Tuesday, April 5, 2022
- Buoy 233 (Pearl Harbor)/Buoy 239 (Lanai) NA/Buoy 238 (Barbers Pt) NA: Seas were 3.4 ft @ 7.7 secs with swell 2.5 ft @ 8.1 secs from 150 degrees. Water temp 76.6 degs (Barbers Pt), NA (Lani 239), 76.5 (Pearl Harbor 233).
- Buoy 106 (Waimea): Seas were 5.3 ft @ 12.5 secs with swell 3.2 ft @ 11.9 secs from 329 degrees. Water temp 76.8 degs.
- Buoy 46025 (Catalina RDG): Seas were 4.6 ft @ 7.1 secs with swell 1.9 ft @ 13.7 secs from 276 degrees. Wind northwest at 3-6 kts. Water temperature 61.9 degs, 57.9 (Topanga 103), 58.6 degs (Long Beach 215), 59.7 (Del Mar 153), 61.5 (Imperial Beach 155). At Harvest Buoy (071) primary swell was 5.9 ft @ 12.8 secs from 302 degrees. At Santa Monica (028) swell was 1.3 ft @ 14.5 secs from 246 degrees. At Oceanside (045) swell was 1.4 ft @ 14.6 secs from 228 degrees. Southward at Pt Loma (191) swell was 2.6 ft @ 15.0 secs from 276 degrees. Water temp 61.7 degs.
- Buoy 46012 (Half Moon Bay)/029 (Pt Reyes): Seas were 14.1 ft @ 13.3 secs with swell 10.1 ft @ 13.3 secs from 305 degrees. Wind at buoy 46012 was northwest at 18-21 kts. Water temp 49.6 degs (Pt Reyes 029), 50.2 (46026), 53.4 (SF Bar 142), and 54.3 (Santa Cruz 254).
Swell Classification Guidelines
Significant: Winter - Swell 8 ft @ 14 secs or greater (11+ ft faces) for 8+ hours (greater than double overhead).
Summer - Head high or better.
Advanced: Winter - Swell and period combination capable of generating faces 1.5 times overhead to double overhead (7-10 ft)
Summer - Chest to head high.
Intermediate/Utility Class: Winter - Swell and period combination generating faces at head high to 1.5 times overhead (4-7 ft).
Summer - Waist to chest high.
Impulse/Windswell: Winter - Swell and period combination generating faces up to head high (1-4 ft) or anything with a period less than 11 secs.
Summer - up to waist high swell. Also called 'Background' swell.
Surf Heights for Hawaii should be consider 'Hawaiian Scale' if period exceeds 14 secs.
On Tuesday (4/5) North and Central CA had set waves at 2-3 ft overhead and lined up but warbled and lumpy and uneven but with light wind early. Protected breaks were head high to 1 ft overhead and lined up and fairly clean with light wind but closed out. At Santa Cruz surf was head high with sets 1-2 ft overhead and clean and fairly lined up but soft with light fog. In Southern California/Ventura waves were waist to maybe chest high and warbled and mushed with alot of northwest lump though local wind was calm. Central Orange County had sets at head high or so and lined up with decent form but soft with south texture from south winds. South Orange County's best summertime breaks were thigh to maybe waist high and weak but real glassy. North San Diego had sets at chest high or so and lined up with decent form and glassy when the sets came. Hawaii's North Shore had sets at head high to 1 ft overhead and lined up with decent form and fairly clean conditions. The South Shore was thigh to maybe waist high on the sets and weak but clean. The East Shore was chest high and lightly chopped from modest east trades.
See QuikCASTs for the 5 day surf overview or read below for the detailed view.
On Tuesday (4/5) California was getting locally generated northwest windswell mixed with swell from a gale that developed in the Gulf peaking on Mon (4/4) with 33 ft seas aimed east. Hawaii was getting sideband energy from the same system. But after that Winter is likely over. One small system is forecast developing over the dateline on Mon (4/11) producing 21 ft seas aimed east and fading before moving decent east. Down south a system developed southeast of New Zealand on Sun (4/3) tracking east-northeast and is forecast to cross the South Pacific through Thurs (4/7) with seas 28-30 ft. Something to monitor. Beyond nothing obvious is forecast. Summer is coming.
