Area Forecast Discussion FXUS66 KLOX [Los Angeles/Oxna CA] 291700 AFDLOX ∨ FXUS66 KLOX 291700 AFDLOX [HEAD] National Weather Service Los Angeles/Oxnard California 9:00am PST Fri Nov 29 2024 ∨ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA 900 AM PST FRI NOV 29 2024 [HEAD] Synopsis. 29/2:22am. ∨ .SYNOPSIS...29/222 AM. [DISC] Dry weather with varying amounts of high clouds is expected through at least next Thursday. There will locally breezy canyon winds during the night and morning hours. Temperatures will trend upwards and reach warmer than normal by the weekend. ∨ DRY WEATHER WITH VARYING AMOUNTS OF HIGH CLOUDS IS EXPECTED THROUGH AT LEAST NEXT THURSDAY. THERE WILL LOCALLY BREEZY CANYON WINDS DURING THE NIGHT AND MORNING HOURS. TEMPERATURES WILL TREND UPWARDS AND REACH WARMER THAN NORMAL BY THE WEEKEND. [DISC] Short term (today–Sun)… 29/8:59am. ∨ .SHORT TERM (TDY-SUN)...29/859 AM. [DISC] update ∨ ***UPDATE*** [DISC] Upper level ridging will move into Southern California through this afternoon. Extensive high clouds were moving through the ridge and into the area from the E Pacific this morning. Varying amounts of high clouds are expected to persist through the afternoon which will result in mostly cloudy skies across the region. ∨ UPPER LEVEL RIDGING WILL MOVE INTO SRN CA THRU THIS AFTERNOON. EXTENSIVE HI CLOUDS WERE MOVING THRU THE RIDGE AND INTO THE AREA FROM THE E PAC THIS MORNING. VARYING AMOUNTS OF HI CLOUDS ARE EXPECTED TO PERSIST THRU THE AFTERNOON WHICH WILL RESULT IN MOSTLY CLOUDY SKIES ACROSS THE REGION. [DISC] Good offshore pressure gradients to the E and N this morning (-5.4 mb LAX [Los Angeles CA]-DAG [Barstow/Daggett CA] and –3.5 mb LAX [Los Angeles CA]-BFL [Bakersfield CA] at 16Z [8am PST]) were contributing to breezy to gusty NE winds over the usual wind-prone areas of VTU [Ventura CA]/LA Counties as well as portions of SLO [San Luis Obispo CA]/Santa Barbara Counties including the Santa Lucia Range. The strongest winds were in and around the Santa Susanna Mountains where local gusts between 40 and 50 mph were noted. The offshore winds will gradually diminish through this afternoon, with some seabreezes developing near the coast by mid afternoon if not sooner as offshore gradients relax. ∨ GOOD OFFSHORE PRESSURE GRADIENTS TO THE E AND N THIS MORNING (-5.4 MB LAX-DAG AND -3.5 MB LAX-BFL AT 16Z) WERE CONTRIBUTING TO BREEZY TO GUSTY NE WINDS OVER THE USUAL WIND-PRONE AREAS OF VTU/L.A. COUNTIES AS WELL AS PORTIONS OF SLO/SBA COUNTIES INCLUDING THE SANTA LUCIA RANGE. THE STRONGEST WINDS WERE IN AND AROUND THE SANTA SUSANNA MTNS WHERE LOCAL GUSTS BETWEEN 40 AND 50 MPH WERE NOTED. THE OFFSHORE WINDS WILL GRADUALLY DIMINISH THRU THIS AFTERNOON, WITH SOME SEABREEZES DEVELOPING NEAR THE COAST BY MID AFTERNOON IF NOT SOONER AS OFFSHORE GRADIENTS RELAX. [DISC] Temps today with the offshore flow and upper level ridging will be several degrees above normal for many areas despite the high clouds. The warmest inland coast and valleys should reach the 70s, while the deserts and SLO [San Luis Obispo CA]/Santa Barbara County interior valleys remain cool in the lower to mid 60s. ∨ TEMPS TODAY WITH THE OFFSHORE FLOW AND UPPER LEVEL RIDGING WILL BE SEVERAL DEGREES ABOVE NORMAL FOR MANY AREAS DESPITE THE HIGH CLOUDS. THE WARMEST INLAND COAST AND VLYS SHOULD REACH THE 70S, WHILE