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FXUS66 KLOX [Los Angeles/Oxna CA] 170522 AFDLOX 

FXUS66 KLOX 170522
AFDLOX [HEAD]

Updated
National Weather Service Los Angeles/Oxnard California 9:22pm PST Sat Dec 16 2017 

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
922 PM PST SAT DEC 16 2017 [HEAD]

Synopsis.  

.SYNOPSIS... [DISC]

Strong winds will shift overnight to the northeast with the greatest impacts shifting to Ventura and Los Angeles Counties. Another round of strong offshore flow across the region will begin midweek. Temperatures will fluctuate between slightly above and below normal through the week. 

STRONG WINDS WILL SHIFT OVERNIGHT TO THE NORTHEAST WITH THE
GREATEST IMPACTS SHIFTING TO VENTURA AND LOS ANGELES COUNTIES.
ANOTHER ROUND OF STRONG OFFSHORE FLOW ACROSS THE REGION WILL BEGIN
MIDWEEK. TEMPERATURES WILL FLUCTUATE BETWEEN SLIGHTLY ABOVE AND
BELOW NORMAL THROUGH THE WEEK. [DISC]

Short term. (Sat–Tuesday) 

.SHORT TERM...(SAT-TUE) [DISC]

An upper-level trough of low pressure over Baja California will continue to exit the region tonight as a blocking ridge of high pressure builds in behind it. A cold air mass spreading into the Great Basin tonight is starting to build surface high pressure across the region, which will be the precursor to Santa Ana winds developing later tonight. 

AN UPPER-LEVEL TROUGH OF LOW PRESSURE OVER BAJA CALIFORNIA WILL
CONTINUE TO EXIT THE REGION TONIGHT AS A BLOCKING RIDGE OF HIGH
PRESSURE BUILDS IN BEHIND IT. A COLD AIR MASS SPREADING INTO THE
GREAT BASIN TONIGHT IS STARTING TO BUILD SURFACE HIGH PRESSURE
ACROSS THE REGION, WHICH WILL BE THE PRECURSOR TO SANTA ANA WINDS
DEVELOPING LATER TONIGHT. [DISC]

Northerly surface pressure gradients continue to remain tight across southern Santa Barbara this evening. Marginally gusty winds between 35 and 45 mph continue to linger across the Santa Barbara area and Santa Ynez Range currently. With surface pressure gradients hovering near –5 mb between KSBA [Santa Barbara CA]-KSMX [Santa Maria CA] and KSBA [Santa Barbara CA]-KBFL [Bakersfield CA] and the model solutions not handling the cold air mass associated with this weak weather system very well, an extension of the Red Flag Warning and Wind Advisory is being considered at this time. Local studies on sundowner winds suggest the possibility of these winds lingering a little longer this evening and possibly until between 1am PST and 3am PST. Observations will be monitored closely late this evening and another update will be issued within the hour. 

NORTHERLY SURFACE PRESSURE GRADIENTS CONTINUE TO REMAIN TIGHT
ACROSS SOUTHERN SANTA BARBARA THIS EVENING. MARGINALLY GUSTY WINDS
BETWEEN 35 AND 45 MPH CONTINUE TO LINGER ACROSS THE SANTA BARBARA
AREA AND SANTA YNEZ RANGE CURRENTLY. WITH SURFACE PRESSURE GRADIENTS
HOVERING NEAR -5 MB BETWEEN KSBA-KSMX AND KSBA-KBFL AND THE MODEL
SOLUTIONS NOT HANDLING THE COLD AIR MASS ASSOCIATED WITH THIS
WEAK WEATHER SYSTEM VERY WELL, AN EXTENSION OF THE RED FLAG
WARNING AND WIND ADVISORY IS BEING CONSIDERED AT THIS TIME. LOCAL
STUDIES ON SUNDOWNER WINDS SUGGEST THE POSSIBILITY OF THESE WINDS
LINGERING A LITTLE LONGER THIS EVENING AND POSSIBLY UNTIL BETWEEN
1 AM PST AND 3 AM PST. OBSERVATIONS WILL BE MONITORED CLOSELY LATE
THIS EVENING AND ANOTHER UPDATE WILL BE ISSUED WITHIN THE HOUR. [DISC]

Santa Ana winds are developing a little more slowly than anticipated, but the Wind Advisories were allowed to go into effect as local advisory level gusts are being observed currently. Winds will continue to strengthen tonight as gradients continue to trend offshore. Some concern is placed with the Los Angeles and Ventura County Mountains as model solutions remain on the higher end of advisory criteria and lower end of warning criteria. 950 mb and 850 mb winds increase to near 50 knots [58 mph] overnight with very impressive 850 mb thermal gradients between the Mojave desert and the Los Angeles Basin. There is a chance that Wind Advisories could be replaced with a High Wind Warning if model data starts to tip in favor of a warning level event. 

