High Wind Warning 2, NWS San Diego, CA

196 
WWUS76 KSGX 192027
NPWSGX

URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
1227 PM PST Sun Jan 19 2025

CAZ050-056-058-200630-
/O.UPG.KSGX.HW.A.0002.250121T1200Z-250122T0400Z/
/O.EXB.KSGX.HW.W.0002.250121T1200Z-250122T0400Z/
San Diego County Valleys-Riverside County Mountains-San Diego
County Mountains-
Including the cities of Poway, Santee, El Cajon, La Mesa, Pine
Valley, San Marcos, Julian, Escondido, and Idyllwild-Pine Cove
1227 PM PST Sun Jan 19 2025

...HIGH WIND WARNING IN EFFECT FROM 4 AM TO 8 PM PST TUESDAY...

* WHAT...Northeast and east winds 25 to 35 mph with gusts up to 60 
  mph possible. Isolated gusts over 75 mph on the favored coastal 
  slopes of the San Diego County Mountains.

* WHERE...Riverside County Mountains, San Diego County Mountains, 
  and San Diego County Valleys. Highest across mountains and 
  foothills.

* WHEN...From 4 AM to 8 PM PST Tuesday.

* IMPACTS...Damaging winds could blow down trees and power lines. 
  Power outages are possible. Travel will be difficult, especially 
  for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain in the lower levels of your home during the windstorm, and 
avoid windows. Watch for falling debris and tree limbs. Use caution 
if you must drive.

&&

$$

CAZ048-055-057-065-200630-
/O.CON.KSGX.HW.W.0002.250121T0400Z-250122T0400Z/
San Bernardino and Riverside County Valleys-The Inland Empire-San
Bernardino County Mountains-Santa Ana Mountains and Foothills-San
Gorgonio Pass Near Banning-
Including the cities of Moreno Valley, Big Bear City, Crestline,
Riverside, San Bernardino, Fontana, Big Bear Lake, Desert Hot
Springs, Banning, Lake Arrowhead, Running Springs, Rancho
Cucamonga, Wrightwood, Ontario, and Corona
1227 PM PST Sun Jan 19 2025

...HIGH WIND WARNING REMAINS IN EFFECT FROM 8 PM MONDAY TO 8 PM PST 
TUESDAY...

* WHAT...Northeast winds 25 to 40 mph with gusts up to 60 mph 
  possible. Isolated gusts to 75 mph on the favored coastal slopes 
  and canyons in the San Bernardino and Santa Ana Mountains.

* WHERE...San Bernardino County Mountains, San Bernardino and 
  Riverside County Valleys-The Inland Empire, San Gorgonio Pass Near 
  Banning, and Santa Ana Mountains and Foothills.

* WHEN...From 8 PM Monday to 8 PM PST Tuesday.

* IMPACTS...Damaging winds could blow down trees and power lines. 
  Travel could be difficult, especially for high profile vehicles. 
  Damage to unsecured outdoor objects.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain in the lower levels of your home during the windstorm, and 
avoid windows. Watch for falling debris and tree limbs. Use caution 
if you must drive.

&&

$$

APR

675 
WWUS76 KSGX 200543
NPWSGX

URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
943 PM PST Sun Jan 19 2025

CAZ048-055-057-065-201415-
/O.CON.KSGX.HW.W.0002.250121T0400Z-250122T0400Z/
San Bernardino and Riverside County Valleys-The Inland Empire-San
Bernardino County Mountains-Santa Ana Mountains and Foothills-San
Gorgonio Pass Near Banning-
Including the cities of Corona, Wrightwood, Desert Hot Springs,
Big Bear City, Rancho Cucamonga, Crestline, Moreno Valley,
Running Springs, Fontana, Big Bear Lake, Banning, Ontario,
Riverside, San Bernardino, and Lake Arrowhead
943 PM PST Sun Jan 19 2025

...HIGH WIND WARNING REMAINS IN EFFECT FROM 8 PM MONDAY TO 8 PM PST 
TUESDAY...