See all the details below...
SHORT- TERM FORECAST
Current marine weather and wave analysis plus forecast conditions for the next 72 hours
On Tuesday (4/5) the jet was split off Japan tracking east then consolidated on the dateline falling into a weak trough in the Western Gulf being fed by 130 kt winds offering limited support for gale development before ridging some and pushing over the Pacific Northwest. Over the next 72 hours that trough is to make it to the Central Gulf on Thurs (4/7) while weakening offering nothing then while back to the west the jet is to be a fragmented mess. Beyond 72 hours starting Sat (4/9) the jet is to be well split over the dateline and then split again just northwest of Hawaii offering no support for gale development. And that pattern is to hold through Tues (4/12) with the jet totally split off Japan then and continuing split over the entirety of the North Pacific through the end of the model run on Tues (4/12). Summer is already here.
On Tuesday (4/5) swell from a gale previously over the Gulf was building in North and Central CA (see Gulf Gale below).
Over the next 72 hours no swell producing weather systems are forecast.
On Sun AM (4/3) another gale started building in the Northwestern Gulf with 40-45 kts west winds over a small area and seas building from 23 ft at 47.75N 157.75W aimed east. In the evening 45 kt west winds were over the Northeastern Gulf with seas 31 ft at 49.25N 145.25W aimed east. On Mon AM (4/4) it moved east with 45 kts west winds off North British Columbia with 34 ft seas at 49N 136.25W aimed east. The gale moved inland over Vancouver Island in the evening. Something to monitor.
North CA: Expect swell arrival on Tues (4/5) building to 12 ft @ 15 secs (18 ft) later and totally buried in local windswell and shadowed in the SF Bay Area. Swell fading Wed (4/6) from 9.4 ft @ 13 secs (12 ft) and still shadowed in SF. Swell Direction: 310-320 degrees
North Pacific Animations: Jetstream - Surface Pressure/Wind - Sea Height - Surf Height
No tropical systems of interest are forecast.
California Nearshore Forecast
- Wed (4/6) morning northwest winds are forecast at 10-15 kts for Cape Mendocino and 20 kts for all of North and Central CA early. In the afternoon northwest winds are forecast fading from 15-20 kts for North CA and 15 ks for Central CA.
- Thurs (4/7) morning northwest winds at forecast at 15 kts for Cape Mendocino and 10 kts for the remainder of North CA early and 5-10 kts for Central CA. In the afternoon northwest winds are forecast at 15 kts for Cape Mendocino but 10 kts for the remainder of North CA and 5-10 kts for Central CA.
- Fri (4/8) northwest winds are to be on the rise again at 20-25 kts for North CA early and 10-15 kts for Central CA. In the afternoon northwest winds are forecast at 30-35 kts for all of North CA and 20-25 kts for Central CA.
- Sat (4/9) northwest winds are forecast at 30-40 kts for North CA early and 30 kts for Central CA. In the afternoon northwest winds are forecast at 30-40 kts for North CA and 30-35 kts for Central CA.
- Sun (4/10) northwest winds are forecast at 30-35 kts for North and Central CA early. In the afternoon northwest winds are to still be 30-35 kts for Pt Arena southward to Pt Conception.
- Mon (4/11) morning northwest winds are forecast at 10 kts for Cape Mendocino and 15-20 kts down to the Golden Gate then 30 kts for all of Central CA. In the afternoon another bout of high pressure sets up with northwest winds 30-35 kts for all of North and Central CA and near 30 kts into all of Southern CA.
- Tues (4/12) morning northwest winds are forecast at 30-35 kts for all of North and Central CA and 25 kts for Southern CA. Water temps to drop hard everywhere from upwelling.
Total snow accumulation for the next 10 days respectively for Squaw Valley, Sugar Bowl, Kirkwood and Mammoth at 1, 1, 1, and 3 inches all on 4/11.
