Wind Advisory 2, NWS San Diego, CA

126 
WWUS76 KSGX 132055
NPWSGX

URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
1255 PM PST Mon Jan 13 2025

CAZ048-140615-
/O.CON.KSGX.WI.Y.0002.000000T0000Z-250116T0200Z/
/O.CON.KSGX.FR.Y.0002.250114T0800Z-250114T1700Z/
San Bernardino and Riverside County Valleys-The Inland Empire-
Including the cities of Ontario, San Bernardino, Corona, Fontana,
Rancho Cucamonga, Moreno Valley, and Riverside
1255 PM PST Mon Jan 13 2025

...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM PST WEDNESDAY...
...FROST ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 9 AM 
PST TUESDAY...

* WHAT...For the Wind Advisory, northeast winds 15 to 25 mph with 
  gusts up to 50 mph. For the Frost Advisory, temperatures as low as 
  28 will result in frost formation.

* WHERE...San Bernardino and Riverside County Valleys-The Inland 
  Empire.

* WHEN...For the Wind Advisory, until 6 PM PST Wednesday. For the 
  Frost Advisory, from midnight tonight to 9 AM PST Tuesday.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree 
  limbs could be blown down and a few power outages may result. 
  Frost could harm sensitive outdoor vegetation. Sensitive outdoor 
  plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds this strong can make driving difficult, especially for high 
profile vehicles. Use extra caution.

Take steps now to protect tender plants from the cold.

&&

$$

CAZ055-057-065-554-140615-
/O.CON.KSGX.WI.Y.0002.000000T0000Z-250116T0200Z/
San Bernardino County Mountains-Santa Ana Mountains and Foothills-
San Gorgonio Pass Near Banning-Orange County Inland Areas-
Including the cities of Garden Grove, Desert Hot Springs, Big
Bear Lake, Big Bear City, Wrightwood, Fullerton, Crestline,
Orange, Lake Arrowhead, Running Springs, Anaheim, Mission Viejo,
Santa Ana, Irvine, and Banning
1255 PM PST Mon Jan 13 2025

...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM PST WEDNESDAY...

* WHAT...Northeast winds 20 to 30 mph with gusts up to 50 mph.

* WHERE...Orange County Inland Areas, San Bernardino County 
  Mountains, San Gorgonio Pass Near Banning, and Santa Ana Mountains 
  and Foothills.

* WHEN...Until 6 PM PST Wednesday.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree 
  limbs could be blown down and a few power outages may result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds this strong can make driving difficult, especially for high 
profile vehicles. Use extra caution.

&&

$$

CAZ050-056-058-140615-
/O.CON.KSGX.WI.Y.0002.250114T0000Z-250116T0200Z/
San Diego County Valleys-Riverside County Mountains-San Diego
County Mountains-
Including the cities of Escondido, Poway, El Cajon, Julian,
Santee, La Mesa, San Marcos, Idyllwild-Pine Cove, and Pine Valley
1255 PM PST Mon Jan 13 2025

...WIND ADVISORY REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO 6 PM 
PST WEDNESDAY...

* WHAT...Northeast winds 20 to 30 mph with gusts up to 55 mph 
  expected.

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

* WHEN...From 4 PM this afternoon to 6 PM PST Wednesday.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree 
  limbs could be blown down and a few power outages may result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds this strong can make driving difficult, especially for high 
profile vehicles. Use extra caution.

&&

$$

12

448 
WWUS76 KSGX 140504
NPWSGX

URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
904 PM PST Mon Jan 13 2025

CAZ048-141315-
/O.CON.KSGX.WI.Y.0002.000000T0000Z-250116T0200Z/
/O.CON.KSGX.FR.Y.0002.250114T0800Z-250114T1700Z/
San Bernardino and Riverside County Valleys-The Inland Empire-
Including the cities of Fontana, San Bernardino, Rancho
Cucamonga, Corona, Ontario, Moreno Valley, and Riverside
904 PM PST Mon Jan 13 2025

...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM PST WEDNESDAY...
...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PST TUESDAY...

* WHAT...For the Wind Advisory, northeast winds 15 to 25 mph with 
  gusts up to 50 mph. For the Frost Advisory, temperatures as low as 
  28 will result in frost formation.

