory (SCA) gusts may occur each afternoon and evening between Point Conception and San Nicolas Island, off the coast of Point Dume, and across the San Pedro Channel.

BEACHES

02/807 PM.

Quiet conditions are expected through the weekend, aside from the heat. Meanwhile, another hurricane (Rachel) will likely bring a larger- than- Polo southerly swell to southern California for much of the coming work week. The window of most concern is Tuesday through Friday. Elevated surf up to 5-6 ft is likely with a lower chance of high surf 7ft or higher across exposed south facing beaches. High tides of 6.5-7.0 ft are expected. Unlike previous events, morning and evening tides will be similar in height. Initially, the swell will have a more SE direction (150-160) targeting areas like Long Beach Tuesday and Wednesday. As Rachel moves westward, the swell direction will become more southerly (170-190) Thursday and Friday targeting areas like Zuma. There is a high risk for Beach Hazard Statements and a moderate risk for Coastal Flood Advisories and High Surf Advisories along the LA/VTA coastline. Stay tuned for future updates.

LOX WATCHES/WARNINGS/ADVISORIES

CA...Extreme Heat Warning in effect until 8 PM PDT Thursday for zones 38-87-88-349>358-362-366>375-548-550. (See LAXNPWLOX). Heat Advisory in effect from 10 AM Saturday to 8 PM PDT Sunday for zones 341>345-347-348. (See LAXNPWLOX). PZ...NONE.