30/122 PM.
Much cooler temperatures closer to normal can be expected by Tuesday and continue through Thursday. Gusty onshore winds will affect the area at times, along with chances of light rain Tuesday and Tuesday night. Moderate to strong offshore winds with significant warming and drying will follow Friday through Sunday.
(tdy-Thu), 30/119 PM.
Low clouds persisted at some of the beaches early this afternoon, otherwise partly to mostly cloudy skies covered the forecast area with extensive hi clouds pushing in from the W. These hi clouds will continue to affect the area thru the afternoon and could become quite thick before the end of the day. Onshore gradients will increase with breezy to gusty S to W winds expected this afternoon, strongest in the Antelope Valley where local gusts up to 40 mph will be possible. With the increased onshore flow and partly to mostly cloudy skies, temps will be about 10 to 15 deg or more cooler today than yesterday, but still be 5 to 12 deg above normal for late March. Afternoon highs are expected to range from the upper 60s to mid 70s for coastal areas to the upper 70s to lower 80s for the vlys and lower mtns.
A broad WSW flow aloft will prevail over srn CA thru tonight with gradually lowering H5 heights. For Tue and Tue night, a generally weak upper level trof will move into the area with some moisture and a chance of light rain across the region. As the upper level trof moves E Wed into Thu, H5 heights will increase some with a broad westerly flow aloft.
Plenty of hi clouds will affect the area tonight with low clouds expected along the coast and some vlys, then mostly cloudy skies with that chance of light rain can be expected Tue and Tue night for most areas. Measurable rain will amount to generally 0.10 inch or less for most locations, but locally up to 0.20 inch cannot be ruled out for portions of SLO/SBA Counties.
There could be some lingering showers along the Central Coast Wed into Thu, but for the most part dry conditions are expected across the region both days with mostly clear to partly cloudy skies. Gusty westerly winds are expected to develop Wednesday afternoon, strongest in the deserts, then increasingly gusty W to NW winds should move in for Thu afternoon, strongest on the Central Coast and Antelope Vly.
High temps are expected to fall significantly to 2 to 6 deg below normal for Tue then warm slightly back to near normal for the most part Wed and Thu. Most inland coast and vlys should see highs in the upper 60s to lower 70s Tue and upper 60s to mid 70s Wed and Thu.
(Fri-Mon), 30/121 PM.
Upper level ridging will build into the area from the W Fri thru Sat followed by generally weak upper level troffiness Sun thru Mon.
It looks like northerly to northeast pressure gradients will increase enough for strong and gusty northerly winds to develop over the mtns Fri evening. These winds will likely transition to northeast by Sat morning in the usual wind corridors of VTU/L.A Counties, with this pattern continuing Sat night into Sun morning. Advisory level winds will be possible at this time.
Dry weather can be expected during the extended period. Temps will also turn warmer from near normal on Fri to as much as 8 to 13 deg above normal by Sun. On Sun, the warmest vlys, such as the western San Fernando Vly, could see high temps in the upper 80s to near 90. It should then turn slightly cooler Mon but still remain about 6 to 12 deg above normal across the region.
30/1745z.
At 1712Z over KLAX, the marine layer was 1400 ft deep. The top of the inversion was at 2400 feet with a temperature of 20 C.
Overall, moderate confidence in 18Z TAF Package. Timing of flight cat changes could be off by +/- 2 hours. -SHRA possible at KPRB and KSBP 31/15-18Z.
KLAX, Moderate confidence in TAF. Return of IFR CIGs around 31/02Z (+/- 2 hours). CIGs will gradually lift to MVFR and approach BKN/OVC020 threshold around 31/15Z (+/- 3 hours). No significant east wind component expected.
KBUR, Moderate confidence in TAF.
30/928 AM.
High confidence in winds and seas staying under Small Craft Advisory (SCA) levels through Tuesday. A weak frontal system will move across the coastal waters bringing light showers mainly on Tuesday. A few light showers could linger into Thursday across the northern waters.
Widespread strong SCA winds with a moderate chance of low-end GALES is expected across most of the coastal waters (including nearshore and the Santa Barbara Channel) Wednesday night through Friday morning.
Ca, NONE. PZ, NONE.