SANTA ANA WINDS ARE DEVELOPING A LITTLE MORE SLOWLY THAN
ANTICIPATED, BUT THE WIND ADVISORIES WERE ALLOWED TO GO INTO
EFFECT AS LOCAL ADVISORY LEVEL GUSTS ARE BEING OBSERVED CURRENTLY.
WINDS WILL CONTINUE TO STRENGTHEN TONIGHT AS GRADIENTS CONTINUE
TO TREND OFFSHORE. SOME CONCERN IS PLACED WITH THE LOS ANGELES AND
VENTURA COUNTY MOUNTAINS AS MODEL SOLUTIONS REMAIN ON THE HIGHER
END OF ADVISORY CRITERIA AND LOWER END OF WARNING CRITERIA. 950 MB
AND 850 MB WINDS INCREASE TO NEAR 50 KNOTS OVERNIGHT WITH VERY
IMPRESSIVE 850 MB THERMAL GRADIENTS BETWEEN THE MOJAVE DESERT AND
THE LOS ANGELES BASIN. THERE IS A CHANCE THAT WIND ADVISORIES
COULD BE REPLACED WITH A HIGH WIND WARNING IF MODEL DATA STARTS TO
TIP IN FAVOR OF A WARNING LEVEL EVENT. [DISC]

With winds diminishing some in the wind-sheltered areas and interior valleys, minimum temperatures will likely be tweaked some in the latest update. 

WITH WINDS DIMINISHING SOME IN THE WIND-SHELTERED AREAS AND
INTERIOR VALLEYS, MINIMUM TEMPERATURES WILL LIKELY BE TWEAKED
SOME IN THE LATEST UPDATE. [DISC]

from previous discussion  

*** FROM PREVIOUS DISCUSSION *** [DISC]

For Sunday night into Monday morning, there will continue to be gusty NE winds in the wind-prone areas of VTU [Ventura CA]/LA Counties, and winds may be close to advisory levels as times. However, upper-level support for widespread advisory-level winds will diminish. At this time, do not anticipate the Wind Advisories for LA/Ventura Counties to be extended into Monday, although there is still a small chance of that happening. Winds will remain weakly offshore Monday night into Tuesday morning, then turn onshore by Tuesday afternoon. 

FOR SUN NIGHT INTO MON MORNING, THERE WILL CONTINUE TO BE GUSTY
NE WINDS IN THE WIND-PRONE AREAS OF VTU/L.A. COUNTIES, AND WINDS
MAY BE CLOSE TO ADVISORY LEVELS AS TIMES. HOWEVER, UPPER-LEVEL
SUPPORT FOR WIDESPREAD ADVISORY-LEVEL WINDS WILL DIMINISH. AT THIS
TIME, DO NOT ANTICIPATE THE WIND ADVISORIES FOR L.A./VTU COUNTIES
TO BE EXTENDED INTO MON, ALTHO THERE IS STILL A SMALL CHANCE OF
THAT HAPPENING. WINDS WILL REMAIN WEAKLY OFFSHORE MON NIGHT INTO
TUE MORNING, THEN TURN ONSHORE BY TUE AFTERNOON. [DISC]

With all the dry offshore flow moving in again, skies will be mostly clear across the forecast area tonight through Monday. Mostly clear skies should then continue into Tuesday, although it cannot be completely ruled out that a few marine layer clouds may push to the Central Coast or the LA County coast by early Tuesday morning. 

WITH ALL THE DRY OFFSHORE FLOW MOVING IN AGAIN, SKIES WILL BE MOSTLY
CLEAR ACROSS THE FORECAST AREA TONIGHT THRU MON. MOSTLY CLEAR SKIES
SHOULD THEN CONTINUE INTO TUE, ALTHO IT CANNOT BE COMPLETELY RULED
OUT THAT A FEW MARINE LAYER CLOUDS MAY PUSH TO THE CENTRAL COAST OR
THE L.A. COUNTY COAST BY EARLY TUE MORNING. [DISC]

Temps will be mainly near normal to slightly above normal over the region Sun through Monday, with the coolest day for interior areas on Sunday. Temps are expected to warm to several degrees above normal for all areas on Tuesday. 