* WHAT...Northeast winds 25 to 40 mph with gusts up to 60 mph. 
  Isolated gusts in excess of 75 mph on the favored coastal slopes 
  and canyons in the San Bernardino and Santa Ana Mountains Monday 
  night into Tuesday morning.

* WHERE...San Bernardino County Mountains, San Bernardino and 
  Riverside County Valleys-The Inland Empire, San Gorgonio Pass Near 
  Banning, and Santa Ana Mountains and Foothills.

* WHEN...From 8 PM Monday to 8 PM PST Tuesday.

* IMPACTS...Damaging winds could blow down trees and power lines. 
  Travel could be difficult, especially for high profile vehicles. 
  Damage to unsecured outdoor objects.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain in the lower levels of your home during the windstorm, and 
avoid windows. Watch for falling debris and tree limbs. Use caution 
if you must drive.

&&

$$

CAZ050-056-058-201415-
/O.CON.KSGX.HW.W.0002.250121T1200Z-250122T0400Z/
San Diego County Valleys-Riverside County Mountains-San Diego
County Mountains-
Including the cities of El Cajon, Julian, Idyllwild-Pine Cove,
Santee, Escondido, Pine Valley, Poway, La Mesa, and San Marcos
943 PM PST Sun Jan 19 2025

...HIGH WIND WARNING REMAINS IN EFFECT FROM 4 AM TO 8 PM PST 
TUESDAY...

* WHAT...Northeast and east winds 25 to 35 mph with gusts up to 60 
  mph possible. Isolated gusts in excess of 75 mph on the favored 
  coastal slopes of the San Diego County Mountains Monday night into 
  Tuesday morning.

* WHERE...Riverside County Mountains, San Diego County Mountains, 
  and San Diego County Valleys.

* WHEN...From 4 AM to 8 PM PST Tuesday.

* IMPACTS...Damaging winds could blow down trees and power lines. 
  Power outages are possible. Travel will be difficult, especially 
  for high profile vehicles. Damage to unsecured outdoor objects.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain in the lower levels of your home during the windstorm, and 
avoid windows. Watch for falling debris and tree limbs. Use caution 
if you must drive.

&&

$$

SS

068 
WWUS76 KSGX 201142
NPWSGX

URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
342 AM PST Mon Jan 20 2025

CAZ048-055-057-065-202215-
/O.CON.KSGX.HW.W.0002.250121T0400Z-250122T0400Z/
San Bernardino and Riverside County Valleys-The Inland Empire-San
Bernardino County Mountains-Santa Ana Mountains and Foothills-San
Gorgonio Pass Near Banning-
Including the cities of Big Bear Lake, Riverside, Lake Arrowhead,
Ontario, Banning, Rancho Cucamonga, Moreno Valley, San
Bernardino, Big Bear City, Wrightwood, Desert Hot Springs,
Crestline, Corona, Fontana, and Running Springs
342 AM PST Mon Jan 20 2025

...HIGH WIND WARNING REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 8 
PM PST TUESDAY...

* WHAT...Northeast winds 25 to 40 mph with gusts up to 60 mph. 
  Isolated gusts in excess of 75 mph on the favored coastal slopes 
  and canyons in the San Bernardino and Santa Ana Mountains Monday 
  night into Tuesday morning.

* WHERE...San Bernardino County Mountains, San Bernardino and 
  Riverside County Valleys-The Inland Empire, San Gorgonio Pass Near 
  Banning, and Santa Ana Mountains and Foothills.

* WHEN...From 8 PM this evening to 8 PM PST Tuesday.

* IMPACTS...Damaging winds could blow down trees and power lines. 
  Power outages are possible. Travel will be difficult, especially 
  for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain in the lower levels of your home during the windstorm, and 
avoid windows. Watch for falling debris and tree limbs. Use caution 
if you must drive.

&&

$$

CAZ050-056-058-202215-
/O.CON.KSGX.HW.W.0002.250121T1200Z-250122T0400Z/
San Diego County Valleys-Riverside County Mountains-San Diego
County Mountains-
Including the cities of Escondido, Santee, Julian, San Marcos, La
Mesa, Poway, Pine Valley, Idyllwild-Pine Cove, and El Cajon
342 AM PST Mon Jan 20 2025

...HIGH WIND WARNING REMAINS IN EFFECT FROM 4 AM TO 8 PM PST 
TUESDAY...

