Ation DISCUSSION,
The overall pattern will remain troughy through Friday, with another shortwave expected to move through the mean flow tomorrow. This will increase the onshore pressure gradient, maintaining a deeper marine layer, elevating winds, and maintaining below average temperatures. Additionally, patchy drizzle is possible tonight into Tuesday morning. Peak winds for the mountains, deserts, and passes this afternoon into Tuesday morning will be 35 to 50 mph. Gusts up to 60 mph possible through San Gorgonio Pass.
Conditions will gradually warm each day through the holiday weekend, but highs through Wednesday for inland areas will be 10 to 20 degrees below average. For the 4th of July there is more confidence in weak ridging developing over the US West Coast, with more uncertainty in the strength and placement of the ridge into early next week. Even with ridging aloft this weekend, highs in and west of the mountains will be 1 to 5 degrees below average, with highs in the deserts up to 3 degrees above average.
The marine layer will stay deep through mid-week becoming shallower and more confined to the coast and western valleys for Friday into early next week.
Increased winds over the mountains and deserts this afternoon into Tuesday morning. A deep marine layer and well below average conditions will prevail through the middle of the week. A gradual warming is expected into the 4th of July holiday weekend, with conditions warming to near or slightly above normal by early next week.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
, UPDATED AVIATION DISCUSSION,
The overall pattern will remain troughy through Friday, with another shortwave expected to move through the mean flow tomorrow. This will increase the onshore pressure gradient, maintaining a deeper marine layer, elevating winds, and maintaining below average temperatures. Additionally, patchy drizzle is possible tonight into Tuesday morning. Peak winds for the mountains, deserts, and passes this afternoon into Tuesday morning will be 35 to 50 mph. Gusts up to 60 mph possible through San Gorgonio Pass.
Conditions will gradually warm each day through the holiday weekend, but highs through Wednesday for inland areas will be 10 to 20 degrees below average. For the 4th of July there is more confidence in weak ridging developing over the US West Coast, with more uncertainty in the strength and placement of the ridge into early next week. Even with ridging aloft this weekend, highs in and west of the mountains will be 1 to 5 degrees below average, with highs in the deserts up to 3 degrees above average.
The marine layer will stay deep through mid-week becoming shallower and more confined to the coast and western valleys for Friday into early next week.
300515z. Coast/Valleys/Foothills, Low clouds with bases 2000-3000 ft MSL and tops to 3500 ft MSL will continue to fill in across the coastal basin through 09Z. 10-20% chance of patchy drizzle 09-18Z, with the greatest chances near the coast. Clouds scatter out 16-19Z Tuesday. Low clouds will redevelop at the coastal areas 23-04Z with bases/tops around 1800-2500 ft MSL, spreading into the inland valleys again Tuesday night.
.Mountains/Deserts, Southwest to west winds with surface gusts 20-40 kts with local gusts to 50 kts through the passes. Winds slowly weaken 08-12Z, then strengthen again around 22-00Z. Gusts around 20-35 kt, locally to 45 kt in the passes Tuesday afternoon into Tuesday night. MOD- STG up/downdrafts and pockets of LLWS over and east of the mountains.
No hazardous marine conditions are expected through Saturday.
Ca, None. PZ, None.
