01/239 AM.
Dangerously hot temperatures are expected through this weekend, with potential for significant heat impacts. Some cooling is expected next week, but temperatures will remain above normal. Dangerous surf and rip currents are expected at many of the beaches this weekend, as a result of swells from a tropical cyclone located west of Mexico.
(tdy-Mon), 01/318 AM.
The predicted hot weather became reality Friday for most areas more than 10-15 miles from the ocean. The hottest area outside of the deserts was the western San Fernando Valley where highs were between 100 and 108. Surprisingly no records were set yesterday. However, we get another chance for that today as gradients are still trending offshore and 500mb heights are still near 600dam. Most models are indicating another 1-3 degrees of warming today which could push Woodland Hills to 110 and Downtown LA to 95. There is a still a shallow marine layer near the coast which will provide some relief there, and inland temperatures will reach their peak this afternoon before highs drop 2-4 degrees Sunday.
Here's a quick summary of some record highs for today:
Burbank: 105 in 1980 Downtown LA: 99 in 1959 Long Beach: 100 in 1959 LAX: 89 in 1959 Long Beach: 100 in 1959 Palmdale: 110 in 1993 Camarillo: 94 in 1930 Santa Barbara: 87 in 1947 Santa Maria: 89 in 1993 Paso Robles: 112 in 1993
(Tue-Fri), 01/316 AM.
The slow cooling trend will continue through Monday then basically flat lines the rest of next week at roughly 1-5 degrees above normal and minimal day to day temperature variations, placing us squarely in the dog days of summer. If there's any good news in this it's that monsoon moisture is expected to remain out of the area through mid week. Unfortunately there are strong signals for increasing moisture by Thursday and Friday next week with still very strong high pressure aloft, so humidities are likely to be a factor again.
01/0231z.
At 0144Z at KLAX, the marine layer was around 1000 feet deep. The top of the inversion was 2600 feet with a temp of 29 degrees Celsius.
High confidence in VFR conds for KPRB, KBUR, KVNY, KPMD, KWJF.
Low confidence in TAFs for KSBP, KSMX and KSBA. There is a 20-30% chance of low clouds at these sites, and in this case 40% chance of LIFR conds overnight. Any cigs that form may be short- lived.
Low to moderate confidence in KOXR, KCMA and the LA Coastal sites. If low clouds affect these sites, IFR to LIFR conds are likely. The timing could be off by at least +/- 2 hours, and CIGs could form and dissipate at times between around 06Z to 15Z.
KLAX, Low to moderate confidence in the 00Z TAF. The timing of flight cat changes may be off +/- 2 hours from TAF, and lowest cigs may be off +/- 200 feet. No significant east wind component expected.
KBUR, High confidence in the 00Z TAF with VFR conds expected.
31/916 PM.
For the Outer Waters, Small Craft Advisory (SCA) winds and seas will continue through this weekend before beginning to subside early next week. Winds will generally peak at around 30 knots but occasional gusts to 35 knots will be possible, mainly during the evening hours.
For the Inner Waters north of Point Sal, there is an 60-80% chance of SCA winds during the afternoon/evening hours, decreasing to a 30% chance starting Sunday.
For the Inner Waters south of Point Conception, there is a 40% chance of SCA winds each afternoon and evening through this weekend over the western portion of the Santa Barbara Channel.
Seas of 7-10 feet will impact the outer waters into this weekend, due to a combination of long-period southerly swell from a distant tropical cyclone and shorter- period northwesterly swell/wind- waves caused by the moderate to locally strong NW winds. As a result, steep, hazardous seas will be common, especially over the outer waters, extending to nearshore waters off the Central Coast.
31/917 PM.
Distant Tropical Cyclone Genevieve is generating S-SE swells that will continue to affect the beaches into this weekend. A High Surf Advisory remains in effect for the south facing beaches of LA County, with a Beach Hazards Statement for the Ventura Coast northward to the Central Coast. In LA County, in spite of lower wave heights, south facing beaches are still seeing frequent, strong, and hazardous rip currents. For Ventura County (and SBA South Coast) surf heights are low enough and rip currents are mainly moderate. Further north, strong rip currents are likely along the south to southwest facing beaches of the Central Coast.
Use extra caution if you are at the beach, and be sure to ask lifeguards if and where it is safe to swim.
Please reference the Coastal Hazard Message (CFWLOX) for details on High Surf and Beach Hazards Statements. Dangerous rip currents will be of particular concern this weekend.
Ca, Extreme Heat Warning in effect until 8 PM PDT Sunday for zones 38-88-343>345-351>353-355>358-368>376-378-379-381>383-548. (See LAXNPWLOX). High Surf Advisory in effect until 5 PM PDT this afternoon for zones 87-362-366. (See LAXCFWLOX). Beach Hazards Statement in effect through this afternoon for zones 340-346-349-350-354-356. (See LAXCFWLOX). Heat Advisory in effect until 8 PM PDT Sunday for zones 341-342-347>350-354-362-366-367-377-380. (See LAXNPWLOX). PZ, Small Craft Advisory in effect from 3 PM this afternoon to 3 AM PDT Sunday for zone 645. (See LAXMWWLOX). Small Craft Advisory in effect until 5 PM PDT this afternoon for zones 670-673-676. (See LAXMWWLOX).