* WHAT...Northeast and east winds 25 to 35 mph with gusts up to 60 
  mph possible. Isolated gusts in excess of 75 mph on the favored 
  coastal slopes of the San Diego County Mountains Monday night into 
  Tuesday morning.

* WHERE...Riverside County Mountains, San Diego County Mountains, 
  and San Diego County Valleys.

* WHEN...From 4 AM to 8 PM PST Tuesday.

* IMPACTS...Damaging winds could blow down trees and power lines. 
  Power outages are possible. Travel will be difficult, especially 
  for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain in the lower levels of your home during the windstorm, and 
avoid windows. Watch for falling debris and tree limbs. Use caution 
if you must drive.

&&

$$

12

047 
WWUS76 KSGX 202119
NPWSGX

URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
119 PM PST Mon Jan 20 2025

CAZ048-055-057-065-210630-
/O.CON.KSGX.HW.W.0002.250121T0400Z-250122T0400Z/
San Bernardino and Riverside County Valleys-The Inland Empire-San
Bernardino County Mountains-Santa Ana Mountains and Foothills-San
Gorgonio Pass Near Banning-
Including the cities of Riverside, Crestline, Lake Arrowhead,
Moreno Valley, Ontario, Banning, San Bernardino, Corona, Running
Springs, Wrightwood, Big Bear City, Big Bear Lake, Fontana,
Rancho Cucamonga, and Desert Hot Springs
119 PM PST Mon Jan 20 2025

...HIGH WIND WARNING REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 8 
PM PST TUESDAY...

* WHAT...Northeast winds 25 to 40 mph with gusts up to 60 mph. 
  Isolated gusts in excess of 75 mph on the favored coastal slopes 
  and canyons in the San Bernardino and Santa Ana Mountains Monday 
  night into Tuesday morning.

* WHERE...San Bernardino County Mountains, San Bernardino and 
  Riverside County Valleys-The Inland Empire, San Gorgonio Pass Near 
  Banning, and Santa Ana Mountains and Foothills.

* WHEN...From 8 PM this evening to 8 PM PST Tuesday.

* IMPACTS...Damaging winds could blow down trees and power lines. 
  Travel could be difficult, especially for high profile vehicles. 
  Damage to unsecured outdoor objects.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain in the lower levels of your home during the windstorm, and 
avoid windows. Watch for falling debris and tree limbs. Use caution 
if you must drive.

&&

$$

CAZ050-056-058-210630-
/O.CON.KSGX.HW.W.0002.250121T1200Z-250122T0400Z/
San Diego County Valleys-Riverside County Mountains-San Diego
County Mountains-
Including the cities of La Mesa, Julian, El Cajon, Idyllwild-Pine
Cove, Poway, Escondido, Pine Valley, Santee, and San Marcos
119 PM PST Mon Jan 20 2025

...HIGH WIND WARNING REMAINS IN EFFECT FROM 4 AM TO 8 PM PST 
TUESDAY...

* WHAT...Northeast and east winds 25 to 35 mph with gusts up to 60 
  mph possible. Isolated gusts in excess of 80 mph on the favored 
  coastal slopes of the San Diego County Mountains Monday night into 
  Tuesday morning.

* WHERE...Riverside County Mountains, San Diego County Mountains, 
  and San Diego County Valleys.

* WHEN...From 4 AM to 8 PM PST Tuesday.

* IMPACTS...Damaging winds could blow down trees and power lines. 
  Power outages are possible. Travel will be difficult, especially 
  for high profile vehicles. Damage to unsecured outdoor objects.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain in the lower levels of your home during the windstorm, and 
avoid windows. Watch for falling debris and tree limbs. Use caution 
if you must drive.

