Showers and winds will diminish overnight. Patchy frost and fog likely in the Inland Empire late early Friday morning. Fair, dry and warmer weather is expected over the weekend, and will likely persist through much of next week.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
.Evening Update,
The main frontal band has moved through the region this evening. This brought a line of heavier rain for the coasts and valleys. Big winners closer to the coast include National City with 0.75" of rain and Point Loma & Santee just above 0.50". Winds have been gusting near 40-55 MPH across parts of the mountains and desert slopes this evening. These winds will continue to weaken into the early morning hours. The trough overhead will continue to push eastward where showers will become more isolated overnight into early Friday morning.
Post-frontal clouds will bring intervals of sunshine west of the mountains with better chances for Sun across the deserts. A chilly night is in store for the region, where there is a 50-50 chance for the Big Bear Lake region to dip to 10 degrees tonight. Confidence is moderate to see areas of IE and inland San Diego valleys dip below freezing tonight as well by Saturday morning. Rain/snow lovers, we hope you enjoyed. If you're ready to get back to the sunshine and warmer weather, this weekend is just for you!
.Previous Discussion (145 PM Thursday),
As skies begin to clear late tonight, cold air pooling could produce some frost in portions of the inland valleys and coastal areas early Friday morning.
Fair and dry, but cool weather starts Friday, with some variable high clouds. Weak offshore flow over the weekend will boost the drying and warming trend as high pressure aloft amplifies a little. Temperatures in the 60s Saturday will be followed by lots of 70s Sunday at lower elevations. A weak and stationary ridge appears to be taking shape over California next week. Current guidance shows that high pressure aloft is likely to control our weather through the middle of next week. This could allow a return of marine layer coastal low clouds during the nights and mornings. Monday and Tuesday will likely be the warmest days, with temps in the upper 70s at low elevations west of the mtns and in the low to mid 80s in the lower deserts. Some ensemble members are indicating chances for precipitation next Wednesday but the majority remain dry.
200430z, SCT -SHRA may create brief MVFR conditions in San Diego County through 09Z. FG and SCT -SHSN will intermittently reduce vis to 0-2SM in the mtns (mainly above 5 kft MSL) through early Friday morning. West to northwest winds gusting 20-25 kts through the coastal basin will continue to slowly weaken this evening. Otherwise, VFR conditions expected through Friday evening.
Winds will remain strong through 12-15Z Fri for east facing mtn slopes and locally into the deserts in Riverside/San Diego Counties. Gusts reaching 35-50 kts along desert slopes and through mtn passes. Moderate up/downdrafts in the lee of mtns.
West to northwest winds will remain elevated into the early morning with occasional gusts 20 to 25 kts, creating steep seas 7 to 9 feet. Winds slowly weaken overnight into early Friday. Steep seas will subside by late Friday morning.
High surf of 4 to 7 feet is expected with sets as high as 8 feet with the highest surf expected for San Diego County. Surf will diminish by Friday afternoon. Dangerous swimming and surfing conditions and localized beach erosion can be expected until then. A High Surf Advisory is in effect through Friday and contains more details.
Ca, High Surf Advisory until 10 PM PST Friday for Orange County Coastal Areas-San Diego County Coastal Areas.
Wind Advisory until 2 AM PST Friday for Orange County Coastal Areas-Orange County Inland Areas-San Bernardino and Riverside County Valleys-The Inland Empire-San Diego County Coastal Areas-San Diego County Valleys-Santa Ana Mountains and Foothills.
Winter Storm Warning until 9 AM PST Friday for Riverside County Mountains-San Bernardino County Mountains.
Winter Weather Advisory until 9 AM PST Friday for San Diego County Mountains.
Wind Advisory until 9 AM PST Friday for Apple and Lucerne Valleys-Coachella Valley-San Diego County Deserts-San Gorgonio Pass near Banning.
PZ, Small Craft Advisory until 10 AM PST Friday for Coastal Waters from San Mateo Point to the Mexican Border and out to 10 nm- Waters from San Mateo Point to the Mexican Border Extending 10 to 60 nm out including San Clemente Island.