* WHERE...San Bernardino and Riverside County Valleys-The Inland 
  Empire.

* WHEN...For the Wind Advisory, until 6 PM PST Wednesday. For the 
  Frost Advisory, until 9 AM PST Tuesday.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree 
  limbs could be blown down and a few power outages may result. 
  Frost could harm sensitive outdoor vegetation. Sensitive outdoor 
  plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds this strong can make driving difficult, especially for high 
profile vehicles. Use extra caution.

Take steps now to protect tender plants from the cold.

&&

$$

CAZ050-056-058-141315-
/O.CON.KSGX.WI.Y.0002.000000T0000Z-250116T0200Z/
San Diego County Valleys-Riverside County Mountains-San Diego
County Mountains-
Including the cities of La Mesa, Poway, Pine Valley,
Idyllwild-Pine Cove, Julian, San Marcos, Santee, El Cajon, and
Escondido
904 PM PST Mon Jan 13 2025

...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM PST WEDNESDAY...

* WHAT...Northeast winds 20 to 30 mph with gusts to 55 mph expected.

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

* WHEN...Until 6 PM PST Wednesday.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree 
  limbs could be blown down and a few power outages may result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds this strong can make driving difficult, especially for high 
profile vehicles. Use extra caution.

&&

$$

CAZ055-057-065-554-141315-
/O.CON.KSGX.WI.Y.0002.000000T0000Z-250116T0200Z/
San Bernardino County Mountains-Santa Ana Mountains and Foothills-
San Gorgonio Pass Near Banning-Orange County Inland Areas-
Including the cities of Mission Viejo, Anaheim, Big Bear City,
Crestline, Desert Hot Springs, Wrightwood, Lake Arrowhead, Garden
Grove, Running Springs, Orange, Banning, Santa Ana, Irvine, Big
Bear Lake, and Fullerton
904 PM PST Mon Jan 13 2025

...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM PST WEDNESDAY...

* WHAT...Northeast winds 20 to 30 mph with gusts to 50 mph expected.

* WHERE...Orange County Inland Areas, San Bernardino County 
  Mountains, San Gorgonio Pass Near Banning, and Santa Ana Mountains 
  and Foothills.

* WHEN...Until 6 PM PST Wednesday.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree 
  limbs could be blown down and a few power outages may result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds this strong can make driving difficult, especially for high 
profile vehicles. Use extra caution.

&&

$$

Suk

160 
WWUS76 KSGX 141043
NPWSGX

URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
243 AM PST Tue Jan 14 2025

CAZ048-142230-
/O.CON.KSGX.FR.Y.0002.000000T0000Z-250114T1700Z/
/O.CON.KSGX.WI.Y.0002.000000T0000Z-250116T0200Z/
San Bernardino and Riverside County Valleys-The Inland Empire-
Including the cities of Moreno Valley, Ontario, Fontana, San
Bernardino, Rancho Cucamonga, Corona, and Riverside
243 AM PST Tue Jan 14 2025

...FROST ADVISORY REMAINS IN EFFECT UNTIL 9 AM PST THIS MORNING FOR 
WIND SHELTERED LOCATIONS...
...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM PST WEDNESDAY...

* WHAT...For the Frost Advisory, temperatures as low as 32 will 
  result in frost formation. For the Wind Advisory, northeast winds 
  20 to 30 mph with gusts to 60 mph.

* WHERE...San Bernardino and Riverside County Valleys-The Inland 
  Empire.

* WHEN...For the Frost Advisory, until 9 AM PST this morning. For 
  the Wind Advisory, until 6 PM PST Wednesday.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree 
  limbs could be blown down and a few power outages may result. 
  Frost could harm sensitive outdoor vegetation. Sensitive outdoor 
  plants may be killed if left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

Winds this strong can make driving difficult, especially for high 
profile vehicles. Use extra caution.

&&

$$

CAZ050-056-058-142230-
/O.CON.KSGX.WI.Y.0002.000000T0000Z-250116T0200Z/
San Diego County Valleys-Riverside County Mountains-San Diego
County Mountains-
Including the cities of San Marcos, Poway, Escondido, Julian,
Santee, El Cajon, Idyllwild-Pine Cove, La Mesa, and Pine Valley
243 AM PST Tue Jan 14 2025

...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM PST WEDNESDAY...

