09/115 PM.
Temperatures away from the coast will warm into the 80s and 90s through Monday. 100 degree readings may occur locally in the warmest valleys and Antelope Valley Sunday and Monday. Coastal low clouds will develop each night through the weekend. Cooling will begin on Tuesday.
(tdy-Tue), 10/1209 AM.
An upper level ridge will build over the area today through Monday and then will then shift to the east over Arizona on Tuesday. At the surface, onshore flow will weaken slightly through Monday then increase a bit on Tuesday.
Look for a warming trend today and Monday as the high builds and the marine layer shrinks. Away from the coast, high temperatures will climb into the mid 80s to mid 90s across the valleys and to near 100 degrees across the deserts. The marine layer, however, will keep the coasts and esp the nearshore areas noticeably cooler. At this time, heat risk looks to range from the minor to moderate categories. So, do not see any widespread heat issues that would require any advisories at this time, but that will be monitored closely. On Tuesday, as the ridge moves east, a 5-10 degree cooling trend can be expected for most areas.
Otherwise, no significant issues are expected through the short term. Marine inversion will remain entrenched along the coast, so low clouds and fog will continue to be an issues for the coastal plain and lower coastal valleys. Otherwise, skies should remain mostly clear through Tuesday. As for winds, the continued onshore pressure gradients will generate gusty southwesterly winds across interior sections each afternoon/evening, but any advisory-level winds are expected to remain isolated.
(Wed-Sat), 10/228 AM.
Pretty benign weather on tap for Wed and Thu. An upper low will move across the northern half of the state. Hgts will lower and mdt to stg onshore flow will persist. This will keep the May Grey pattern going overnights and into the morning hours. More cooling will bring max temps into the mid 60s to lower 70s for the csts and the mid 70s to lower 80s across the vlys.
Rising hgts and offshore trends will reduce the amount of low clouds on Fri and Sat and kick off a warming trend. There will be some gusty northerly winds are through the I-5 corridor and the westerly Santa Ynez range as well.
10/0931z.
At 0837Z at KLAX, the marine layer was 1100 feet deep. The top of the inversion was at 3500 feet with a temperature of 20 C.
high confidence in CAVU conditions for KWJF and KPMD.
For all other sites, moderate confidence in TAFs. Timing of flight category changes could be +/- 2 hours of current forecasts.
KLAX, Moderate confidence in TAF. Timing of flight category changes could be +/- 2 hours of current forecasts. No significant easterly wind component is expected.
KBUR, Moderate confidence in TAF. Timing of flight category changes could be +/- 2 hours of current forecasts.
10/1204 AM.
Small Craft Advisories (SCA) will follow the Gale Warnings that were in effect last night across the outer zones near and north of Point Conception. Large seas will begin to subside today and tonight as the winds weaken. In addition, Small Craft Advisory winds will affect the waters from Santa Cruz Island to San Nicolas Island through this afternoon.
By Monday, conditions should be below SCA levels throughout the waters and are expected to remain below advisory levels through Tuesday. From Wednesday through Friday, chances for SCA level winds will increase each day especially across the outer waters.
Ca, NONE. PZ, Small Craft Advisory in effect until 3 AM PDT Monday for zones 670-673. (See LAXMWWLOX). Small Craft Advisory in effect until 3 PM PDT this afternoon for zone 676. (See LAXMWWLOX).
