Mount Baldy, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

413
FXUS66 KSGX 041801
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
1101 AM PDT Mon May 4 2026

.SYNOPSIS...
A low pressure system off the central California coast will move
slowly inland through central and southern California through
Tuesday spreading cooling inland with high temperatures on
Tuesday 10 to 15 degrees below average for inland areas and 15 to
20 degrees below average for the mountains. Southwest to west
winds for the mountains and deserts will gust to 35 to 45 mph with
isolated gusts to 60 mph. There is a also chance of showers
through Tuesday. The greater chances for showers are for late this
evening through Tuesday morning and across San Diego County from
the coast to the mountains. It will be dry with a substantial
warming trend for Wednesday through Monday of next week. High
temperatures on Sunday will be 10 to 15 degrees above average for
inland areas to as much as 15 to 20 degrees above average for the
inland valleys and lower coastal slopes of the mountains. There
could be extreme heat in the lower deserts as early as Saturday
and continuing through at least Monday of next week.

&&

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

New Aviation and Marine Discussion...

.SHORT TERM (Today through Wednesday)...
A low pressure system off the central California coast will move
slowly inland through central and southern California through
Tuesday spreading cooling inland with high temperatures on
Tuesday 10 to 15 degrees below average for inland areas and 15 to
20 degrees below average for the mountains. Southwest to west
winds for the mountains and deserts will gust to 35 to 45 mph with
isolated gusts to 60 mph.

There is a slight chance of showers through today from the coast
to the mountains. The greater chances for showers are for late
this evening through Tuesday morning and across San Diego County
from the coast to the mountains. Through Tuesday, rainfall across
Orange, southwestern San Bernardino, and western Riverside
Counties, rainfall could range from less than one-tenth inch near
the coast to one-tenth to locally one-quarter inch in the
mountains. For San Diego County, rainfall could range from one-
tenth inch near the coast to one-tenth to locally one-third inch
in the mountains.

Wednesday will be dry with a substantial warming trend through
early next week. High temperatures on Wednesday will warm as much
as 12 to 18 degree for the mountains and high desert, but with
high temperatures still a few degrees below average for most
areas. High temperatures on Wednesday will range from the mid to
upper 60s near the coast to the 70s for the Inland Empire with the
lower deserts in the upper 80s to around 90.

&&

.LONG TERM (Thursday through Sunday)...
Substantial warming will continue on Thursday with the warming
slowing for Friday through Monday. With the warming, high
temperatures for Monday of next week will be as much as 15 to 20
degrees above average for some inland areas. High temperatures for
next Monday will range from the 70s near the coast to the 90s to
around 100 for the Inland Empire with 105 to 110 for the lower
deserts. The Heat Risk based on the NBM forecast would be
sufficient for an Extreme Heat Warning for the lower deserts
beginning on Saturday and continuing through at least Monday of
next week. The Heat Risk for the inland valleys could be
sufficient for a Heat Advisory beginning on Monday.


&&

.AVIATION...
041800Z....Coast/Valleys...Low clouds based between 3000-6000ft MSL
will continue through the late afternoon/evening. Could see the
occasional cigs 2000-2500ft MSL in DZ or -SHRA, with chances
increasing after 04-06Z Tuesday.

.Mountains/Deserts...Strong westerly gusts up to 25-35 kts with
isolated gusts of 45 kts are expected after 19-21z. This will create
moderate to strong up/down drafts and local LLWS in the lee of
mountains. Expect reduced vis in BLDU in deserts areas. Coast-facing
mountain slopes will occasionally be obscured between 3000-6000 feet
MSL in BR where clouds intersect terrain. Chances will increase
after 02-04Z Tuesday.

&&

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

&&

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


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Wind Advisory until 9 PM PDT this evening for Apple and Lucerne
     Valleys-San Gorgonio Pass near Banning.

PZ...None.

&&

$$

PUBLIC...Martin
AVIATION/MARINE...Villafane