After a cold start today, temperatures will trend upwards each day through Monday. Fair, dry, and warm weather likely persists through next week. Daytime high temperatures go above seasonal averages tomorrow and increase from there.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
, New Aviation Discussion for the 18z TAF Package,
Clear and chilly this morning with many locations in the inland valleys and coastal areas reporting minimum temperatures in the 30s. Increasing high clouds from the southwest will inhibit radiation cooling tonight so the low temps tomorrow morning will likely not be as low as this morning. Surface pressure gradients have turned offshore and locally gusty northeast to east winds have developed in the mtn passes and along the foothills. Gusts of 25-30 mph have been reported in the last hour, with a couple of locations reporting gusts of 40+ mph. Offshore flow will peak this morning with the wind-prone locations gusting up to 40 mph at times. Offshore flow will gradually weaken through Sunday before turning weakly onshore Monday afternoon.
A warming trend begins today as a high pressure ridge builds over the western US. This ridge will dominate our weather pattern through next week, bringing fair and warm weather. Temperatures will trend upward through Monday then fluctuate from day to day peaking again next Friday. On Monday, temperatures will reach the low 80s in the inland valleys and lower deserts, anywhere from 8 to 15 degrees above seasonal averages. All other areas will also be warmer than normal. Next Friday, temperatures will be in the mid to upper 80s west of the mtns and in the low 90s in the lower deserts, 12 to 18 degrees above seasonal averages.
Timing the return of marine layer clouds/fog in the coastal areas is uncertain at best but it seems unlikely that they will return before Tuesday. Some models indicate a return of the marine layer clouds/fog for next Wednesday as a shortwave trough passes to the north and weakens the ridge but confidence in this outcome remains low.
211830z, VFR and sunny skies today with increasing FEW-SCT AOA 25,000ft MSL through the afternoon and into Sunday morning.
No marine hazards are expected through Thursday morning.
Ca, None. PZ, None.