* WHAT...Northeast winds 20 to 30 mph with gusts to 55 mph.

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

* WHEN...Until 6 PM PST Wednesday.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree 
  limbs could be blown down and a few power outages may result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds this strong can make driving difficult, especially for high 
profile vehicles. Use extra caution.

&&

$$

CAZ055-057-065-554-142230-
/O.CON.KSGX.WI.Y.0002.000000T0000Z-250116T0200Z/
San Bernardino County Mountains-Santa Ana Mountains and Foothills-
San Gorgonio Pass Near Banning-Orange County Inland Areas-
Including the cities of Banning, Big Bear Lake, Santa Ana,
Irvine, Anaheim, Garden Grove, Big Bear City, Wrightwood,
Fullerton, Mission Viejo, Running Springs, Lake Arrowhead,
Crestline, Orange, and Desert Hot Springs
243 AM PST Tue Jan 14 2025

...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM PST WEDNESDAY...

* WHAT...Northeast winds 20 to 30 mph with gusts to 50 mph.

* WHERE...Orange County Inland Areas, San Bernardino County 
  Mountains, San Gorgonio Pass Near Banning, and Santa Ana Mountains 
  and Foothills.

* WHEN...Until 6 PM PST Wednesday.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree 
  limbs could be blown down and a few power outages may result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds this strong can make driving difficult, especially for high 
profile vehicles. Use extra caution.

&&

$$

17

957 
WWUS76 KSGX 142127
NPWSGX

URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
127 PM PST Tue Jan 14 2025

CAZ048-055-057-065-554-150615-
/O.CON.KSGX.WI.Y.0002.000000T0000Z-250116T0200Z/
San Bernardino and Riverside County Valleys-The Inland Empire-San
Bernardino County Mountains-Santa Ana Mountains and Foothills-San
Gorgonio Pass Near Banning-Orange County Inland Areas-
Including the cities of Moreno Valley, Desert Hot Springs, San
Bernardino, Irvine, Mission Viejo, Wrightwood, Big Bear Lake,
Crestline, Riverside, Running Springs, Orange, Corona, Fullerton,
Big Bear City, Lake Arrowhead, Garden Grove, Santa Ana, Anaheim,
Ontario, Fontana, Banning, and Rancho Cucamonga
127 PM PST Tue Jan 14 2025

...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM PST WEDNESDAY...

* WHAT...Northeast winds 20 to 30 mph with gusts to 50 mph and 
  locally to 55 mph.

* WHERE...Orange County Inland Areas, 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 6 PM PST Wednesday.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree 
  limbs could be blown down and a few power outages may result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds this strong can make driving difficult, especially for high 
profile vehicles. Use extra caution.

&&

$$

CAZ050-056-058-150615-
/O.CON.KSGX.WI.Y.0002.000000T0000Z-250116T0200Z/
San Diego County Valleys-Riverside County Mountains-San Diego
County Mountains-
Including the cities of La Mesa, Poway, San Marcos, Julian, El
Cajon, Pine Valley, Escondido, Santee, and Idyllwild-Pine Cove
127 PM PST Tue Jan 14 2025

...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM PST WEDNESDAY...

* WHAT...East winds 20 to 30 mph with gusts up to 50 mph.

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

* WHEN...Until 6 PM PST Wednesday.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree 
  limbs could be blown down and a few power outages may result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds this strong can make driving difficult, especially for high 
profile vehicles. Use extra caution.

&&

$$

12

250 
WWUS76 KSGX 150422
NPWSGX

URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
822 PM PST Tue Jan 14 2025

CAZ048-055-057-065-554-151415-
/O.CON.KSGX.WI.Y.0002.000000T0000Z-250116T0200Z/
San Bernardino and Riverside County Valleys-The Inland Empire-San
Bernardino County Mountains-Santa Ana Mountains and Foothills-San
Gorgonio Pass Near Banning-Orange County Inland Areas-
Including the cities of Santa Ana, Wrightwood, Desert Hot
Springs, Fontana, Big Bear Lake, San Bernardino, Anaheim, Running
Springs, Lake Arrowhead, Orange, Rancho Cucamonga, Crestline,
Riverside, Moreno Valley, Irvine, Big Bear City, Banning,
Fullerton, Mission Viejo, Ontario, Garden Grove, and Corona
822 PM PST Tue Jan 14 2025

...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM PST WEDNESDAY...

