Well above average temperatures will continue through the weekend. Low clouds with areas of dense fog along the coast tonight into Saturday morning, with low clouds and fog less likely late in the weekend and early next week due to widespread high cloud coverage. Cooler, windier, and potentially wetter conditions possible for the middle of next week.
For extreme southwestern California including Orange, San Diego, western Riverside and southwestern San Bernardino counties,
Highs today are on track to be a few degrees warmer than yesterday for most inland locations, with continued warming for the coast and valleys into Saturday. The heat will continue to be record breaking for this time of year, with additional inland locations again forecast to break or tie temperature records through Sunday. The list of locations that broke or tied their daily high or low temperature records yesterday is on our weather.gov/sandiego homepage. High temperatures will be 10 to 25 degrees above average across the area through Sunday.
Marine layer low clouds will be present tonight into Saturday. Areas of dense fog are possible along the coast and over the coastal waters. Chances of dense fog decrease for the latter half of the weekend into early next week.
A pattern change is expected next week as an area of low pressure approaches the US West Coast. Cooler, cloudier, and windier conditions are expected for the middle of the week. There remains some uncertainty in the timing of the low's passage, with most solutions showing the low passing sometime Wednesday or Thursday. By Friday about 50 percent of solutions keep the West Coast under the low's influence. The latest forecast has the coolest and windiest conditions Wednesday and Thursday.
The track of the low continues to trend north of Southern California, which continues to limit how much precipitation will fall. Additionally if the track continues to trend north, chances of rain for San Diego county will become more limited. There are still some solutions showing the potential for at least light precipitation as early as Tuesday night continuing through as late as Friday. Current forecast has the highest chances (15-25 percent) of rain Tuesday night into Wednesday. With the more northerly track, forecast rainfall amounts have decreased. Nbm chances of rainfall totals reaching or exceeding 0.10" are 30 to 40 percent for the coastal slopes of the mountains and portions of the Inland Empire and Orange County. Elsewhere west of the mountains chances are 20 to 30 percent with 15 percent or less chance in the deserts. Whenever the trough decides to progress eastward later in the week (Thu-Fri), warmer and drier weather will follow with highs returning to slightly above normal.
271740z, Low clouds have cleared the coast, returning late this evening around 06Z-07Z Saturday. Bases will be slightly lower and patchy in nature with intermittent heights around 100-700ft MSL and reduced vis 0-5SM. Lower visibilities will be located on higher coastal terrain. Low clouds and visibilities will begin clearing inland to the coast after 16Z-18Z Saturday.
Otherwise, mostly clear skies and VFR conditions through the TAF period.
No hazardous marine conditions expected through Wednesday.
Ca, None. PZ, None.
