The radar loop is showing some of the heaviest rain and snow I've seen coming into the south coast (Santa Barbara coast). There may be another heavy to excessive rainfall event Friday-Saturday (see link), so could get pretty interesting in the backcountry, almost all of which burned last year and the year before.

There is a section of the John McPhee book "Control of Nature" on debris flows (mainly from 1968??) that is fairly hairraising...

The upper reservoir for Santa Barbara-Goleta (Gibralter Lake) was already essentially full of mud back in the early 90s...could be some rather large slugs of sediment that come into the main reservoir (Cachuma), although a lot of the burn areas are in other drainages.

Chris

ACROSS SAN LUIS OBISPO AND SANTA BARBARA COUNTIES...RAINFALL TOTALS
FROM MONDAY THROUGH THE WEEKEND ARE EXPECTED TO AVERAGE 4 TO 7
INCHES IN COASTAL AND VALLEY AREAS...AND 6 TO 12 INCHES IN THE
FOOTHILLS AND MOUNTAINS. LOCAL TOTALS IN EXCESS OF 15 INCHES ARE
POSSIBLE ALONG SOUTH AND SOUTHWEST FACING MOUNTAIN SLOPES.

• Santa Barbara special weather statement