Pacific Storm & Surf Forecast (Stormsurf)

Buoy 238 (Barbers Pt)/Buoy 239 (Lani): Seas were 4.3 ft @ 11.8 secs with swell 3.2 ft @ 9.3 secs from 268 degrees. Water temp 77.9 degs (Barbers Pt), 77.5 (Pearl Harbor 233), 77.9 (Lani 239).
Buoy 106 (Waimea): Seas were 7.2 ft @ 14.3 secs with swell 5.0 ft @ 14.2 secs from 334 degrees. Water temp 78.3 degs.
Buoy 46025 (Catalina RDG): Seas were 1.5 ft @ 13.7 secs with swell 0.9 ft @ 13.9 secs from 244 degrees. Wind north at 2-4 kts. Water temperature 59.2 degs, 57.9 (Topanga 103), 58.1 degs (Long Beach 215), 59.5 (Oceanside Offshore 045), 57.9 (Del Mar 153), 59.7 (Torrey Pines Outer 100). At Harvest Buoy (071) primary swell was 1.4 ft @ 14.7 secs from 232 degrees. At Santa Monica (028) swell was 1.0 ft @ 13.6 secs from 230 degrees. At Oceanside (045) swell was 1.0 ft @ 13.7 secs from 210 degrees. Southward at Pt Loma (191) swell was 1.2 ft @ 13.4 secs from 213 degrees. Water temperate was 58.6 degrees.
Buoy 46012 (Half Moon Bay)/029 (Pt Reyes): Seas were 3.3 ft @ 14.3 secs with swell 1.7 ft @ 13.8 secs from 249 degrees. Wind north-northeast at 12-14 kts. Water temp 52.2 (Bodega Bay 46013), 52.9 degs (Pt Reyes 029), 52.7 (San Francisco 46026), 51.6 (SF Bar 142), 53.8 (Pt Santa Cruz 254) and NA (Monterey Bay 46042).

PACIFIC OVERVIEW
Current Conditions
On Sunday (12/18) North and Central CA had sets at thigh to maybe waist high and clean with good form but weak. Protected breaks were flat to thigh high and clean and very soft. At Santa Cruz surf was thigh to waist high and clean and soft. In Southern California/Ventura waves were flat and clean. Central Orange County had sets at thigh high and clean and lined up but soft and inconsistent. South Orange County's best summertime breaks had some waist high sets and super clean and lined up when they came on occasion. North San Diego had sets at thigh high and clean and lined up but soft. Hawaii's North Shore had sets at 3 ft overhead and lined up and clean. The South Shore had some waist high plus south windswell and fairly clean early. The East Shore was getting northerly swell at 1-2 ft overhead and clean early with light south winds.

See QuikCASTs for the 5 day surf overview or read below for the detailed view.

Meteorological Overview
On Sunday (12/18) Hawaii was getting fading swell from a gale that was over the Dateline Tues-Fri (12/16) producing up to 33 ft seas aimed southeast. California was getting nothing. Secondary gale energy is to develop over the Dateline falling southeast Sun-Tues (12/20) producing up to 32 ft seas falling southeast and pushing directly over Hawaii bringing weather there. And another broad gale is to develop just off the Kuril Islands easing east filling the area to the dateline Sun-Tues (12/20) with up to 40 ft seas initially. Secondary energy from that system is to push east and develop into multiple small gales over the Western Gulf tracking northeast with the first on Thurs (12/22) with 37 ft seas aimed east and another on Fri-Sat (12/24) with 40 ft seas. And a broad area of disturbed weather to follow in the Gulf and west of the dateline offering more potential into the Holidays. There's more hope.

SHORT- TERM FORECAST
Current marine weather and wave analysis plus forecast conditions for the next 72 hours

Overview
Jetstream
On Sunday (12/18) the jetstream was consolidated pushing strongly northeast off Japan at 210 kts then falling southeast at 180 kts forming a developing trough northwest of Hawaii offering good support for gale development. East of there the jet was weak and offering no support for weather development. Over the next 72 hours the Hawaiian trough is to fall southeast while pinching with it's apex sweeping over the Islands on Tues (12/20) producing weather and raw swell there. And winds are to still be near 170 kts pushing east off Japan and over the dateline but not forming another trough yet. Beyond 72 hours winds are to again start pulsing off Japan reaching 190 kts on Thurs (12/22) producing another trough north of Hawaii offering good support for gale development with the trough lifting northeast Fri-Sat (12/24) likely producing something there. Back to the west the jet is to remain consolidated with winds 190-200 kts by Sat (12/24) pushing flat east over the dateline and starting to carve out a trough in the Central Gulf by Sun (12/25) again supporting gale development. In fact, at that time the jet is to be consolidated over almost the entire North Pacific running east on the 35N latitude line possibly setting up good thing beyond. At last it looks like Winter is starting.

Surface Analysis
On Sunday (12/18) swell was fading from a gale that developing over the dateline with all fetch aimed south at Hawaii (see Dateline Gale below).

Over the next 72 hours raw swell is expected to develop in Hawaii from a local gale developing northwest of the Islands falling south (see Local Hawaiian Gale below).

Local Hawaiian Gale
A gale started developing 800 nmiles northwest of Hawaii on Sat AM (12/17) producing 30-35 kt northwest winds and seas building from 19 ft at 39N 170EW aimed southeast. In the evening northwest winds started building to 40 kts over the dateline falling southeast with seas 26 ft at 37.5N 179.75W aimed southeast directly at Hawaii. On Sun AM (12/18) a broad fetch of northwest winds at 35-40 kts was east of the dateline falling southeast with seas 28 ft at 32.75N 174.5W aimed southeast. The gale is to continue falling southeast in the evening 7500 nmiles northwest of Hawaii with 35-45 kt north winds almost reaching the Islands and seas 30 ft at 35N 165W aimed south. On Mon AM (12/19) 35-40 kt northwest winds are to be 700 nmiles northwest of Hawaii with 30 kt northwest winds reaching Kauai and 32 ft seas at 31.5N 165W aimed southeast with 20 ft seas poised to impact Kauai. In the evening fetch is to be fading from 30-35 kts northwest of Hawaii and 25 kt northwest winds over the Islands and seas 28 ft at 26.5N 163W aimed southeast and 18-19 ft seas impacting Oahu and Kauai. On Tues AM (12/20) 25-30 kt northwest winds are to be over the Islands with 24 ft seas at 25N 160W aimed southeast and 20-22 ft seas impacting Kauai. In the evening the gale is to be dissipating just 200 nmiles north of Hawaii with 22 ft seas now just northeast of the Islands and fading.

Oahu: Likely raw windblown northwest swell is arrive Mon (12/19) in the afternoon building to 10 ft @ 13-14 secs at sunset (12 ft). On Tues AM (12/20) swell is to be 11.9 ft @ 15 secs and holding all day if not building slightly (15 ft). Wind west at 25 kts strongest early. Swell is to be fading Wed AM (12/21) from 8.9 ft @ 13 secs (10 ft). West winds fading to 5 kts later in the day. Residuals on Thurs (12/22) fading from 4.4 ft @ 11 secs early (4.5 ft). Southwest wind 5-10 kts all day. Swell Direction: 315-320 degrees

Dateline Gale
On Tues PM (12/13) a gale started developing over the dateline producing 40-45 kt north winds with seas building from 24 ft at 41N 180W aimed southeast. On Wed AM (12/14) the gale was lifting northeast just east of the dateline with a broad area of 45 kt north winds and seas 31 ft at 41.5N 173W aimed southeast at Hawaii. In the evening the gale is to be over the Northwestern Gulf with 40-45 kt north winds sagging south of there a little bit and seas 33 ft at 42.5N 171W aimed southeast targeting Hawaii well. On Thurs AM (12/15) the gale is to be fading but still producing north winds at 40 kts stationary well northwest of Hawaii with seas 29 ft at 42N 172W aimed south. The gale to be fading in the evening with 30-35 kt north winds falling south with seas 24 ft at 40N 172W targeting Hawaii. The gale is to be gone after that. Something to monitor.

Oahu: Residuals on Sun (12/18) fading from 5.7 ft @ 13 secs (7.5 ft). Swell Direction: 325-330 degrees

Tropical Update
No tropical systems of interest are being monitored at this time.

Mon AM (12/19) northwest winds are forecast at 5 kts for North and Central CA early. Winds turning calm in the afternoon all locations.
Tues AM (12/20) south winds are forecast at 1-5 kts for North CA early and northwest 5 kts for Central CA with dead aimed on between. In the afternoon south winds are forecast for North CA at 5-10 kts with weak low pressure lifting north off Cape Mendocino and northwest winds 10-15 kts for Central CA. Light rain for Cape Mendocino in the afternoon building south to Pt Arena overnight.
Wed AM (12/21) west to northwest winds are forecast at 5-10 kts for North CA early and up to 15 kts for Cape Mendocino and northwest 10-15 kts from Monterey Bay southward. In the afternoon northwest winds are forecast at 5-10 kts for North CA and northwest 10-15 kts for Central CA mainly south of Monterey Bay. Light rain for North CA north of Bodega Bay fading through the day. A weather wall will set up about 600 nmiles off the US West Coast, with stormy wet conditions west of that point and light winds and mostly dry air east of that point.
Thurs AM (12/22) northwest winds are forecast at 10 kts early for North CA and 10-15 kts for Central CA mainly south of Monterey Bay. No change in the afternoon. No precip forecast.
Fri AM (12/23) southwest winds are forecast at 5-10 kts for North CA early and northwest 15 kts south of Monterey Bay. No change in the afternoon. Light rain for Cape Mendocino mainly early.
Sat AM (12/24) light winds are forecast for Cape Mendocino with northwest winds 10 kts for the remainder of North CA and near 15 kts south of Carmel. In the afternoon northwest winds are forecast at 5-10 kts for North Ca and 10 kts for Central CA.
Sun AM (12/25) south winds are forecast at 5-10 kts for Cape Mendocino and northeast at 5-10 kts for Central CA. In the afternoon a gale is to be just off Cape Mendocino with south winds 20 kts. Light winds are forecast for the remainder of North and Central CA. No precip forecast.

Total snow accumulation for the next 10 days respectively for Squaw Valley, Sugar Bowl, Kirkwood and Mammoth are projected at 40, 46, 35, and 33 inches forecast all on Tues(12/27).

Freezing level for Lake Tahoe is 7,500 ft through (12/21) then rising to 12,000 ft (12/22-12/26) then falling to around 8,000 ft beyond. A warm dry Christmas looks possibly, but with weather just beyond.

Tioga Pass/Pacific Crest Trail intersection forecast: Temps - Freeze Level
More locations here (scroll down to 'Resort Snow Forecasts>Central CA or North CA Caltrans & Backcountry')

Overview
Surface Analysis
No swell producing fetch has occurred with no swell in the water or radiating towards the coast.

LONG-TERM FORECAST
Marine weather and forecast conditions 3-10 days into the future

Beyond 72 hours a gale is forecast developing just off the Kuril Islands on Sun PM (12/18) producing west winds at 50 kts with seas 40 ft over a tiny area at 46N 156.5E aimed east. On Mon AM (12/19) the gale is to ease east with 45 kt west winds and seas 40 ft at 49N 163.75E aimed east. In the evening northwest winds to start building in coverage streaming off the Kurils to almost the dateline at 30-35 kts with seas 32 ft at 48.25N 166E aimed east. On Tues AM (12/20) northwest winds are to be fading from 30+ kts streaming east off the Kurils with seas 25 ft at 45N 173E aimed east. The gale is to fade from there. Possibly long distance swell to result for Hawaii and the US West Coast.

A tiny gale is to develop in the far Western Gulf on Thurs AM (12/22) producing 50 kt west winds over a tiny area and seas 30 ft at 42N 167W aimed east. in the evening the gale is to lifting gently north with 45 kts west winds and seas 32 ft at 42N 164W aimed east. on Fri AM (12/23) fetch is to be fading from 40 kts from the west with seas 27 ft at 43.75N 162.25W aimed east. The gale to fade out from there.

On Fri PM (12/23) another gael is to develop in the Central Gulf with 50-55kt west winds and seas 36 ft over a tiny area at 42.75N 144.75W aimed east. On Sat AM (12/24) the storm is to race north with 55kt west winds off British Columbia with 39 ft seas at 48.75N 141.75W aimed east. In the evening the gale is to off Alaska and of no interest to the US mainland anymore.

On Sat AM (12/24) another gale is to be developing just off Japan with 35-40 kts west winds tracking east with seas peaking in the evening at 28 ft at 35N 160E aimed east.

And multiple spurious pockets of 20+ ft seas are to be scattered over the area from the dateline to the Eastern Gulf. Much small 13 secs period swell is possibly to result for Hawaii and the US West Coast.

Upwelling Collapsing
Weak West Wind Anomaly Pattern Getting Established Up over KWGA
Cool subsurface water volume peaked under the equatorial Pacific on 10/15/21, faded in May and June 2022, but rebuilt in late July and hold till mid-Nov, then started to retreat east. La Nina conditions are in control at the oceans surface but appear to be weakening while the foundations of it subsurface collapse. And atmospherically anomalous Westerly Winds are getting weakly established over the KWGA and are forecast to continue for the foreseeable future, with a total collapse of La Nina near Christmas with water temps steadily rising beyond. The last link in the chain is to see SSTs actually rising and the SOI falling.The outlook is turning optimistic.

MJO/ENSO Discussion
The Madden Julian Oscillation (MJO) is a periodic weather cycle that tracks east along the equator circumnavigating the globe. It is characterized in it's Inactive Phase by enhanced trade winds and dry weather over the part of the equator it is in control of, and in it's Active Phase by slackening if not an outright reversing trade winds while enhancing precipitation. The oscillation occurs in roughly 20-30 day cycles (Inactive for 20-30 days, then Active for 20-30 days) over any single location on the planet, though most noticeable in the Pacific. During the Active Phase in the Pacific the MJO tends to support the formation of stronger and longer lasting gales resulting in enhanced potential for the formation of swell producing storms. Prolonged and consecutive Active MJO Phases in the Pacific help support the formation of El Nino. During the Inactive Phase the jet stream tends to split resulting in high pressure and less potential for swell producing storm development. Wind anomalies in the Kelvin Wave Generation Area (KWGA) are key for understanding what Phase the MJO is in over the Pacific. The KWGA is located on the equator from 135E-170W and 5 degs north and south (or on the equator from New Guinea east to the dateline). West wind anomalies in the KWGA suggest the Active Phase of the MJO in the Pacific, and east anomalies suggests the Inactive Phase. In turn the Active Phase strengthens and the Inactive Phase weakens the jetstream, which in turn enhances or dampens storm production respectively in the Pacific.And the El Nino/La Nino cycle (collectively know as ENSO - El Nino Southern Oscillation) is a less frequent (about once every 7 years) but more impactful cycle that affects world wide weather. Specifically, strong El Nino events promote storm production in the Pacific while La Nina events suppress storm production. These therefore have a significant impact on the production of swell and surf. The paragraphs below analyze the state of the MJO and ENSO in the Pacific and provide forecasts for upcoming activity (or inactivity depending on the state and interaction of these two oscillations).

Overview: In 2019 warm equatorial waters were fading, and by August a tongue of cool water was tracking west on the equator from Ecuador over the Galapagos reaching to a point nearly south of Hawaii. A bit of a recovery tried to occur during Fall of 2019, with weak warm water building in the Nino 1.2 region, but cool water held in a pool off Peru. By April 2020 a cool pool was starting to build, forming a well defined cool tongue that evolved into La Nina, with it fully developing through July 2020. A slow dissolving of La Nina started in March 2021 with 2 Kelvin Waves sweeping east and arriving over the Galapagos in June. Weak warming set up over the equator with no cool waters present. NOAA declared La Nina dead. But cold water returned in July 2021 and a second pulse of La Nina developed through the Winter of 2022 and is continuing today, though possibly weaker with its foundation appearing to be in decline.

Rationale: It was assumed that the moderate La Nina from the Winter of 2020/2021 was on the wane and that a return to neutral ENSO state would set up over the Pacific Basin through the summer of 2021. But La Nina made a strong return by the end of Sept much like what the CFS model suggested would happen and a full double dip pattern took hold through the Winter of 21/22. But a quick fade is forecast as we move into late December 2022 with the CFS predicting a return to a neutral wind anomaly pattern and the low pressure bias making headway in to the KWGA in early Jan. Still it will take some time for the atmosphere to fully respond, resulting in a less than normal swell production forecast especially for Fall into early Winter 2022. But by later in Jan or early Feb 2023 a return to a more normal pattern might take hold. As a result a significantly reduced number of storm days and storm intensity is expected Oct 22-Jan 23, resulting in a below normal level of swells, with swell being below normal duration and period. But by Feb 2023, the number of storm days, intensity and duration of those storms should start improving as La Nina fades out. The net result is we're currently thinking a near normal number of swells with normal size and duration is to result, but all focused sometime after Jan 2023. The swell pattern will be below normal before Jan and above normal after Jan 23 with the average of the two being 'normal'. Of course this is all highly speculative at this early date.

KWGA/Equatorial Surface Wind Analysis (KWGA - Kelvin Wave Generation Area - The area 5 degrees north and south of the equator from 170W to 135E)
Analysis (TAO Buoys): As of (12/17) 5 day average winds were strong from the east over the Eastern equatorial Pacific and strong east over the Central Pacific and moderate east over the KWGA. Anomalies were light east over the East equatorial Pacific and modest east over the Central Pacific and light to modest east over the KWGA. (Note: These are 5 day average winds, versus realtime, so they lag what is happening today (by about 2.5 days).
1-2 Week Forecast (GFS Model): (12/18) Modest east anomalies were filling the KWGA today except for weak west anomalies in the far West KWGA. The 7 day forecast calls for modest west anomalies building east filling half the KWGA on 12/21 then backtracking a nearly gone at the end of the model run on 12/25 with strong east anomalies building on the dateline starting 12/21 and holding through the end of the model run. The 2 week GFS model is offline.

MJO/WWB/Wind Projections:
OLR Models: (12/17) A neutral MJO signal was indicated over the KWGA today. The statistical model indicates no real change over the next 2 weeks with maybe only a weak indication of the Inactive Phase of the MJO on the dateline on Day 5-15. The dynamic model suggest some flavor of the same thing but with the Active Phase trying to develop over the far West KWG on day 10 and 15 of the model run.
Phase Diagrams 2 week forecast (CA and GEFS): (12/18) The statistical model depicts the Active signal was very weak over the Indian Ocean moving to the Maritime Continent over the next 2 weeks and very weak. The dynamic model suggest the same thing but with the Active signal stronger at weak status.
40 day Upper Level Model (assumed to be a statistical mode and 1 week ahead of what is occurring at the surface): (12/16) A weak Active MJO (wet air) was over the KWGA today.The forecast has it moving east and into Ecuador on 1/15. A weak Inactive MJO (dry air) is forecast developing over the KWGA on 1/5 tracking east and filling the equatorial Pacific at the end of the model run on 1/25.
4 Week CFS Model (850 mb wind): (12/17) A moderate Inactive MJO signal was indicated today pushing over the KWGA with west anomalies limited to the far West KWGA and weak east anomalies over the dateline. The Inactive Phase is to track east over the KWGA through 12/31 with east anomalies building strongly over the dateline 12/20-12/29, then fading but still present at weak status at the end of the model run on 1/14. The Active Phase of the MJO is to develop and push east into the West KWGA starting 12/27 making it to 160E then fading on 1/7. Neutral to west anomalies are to pretty much hold filling the Western KWGA from 150E and points west of there from today forward. This is a positive change.
3 Month CFS Model (850 mb wind): (12/18) - using the 5th ensemble member - the mean of the 4 individual members which are all from the 00Z run - 1 run per day):
Today a weak Inactive MJO was over the KWGA with a mix of weak east and west anomalies in control of the KWGA. The Inactive MJO is to track east over the KWGA through 12/28 with east anomalies building strong on the dateline 12/20-12/28, then fading to weak status. A modest Active Phase of the MJO is to push over the KWGA 12/25 through 2/20 with west anomalies holding west of 160E until 1/11 then easing east and filling the KWGA beyond. . A weak Inactive MJO is forecast moving over the KWGA 2/8 through the end of the model run on 3/17 but with neutral of weak west anomalies holding in control of the KWGA through the end of the model run. The low pass filter indicates a high pressure bias with 2 contour lines centered at 180W with its western perimeter at 150E today. The second contour is to collapse on 1/30 with the primary contour collapsing or east of the KWGA by 2/20. A broad double contour low pressure bias is established centered over the West Maritime Continent at 90E with it's leading edge at 125E today and is be slowly pushing east then forecast to push hard east starting 2/24 and nearly on the dateline at the end of the model run. This is all a big deal and is being repeated in some form consistently from one run of the model to the next but not a quickly as previously forecast. It appears that the high pressure lockdown of the KWGA is starting to fade with no return in sight, indicating the demise of La Nina is underway. but it's a slow transition.

Subsurface Waters Temps
TAO Array: (12/14) Today in the far West Pacific the 29 degree isotherm was gone, previously at 171E. The 28 deg isotherm line was pushing east to 180W. The 26 degree isotherm was steady at 152W. The 24 deg isotherm backtracked from 118W to 128W and was at 132W today. Anomaly wise, warm anomalies at +3 deg C were in a broad pocket over the West, Central and now the East Pacific down 150m with it's leading edge easing east from to 110W. No cool anomalies were indicated. The hi-res GODAS animation posted 12/14 indicates a Kelvin Wave pushing east to 122W and far warmer. A cool pocket was centered at 100W near the surface with residual weakly cool waters filling the area above the Kelvin Wave over the entire equatorial Pacific. The GODAS animation appears to be 1 week behind the TAO data but also is more detailed and accurately modeled.
Sea Level Anomalies: (12/14) Sea heights were negative but rising over the East Equatorial Pacific. A broad pocket of positive anomalies were over the equator in the far West Pacific reaching east to 130W. A pocket of negative anomalies were covering from Ecuador to 130W. A weak core of -10 cm anomalies were fading east of 110W. Per the Upper Ocean Heat Anomaly Histogram cool anomalies were in quick retreat positioned in the Central Equatorial Pacific between 130W to Ecuador. It appears the stubborn cool pool is quickly collapsing while a large warm pool builds in the West.

Surface Water Temps
The more warm water in the equatorial East Pacific means more storm production in the North Pacific during winter months (roughly speaking). Cold water in that area has a dampening effect. Regardless of what the atmospheric models and surface winds suggest, actual water temperatures are a ground-truth indicator of what is occurring in the ocean. All data is from blended infrared and microwave sensors.
Satellite Imagery
Hi-res Nino1.2 & 3.4 Qualitative Analysis: (12/17) The latest images depict a broad generic pool of cool water extending west from Ecuador to the dateline with far weaker but still cool waters filling the area well south of the equator in a line east to west down at 20S. The coldest stream was embedded in it running from Ecuador to 145W on the equator but far weaker than days past and not even along the direct coast anymore. And the broad area of cool water south of that stream previously reaching south to 25S was losing intensity steadily and now only fully positioned north of 20S ad barely that. And warmer than normal temps were along the coasts of Chile and Peru. Overall this indicates the late stages of La Nina.
Hi-res 7 day Trend (12/17): A stream of weakly warming water extended west from Ecuador to 140W. A broad and solid are of warming water was locked along Peru and Chile extending west to 100W. The balance was towards warming.
Hi-res Overview: (12/17) Persistent cool waters cover a large area from Ecuador to 160E on and south of the equator from South America down at 20S with the coolest waters between 85W to 125W directly over the equator. But the intensity and density of those cold waters are in steep decline over it's entire area. Warmer than normal waters were along the coasts of Chile and Peru and nearly Ecuador. La Nina remains in control over the East Equatorial Pacific for the moment but the density and intensity of the cooling appears to be fading and warming water seems to be building.
Nino1.2 Daily CDAS Index Temps: (12/18) (These temps are biased high by about 0.2 degs compared to official sources). Today's temps were rising hard at -0.750 rising from -1.267 in early Dec and then modestly in the -1.5 degs range late Oct and all Nov. Previously temps were in the -1.0 range since 7/29. Temps were down on 7/20 to -1.6 degs. Previously temps were stable near -1.4 degrees 6/12 through 7/27. Peaks in that time frame were -1.189 (7/7), -1.534 (7/5). Previously temps were at -1.822 on 6/9 after being up to -1.506 (5/21) and that after hovering around -2.0 degs since 4/21/22. Prior to that temps were fading after peaking at +0.760 on 3/18. Temps had been moving upwards since 2/20, and beat a previous high of -0.650 degs on 1/9 and that after being down at -1.871 on 1/3/22 and -1.954 on 12/18/21, the lowest this year so far. Previously temps dropped on 11/24/21 at -1.700, the lowest in months after previously toggling steady at about -0.6 degs from mid Aug to Oct 6, then falling from there. That year temps bottomed out at -2.138 on 8/13/20. The longterm trend has been steadily downward.
Nino 3.4 Daily CDAS Index Temps: (12/18) (These temps are biased high by about 0.2 degs). Today's temps were steady at -1.136 after falling to -1.255 on 12/6 but otherwise have been holding around -1.0 degree since 11/3 and up to -0.900 on 10/18 beating a previous peak of -0.819 on 9/22. In general temps have been in the -1.0 range since 8/16. Temps had fallen since 7/15 reaching La Nina threshold on 7/27 after being more or less steady the previous 3 weeks peaking at -0.25 on 7/14 and -0.275 on 7/5. Previously temps had been on an upward trend since 5/15/22 rising to -0.414 degs (6/19) and -0.493 on 6/9, the first reading above La Nina threshold values since Sept 2021. Temps were down to -0.929 (5/2/22) and that after rising to a peak at -0.704 on 3/27 and had been on a gentle rising trend since falling to -1.012 on 3/8. Previously temps were rising slightly to -0.505 on 2/2 and that after reaching a peak low of -1.096 on 1/3/22 beating the previous low of -1.080 on 11/2/21, the lowest in a year. Prior to that temps had been in a freefall starting from the -0.175 range in early Sept/21. Before that temps peaked up at 7/1/21 +0.332, the highest in a year. Temps previously had been steady near -0.222 since early March 2021. Temps bottomed out at -1.654 on 11/3/2020.

CFSV2 Forecast for Nino3.4 Sea Surface Temp (SST) Anomalies & Current SST Anomalies

SST Anomaly Projections
CFSv2 Data
Previous - Temps rose in early Nov 2020 after bottoming out at -1.25 degs, up to -0.01 degs in mid-June 2021 then fading to -1.05 degs in mid-Nov then rebuilding to -0.7 in mid Feb 2022 then fading to -1.1 degs in May before starting an upward climb peaking in mid-June at -0.65 degs and mid July at -0.55 degs. A steady decline set in after that falling to -1.00 degs in Aug and Sept rising to -0.8 degs mid Oct then falling to -1.0 in Nov.
Forecast (12/18) - Temps are to start a steady rise today hitting -0.80 degs mid January and reaching above the La Nina threshold (-0.5 degs) in early Feb and up to +0.90 degs in August and in El Nino territory. This model suggests we are going to steadily transition towards ENSO neutral in Jan. The PDF Corrected forecast suggests temps have bottomed out and are to start pushing up to -0.75 degs mid- Jan rising above La Nina threshold the 1st week of Feb and rising from there forward to +0.75 degs in July and holding in August. All this is a significant upgrade. According to this version of the model we will hold in weak La Nina conditions through Fall before starting a trend towards neutrality in Dec with momentum towards El Nino in Spring. The surface temp coverage model suggests a temps holding steady through Nov. then a steady erosion of the coldest waters south of Nino3.4 (down at 20S) is to begin. By Dec a clear discharge of La Nina is to begin with near neutral temps prevailing over the entire equatorial Pacific and turning fully neutral in Feb and beyond. The greater equatorial Pacific cool signature looks to hold through mid-Oct then quickly dissolving beyond.
IRI Consensus Plume: The November 18, 2022 Plume depicts temps are -0.921 degs today. Temps to rise steadily from here forward to -0.732 degs in Dec and above the La Nina Threshold at -0.494 in Jan and -0.256 in Feb rising to +0.572 in July. This model suggests a continuation of minimal La Nina temps through early Dec then transitioning to ENSO neutral. This model is in line with the CFS model.
See chart here - link.

Atmospheric Coupling (Indicating the presence of El Nino in the atmosphere driven by the ocean):
Southern Oscillation Index (SOI) (negative is good, positive bad - all but the Daily Index was a lagging indicator):
Today (12/18) the Daily Index was rising at +28.39 today and has been neutral 5 days in mid Dec, but above +10 the previous 13 days and then generally below +10.0 before that (from 11/5-11/27). It was negative for 5 days dropping to -31.05 on 11/7. This was the first negative run in months and suggests that the westerly anomaly wind activity in the West Pacific might be having an impact on the SOI. Previous peaks were +37.19 (10/5), +33.57 (5/24), +40.77 (5/10), +31.44 (4/27), +31.80 (4/6), +27.33 (1/31) and +46.71 (12/26). The trend has been solidly positive. Previous other notable peaks were +30.98 (11/26/21), +36.90 (9/28), +27.75 ( 9/13) and +37.86 (7/15).
The 30 day average was rising at +10.08 after falling to +4.18 on 11/27 and peaking at +21.57 (10/16) after supposedly peaking at +19.66 on 9/28. It was down to +6.89 on 7/29. It peaked at +20.34 (5/12) the highest in a year and beating last years high of +19.51 (1/14).
The 90 day average was stable at +12.70 previously peaking at +15.61 on 10/25 and previously peaking at +12.92 on 8/11 and that after peaking at +18.40 (7/2) beating it's previous peak of +16.86 (5/31), the highest in a year. It previously peaked at +9.80 (9/21) after falling to it's lowest point in a year at +1.06 (6/9). The 90 day average peaked at +15.75 (2/23/21 - clearly indicative of La Nina then). This index is a lagging indicator but suggest La Nina is returning.

Pacific Decadal Oscillation
The PDO theoretically turned from a 16 year negative run (Jan 98-Feb 2014) in early 2014 and was positive till Dec 2019, but has been negative ever since, driven by recent La Nina conditions. In May-July 2021 it was the most negative its been in the -1.80 to -2.04 range since Sept 2012 (-2.99) and then fell to -3.16 in Oct 2021 (the lowest since July 1933) then settled at -2.72 in Nov and Dec 2021. Looking at the long term record, it seems likely we are still in the Cool Phase of the PDO (La Nina 'like') with no signs of moving to the positive/warm phase (El Nino 'like').

Local Interest
Stormsurf Video Surf Forecast for this week. See it Here
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Time Zone Converter By popular demand we've built and easy to use time convert that transposes GMT time to whatever time zone you are located. It's ion left hand column on every page on the site near the link to the swell calculator.