&&

$$

APR

359 
WWUS76 KSGX 210419
NPWSGX

URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
819 PM PST Mon Jan 20 2025

CAZ048-055-057-065-211415-
/O.EXT.KSGX.HW.W.0002.000000T0000Z-250122T0000Z/
San Bernardino and Riverside County Valleys-The Inland Empire-San
Bernardino County Mountains-Santa Ana Mountains and Foothills-San
Gorgonio Pass Near Banning-
Including the cities of Ontario, Fontana, Big Bear Lake, Corona,
Wrightwood, Riverside, Crestline, Desert Hot Springs, Big Bear
City, Running Springs, Lake Arrowhead, San Bernardino, Banning,
Rancho Cucamonga, and Moreno Valley
819 PM PST Mon Jan 20 2025

...HIGH WIND WARNING NOW IN EFFECT UNTIL 4 PM PST TUESDAY...

* WHAT...Northeast winds 25 to 35 mph with gusts up to 65 mph.

* WHERE...San Bernardino County Mountains, San Bernardino and 
  Riverside County Valleys-The Inland Empire, San Gorgonio Pass Near 
  Banning, and Santa Ana Mountains and Foothills.

* WHEN...Until 4 PM PST Tuesday.

* IMPACTS...Damaging winds could blow down trees and power lines. 
  Travel could be difficult, especially for high profile vehicles. 
  Damage to unsecured outdoor objects.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Watch for falling debris and tree limbs. Use caution if you must 
drive.

&&

$$

CAZ050-056-058-211415-
/O.EXT.KSGX.HW.W.0002.250121T0500Z-250122T0000Z/
San Diego County Valleys-Riverside County Mountains-San Diego
County Mountains-
Including the cities of Julian, Pine Valley, El Cajon,
Idyllwild-Pine Cove, Poway, Escondido, San Marcos, Santee, and La
Mesa
819 PM PST Mon Jan 20 2025

...HIGH WIND WARNING NOW IN EFFECT UNTIL 4 PM PST TUESDAY...

* WHAT...East winds 25 to 35 mph with gusts up to 60 mph expected. 
  Isolated gusts up to 80 mph on the favored coastal slopes of the 
  San Diego County Mountains tonight into Tuesday morning.

* WHERE...Riverside County Mountains, San Diego County Mountains, 
  and San Diego County Valleys.

* WHEN...Until 4 PM PST Tuesday.

* IMPACTS...Damaging winds could blow down trees and power lines. 
  Power outages are possible. Travel will be difficult, especially 
  for high profile vehicles. Damage to unsecured outdoor objects.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Watch for falling debris and tree limbs. Use caution if you must 
drive.

&&

$$

SS

996 
WWUS76 KSGX 211142
NPWSGX

URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
342 AM PST Tue Jan 21 2025

CAZ048-055-057-065-212215-
/O.CON.KSGX.HW.W.0002.000000T0000Z-250122T0000Z/
San Bernardino and Riverside County Valleys-The Inland Empire-San
Bernardino County Mountains-Santa Ana Mountains and Foothills-San
Gorgonio Pass Near Banning-
Including the cities of Running Springs, Corona, Fontana, Big
Bear Lake, Big Bear City, Desert Hot Springs, San Bernardino,
Moreno Valley, Ontario, Crestline, Rancho Cucamonga, Banning,
Lake Arrowhead, Riverside, and Wrightwood
342 AM PST Tue Jan 21 2025

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 4 PM PST THIS 
AFTERNOON...

* WHAT...Northeast winds 15 to 25 mph with gusts to 50 mph. Isolated 
  gusts to 60 mph.

* WHERE...San Bernardino County Mountains, San Bernardino and 
  Riverside County Valleys-The Inland Empire, San Gorgonio Pass Near 
  Banning, and Santa Ana Mountains and Foothills.

* WHEN...Until 4 PM PST this afternoon.

* IMPACTS...Damaging winds could blow down trees and power lines. 
  Power outages are possible. Travel will be difficult, especially 
  for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain in the lower levels of your home during the windstorm, and 
avoid windows. Watch for falling debris and tree limbs. Use caution 
if you must drive.