* WHAT...Northeast winds 20 to 30 mph with gusts to 50 mph and 
  locally to 55 mph.

* WHERE...Orange County Inland Areas, 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 6 PM PST Wednesday.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree 
  limbs could be blown down and a few power outages may result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds this strong can make driving difficult, especially for high 
profile vehicles. Use extra caution.

&&

$$

CAZ050-056-058-151415-
/O.CON.KSGX.WI.Y.0002.000000T0000Z-250116T0200Z/
San Diego County Valleys-Riverside County Mountains-San Diego
County Mountains-
Including the cities of Santee, La Mesa, Escondido, Julian, San
Marcos, Idyllwild-Pine Cove, El Cajon, Poway, and Pine Valley
822 PM PST Tue Jan 14 2025

...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM PST WEDNESDAY...

* WHAT...East to northeast winds 20 to 30 mph with gusts to 55 mph.

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

* WHEN...Until 6 PM PST Wednesday.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree 
  limbs could be blown down and a few power outages may result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds this strong can make driving difficult, especially for high 
profile vehicles. Use extra caution.

&&

$$

CO

073 
WWUS76 KSGX 151040
NPWSGX

URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
240 AM PST Wed Jan 15 2025

CAZ048-055-057-065-554-160200-
/O.CON.KSGX.WI.Y.0002.000000T0000Z-250116T0200Z/
San Bernardino and Riverside County Valleys-The Inland Empire-San
Bernardino County Mountains-Santa Ana Mountains and Foothills-San
Gorgonio Pass Near Banning-Orange County Inland Areas-
Including the cities of Fontana, Fullerton, Desert Hot Springs,
Crestline, Banning, Moreno Valley, Corona, Big Bear Lake, Garden
Grove, Rancho Cucamonga, Anaheim, Orange, Santa Ana, Mission
Viejo, Lake Arrowhead, Riverside, Running Springs, San
Bernardino, Irvine, Ontario, Big Bear City, and Wrightwood
240 AM PST Wed Jan 15 2025

...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM PST THIS EVENING...

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

* WHERE...Orange County Inland Areas, 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 6 PM PST this evening.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree 
  limbs could be blown down and a few power outages may result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds this strong can make driving difficult, especially for high 
profile vehicles. Use extra caution.

&&

$$

CAZ050-056-058-160200-
/O.CON.KSGX.WI.Y.0002.000000T0000Z-250116T0200Z/
San Diego County Valleys-Riverside County Mountains-San Diego
County Mountains-
Including the cities of El Cajon, San Marcos, Julian, La Mesa,
Santee, Poway, Escondido, Pine Valley, and Idyllwild-Pine Cove
240 AM PST Wed Jan 15 2025

...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM PST THIS EVENING...

* WHAT...East winds 20 to 30 mph with gusts to 55 mph.

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

* WHEN...Until 6 PM PST this evening.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree 
  limbs could be blown down and a few power outages may result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds this strong can make driving difficult, especially for high 
profile vehicles. Use extra caution.

&&

$$

17

194 
WWUS76 KSGX 151852
NPWSGX

URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
1052 AM PST Wed Jan 15 2025

CAZ048-055-057-065-554-160200-
/O.CON.KSGX.WI.Y.0002.000000T0000Z-250116T0200Z/
San Bernardino and Riverside County Valleys-The Inland Empire-San
Bernardino County Mountains-Santa Ana Mountains and Foothills-San
Gorgonio Pass Near Banning-Orange County Inland Areas-
Including the cities of Santa Ana, Riverside, Banning, Ontario,
Corona, Running Springs, San Bernardino, Crestline, Moreno
Valley, Mission Viejo, Irvine, Fullerton, Big Bear City, Rancho
Cucamonga, Wrightwood, Fontana, Big Bear Lake, Anaheim, Orange,
Desert Hot Springs, Garden Grove, and Lake Arrowhead
1052 AM PST Wed Jan 15 2025

...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM PST THIS EVENING...

