25/222 AM.
Very hot conditions will dominate the week, with a high risk for heat illness. Patchy night through morning low clouds and locally dense fog will be confined to some coastal areas. Significant cooling is likely over the weekend but it will remain warm.
(tdy-Fri), 25/159 PM.
So far today high temperatures across LA/Ventura coast and valleys have trended similar to yesterday, and in some areas highs are slightly cooler. However, interior areas and the Central Coast are warming significantly.
The forecast remains on track with a few more degrees of warming tomorrow then starting to level off Thursday. Most of the forecast models are still indicating additional weakening of the onshore flow tomorrow which should result in warmer temperatures everywhere, including the Central Coast where offshore trends will again push temps higher.
A little uncertainty now with the Thursday and Friday forecast as models are beginning to show increasing mid and high level moisture moving in from Iselle off the southern Baja Coast. Can't rule out a stray light shower, though most of the unstable air will actually move north into the Bay Area. The increasing clouds could cut into some of the high temperatures slightly, though increasing humidity make it feel just as uncomfortable.
Here is a list of the current high temperature records today:
Downtown LA. ..102 in 1926 LAX. . . ..84 in 1981 Long Beach. , 103 in 1981 Hawthorne. . 87 in 1015 Santa Monica. .83 in 2005 Burbank. . ..107 in 1981 Van Nuys. . .107 in 2010 Woodland Hills, 115 in 1985 Palmdale. . .108 in 1931 Lancaster. . 107 in 2010 Camarillo. . 85 in 1931 Oxnard. . , 85 in 1931 Santa Barbara. 85 in 1985
(Sat-Tue), 25/208 PM.
Models are in good agreement with a 3-6 degree cooling trend Saturday as onshore flow returns despite little change in the position or strength of the upper high in AZ. However, the high does weaken quite a bit Sunday into next week which will continue the cooling trend through at least Monday. At that point high temperatures will be near to even slightly below normal area-wide.
25/1637z.
At 1615Z at KLAX, the marine layer was 1100 feet deep. The top of the inversion was 3100 feet with a temperature of 29 degrees Celsius.
For 18Z TAF package, high confidence in KPRB, KSBA, KBUR, KVNY, KPMD and KWJF.
For KSMX and KSBP, there is 20-30% chance of LIFR/VLIFR conditions 08Z-17Z.
For KOXR, KCMA, KSMO, KLAX and KLGB, there is a 20% chance of IFR/LIFR conditions 08Z-17Z.
KLAX, High confidence in 18Z TAF. There is a 20% chance of IFR/LIFR conditions 08Z-17Z. No significant easterly wind component is expected.
KBUR, High confidence in 18Z TAF as CAVU conditions are expected through the period.
25/1232 PM.
For the Outer Waters, high confidence in current forecast. Today through Sunday, Small Craft Advisory (SCA) level winds are expected across all of the Outer Waters. Additionally, seas will hover near SCA levels through the week.
For the Inner Waters north of Point Sal, high confidence in current forecast. Today through Sunday, SCA level winds are expected each afternoon and evening. Additionally, seas will approach SCA levels by late this week.
For the Inner Waters south of Point Conception, moderate to high confidence in current forecast. For a majority of the southern Inner Waters, high confidence in winds and seas remaining below SCA levels through Sunday. The only exception will be the Western half of the Santa Barbara Channel where there is a 30-40% chance of SCA level winds tonight through Wednesday night then a 60-80% chance Thursday through Sunday, mainly in the late afternoon and evening hours.
25/1232 PM.
Southerly swell from Tropical Storms Iselle and Julio will move into the coastal waters late tonight and continue through Thursday. Swell heights of 3-5 feet with a period around 14 seconds can be expected. producing elevated surf and dangerous rip currents along south-facing beaches of Ventura and LA counties. Therefore, a BEACH HAZARDS STATEMENT is in effect from 500 AM Wednesday trough 11 PM Thursday.
Ca, Extreme Heat Warning in effect until 8 PM PDT Friday for zones 38-87-88-349>358-362-366>376-378>383-548. (See LAXNPWLOX). Beach Hazards Statement in effect from late tonight through Thursday evening for zones 87-354-362-366. (See LAXCFWLOX). Heat Advisory in effect from 10 AM Wednesday to 8 PM PDT Thursday for zones 341-347-348. (See LAXNPWLOX). Heat Advisory in effect until 8 PM PDT Friday for zones 342>345. (See LAXNPWLOX). Red Flag Warning in effect until 3 PM PDT Friday for zones 345-353-375>380. (See LAXRFWLOX). PZ, Small Craft Advisory in effect until 3 AM PDT Wednesday for zone 645. (See LAXMWWLOX). Small Craft Advisory in effect until 3 PM PDT Thursday for zones 670-673-676. (See LAXMWWLOX).
