textproduct: Los Angeles

SYNOPSIS

15/311 AM.

A warming trend will continue through Today, with dangerous heat expected for many areas through Thursday. Gusty northwest to north winds are forecast for southern Santa Barbara County and the LA and Ventura interior mountains during the afternoon and overnight hours through Wednesday. Cooler weather will begin to arrive on Thursday. Further cooling will bring max temperatures down to near normal on Friday/

LONG TERM (SAT-TUE)

15/310 AM.

Fairly dull summer like weather is on tap for the weekend and next week. The large upper high does not move much at all and the state will remain under the western edge. Hgts will not budge much and will hover around 591 dam. Mdt to stg onshore flow will be in place through at least Monday. Offshore trends will start on Tuesday.

The onshore flow will bring plenty of night through morning low clouds to the csts (The SBA south coast may remain mostly clear as the Sundowners will continue). The hgts may be strong enough to keep the marine layer smooshed enough to keep the stratus out of the lower vlys.

Max temps will cool some on Saturday and will be near or even a few degrees under normal. Expect little change in temps on Sun and Mon. Slight warming is possible Tue and Wed as the offshore trends develop.

There will be an increase in PWATs Sunday and this trend will continue into next week. This will make the temps feel a little more uncomfortable and could lead to some convection over the mtns in the afternoons.

AVIATION

15/1011Z.

At 0832Z at KLAX, the marine layer was 700 ft deep. The top of the inversion was at 2900 ft with a max temperature of 29 C.

Moderate to high confidence in VFR TAFs at all sites, highest confidence away from coasts. There is a 20% chance for LIFR to IFR cigs at KLAX/KSMO/KLGB 12Z-17Z.

KLAX...Fair confidence in TAF. There is a 20 percent chc of BKN004-007 cigs after 12Z-17Z. No significant east wind component expected.

KBUR...High confidence in TAF

MARINE

15/311 AM.

Small Craft Advisory (SCA) level Northwest winds across the Outer Waters and will continue through Thursday night. There is also 40% chance of Gales later today into Thursday, but confidence is not high enough to warrant a Gale Watch at this point. This determination (Gale Warning or not) will likely occur with this morning's forecast package. Seas are forecast to build to near 10 feet in conjunction with these winds. The elevated winds and seas will extend into the western Santa Barbara Channel and nearshore waters along the Central Coast each afternoon and evening through Thursday night.

Winds are expected to improve Friday through the weekend while the northwest swell lowers. However, short period choppy seas from a southerly swell associated with a tropical system to our south and west will impact our waters this weekend.

LOX WATCHES/WARNINGS/ADVISORIES

CA...Extreme Heat Warning in effect until 8 PM PDT Thursday for zones 38-88-349>353-356>358-368>375-378>383-548. (See LAXNPWLOX). Heat Advisory remains in effect until 8 PM PDT Thursday for zones 87-341>345-347-348-354-355-362-366-367-376-377-549-550. (See LAXNPWLOX). Beach Hazards Statement in effect through late tonight for zones 340-346-349-350-354-362-366. (See LAXCFWLOX). Red Flag Warning in effect from noon today to 9 AM PDT Thursday for zones 349>353-376>378. (See LAXRFWLOX). PZ...Small Craft Advisory in effect until 3 AM PDT Friday for zones 645-670-673-676. (See LAXMWWLOX).