* WHAT...Northeast to east winds 15 to 25 mph with gusts up to 45 
  mph in wind prone canyons and passes. Winds decreasing to 10 to 20 
  mph with localized gusts to 30 mph in the afternoon.

* WHERE...Orange County Inland Areas, 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 6 PM PST this evening.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree 
  limbs could be blown down and a few power outages may result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds this strong can make driving difficult, especially for high 
profile vehicles. Use extra caution.

&&

$$

CAZ050-056-058-160200-
/O.CON.KSGX.WI.Y.0002.000000T0000Z-250116T0200Z/
San Diego County Valleys-Riverside County Mountains-San Diego
County Mountains-
Including the cities of San Marcos, El Cajon, Escondido, Poway,
Santee, Pine Valley, Idyllwild-Pine Cove, La Mesa, and Julian
1052 AM PST Wed Jan 15 2025

...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM PST THIS EVENING...

* WHAT...East winds 20 to 30 mph with gusts up to 50 mph in wind 
  prone areas. Wind decreasing to speeds of 10 to 20 mph in the 
  afternoon with localized gusts to 30 mph.

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

* WHEN...Until 6 PM PST this evening.

* IMPACTS...Gusty winds will blow around unsecured objects. Tree 
  limbs could be blown down and a few power outages may result.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds this strong can make driving difficult, especially for high 
profile vehicles. Use extra caution.

&&

$$

AT

277 
WWUS76 KSGX 160155
NPWSGX

URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
555 PM PST Wed Jan 15 2025

CAZ048-050-055>058-065-554-160300-
/O.EXP.KSGX.WI.Y.0002.000000T0000Z-250116T0200Z/
San Bernardino and Riverside County Valleys-The Inland Empire-San
Diego County Valleys-San Bernardino County Mountains-Riverside
County Mountains-Santa Ana Mountains and Foothills-San Diego
County Mountains-San Gorgonio Pass Near Banning-Orange County
Inland Areas-
Including the cities of San Bernardino, Desert Hot Springs,
Julian, Corona, Garden Grove, Wrightwood, Santee, Fullerton,
Fontana, Ontario, Running Springs, Idyllwild-Pine Cove, Anaheim,
Pine Valley, Irvine, Riverside, Big Bear Lake, Santa Ana,
Escondido, Big Bear City, Rancho Cucamonga, La Mesa, Moreno
Valley, Orange, El Cajon, Crestline, Poway, Mission Viejo, San
Marcos, Banning, and Lake Arrowhead
555 PM PST Wed Jan 15 2025

...WIND ADVISORY WILL EXPIRE AT 6 PM PST THIS EVENING...

Gusty east to northeast winds have weakened and become more 
localized so the Wind Advisory will be allowed to expire at 6 PM.

$$

CO

Area Forecast Discussion
National Weather Service San Diego CA
911 PM PST Sun Jan 12 2025

.SYNOPSIS...
Santa Ana winds and critical fire weather conditions for the
coastal slopes of the mountains and adjacent foothills and valleys
through the Wednesday. Cooler with a return of onshore flow
Thursday through the weekend, along with a chance of light
precipitation late Friday through the weekend.

&&

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

Evening update...
The brief lull in Santa Ana winds is ongoing this evening as
surface pressure gradients weaken, currently at -1.4 mb SAN-DAG
and -6.5 mb SAN-TPH. As a result, wind gusts are generally
between 25-35 mph in the wind prone passes and canyons. A short
wave dropping south through the Great Basin and splitting tonight
will bring a resurgence of Santa Ana winds, peaking Monday morning
into the early afternoon with gusts up to 45 mph in the wind prone
locations.

Previous discussion...
Sfc pressure gradients will remain offshore through Wednesday and
humidity will remain low. The dry airmass and lack of cloud cover
will enable efficient radiation cooling overnight so that low
temps in the wind-sheltered valley locations will fall into the
30s for the next few days. Lows in the 20s can be expected in
the High Desert and in the teens and in higher elevation mountain
locations. Highs today for inland areas will be 5 to 10 degrees
below average, with slightly above average temperatures expected
near the coast. Slow warming through mid-week before cooler
conditions develop for later in the week and next weekend.