Freezing level building to 12,000 ft starting late on 4/5 and holding till 4/9 when it start falling possibly reaching 4,000 ft on 4/11. A slow rebuild back to 8,000 ft is to start 4/12-4/14.
Tioga Pass/Pacific Crest Trail intersection forecast: Temps - Freeze Level (more here - scroll down to 'Resort Snow Forecasts>Central CA or North CA Caltrans & Backcountry')
Snow Models: http://www.stormsurf.com/mdls/menu_snow.html (Scroll down for resort specific forecasts). Updated!
Small swell from a gale developing southeast of New Zealand is radiating north towards Hawaii and CA (see Small New Zealand Gale below).
Over the next 72 hours the New Zealand Gale (below) is to be the only system of interest.
New Zealand Gale
On Sun PM (4/3) a gale was developing south of New Zealand producing 35-40 kt west-southwest winds and seas 26 ft at 59S 176.5E aimed east-northeast. On Mon AM (4/4) 35-40 kt southwest winds were building in coverage with seas 29 ft at 54.5S 168.5W aimed northeast. In the evening a solid fetch of 30-40 kt southwest winds were over the Central South Pacific with seas 29 ft at 51.25S 151.25W aimed northeast. On Tues AM (4/5) fetch was 30-40 kts from the southwest over the Southeast Pacific with seas 25 ft at 49.25S 138.25W aimed northeast. In the evening 30-35 kt west winds are to be tracking east with seas 25 ft at 55.5S 142.25W aimed east-northeast. Fetch is to hold Wed AM (4/6) over the Southeastern Pacific from the southwest at 35-45 kts with seas to 28 ft at 52.25S 132W aimed east-northeast. Fetch fading in the evening from 40 kts from the west over the far Southeast Pacific with seas 30 ft at 56.25S 122.5W aimed northeast. Fetch and seas to be dissipating from there while moving east of the California swell window. Something to monitor.
South Pacific Animations: Jetstream - Surface Pressure/Wind - Sea Height - Surf Height
Marine weather and forecast conditions 3-10 days into the future
Beyond 72 hours the models suggest a small gael forming mid-way between the Kuril Islands and the dateline on Sun-Mon (4/11) producing 22 ft seas at 44N 173E aimed southeast, then fading pretty quickly before reaching the dateline. No meaningful swell is expected to result even if this system forms as forecast.
Beyond 72 hours starting Mon AM (4/11) a new system is to start building southeast of New Zealand with 40 kt southwest winds and seas building from 29 ft at 59S 175W aimed east. Fetch fading in the evening from 35 kts with 28 ft seas at 59.5S 164.75W aimed east. The gael is to fade from there. Something to monitor.
La Nina Weakening - Kelvin Wave Erupting - No Warm Water Behind
Summary - Cool subsurface water volume peaked under the equatorial Pacific on 10/15/21 and is now fading. A stronger than expected Active Phase of the MJO in Dec produced a Kelvin Wave that is erupting over the Galapagos with water temps on the rise there, but still solidly in La Nina territory over the Central Pacific. A much hoped for Active Phase of the MJO (and westerly anomalies) previously delayed is developing. It seemed the peak of La Nina was behind us. But a 3rd year of La Nina is projected by the CFS model, though that is not certain. Much steady west anomalies are forecast from here forward. The outlook is unclear but seems biased towards another year of La Nina.
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 and is continuing today, though possibly weaker with its foundation appearing to be in decline.
LONG-RANGE PACIFIC STORM AND SWELL GENERATION POTENTIAL FORECAST
Fall /Winter 2021-2022 = 1.5 (California & Hawaii)
Rating based on a 1-10 scale: 1 being the lowest (small and infrequent surf conditions), 5 being normal/average, and 10 being extraordinary (frequent events of large, long period swells)
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. A full double dip La Nina pattern took hold as we moved into November with this second La Nina dip being nearly as strong as the previous one. But a quick fade is forecast as we move into late December with the CFS predicting a return to a neutral wind anomaly pattern at that time 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. But by later in Feb 2022 perhaps a return to a more normal pattern might take hold. But it will be too little too late. As a result a significantly reduced number of storm days and storm intensity is expected Oct-Feb 2022, resulting in a below normal level of swells, with swell being below normal duration and period. But by March 2022, the number of storm days, intensity and duration of those storms should start improving as La Nina fades out. The status of the PDO is not known, though it appears to be returning to at least a neutral state, rather than the warm phase as previously projected thereby having no significant positive or negative effect on the long term outlook.
