textproduct: Los Angeles

SYNOPSIS

02/144 AM.

A major and long lasting heat wave will begin today and last through all of next week with dangerously hot temperatures. Coastal clouds and fog are expected this morning and tonight into Saturday morning, with dense fog possible 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

02/1634Z.

At 16Z at KLAX, there was no marine layer. There was a surfaced based inversion with a top at 1700 ft and a temperature of 30 C.

High confidence in VFR TAFs for all sites expect for KSMX, KSBA, & KSBP. Chance for low clouds (LIFR or lower): KSMX (60%), KSBA (20%), & KSBP (20%). No wind issues expected.

KLAX...High confidence in VFR TAF. Good confidence that any east wind component remains below 8 kts.

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

MARINE

02/1259 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 near Point Conception, off the coast of Point Dume, and across the San Pedro Channel.

BEACHES

02/1259 PM.

While we will get a break from the coastal flooding concerns for the rest of the week, another hurricane swell (from Rachel) will likely bring a larger-than-Polo south 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. 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 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.