TEMPS WILL BE MAINLY NEAR NORMAL TO SLIGHTLY ABOVE NORMAL OVER THE
REGION SUN THRU MON, WITH THE COOLEST DAY FOR INTERIOR AREAS ON SUN.
TEMPS ARE EXPECTED TO WARM TO SEVERAL DEGREES ABOVE NORMAL FOR ALL
AREAS ON TUE. [DISC]

Long term. (Wednesday–Saturday) 

.LONG TERM...(WED-SAT) [DISC]

There are some differences in medium range between the EC [European Center for Meteorology (or East Central)] and GFS [Global Forecast System: global spectral model used primarily for aviation weather forecasts; provides guidance out to 384 hours at 00, 06, 12 and 18UTC.], especially Friday and Saturday. There will be an upper level trough approaching Southern California from the N on Wednesday. This inside slider upper trough will pass mostly NE and E of the forecast area on Wednesday, although the southern fringe of the trough will brush by. The EC [European Center for Meteorology (or East Central)] is a bit more progressive with the upper trough, moving it well to the E for Thursday. The GFS [Global Forecast System: global spectral model used primarily for aviation weather forecasts; provides guidance out to 384 hours at 00, 06, 12 and 18UTC.] drops additional energy on the back side of the trough and develops and upper low over Arizona on Thursday and Thursday night, then into northern Baja on Friday before moving it E on Saturday. Both the EC [European Center for Meteorology (or East Central)] and GFS [Global Forecast System: global spectral model used primarily for aviation weather forecasts; provides guidance out to 384 hours at 00, 06, 12 and 18UTC.] keep an upper ridge off the West Coast Thursday and Friday. The EC [European Center for Meteorology (or East Central)] weakens this ridge on Saturday as a broad upper trough moves into the Great Basin, while the GFS [Global Forecast System: global spectral model used primarily for aviation weather forecasts; provides guidance out to 384 hours at 00, 06, 12 and 18UTC.] hangs onto the upper ridge along the West Coast. 

THERE ARE SOME DIFFERENCES IN MEDIUM RANGE BETWEEN THE EC AND GFS,
ESPECIALLY FRI AND SAT. THERE WILL BE AN UPPER LEVEL TROF
APPROACHING SRN CA FROM THE N ON WED. THIS INSIDE SLIDER UPPER TROF
WILL PASS MOSTLY NE AND E OF THE FORECAST AREA ON WED, ALTHO THE SRN
FRINGE OF THE TROF WILL BRUSH BY. THE EC IS A BIT MORE PROGRESSIVE
WITH THE UPPER TROF, MOVING IT WELL TO THE E FOR THU. THE GFS DROPS
ADDITIONAL ENERGY ON THE BACK SIDE OF THE TROF AND DEVELOPS AND
UPPER LOW OVER AZ ON THU AND THU NIGHT, THEN INTO NRN BAJA ON FRI
BEFORE MOVING IT E ON SAT. BOTH THE EC AND GFS KEEP AN UPPER RIDGE
OFF THE W COAST THU AND FRI. THE EC WEAKENS THIS RIDGE ON SAT AS A
BROAD UPPER TROF MOVES INTO THE GREAT BASIN, WHILE THE GFS HANGS
ONTO THE UPPER RIDGE ALONG THE W COAST. [DISC]

Went with a general blend of the two models. Dry conditions will persist over southwestern California through the period. The upper trough passing by late Wednesday and Thursday will impart another Santa Ana wind event which could be quite strong from late Wednesday night through Thursday night. Gusty N winds will affect the Santa Barbara County Mountains and south coast Wednesday evening then transition to NE and gusty over the the wind-prone areas of VTU [Ventura CA]/LA Counties. Winds are projected to be at least advisory levels, with a chance some areas could have warning-level winds. The offshore flow will weaken some but continue Friday into Saturday as well, especially over VTU [Ventura CA]/LA Counties. Skies will be mostly clear through the period with temps generally a few degrees above normal except mostly near normal on Thursday. 

