Alpine, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

562
FXUS66 KSGX 141200
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
500 AM PDT Sun Jun 14 2026

.SYNOPSIS...
High temperatures into early next week will generally range from
a few degrees above average near the coast to 5 to 10 degrees above
average for the mountains and deserts with some minor day-to-day
differences. Minor to moderate HeatRisk, heat-related impacts
affecting those sensitive to heat, will continue for the inland
valleys and deserts through next Wednesday. Marine layer low
clouds will spread into portions of the western valleys during the
nights and early mornings, with day-to-day variations. A cooling
trend with a deepening marine layer will follow mid to late next
week.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

...Updated Aviation Discussion Below...

.SHORT TERM...Today through Tue June 16...
The sounding from this afternoon shows plenty of mid-level
moisture still in our atmosphere, brought by southwesterly flow
aloft around a mid-level high pressure over northwest Mexico.
Similar to last night, this is leading to a rather patchy and
intermittent marine layer. Like this morning, these clouds will
have cleared from land areas and only be lingering along parts of
the immediate coast by mid-morning today.

After another warmer-than-average morning, also due to mid-level
moisture preventing efficient radiational cooling, afternoon
temperatures today will be a tad cooler than yesterday, with the
exception of the deserts and parts of the eastern Inland Empire.
After today, while the immediate coast will continue to cool
slightly or experience similar temperatures, inland areas will
warm slightly Monday-Tuesday. This will be more noticeable for
weather stations than for the average person, though, with
temperatures continuing to be anywhere from a few to 10 degrees
above average through Tuesday. Things will also continue to feel a
bit more humid than what we`re typically used to this time of
year.

Nightly and morning low clouds will continue to impact the coastal
regions each day through this period, though some amount of
lingering mid- level moisture will make clouds patchy in coverage
to some each extent each night, especially earlier in the
evening.

&&

.LONG TERM...Wed June 17 to Sun June 21...

Conditions will start to cool off as low pressure to our southwest
sneaks under the Pacific High. This trend will become more
apparent towards the end of the week as a broader, stronger trough
moves into the region from the west Friday into the weekend. This
will reduce temperatures to near average for mid next week, then
slightly below for the end of the week, with high temperatures a
few to perhaps 10 degrees below average for Saturday/Sunday. This
will also deepen the marine layer, leading to more widespread low
clouds getting further inland overnight into the mornings and
likely lingering longer in the mornings and arriving earlier in
the evenings some days late week.

&&

.AVIATION...
141130Z...Coast/Western Valleys...Low clouds with bases 800-1200 ft
MSL will intermittently be BKN-OVC along the coastline of Orange and
San Diego counties and up to around 5-10 miles inland through 15Z.
VIS 0-5SM in valleys east of I-15 in SD County and elevated coastal
terrain where cigs reach. Scatter to beaches 15-18z Sun, then VFR
conditions prevail through Sunday afternoon. Low clouds with similar
bases are expected to develop in patchy fashion over coastal areas
after 02z Mon, starting in SD County, and will continue to slowly
fill in with similar bases, especially after 05Z Mon.

Mountains/Deserts...VFR conditions are expected through Sunday
evening with high clouds AOA 10 kft MSL. Gusty onshore winds through
desert slopes and San Gorgonio Pass into the Coachella Valley
bringing gusts 20-25 kts this afternoon, after 00z Mon. These winds
will begin to gradually weaken beginning around 06-09Z Mon.

&&

.MARINE...
No hazardous marine conditions are expected through Wednesday.

&&

.SKYWARN...
Skywarn activation is not requested. However weather spotters are
encouraged to report significant weather conditions.


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement through Friday evening for Orange County
     Coastal Areas-San Diego County Coastal Areas.

PZ...Beach Hazards Statement through Friday evening for Coastal
     Waters from San Mateo Point to the Mexican Border and out
     to 10 nm.


&&

$$

PUBLIC...CSP
AVIATION/MARINE...Stewey