THE DESERTS AND SLO/SBA COUNTY INTERIOR VLYS REMAIN COOL IN THE LOWER TO MID 60S. [DISC] from previous discussion ∨ ***FROM PREVIOUS DISCUSSION*** [DISC] Very benign weather on tap for the short term (and the long term as well). A weak ridge will sit atop Southern California today. It will flatten out on Saturday and then be replaced by a weak high height trough. At the surface offshore flow will continue especially in the mornings and especially from the north. ∨ VERY BENIGN WEATHER ON TAP FOR THE SHORT TERM (AND THE LONG TERM AS WELL). A WEAK RIDGE WILL SIT ATOP SRN CA TODAY. IT WILL FLATTEN OUT ON SATURDAY AND THEN BE REPLACED BY A WEAK HIGH HGT TROF. AT THE SFC OFFSHORE FLOW WILL CONTINUE ESP IN THE MORNINGS AND ESP FROM THE NORTH. [DISC] It will be a mostly cloudy day today and Saturday as plenty of mid and high level clouds stream through the ridge after being spun off a sub tropical moisture stream. Skies will clear Sunday as the cloud mass pushes down and away from the area. ∨ IT WILL BE A MOSTLY CLOUDY DAY TODAY AND SATURDAY AS PLENTY OF MID AND HIGH LEVEL CLOUDS STREAM THROUGH THE RIDGE AFTER BEING SPUN OFF A SUB TROPICAL MOISTURE STREAM. SKIES WILL CLEAR SUNDAY AS THE CLOUD MASS PUSHES DOWN AND AWAY FROM THE AREA. [DISC] The offshore push will allow for some ridgetop and canyon winds each night through morning. There will be some local gusts in the 35–45 mph range across the ridgetops but for the most part the winds will be between 15–25 mph. ∨ THE OFFSHORE PUSH WILL ALLOW FOR SOME RIDGETOP AND CANYON WINDS EACH NIGHT THROUGH MORNING. THERE WILL BE SOME LOCAL GUSTS IN THE 35 TO 45 MPH RANGE ACROSS THE RIDGETOPS BUT FOR THE MOST PART THE WINDS WILL BE BETWEEN 15 TO 25 MPH. [DISC] Despite the cloud cover the rising heights and offshore flow will bring 2–4° of warming to most of the area today and 1–3° of additional warming on Saturday. A few coastal areas may buck this trend and cool a degree or two due to subtle changes in the seabreeze. Saturday's highs will mostly be in the 70s and lower 80s across the CSTS/valleys or 4–8 locally 10° above normal. Max temps will cool 2–4° across the CSTS/valleys on Sunday as the offshore flow weakens. ∨ DESPITE THE CLOUD COVER THE RISING HGTS AND OFFSHORE FLOW WILL BRING 2 TO 4 DEGREES OF WARMING TO MOST OF THE AREA TODAY AND 1 TO 3 DEGREES OF ADDITIONAL WARMING ON SATURDAY. A FEW COASTAL AREAS MAY BUCK THIS TREND AND COOL A DEGREE OR TWO DUE TO SUBTLE CHANGES IN THE SEABREEZE. SATURDAY`S HIGHS WILL MOSTLY BE IN THE 70S AND LOWER 80S ACROSS THE CSTS/VLYS OR 4 TO 8 LOCALLY 10 DEGREES ABOVE NORMAL. MAX TEMPS WILL COOL 2 TO 4 DEGREES ACROSS THE CSTS/VLYS ON SUNDAY AS THE OFFSHORE FLOW WEAKENS. [DISC] Long term (Monday–Thursday)… 29/3:05am. ∨ .LONG TERM (MON-THU)...29/305 AM. [DISC] 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.] as well as their respective ensemble means are in good agreement for the extend period. The period of benign weather is expected to continue well into next week. ∨ THE EC AND GFS AS WELL AS THEIR RESPECTIVE ENSEMBLE MEANS ARE IN GOOD AGREEMENT FOR THE XTND PERIOD. THE PERIOD OF BENIGN WEATHER IS EXPECTED TO CONTINUE WELL INTO NEXT WEEK. [DISC] A high amplitude long wave pattern develop across the entire CONUS [Continental US] with a significant ridge over the the western third of nation. A high