WENT WITH A GENERAL BLEND OF THE TWO MODELS. DRY CONDITIONS WILL
PERSIST OVER SWRN CA THRU THE PERIOD. THE UPPER TROF PASSING BY LATE
WED AND THU WILL IMPART ANOTHER SANTA ANA WIND EVENT WHICH COULD BE
QUITE STRONG FROM LATE WED NIGHT THRU THU NIGHT. GUSTY N WINDS WILL
AFFECT THE SBA COUNTY MTNS AND S COAST WED EVENING THEN TRANSITION
TO NE AND GUSTY OVER THE THE WIND-PRONE AREAS OF VTU/L.A. COUNTIES.
WINDS ARE PROJECTED TO BE AT LEAST ADVISORY LEVELS, WITH A CHANCE
SOME AREAS COULD HAVE WARNING-LEVEL WINDS. THE OFFSHORE FLOW WILL
WEAKEN SOME BUT CONTINUE FRI INTO SAT AS WELL, ESPECIALLY OVER
VTU/L.A. COUNTIES. SKIES WILL BE MOSTLY CLEAR THRU THE PERIOD WITH
TEMPS GENERALLY A FEW DEGREES ABOVE NORMAL EXCEPT MOSTLY NEAR NORMAL
ON THU. [DISC]

Aviation. 17/0050Z [4:50pm PST]

.AVIATION...17/0050Z. [AVIA]

At 23Z [3pm PST], there was a deep moist layer up to around 2750 feet at KLAX [Los Angeles CA]. The top of the inversion was around 3700 feet with a temperature near 11°C. 

AT 23Z, THERE WAS A DEEP MOIST LAYER UP TO AROUND 2750 FEET AT
KLAX. THE TOP OF THE INVERSION WAS AROUND 3700 FEET WITH A
TEMPERATURE NEAR 11 DEGREES CELSIUS. [AVI2]

VFR [Visual Flight Rules] conditions are expected throughout the period, except for a chance of MVFR [Marginal Visual Flight Rules] conditions in smoke at coastal and valley terminals and a chance of VLIFR [Very Low Instrument Flight Rules] to LIFR [Low Instrument Flight Rules] conditions at KPRB [Paso Robles CA]. Periods of moderate to strong wind shear and turbulence are possible at all terminals through 20Z [12pm PST]

VFR CONDITIONS ARE EXPECTED THROUGHOUT THE PERIOD, EXCEPT FOR A
CHANCE OF MVFR CONDITIONS IN SMOKE AT COASTAL AND VALLEY
TERMINALS AND A CHANCE OF VLIFR TO LIFR CONDITIONS AT KPRB.
PERIODS OF MODERATE TO STRONG WIND SHEAR AND TURBULENCE ARE
POSSIBLE AT ALL TERMINALS THROUGH 20Z. [AVI2]

KLAX [Los Angeles CA]… there is a 30% chance of MVFR [Marginal Visual Flight Rules] conditions in smoke at KLAX [Los Angeles CA]. Moderate to strong wind shear and turbulence is expected between 08Z [12am PST] and 20Z [12pm PST]

KLAX...THERE IS A 30 PERCENT CHANCE OF MVFR CONDITIONS IN SMOKE
AT KLAX. MODERATE TO STRONG WIND SHEAR AND TURBULENCE IS EXPECTED
BETWEEN 08Z AND 20Z. [AVI2]

KBUR [Burbank CA]… there is a 20% chance of MVFR [Marginal Visual Flight Rules] conditions in smoke at KLAX [Los Angeles CA]. Moderate to strong wind shear and turbulence is expected between 08Z [12am PST] and 20Z [12pm PST]

KBUR...THERE IS A 20 PERCENT CHANCE OF MVFR CONDITIONS IN SMOKE
AT KLAX. MODERATE TO STRONG WIND SHEAR AND TURBULENCE IS EXPECTED
BETWEEN 08Z AND 20Z. [AVI2]

Marine. 16/8:00pm. 

.MARINE...16/800 PM. [AVIA]

Across the outer waters… gale force NW winds have subsided to Small Craft Advisories (Small Craft Advisory) level, and will continue tonight into Sunday. Large seas consisting of a longer period NW swell and building wind waves will continue through Sunday afternoon before subsiding below 10 feet. There is a 30% chance that seas remain over 10 feet through Sunday evening. The large seas are also affecting PZZ645 and a Small Craft Advisory is in effect for that zone through Sunday morning and may need to be extended into Sunday afternoon. 

