19/707 PM.
Temperatures will remain well above normal through next week, though some cooling is expected Friday through this weekend. Areas of dense coastal fog will be possible through the weekend as well. Temperatures will trend upward again next week but are not expected to be as hot as this week.
(Thu-Sun), 19/747 PM.
***UPDATE***
Under the continuing heat wave, high temperatures today were a mix of 2 to 6 degrees warmer in some of the valley and coastal areas, but also 5 to 10 degrees cooler in others. The most notable cooling trends were along the Santa Barbara portion of the Central Coast and in the interior of Santa Barbara and San Luis Obispo Counties. The Oxnard Plain and eastern SBA South Coast also cooled a few degrees. However, many high temperature records were set, including an all time high record in Woodland Hills with 102 degrees.
Friday will see continued heat, but mainly in the valleys and interior areas. Coastal areas will see 2 to 5 degrees of cooling. The day is likely to start out cooler with a potential return of the marine layer tonight, and some patchy low clouds and dense fog near the beaches late tonight into Friday morning. The most likely area to get the low clouds will be along the L.A. coastal areas. There are decreasing chances of low clouds affecting coastal areas from Oxnard northward to Santa Barbara and the Santa Maria Valley.
Light east to northeast flow is expected tonight into Friday morning, with a shift to mainly weak to locally gusty onshore winds in the afternoon. Friday night into Saturday should see more extensive coverage along the coast, aided by the shift to onshore flow.
***From Previous Discussion***
In general temperatures today are either the same or a few degrees cooler than yesterday. Expecting one more day of similar temperatures before the current high pressure system starts shifting into AZ which will initiate a brief cooling trend over the weekend. Most areas except the far interior will experience 5-10 degrees of cooling this weekend, though that still keeps highs 10-20 degrees above normal. A shallow marine layer has begun to form over the coastal waters and many beaches will start out with dense fog the next few days and that will help cool off the coastal areas.
In the meantime, it continues to be very hot with temperatures 20-30 degrees above normal Heat Advisories and Extreme Heat Warnings remain in effect through Friday. Based on the current forecast, there is only about a 30% chance of extending heat advisories into Saturday, and those would most likely be in the inland areas.
(Mon-Thu), 19/215 PM.
Temperatures will slowly start to increase across inland areas Sunday and for coastal areas on Monday. Not expecting temperatures to be as hot as this week, but still 15-20 degrees above normal, with a less than 5% chance of reaching 100 in the valleys.
Additional rain possibilities still look very bleak through the end of the month. Some models indicate some very light rain in early April but amounts are mostly under a tenth of an inch.
19/2305z.
At 2212Z at KLAX, the marine layer was 400 ft deep. The top of the inversion was at 1700 ft with a temperature of 30 C.
High confidence for desert and valley TAF sites. Low confidence for coastal sites south of Point Conception: KSBA, KOXR, KCMA, KSMO, KLAX, & KLGB.
Chance V/LIFR CIGs arrive: KSBA (30%) , KOXR (50%), KCMA (30%), KSMO (40%), KLAX (50-60%), and KLGB (60%).
Timing of CIG/VSBY restrictions may be off +/- 3 hours, and flight minimums off by one category.
KLAX, Low confidence in TAF. There is a 50-60% chance LIFR CIGs arrive. Timing of arrival and clearing could be off by 2 hours if forecast materializes.
KBUR, High confidence in VFR TAF.
19/707 PM.
Conditions are likely to remain below Small Craft Advisory (SCA) levels through Friday night or Saturday morning. SCA conditions are likely to develop Saturday afternoon through Sunday across the outer waters and the nearshore waters along the Central Coast. Seas will reach 8-12 feet, and there is a low (20-30 percent) chance of GALE FORCE winds, highest from around Point Arguello south to the Channel Islands Saturday night and Sunday. Winds are expected to gradually subside Sunday night through Monday.
Areas of dense fog are likely to be widespread tonight into Friday morning.
Ca, Heat Advisory remains in effect until 8 PM PDT Friday for zones 38-87-340-341-343-344-346>350-354-355-362-366-367-549-550. (See LAXNPWLOX). Heat Advisory in effect until 8 PM PDT Friday for zones 38-87-343-344. (See LAXNPWLOX). Extreme Heat Warning in effect until 8 PM PDT Friday for zones 88-342-345-351>353-356>358-368>376-378>380-548. (See LAXNPWLOX). PZ, NONE.
