Marine Weather and Tide Forecast for Hacienda Heights, CA

.SHORT TERM (TDY-TUE)...05/152 PM.

Valleys and most other inland areas are warming up today as expected with light offshore flow and strong high pressure aloft.
Temps there generally running 3-6 degrees warmer than Friday and in some areas as much as as 10 degrees warmer. Quite a different story for coastal areas, especially south of Pt Conception where the marine layer has been stuck at the beaches and up to 2 miles inland all day. Despite the offshore trends temperatures in those areas have been anywhere from 2-9 degrees cooler than yesterday, the larger of those trends being in the Downtown LA area.

Models are still showing some additional offshore push Sunday to the tune of about 1.5mb more offshore than this morning. This still may not have much impact at the beaches but just inland from the beaches and into the valleys temperatures should climb at least a couple degrees, and in some cases across the inland coastal plain possibly several degrees. But as usual lower confidence for coastal areas due to the uncertainties with the stratus coverage. Not seeing much change in the pattern Monday so for most areas conditions and temperatures should be very similar to Sunday.

A cooling trend will begin Tuesday as a weak trough pushes onshore along the West Coast. Most valley area temperatures are expected to drop at least 5 degrees and some as much as 10 degrees.

.LONG TERM (WED-SAT)...05/223 PM.

The cooling trend will continue through next week with a second and deeper trough coming through next Friday which will finally bring most coast and valley area temperatures to slightly below normal. Otherwise very little interesting weather in the 7 day period. The most interesting weather feature is just outside of that period starting next Sunday when several of the EPS ensemble members continue to indicate the possibility of the first Santa Ana event of this season. This matches up well with the 12z GFS which shows a 5.4mb offshore trend next Sunday.

AVIATION
05/2252Z.

Due to a data outage, current marine layer and inversion height data is not available for KLAX.

Moderate to high confidence in 00Z TAF package. High confidence in return of CIG/VSBY restrictions to coastal sites tonight, but moderate confidence in timing (+/- 3 hours of current forecasts)
and flight category (could range between IFR and VLIFR). Moderate confidence in MVFR VSBYs for KBUR/KVNY in the 11Z-17Z time frame.
For KPRB/KPMD/KWJF, high confidence in VFR conditions through the period.

KLAX...Moderate confidence in 00Z TAF. Timing of flight category changes could be +/- 3 hours of current forecasts. No significant easterly wind component is expected.

KBUR...Moderate confidence in 00Z TAF. There is a 50% chance that MVFR VSBYs do not develop overnight.

MARINE
05/221 PM.

For the Outer Waters (off the Central Coast to San Nicolas Island), high confidence in the current forecast through tomorrow, as winds will remain below SCA (Small Craft Advisory) levels.
Winds may pick up to SCA level in the far northern portion of the northern zone (off the Central Coast) late tomorrow. However, for Monday through at least Friday, there is a 50-70% chance for widespread SCA level winds and seas. There is a 20-30% chance of low end Gale Force winds Monday thru Wed, mostly from Pt Conception to Pt Piedras Blancas.

For the Inner Waters north of Point Sal, high confidence in winds and seas remaining below SCA levels thru Monday. SCA winds and seas are possible (30-50% chance) during the afternoon thru evening hours Tuesday through at least Friday.

For the Inner Waters south of Point Conception moderate to high confidence in winds and seas remaining below SCA levels through Monday, however, local SCA level winds are possible during the afternoon and evening hours near Point Mugu and thru the San Pedro Channel tomorrow. There is a 20-40% chance of SCA winds for the western portion of the Santa Barbara Channel Tuesday thru Friday during the afternoon thru evening hours, with highest chances Tuesday and Friday.

A shallow marine layer will continue to generate patchy dense fog across portions of the coastal waters through at least Monday morning, especially in the overnight thru morning hours.
Visibilities of one nautical mile or less can be expected.

LOX WATCHES/WARNINGS/ADVISORIES
CA...Excessive Heat Warning remains in effect until 8 PM PDT Monday for zones 38-88-342>345-351>353-356>358-369>376-378>380-548. (See LAXNPWLOX).
Heat Advisory remains in effect until 8 PM PDT Monday for zones 341-348. (See LAXNPWLOX).
PZ...NONE.