height upper low will develop under the ridge and spin harmlessly over Southern California for the duration of the period. ∨ A HIGH AMPLITUDE LONG WAVE PATTERN DEVELOP ACROSS THE ENTIRE CONUS WITH A SIGNIFICANT RIDGE OVER THE THE WESTERN THIRD OF NATION. A HIGH HGT UPPER LOW WILL DEVELOP UNDER THE RIDGE AND SPIN HARMLESSLY OVER SRN CA FOR THE DURATION OF THE PERIOD. [DISC] The offshore flow will continue through the period although it will not be strong enough to generate advisory level winds. It may not be strong enough to prevent some morning low clouds across southern LA County or western Santa Barbara County. ∨ THE OFFSHORE FLOW WILL CONTINUE THROUGH THE PERIOD ALTHOUGH IT WILL NOT BE STRONG ENOUGH TO GENERATE ADVISORY LEVEL WINDS. IT MAY NOT BE STRONG ENOUGH TO PREVENT SOME MORNING LOW CLOUDS ACROSS SOUTHERN LA COUNTY OR WESTERN SBA COUNTY. [DISC] Max temps will only vary by a couple of degrees in either direction each day as heights and surface pressure gradients change little through the period. ∨ MAX TEMPS WILL ONLY VARY BY A COUPLE OF DEGREES IN EITHER DIRECTION EACH DAY AS HGTS AND SFC PRESSURE GRADIENTS CHANGE LITTLE THROUGH THE PERIOD. [DISC] Aviation. 29/1133Z [3:33am PST]. ∨ .AVIATION...29/1133Z. [AVIA] At 11Z [3am PST] at KLAX [Los Angeles CA], there was no marine layer or inversion. ∨ AT 11Z AT KLAX, THERE WAS NO MARINE LAYER OR INVERSION. [AVI2] Gusty winds will affect the mountains and valleys of Los Angeles and Ventura Counties, and the Ventura County coastal plain this morning, with some low-level wind shear and up and down drafts. For the individual TAF [Terminal Aerodrome Forecast] sites, winds should mainly remain under 10 kts [12 mph], except at KOXR [Oxnard CA], KCMA [Camarillo CA], KVNY [Van Nuys CA]. Timing of wind shifts could be off a couple hours. ∨ GUSTY WINDS WILL AFFECT THE MTNS AND VALLEYS OF L.A. AND VTU COUNTIES, AND THE VENTURA COUNTY COASTAL PLAIN THIS MORNING, WITH SOME LLWS AND UDDF. FOR THE INDIVIDUAL TAF SITES, WINDS SHOULD MAINLY REMAIN UNDER 10 KTS, EXCEPT AT KOXR, KCMA, KVNY. TIMING OF WIND SHIFTS COULD BE OFF A COUPLE HOURS. [AVI2] Otherwise, high confidence in VFR [Visual Flight Rules] conditions through the period. ∨ OTHERWISE, HIGH CONFIDENCE IN VFR CONDS THRU THE PERIOD. [AVI2] KLAX [Los Angeles CA]… high confidence in TAF [Terminal Aerodrome Forecast] with VFR [Visual Flight Rules] conditions through the period. There is a 20% chance of an east wind component of 5–10 kt [6–12 mph] through 17Z [9am PST]. ∨ KLAX...HIGH CONFIDENCE IN TAF WITH VFR CONDS THRU THE PD. THERE IS A 20% CHANCE OF AN EAST WIND COMPONENT OF 5-10 KT THRU 17Z. [AVI2] KBUR [Burbank CA]… high confidence in TAF [Terminal Aerodrome Forecast] with VFR [Visual Flight Rules] conditions through the period. There is a 20% chance of NE winds 10–15 kt [12–17 mph] with gusts 25 kt [29 mph] 14Z [6am PST]-20Z [12pm PST]. ∨ KBUR...HIGH CONFIDENCE IN TAF WITH VFR CONDS THRU THE PD. THERE IS A 20% CHANCE OF NE WINDS 10-15 KT WITH GUSTS 25 KT 14Z-20Z. [AVI2] Marine. 29/8:54am. ∨ .MARINE...29/854 AM. [AVIA] For the outer waters, high confidence that winds and seas will remain below Small Craft Advisory (Small Craft Advisory) levels through Tuesday night. ∨ FOR THE OUTER WATERS, HIGH CONFIDENCE THAT WINDS AND SEAS WILL REMAIN BELOW SMALL CRAFT ADVISORY (SCA) LEVELS THRU TUE NIGHT. [AVI2] For the inner waters, localized Small Craft Advisory level wind gusts are expected nearshore from Oxnard to north of Santa Monica, but decreasing to just below advisory levels out to anacapa island this morning. There is a a 40–50% chance of wind gusts increasing to 25 kt [29 mph] again for the same areas this evening into Saturday morning, but not widespread enough to warrant an advisory. Otherwise, Small Craft Advisory conditions are not expected through Tuesday night. ∨ FOR THE INNER WATERS, LOCALIZED SCA LEVEL WIND GUSTS ARE EXPECTED NEARSHORE FROM OXNARD TO NORTH OF SANTA MONICA, BUT DECREASING TO JUST BELOW ADVISORY LEVELS OUT TO ANACAPA ISLAND THIS MORNING. THERE IS A A 40-50% CHANCE OF WIND GUSTS INCREASING TO 25 KT AGAIN FOR THE SAME AREAS THIS EVENING INTO SATURDAY MORNING, BUT NOT WIDESPREAD ENOUGH TO WARRANT AN ADVISORY. OTHERWISE, SCA CONDS ARE NOT EXPECTED THRU TUE NIGHT. [AVI2] LOX [Los Angeles/Oxnard CA] Watches/Warnings/Advisories
.LOX WATCHES/WARNINGS/ADVISORIES... CA...NONE. PZ...SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM PST THIS MORNING FOR ZONES 650-655. (SEE LAXMWWLOX). [WARN] Public: Rorke/Sirard; Aviation: DB; Marine: DB/Lund; Synopsis: Sirard ∨ PUBLIC...RORKE/SIRARD AVIATION...DB MARINE...DB/LUND SYNOPSIS...SIRARD [CRED] WEATHER.GOV/LOSANGELES [LINK] EXPERIMENTAL GRAPHICAL HAZARDOUS WEATHER OUTLOOK AT: HTTPS://WWW.WEATHER.GOV/ERH/GHWO?WFO=LOX [LINK] |
Point Forecast Los Angeles CA 29 Nov 09:40am PST Today Mostly cloudy, with a high near 75°. North wind around 5 mph becoming WSW in the afternoon. Tonight Partly cloudy, with a low around 54°. WSW wind around 5 mph becoming NNE in the evening. Saturday Partly sunny, with a high near 76°. ESE wind around 5 mph becoming WSW in the morning. Saturday Night Mostly cloudy, with a low around 54°. West wind around 5 mph becoming ENE in the evening. Sunday Mostly sunny, with a high near 74°. Calm wind. Sunday Night Mostly clear, with a low around 52°. Monday Mostly sunny, with a high near 74°. Monday Night Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 53°. Tuesday Patchy fog before 10am. Otherwise, partly sunny, with a high near 72°. Tuesday Night Partly cloudy, with a low around 51°. Wednesday Sunny, with a high near 73°. Wednesday Night Mostly clear, with a low around 51°. Thursday Sunny, with a high near 74°. Today Mostly cloudy, with a high near 75. North wind around 5 mph becoming west southwest in the afternoon. Tonight Partly cloudy, with a low around 54. West southwest wind around 5 mph becoming north northeast in the evening. Saturday Partly sunny, with a high near 76. East southeast wind around 5 mph becoming west southwest in the morning. Saturday Night Mostly cloudy, with a low around 54. West wind around 5 mph becoming east northeast in the evening. Sunday Mostly sunny, with a high near 74. Calm wind. Sunday Night Mostly clear, with a low around 52. Monday Mostly sunny, with a high near 74. Monday Night Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 53. Tuesday Patchy fog before 10am. Otherwise, partly sunny, with a high near 72. Tuesday Night Partly cloudy, with a low around 51. Wednesday Sunny, with a high near 73. Wednesday Night Mostly clear, with a low around 51. Thursday Sunny, with a high near 74. |
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