ACROSS THE OUTER WATERS... GALE FORCE NW WINDS HAVE SUBSIDED TO SMALL
CRAFT ADVISORIES (SCA) LEVEL, AND WILL CONTINUE TONIGHT INTO
SUNDAY. LARGE SEAS CONSISTING OF A LONGER PERIOD NW SWELL AND
BUILDING WIND WAVES WILL CONTINUE THROUGH SUNDAY AFTERNOON BEFORE
SUBSIDING BELOW 10 FEET. THERE IS A 30 PERCENT CHANCE THAT SEAS
REMAIN OVER 10 FEET THROUGH SUNDAY EVENING. THE LARGE SEAS ARE
ALSO AFFECTING PZZ645 AND A SCA IS IN EFFECT FOR THAT ZONE THROUGH
SUNDAY MORNING...AND MAY NEED TO BE EXTENDED INTO SUNDAY
AFTERNOON. [AVI2]

Across the inner waters south of Point Conception [Santa Barbara CA]… Small Craft Advisory level NE winds are expected from Ventura to anacapa island south to Santa Monica and from San Pedro to Catalina Island late tonight through Sunday. Wind gusts around 25 knots [29 mph] are expected. These winds will create choppy seas and short period wind waves which could affect Avalon and other east facing harbors in the channel islands. 

ACROSS THE INNER WATERS SOUTH OF POINT CONCEPTION... SCA LEVEL NE
WINDS ARE EXPECTED FROM VENTURA TO ANACAPA ISLAND SOUTH TO SANTA
MONICA AND FROM SAN PEDRO TO CATALINA ISLAND LATE TONIGHT THROUGH
SUNDAY. WIND GUSTS AROUND 25 KNOTS ARE EXPECTED. THESE WINDS WILL
CREATE CHOPPY SEAS AND SHORT PERIOD WIND WAVES WHICH COULD AFFECT
AVALON AND OTHER EAST FACING HARBORS IN THE CHANNEL ISLANDS. [AVI2]

There will continue to be areas of smoke from the Thomas fire over portions of the coastal waters, mainly from the waters west of Ventura County through the Santa Barbara Channel and over portions of the outer waters. Visibilities could locally drop to 2 nm [2 miles] or lower at times in the inner waters through Sunday as offshore winds continue. 

THERE WILL CONTINUE TO BE AREAS OF SMOKE FROM THE THOMAS FIRE
OVER PORTIONS OF THE COASTAL WATERS, MAINLY FROM THE WATERS WEST
OF VENTURA COUNTY THROUGH THE SANTA BARBARA CHANNEL AND OVER
PORTIONS OF THE OUTER WATERS. VISIBILITIES COULD LOCALLY DROP TO 2
NM OR LOWER AT TIMES IN THE INNER WATERS THROUGH SUNDAY AS
OFFSHORE WINDS CONTINUE. [AVI2]

Fire weather. 16/2:00pm. 

.FIRE WEATHER...16/200 PM. [AVIA]

Red Flag Warnings in effect until 10pm this evening for the Santa Barbara County Mountains and south coast. A Red Flag Warning is in effect for much of Los Angeles and Ventura Counties through from 9pm tonight to 8pm Sunday. 

RED FLAG WARNINGS IN EFFECT UNTIL 10 PM THIS EVENING FOR THE
SANTA BARBARA COUNTY MOUNTAINS AND SOUTH COAST. A RED FLAG
WARNING IS IN EFFECT FOR MUCH OF LOS ANGELES AND VENTURA COUNTIES
THROUGH FROM 9 PM TONIGHT TO 8 PM SUNDAY. [AVI2]

Strong upper level winds behind the passage of an upper level disturbance combined with strengthening north-south pressure gradients caused a significant increase in winds across the Santa Barbara County Mountains and south coast this morning, causing major impacts on the Thomas fire. The SBA [Santa Barbara CA]-Bakersfield gradient peaked at –6.2 mb this morning. Wind gusts of 35–50 mph were common this morning across these areas, with isolated gusts up to 65 mph observed in the Montecito Hills. While humidities have modified somewhat today, the strong north to northeast winds through this evening will continue to maintain dangerous Red Flag conditions for the Santa Barbara County Mountains and south coast. As a result of these strong winds, there will be very rapid fire spread, long range spotting, and extreme fire behavior observed at the Thomas fire and any new fire ignitions. In addition, there will be gusty north winds across the Ventura County Mountains today, especially near the Highway 33 and I-5 corridors which will impact the Ventura County portion of the Thomas fire. 