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 (4/4) 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 neutral over the East equatorial Pacific and neutral over the Central Pacific and light 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 Week Forecast (GFS Model): On (4/5) west anomalies were moderate to strong filling the West KWGA with moderate east anomalies over the dateline. The 7 day forecast calls for more of the same but with east anomalies weakening starting 4/9 and tracking east through the end of the model run on 4/12.
Kelvin Wave Generation Area wind monitoring model: West and East
- MJO/WWB/Wind Projections:
OLR Models: (4/4) A neutral MJO signal was indicated today in the KWGA. The statistical model indicates no change through the last day of the model run 15 days out. The dynamic model projects a dead neutral pattern for the next 5 days turning to an Active Phase on day 10 in the KWGA and filling the KWGA then weakening on day 15. The 2 models are mostly in sync except 2 weeks out.
Phase Diagrams 2 week forecast (ECMF and GEFS): (4/5) The statistical model depicts the Active Phase was very weak over the West Pacific and is forecast to stay there unchanged for the next 2 weeks. The dynamic model suggests the same thing.
40 day Upper Level Model (assumed to be a statistical mode and 1 week ahead of what is occurring at the surface): (4/4) An Active MJO signal (wet air) was weakly over the West Pacific today. The forecast depicts the Active Phase (wet air) moving east while slowly fading moving to the Central Pacific and into Central America on 4/24. The Inactive Phase is to follow moving over the KWGA on 4/14 and weak, tracking east and over the East equatorial Pacific and into Central America on 5/4. A neutral Phase is to take over the West Pacific on 5/4 pushing east to the East Pacific at the end of the model run on 5/14.
4 Week CFS Model (850 mb wind): (4/4) A solid Active signal was moving over the KWGA today with west anomalies filling the KWGA at moderate strength. The forecast has west anomalies holding over the KWGA through 4/10 but with east anomalies building on the dateline through 4/10. The Active Phase is to push east of the KWGA on 4/18 while building strong over the East Pacific 4/11-3/25 but of no use to anyone. East anomalies are to take over the KWGA starting 4/11 and holding through the end of the model run on 5/2 with the Inactive MJO trying to push into the West KWGA 4/14 through the end of the model run. West anomalies are to totally be gone from the KWGA by 4/15.
3 Month CFS Model (850 mb wind): (4/5 - using the 5th ensemble member - the mean of the 4 individual members which are all from the 00Z run - 1 run per day):
Today the Active Phase of the MJO was pushing east filling the KWGA with modest west anomalies filling the KWGA. The forecast depicts the Active Phase continuing pushing over the KWGA through 4/24 with west anomalies filling east to 170E. A weak Inactive MJO signal is to follow starting 4/19 in the west holding through 6/4 with west anomalies fading some but still filling the entirety of the KWGA. The Active Phase is to reappear on 5/29 filling the KWGA through the end of the model run on 7/3 with west anomalies building and filling the entirety of the KWGA. The low pass filter indicates a high pressure bias with 2 contour lines was centered east of the dateline at 150W with its western perimeter at 170E today and forecast slowly easing east and pushing east to the dateline 6/7 with the second contour fading away on 6/8. A broad single contour low pressure bias is established centered over the Maritime Continent at 110E with it's leading edge at 150E filling half the KWGA and is forecast moving slowly but steadily east from now on reaching 170E on 6/20. Of note, the leading edge of the low pressure bias has been stalled at 150E since 1/31, but finally started moving east on 3/25 and is still doing that today. Something to monitor. Today a solid east anomaly pattern that had been in control of KWGA since early July 2021 is done. And today's run of the model now suggests those east anomalies are to recenter themselves at 135W starting 4/29 and holding for the foreseeable future. All this suggest the full demise of La Nina if this occurs as forecast. That said, there is only one more Active MJO forecast for this winter, and we're in it now meaning only one more shot at support for some sort of gale/swell production. The model had been constantly shifting the arrival of the low pressure bias into the KWGA almost daily but that seems to not be the case lately. So the future remains uncertain but cautiously optimistic. The demise of La Nina all hinges on the eastward progress of the low pressure bias which is to be starting to move east now.