&&

$$

CAZ050-056-058-212215-
/O.CON.KSGX.HW.W.0002.000000T0000Z-250122T0000Z/
San Diego County Valleys-Riverside County Mountains-San Diego
County Mountains-
Including the cities of Julian, La Mesa, Santee, Escondido, San
Marcos, El Cajon, Pine Valley, Idyllwild-Pine Cove, and Poway
342 AM PST Tue Jan 21 2025

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 4 PM PST THIS 
AFTERNOON...

* WHAT...East winds 30 to 40 mph with gusts to 70 mph. Isolated 
  gusts to 80 to 90 mph for the San Diego County mountains.

* WHERE...Riverside County Mountains, San Diego County Mountains, 
  and San Diego County Valleys.

* WHEN...Until 4 PM PST this afternoon.

* IMPACTS...Damaging winds could blow down trees and power lines. 
  Power outages are possible. Travel will be difficult, especially 
  for high profile vehicles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain in the lower levels of your home during the windstorm, and 
avoid windows. Watch for falling debris and tree limbs. Use caution 
if you must drive.

&&

$$

17

262 
WWUS76 KSGX 212111
NPWSGX

URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
111 PM PST Tue Jan 21 2025

CAZ048-055-057-065-220000-
/O.CON.KSGX.HW.W.0002.000000T0000Z-250122T0000Z/
San Bernardino and Riverside County Valleys-The Inland Empire-San
Bernardino County Mountains-Santa Ana Mountains and Foothills-San
Gorgonio Pass Near Banning-
Including the cities of Crestline, Big Bear City, Wrightwood,
Banning, Ontario, Desert Hot Springs, Moreno Valley, Rancho
Cucamonga, San Bernardino, Lake Arrowhead, Riverside, Fontana,
Corona, Running Springs, and Big Bear Lake
111 PM PST Tue Jan 21 2025

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 4 PM PST THIS 
AFTERNOON...

* WHAT...Gusty Santa Ana winds decreasing to northeast winds 10 to 
  20 mph with gusts up to 40 mph in wind prone areas during tonight.

* WHERE...San Bernardino County Mountains, San Bernardino and 
  Riverside County Valleys-The Inland Empire, San Gorgonio Pass Near 
  Banning, and Santa Ana Mountains and Foothills.

* WHEN...Until 4 PM PST this afternoon.

* IMPACTS...Damaging winds could blow down trees and power lines. 
  Power outages are possible. Travel will be difficult, especially 
  for high profile vehicles.

* ADDITIONAL DETAILS...Wind increasing again during Wednesday and 
  Wednesday night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain in the lower levels of your home during the windstorm, and 
avoid windows. Watch for falling debris and tree limbs. Use caution 
if you must drive.

&&

$$

CAZ050-056-058-220000-
/O.CON.KSGX.HW.W.0002.000000T0000Z-250122T0000Z/
San Diego County Valleys-Riverside County Mountains-San Diego
County Mountains-
Including the cities of Santee, San Marcos, Idyllwild-Pine Cove,
Julian, La Mesa, El Cajon, Pine Valley, Poway, and Escondido
111 PM PST Tue Jan 21 2025

...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 4 PM PST THIS 
AFTERNOON...

* WHAT...East winds 20 to 30 mph with gusts up to 55 mph then 
  decreasing to 10 to 20 mph this evening and overnight.

* WHERE...Riverside County Mountains, San Diego County Mountains, 
  and San Diego County Valleys.

* WHEN...Until 4 PM PST this afternoon.

* IMPACTS...Damaging winds could blow down trees and power lines. 
  Power outages are possible. Travel will be difficult, especially 
  for high profile vehicles.

* ADDITIONAL DETAILS...Wind increasing again Wednesday and Wednesday 
  night.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain in the lower levels of your home during the windstorm, and 
avoid windows. Watch for falling debris and tree limbs. Use caution 
if you must drive.

&&

$$

Tardy

Area Forecast Discussion
National Weather Service San Diego CA
921 AM PST Sun Jan 19 2025

.SYNOPSIS...
Onshore flow will continue to bring cooler weather and partly
cloudy skies west of the mountains during the nights and mornings
into Monday. Moderate to strong Santa Ana Winds will develop late
Monday and continue through Tuesday evening. A second, weaker
Santa Ana event is possible on Thursday. There is a chance of rain
next Saturday and Sunday.

&&

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

Update: Latest model guidance alludes to the initiation of the
Santa Ana wind conditions to begin over the higher elevations on
Monday morning as early as 7 AM, with winds switching and
increasing out of a ENE'ly direction. The WRF has some of these
winds mixing down to the lower elevations in Orange County just
before Noon, otherwise in general, it will likely be sometime
during the early afternoon hours for most of the lower valleys
and coastal areas to begin to experience winds increasing out of
the northeast. Once this happens, RH values will begin to drop off
quickly, with values falling to as low as 5 percent locally in
some areas, and only a slight recovery overnight into Tuesday
morning. Across the mountains, the HRRR is still pinging some
areas within the Mt. Laguna area having 50kt pennants at the
surface at around 2 AM on Tuesday. This translates to sustained
winds of being close to 60 mph for some of the higher peaks, as
well as gusts of up to near 80 mph possible for a few remote
locations by early Tuesday morning.

As winds decouple Monday night, winds will weaken for some of the
inland valleys. that being said, there could still be enough
mixing for there to be continued gusty winds for some areas,
especially for the coastal regions and valleys not protected by
surrounding terrain. For areas where winds will weaken, very dry
air in place and sufficient radiational cooling as a result will
give way to a chilly night for some of the wind-protected valleys,
and patch frost possible due to this. Where the winds are still
mixing to the surface, temperatures will be quite a bit warmer.
This will make it a challenge for overnight lows achieving their
forecast minimum for some locations Monday night. By later in the
morning on Tuesday, winds will eventually mix down to the surface
for all locations with winds retiring to being gusty out of the
ENE for the lower elevations. The one caveat to this is the WRF
showing the formation of a weak coastal eddy near Carlsbad, which
may result in a switch-around of winds out of the west and weak
onshore flow for the Del Mar area and south to the Mexican border
towards the afternoon hours on Tuesday. If this does occur, with
will help to usher in some cooler temperatures, as well as higher
RH values, which may help to at least mitigate the critical fire
weather threat for some of the inland valleys. By later in the
evening on Tuesday, winds should continue to subside as the
pressure gradient loosens, with only some gusty winds to around 30
mph remaining in place over the higher elevations, with a cease
of Santa Ana conditions elsewhere.

(Previous discussion submitted at 321 AM)

Key Points:

- Moderate to strong and potentially damaging Santa Ana winds
  Monday night through Tuesday evening.

- There is a 50-60 percent chance of a moderate strength Santa Ana
  event on Thursday.

- There is a 20-30 percent chance of measurable precipitation next
  Saturday and Sunday.

Weak onshore flow will continue through tonight, with marine layer
low clouds returning to the coastal areas and western portions of
the inland valleys tonight into Monday morning. Some patchy fog
may develop on mesas and higher terrain away from the immediate
coast tonight into Monday morning. High temperatures today will
be up to 10 degrees below seasonal averages in coastal areas and
valleys while in the mountains and the upper deserts, high
temperatures will be a few degrees above seasonal averages.

A surface high moving into the Great Basin on Monday will create
moderate to strong offshore sfc pressure gradients. The effects
of the offshore flow will be enhanced by a shortwave trough moving
south in the mean flow aloft. The outcome will be a moderate to
strong Santa Ana event, with strong northeast to east winds
developing Monday afternoon and continuing into Tuesday evening
leading to critical fire weather conditions. Please see our Fire
Weather section below and the latest Red Flag Warning for more
information. This system will bring in cooler and drier air, with
highs in the 60s west of the mountains and lower deserts, and 40s
across the mountains. Nights will continue to be chilly,
especially for wind-sheltered valley locations that may dip into
the upper 20s and lower 30s with patchy frost in the early morning.