STRONG UPPER LEVEL WINDS BEHIND THE PASSAGE OF AN
UPPER LEVEL DISTURBANCE COMBINED WITH STRENGTHENING NORTH-SOUTH
PRESSURE GRADIENTS CAUSED A SIGNIFICANT INCREASE IN WINDS ACROSS
THE SANTA BARBARA COUNTY MOUNTAINS AND SOUTH COAST THIS MORNING,
CAUSING MAJOR IMPACTS ON THE THOMAS FIRE. THE SBA-BAKERSFIELD
GRADIENT PEAKED AT -6.2 MB THIS MORNING. WIND GUSTS OF 35 TO 50
MPH WERE COMMON THIS MORNING ACROSS THESE AREAS, WITH ISOLATED
GUSTS UP TO 65 MPH OBSERVED IN THE MONTECITO HILLS. WHILE
HUMIDITIES HAVE MODIFIED SOMEWHAT TODAY, THE STRONG NORTH TO
NORTHEAST WINDS THROUGH THIS EVENING WILL CONTINUE TO MAINTAIN
DANGEROUS RED FLAG CONDITIONS FOR THE SANTA BARBARA COUNTY
MOUNTAINS AND SOUTH COAST. AS A RESULT OF THESE STRONG WINDS,
THERE WILL BE VERY RAPID FIRE SPREAD, LONG RANGE SPOTTING, AND
EXTREME FIRE BEHAVIOR OBSERVED AT THE THOMAS FIRE AND ANY NEW FIRE
IGNITIONS. IN ADDITION, THERE WILL BE GUSTY NORTH WINDS ACROSS
THE VENTURA COUNTY MOUNTAINS TODAY, ESPECIALLY NEAR THE HIGHWAY 33
AND INTERSTATE 5 CORRIDORS WHICH WILL IMPACT THE VENTURA COUNTY
PORTION OF THE THOMAS FIRE. [AVI2]

For the remainder of Ventura and Los Angeles Counties, the Santa Ana winds are expected to begin this evening, then peak overnight into Sunday morning when gusts between 35 and 55 mph will be likely. A Red Flag Warning is in effect for tonight through Sunday evening for much of Los Angeles and Ventura Counties. There is the potential for another round of gusty sundowner winds Wednesday into early Thursday, another period of sundowner winds will be possible for Santa Barbara County from Wednesday into Wednesday night, followed by a potential extended period of Santa Ana winds Thursday into next weekend. 

FOR THE REMAINDER OF VENTURA AND LOS ANGELES COUNTIES, THE SANTA
ANA WINDS ARE EXPECTED TO BEGIN THIS EVENING, THEN PEAK OVERNIGHT
INTO SUNDAY MORNING WHEN GUSTS BETWEEN 35 AND 55 MPH WILL BE
LIKELY. A RED FLAG WARNING IS IN EFFECT FOR TONIGHT THROUGH SUNDAY
EVENING FOR MUCH OF LOS ANGELES AND VENTURA COUNTIES. THERE IS THE
POTENTIAL FOR ANOTHER ROUND OF GUSTY SUNDOWNER WINDS WEDNESDAY
INTO EARLY THURSDAY, ANOTHER PERIOD OF SUNDOWNER WINDS WILL BE
POSSIBLE FOR SANTA BARBARA COUNTY FROM WEDNESDAY INTO WEDNESDAY
NIGHT, FOLLOWED BY A POTENTIAL EXTENDED PERIOD OF SANTA ANA WINDS
THURSDAY INTO NEXT WEEKEND. [AVI2]