For Monday through Wednesday...Most ensemble solutions indicate
the development of a closed upper low retrograding from WA/OR to a
position about 850 miles southwest of San Diego by Tuesday night,
forming a Rex Block with a high north of the low. Meanwhile, sfc
high pressure in the Great Basin will maintain offshore pressure
gradients and Santa Ana conditions for SoCal. See the Fire Weather
section below for more information on the dry, windy conditions.

The majority of solutions show the closed low to the southwest
beginning to move northeast over SoCal by late Thursday, becoming
an open wave over AZ on Friday afternoon as it becomes absorbed in
the mean westerly flow. Most ensemble solutions show slight
chances for mostly light precipitation in SoCal on Sat and Sun.
Since most of the available moisture will likely be concentrated
in the boundary layer, any precipitation will be light and
restricted to the mountain slopes and areas west to the coast.
Numerical model guidance tends to struggle with resolving the
evolution of closed low-latitude lows in this part of the world
so there is significant spread in the model solutions and
consequently much uncertainty in the forecast beyond Thursday.

&&

.AVIATION...
130500Z...Mostly clear skies will continue through Monday evening
with unrestricted VIS. Gusty north to northeast gusts 20-35 kt will
continue at times in the mountains and parts of inland Orange County
and the Inland Empire overnight, with gusts increasing to 25-40 kt
locally Mon/Mon evening.

&&

.MARINE...
Local wind gusts from the northeast could approach 20 kt at times
from Monday night through Wednesday. Otherwise, no hazardous marine
conditions are expected through Friday.

&&

.BEACHES...
Astronomical high tides of 6-7 feet may produce minor tidal overflow
at susceptible low-lying beach parking lots and boardwalks Monday
morning.

&&

.FIRE WEATHER...
Northeast wind gusts of 25-35 mph this evening will increase to
30-45 mph early Monday morning along the coastal slopes of the
San Bernardino mountains into the Inland Empire and on the Santa
Ana mountains into portions of inland Orange County. Poor humidity
recovery tonight for the wind prone areas and foothills, peaking
at only 20-35%.

Another round of Santa Ana winds is expected for Monday through
Wednesday. Winds will become more easterly Monday afternoon,
increasing across the Riverside and San Diego County mountains
and adjacent valleys. Winds are currently forecast to peak
Tuesday and Wednesday, with gusts of 45 to 55 mph expected.
Relative humidity will remain around 10 to 15 percent each
afternoon inland with poor overnight recovery in the wind prone
areas and thermal belts. Red Flag Warnings remain in effect for
the San Bernardino Mountains, Inland Empire, San Gorgonio Pass,
Santa Ana Mountains, and Inland Orange County through 6 PM
Wednesday. A Red Flag Warning will be in effect for the Riverside
and San Diego County Mountains as well as the San Diego County
Valleys from 4 PM Monday through 6 PM Wednesday.

Offshore winds will weaken significantly on Thursday and sea
breezes could develop Thursday afternoon, with minor improvements
in humidity, especially for Orange County and wester parts of the
San Diego County Valleys. Onshore flow will increase on Friday,
bringing cooler weather and a more significant increase in
humidity. There remains a slight (15 to 30 percent) chance of
light precipitation west of the mountains, though the forecast has
already begun to trend drier. There is the potential for a return
of dry offshore winds early next week but uncertainty is high at
this time.

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Red Flag Warning until 6 PM PST Wednesday for Orange County
     Inland Areas-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 Gorgonio Pass Near
     Banning-Santa Ana Mountains-Including The Trabuco Ranger
     District of the Cleveland National Forest.

     Red Flag Warning from 4 PM Monday to 6 PM PST Wednesday for
     Riverside County Mountains-Including The San Jacinto Ranger
     District Of The San Bernardino National Forest-San Diego
     County Inland Valleys-San Diego County Mountains-Including
     The Palomar And Descanso Ranger Districts of the Cleveland
     National Forest.

PZ...None.

&&

PUBLIC...SS/PG
FIRE WEATHER...SS
AVIATION/MARINE/BEACHES...Maxwell