As the upper level shortwave trough moves to the east and sfc
pressure gradients weaken on Wednesday, there could be some
humidity recovery in the coastal areas. As we lose the cold air
advection from the Great Basin and high pressure aloft shifts over
SoCal from the west, high temperatures will rise into the 70s west
of the mtns on Wed and remain there through Friday.

Another weaker Santa Ana event could develop for Thursday as a
second shortwave trough moves into the Great Basin with a
following sfc high setting up offshore flow. Mostly due to the
track of the shortwave and the intensity of the sfc high, most
solutions across model platforms indicate that this will be a
significantly weaker event than the Mon/Tue event.

For next weekend, most model solutions show a low pressure system
bringing cooler, cloudy conditions with onshore flow to SoCal.
While the models are in fairly good agreement with respect to the
synoptic pattern, there remains significant differences in the
details so forecast confidence for next weekend is moderate at
best. About a third of ensemble members across model platforms
indicate 20-30 percent chances for measurable precipitation next
Sat and Sun.

&&

.AVIATION...
191645Z....Coasts/Valleys...Low clouds continue to push onshore,
with varying bases 1800-2500ft MSL and tops to 2800ft MSL up to 20
miles inland. VIS is variable too, with 5-6SM+ along the coast and 2-
5SM for inland valleys and coastal terrain. Some inland valleys
where there are no low clouds have VIS down to 0SM due to ground FG.
These MVFR CIGs will continue through 18-19z for western valleys,
and through 19-20z for coastal sites. Clouds should retreat to the
coast after this point, with lingering stratus near the beaches, but
brief periods of SCT-BKN low clouds may continue at KSAN through the
afternoon. There is fairly high confidence in low clouds pushing
onshore again this evening, between 00-03z, with similar bases
around 1000-1800ft MSL. VIS reductions possible, especially for
coastal terrain, Inland Empire, and valleys where clouds may produce
near-zero VIS. Low clouds/FG may linger into the afternoon on
Monday.

.Mountains/Deserts...Low clouds look to filter in and push up
against coastal slopes tonight beginning around 03z, leading to low
or no VIS through Monday morning. Clouds should clear mountains by
17z Monday as strong N to NE flow develops, with gusts up to 35-
40kts by Monday evening. Strong up/down drafts possible near any
mountains with localized areas of blowing dust.

NWS San Diego is aware of limited communications of observations
from KTRM since January 8th. We are working with the FAA to address
this issue.

&&

.MARINE...
Strong Santa Ana winds develop Monday night, with gusts up to 25
knots possible over the waters late Monday night into Tuesday
morning. A Small Craft Advisory is now in effect and contains more
details.

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Red Flag Warning from 10 AM Monday to 10 PM PST Tuesday for
     Orange County Inland Areas-Riverside County Mountains-
     Including The San Jacinto Ranger District Of The San
     Bernardino National Forest-San Bernardino County Mountains-
     Including The Mountain Top And Front Country Ranger
     Districts Of The San Bernardino National Forest-San
     Bernardino and Riverside County Valleys  -The Inland Empire-
     San Diego County Inland Valleys-San Diego County Mountains-
     Including The Palomar And Descanso Ranger Districts of the
     Cleveland National Forest-San Gorgonio Pass Near Banning-
     Santa Ana Mountains-Including The Trabuco Ranger District
     of the Cleveland National Forest.

     High Wind Watch from Monday evening through Tuesday evening for
     San Bernardino County Mountains-San Bernardino and
     Riverside County Valleys-The Inland Empire-San Gorgonio
     Pass Near Banning-Santa Ana Mountains and Foothills.

     High Wind Watch from late Monday night through Tuesday evening
     for Riverside County Mountains-San Diego County Mountains-
     San Diego County Valleys.

PZ...Small Craft Advisory from 10 PM Monday to 10 AM PST Tuesday for
     Coastal Waters from San Mateo Point to the Mexican Border
     and out to 30 nm-Waters from San Mateo Point to the Mexican
     Border Extending 30 to 60 nm out including San Clemente
     Island.

&&

UPDATE...Stewey
PUBLIC...PG
AVIATION/MARINE...Zuber