LOX [Los Angeles/Oxnard CA] Watches/Warnings/Advisories

.LOX WATCHES/WARNINGS/ADVISORIES...
CA...HIGH SURF ADVISORY IN EFFECT UNTIL 9 AM PST SUNDAY FOR ZONES
34-35. (SEE LAXCFWLOX).
WIND ADVISORY IN EFFECT UNTIL 10 PM PST THIS EVENING FOR
ZONES 39-52. (SEE LAXNPWLOX).
WIND ADVISORY IN EFFECT UNTIL 3 PM PST SUNDAY FOR ZONES
40-41-44>46-53-54-88-547. (SEE LAXNPWLOX).
RED FLAG WARNING IN EFFECT UNTIL 10 PM PST THIS EVENING FOR
ZONES 239-252. (SEE LAXRFWLOX).
RED FLAG WARNING IN EFFECT FROM 1 AM TO 8 PM PST SUNDAY FOR
ZONES 240-241. (SEE LAXRFWLOX).
RED FLAG WARNING IN EFFECT UNTIL 8 PM PST SUNDAY FOR ZONES
244>246-253-254-288-547-548. (SEE LAXRFWLOX).
PZ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM PST SUNDAY FOR
ZONE 645. (SEE LAXMWWLOX).
SMALL CRAFT ADVISORY IN EFFECT UNTIL 3 PM PST SUNDAY FOR
ZONES 650-655-670-673-676. (SEE LAXMWWLOX). [WARN]

Hazard potential outlook… (Tuesday–Sat) critical fire weather conditions are possible with gusty sundowner winds Wednesday night and gusty offshore winds Thursday and Friday. 

.HAZARD POTENTIAL OUTLOOK...(TUE-SAT)
CRITICAL FIRE WEATHER CONDITIONS ARE POSSIBLE WITH GUSTY
SUNDOWNER WINDS WEDNESDAY NIGHT AND GUSTY OFFSHORE WINDS
THURSDAY AND FRIDAY. [DISC]

Public: Hall/Sirard; Aviation: Hall; Marine: Smith; Fire Weather: Gomberg; Synopsis: KJ 

PUBLIC...HALL/SIRARD
AVIATION...HALL
MARINE...SMITH
FIRE WEATHER...GOMBERG
SYNOPSIS...KJ [CRED]
WEATHER.GOV/LOSANGELES [LINK]

Point Forecast

Montara CA

17 Dec 1:55am PST

Overnight Mostly clear, with a low around 48°. Breezy, with a north wind around 26 mph, with gusts as high as 34 mph.
Sunday Sunny, with a high near 63°. NNE wind 9 to 14 mph, with gusts as high as 18 mph.
Sunday Night Mostly clear, with a low around 47°. East wind 6 to 11 mph.
Monday Sunny, with a high near 63°. Calm wind becoming north around 5 mph in the morning.
Monday Night Partly cloudy, with a low around 47°. East wind 3 to 7 mph.
Tuesday Mostly sunny, with a high near 62°.
Tuesday Night Mostly cloudy, with a low around 49°.
Wednesday A slight chance of showers. Partly sunny, with a high near 59°.
Wednesday Night Partly cloudy, with a low around 46°.
Thursday Mostly sunny, with a high near 61°.
Thursday Night Mostly clear, with a low around 46°.
Friday Mostly sunny, with a high near 62°.
Friday Night Partly cloudy, with a low around 47°.
Saturday Mostly sunny, with a high near 62°.
Overnight
Mostly clear, with a low around 48. Breezy, with a north wind around 26 mph, with gusts as high as 34 mph.
Sunday
Sunny, with a high near 63. North northeast wind 9 to 14 mph, with gusts as high as 18 mph.
Sunday Night
Mostly clear, with a low around 47. East wind 6 to 11 mph.
Monday
Sunny, with a high near 63. Calm wind becoming north around 5 mph in the morning.
Monday Night
Partly cloudy, with a low around 47. East wind 3 to 7 mph.
Tuesday
Mostly sunny, with a high near 62.
Tuesday Night
Mostly cloudy, with a low around 49.
Wednesday
A slight chance of showers. Partly sunny, with a high near 59.
Wednesday Night
Partly cloudy, with a low around 46.
Thursday
Mostly sunny, with a high near 61.
Thursday Night
Mostly clear, with a low around 46.
Friday
Mostly sunny, with a high near 62.
Friday Night
Partly cloudy, with a low around 47.
Saturday
Mostly sunny, with a high near 62.

This page is generated dynamically from the National Weather Service's NWS point forecast and Area Forecast Discussion, reformatted for readability. NWS glossary; about point forecasts. For more information, visit the Lobitos Weather Project home page. Comments and corrections are welcome: