Another beautiful day...

(Pt. Loma viewed from Coronado)

An upper level low pressure system will deepen over the western states on Tuesday... resulting in much cooler temperatures and widespread low clouds and fog across the coastal plain and most valley locations.

The marine layer is expected to be even more widespread and more dense Tuesday night and Wednesday morning. There's also the possibility of drizzle.

Meanwhile... due to tight pressure gradients... gusty winds will blow over the northern mountains and deserts through Tuesday evening. At times gusts to around 45 mph are possible. This will affect driving conditions along the 5 FWY through the Grapevine, the 14 FWY through Soledad canyon north into the Antelope Valley... and the 15 FWY from the 15/215 Split north into the high deserts.

A weak offshore flow will develop Wednesday night and Thursday with local easterly winds over the mountains and some valley locations. This flow will be responsible for fair skies and mild temperatures.

Another trough is due in by the end of the weekend returning the gloomy weather to the southland.

# posted by SoCal WXMan @ 4:18 AM