Area Forecast Discussion
Issued by NWS San Diego, CA
FXUS66 KSGX 270423
AREA FORECAST DISCUSSION
National Weather Service San Diego CA
923 PM PDT TUE JUL 26 2016
Seasonally warm to hot, and dry through Thursday. Slightly cooler
over the weekend as moisture in monsoonal flow from the southeast
brings more clouds and a chance of showers and thunderstorms, mainly
in the mountains and deserts. The cooler conditions should persist
into next week as a weak trough develops along the West Coast.
.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
The cumulus clouds that boiled up over the mountains today rapidly
dissipated by early evening leaving clear skies, except for some
marine stratus clouds over the outer coastal waters. the 00Z Miramar
sounding showed warming and drying in the mid-levels with a brisk
easterly wind. This no doubt, worked against those cumulus clouds
building into thunderstorms this afternoon, although one did manage
to develop over the San Bernardino Mountains briefly.
The Subtropical High will remain over the SW through Fri, then
weaken and shift back to the east, opening the door for some
monsoonal moisture to increase over Socal. It looks like we could
get several days of scattered shwr/tstm activity from around Fri
into early next week as we remain near the edge of the deeper
Temperatures will continue to run from 3 to 8 degrees F above
average through about Fri, then gradual cooling into early next
week with a slightly deeper marine layer.
270300Z...Patchy low clouds will slowly gather along the coast
overnight most likely at KSAN and KCRQ after 07Z and less likely at
KSNA. Low confidence in timing. Bases will be around 900 feet msl
with tops to 1400 feet. Some vis restrictions of 3-5sm possible.
Scatter out Wednesday expected by 15Z. Otherwise, mostly clear skies
with some cumulus over mountains Wednesday afternoon.
No hazardous marine weather is expected through Sunday.
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.