Ation and Marine discussions,
Areas of light rain and drizzle were present this morning across the coastal basin. Over the past 12 hours, most areas have received 0.01- 0.10 inches of rain, with a few locations on the mountain foothills 0.12 to 0.20 inches. Dry conditions are expected to prevail this afternoon and through the rest of the forecast period.
Marine layer low clouds and fog are expected to be present each night and morning through the forecast period. Areas of low clouds and fog should be present in the eastern valleys tonight into Saturday. The marine layer is expected to become shallower next week, with low clouds and fog only along the coast and into the western valleys at times.
Highs Saturday are expected to be 3 to 5 degrees warmer than today along the coast, 5 to 12 degrees warmer than today in the valleys and deserts, and 12 to 20 degrees warmer than today in the mountains. A few additional degrees of warming is expected from the coast to the deserts on Sunday. For next week, Monday and Tuesday will see a few degrees of cooling along the coast and valleys, with temperatures varying a few degrees each day Wednesday through Friday. There is increasing spread in high temperature guidance for the middle to end of the week, especially for the valleys. For example, the NBM has a 9 to 10 degree spread between the coolest and warmest guidance for high temperatures in Riverside for Wednesday and Thursday.
Cloudy skies will likely clear from west to east today. Drier conditions expected over the weekend and into next week. Night and morning low clouds will be present each day, becoming shallower into early next week. A gradual warming expected through the weekend with minor variations in temperatures each day for next week.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
, Updated Aviation and Marine discussions,
Areas of light rain and drizzle were present this morning across the coastal basin. Over the past 12 hours, most areas have received 0.01- 0.10 inches of rain, with a few locations on the mountain foothills 0.12 to 0.20 inches. Dry conditions are expected to prevail this afternoon and through the rest of the forecast period.
Marine layer low clouds and fog are expected to be present each night and morning through the forecast period. Areas of low clouds and fog should be present in the eastern valleys tonight into Saturday. The marine layer is expected to become shallower next week, with low clouds and fog only along the coast and into the western valleys at times.
Highs Saturday are expected to be 3 to 5 degrees warmer than today along the coast, 5 to 12 degrees warmer than today in the valleys and deserts, and 12 to 20 degrees warmer than today in the mountains. A few additional degrees of warming is expected from the coast to the deserts on Sunday. For next week, Monday and Tuesday will see a few degrees of cooling along the coast and valleys, with temperatures varying a few degrees each day Wednesday through Friday. There is increasing spread in high temperature guidance for the middle to end of the week, especially for the valleys. For example, the NBM has a 9 to 10 degree spread between the coolest and warmest guidance for high temperatures in Riverside for Wednesday and Thursday.
300330z, Coast, SCT-BKN low clouds based around 1500-1800 feet MSL will gradually increase overnight. Scatter out Saturday by 16-17Z. Low clouds based around 1000-1500 feet MSL to gradually develop after 03Z Saturday evening.
Valleys/Mountains, BKN clouds based 4000-5000 feet MSL mainly near foothills will continue to gradually clear overnight. Areas of low clouds based around 2000 feet MSL and very localized vis reductions 4-6SM in western valleys 11-16Z. Otherwise, mostly clear, except for some cumulus around 9000 feet MSL over mountains 19-00Z Saturday.
Deserts, Mostly clear and VFR conditions through Saturday. Westerly wind gusts 25-30 kts east of mountain passes gradually diminishing after 07Z.
Northwest wind gusts will approach 20 kts over outer coastal waters Saturday afternoon and evening. Otherwise, no hazardous marine conditions are expected through Tuesday.
Ca, None. PZ, None.
