02/1205 AM.
Today will be the hottest day of the week. Still, above normal temperatures are expected well into next week. Dense fog will affect some coastal areas.
(tdy-Tue), 02/305 AM.
Cooling will arrive today and will continue through Tuesday. Ydy's 597 dam hgts will slowly fall to 594 dam today. More importantly there will be about 2 mb increase in onshore flow both to the north and the east. This will 2 to 4 degrees of cooling to most areas. Max temps, however, will remain 5 to 10 degrees above normal. This and the above normal overnight lows will continue the heat danger and all of the heat advisories and warning will continue through this evening.
Above average 594 dam hgts will continue Monday and Tuesday but the onshore flow will increase a little more each day and this will bring a few more degrees of cooling each day. Today's vly temps of
The cooling may not be enough to get some of the interior sections that are under a heat warning down under advisory criteria and there is a 50 percent chc that heat advisories will be needed for several interior locations Monday, Tuesday and possibly Wednesday.
The increase in onshore flow will bring more and more low clouds to the coasts each morning, but the high pressure aloft will keep the marine layer smooshed enough to keep the low clouds out of the vlys.
(Wed-Sat), 02/305 AM.
Not much action in the xtnd fcst. High pressure remains over the state through the period. Hgts remain near 594 dam Wednesday, but then start to slowly climb as the upper high strengthens. Hgts will be near 598 dam again by Friday or Saturday. Mdt-stg onshore flow both to the N and E will limit the warming across the csts and some lower vlys and will likely bring some clouds each morning to some of the beaches. Further inland, however, max temps will rise some starting Thursday. The official blended fcst calls for vly highs of 90 to 100 for the vlys on Fri/Sat, but these temp may be a little low and may need adjusting over the next few days.
SE flow also develops Thu or Fri and this could lead to some monsoon transport. Nothing is really indicated at this time, but that can easily change given this flow direction.
02/1138z.
At 0822Z at KLAX, the marine layer was 1200 ft deep. The top of the inversion was near 5300 feet with a temp of 28 degrees Celsius.
High confidence in VFR conds for KPRB, KBUR, KVNY, KPMD and KWJF.
Moderate confidence in the rest of the TAFs where VFR timing could be off by +/- 1 to 2 hours and cigs hgt off by +/- 200 ft.
KLAX, Moderate confidence in TAF. There is a 30 percent chc that cigs will dip to BKN004. Good confidence that VFR conds will arrive between 1630Z and 1730Z. No significant east wind component expected.
KBUR, High confidence in CAVU TAF.
02/155 AM.
For the western portion of the Santa Barbara Channel and the inner waters north of Point Sal, there is a 30-40% chance of SCA winds during this afternoon and evening hours. Otherwise conditions are expected to remain below SCA levels.
For the Outer Waters, Small Craft Advisory (SCA) winds and seas will continue through tonight before beginning to subside early this coming week. Winds will generally peak at around 30 knots, strongest during the evening hours.
Seas of 7-10 feet will impact the outer waters through today, due to a combination of long-period southerly swell from a distant tropical cyclone and shorter- period northwesterly swell/wind- waves caused by the prevalent NW winds. As a result, steep, hazardous seas will be common, especially over the outer waters, extending to nearshore waters off the Central Coast. Seas will begin to subside as the winds weaken late tonight into early next week.
Dense fog will affect some of the coastal waters each night and morning going forward.
02/155 AM.
The surf will diminish further today, but moderate to locally strong rip currents will still be common on exposed south to southwest facing beaches.
Continue to use extra caution if you are at the beach, and be sure to ask lifeguards if and where it is safe to swim.
Ca, Extreme Heat Warning in effect until 8 PM PDT this evening for zones 38-88-343>345-351>353-356>358-368>376-378-379-381>383-548. (See LAXNPWLOX). Heat Advisory in effect until 8 PM PDT this evening for zones 342-348>350-354-355-362-366-367-377-380. (See LAXNPWLOX). PZ, Small Craft Advisory in effect until 3 AM PDT Monday for zones 670-673-676. (See LAXMWWLOX).