CFSv2 3 month forecast for 850 mb winds, MJO, Rossby etc - Alternate link
Subsurface Waters Temps
TAO Array: (4/5) Today in the far West Pacific the 29 degree isotherm was barely present at 164E. The 28 deg isotherm line was pushing east to 176E after falling back to 168E on 3/23. The 24 deg isotherm was steady across the East Pacific. Anomaly wise, warm anomalies +3 deg C were in a pocket in the far West Pacific down 150m with it's leading edge stable at 160W with a previous Kelvin Wave in the East Pacific at +1C down 25m centered at 105W pushing east and fading. A broad area of -2C cool anomalies were in between the two centered at 135W. The hi-res GODAS animation posted 3/29 indicates the same pocket of cool anomalies between 155W-120W at -5 degs C and appearing to be stable in coverage and intensity while the remnants of the Kelvin Wave in the east fade. The GODAS animation appears to be 1 week behind the TAO data but also is more detailed and accurately modeled.
Sea Level Anomalies: (3/29) Sea heights were falling over the Equatorial Pacific. A string of weakly positive anomaly pockets were at 5N pushing from the dateline into the Galapagos. But the highlight remains a broad pocket of negative anomalies over the equator between 155W to 100W at to -15 cms at 140W. Otherwise positive anomalies were mostly locked west of the dateline. Per the Upper Ocean Heat Anomaly Histogram the previous Kelvin Wave was holding between 80W-101W with cool anomalies at -2.25 degs between 120W-161W. It is unknown whether cool anomalies will return in earnest moving forward.
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.
Hi-res Nino1.2 & 3.4 Qualitative Analysis: (4/4) The latest images depict a broad generic pool of cool water on the equator extending west from 135W dissipating on the dateline. Warming waters were building from Ecuador west beyond the Galapagos to 135W. A broad pocket of cool water was off the coast of Peru starting at 95W extending west and reaching up to the equator out at 135W continuing to the dateline. An area of warm water was holding just north of the equator across the entire North Pacific. Overall this indicates the late stages of La Nina.
Hi-res 7 day Trend (4/4): Weak warming was moving west extending from 120W to almost the dateline and north and south of the equator east of there. Weak cooling was present from Ecuador west to 120W a degree or two north and south of the equator.
Hi-res Overview: (4/4) The deep cold core of the La Nina cool pool is gone. Residual cool waters were focused near 160W still covering a large area starting well off Peru from 90W and on the equator from 130W and points west to 160E. Cooler than normal waters were also south of that line down to 20S though losing coverage and intensity. Warmer than normal waters were aligned from 3N and above over the entire North Pacific. La Nina is solid but appears to be fading focused over the equatorial Central Pacific.
Nino1.2 Daily CDAS Index Temps: (4/5) Today's temps were steady down at -0.219 the past 12 days 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 and -1.954 on 12/18, the lowest this year so far. Previously temps dropped on 11/24 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. Last 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: (4/5) Today's temps were steady at -0.747 after rising to -0.704 on 3/27 and had been on a gentle rising trend since falling to -1.012 on 3/8. Previously temp were rising slightly to -0.505 on 2/2 and that after reaching a peak low of -1.096 on 1/3 beating the previous low of -1.080 on 11/2, the lowest in a year. Prior to that temps had been in a freefall starting from the -0.175 range in early Sept. Before that temps peaked up at 7/1 +0.332, the highest in a year. Temps previously had been steady near -0.222 since early March. 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 Uncorrected 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 some after that.
Forecast (4/5) - Temps are to continue falling to -1.35 degs in early May and then slowly rising to about -1.00 degs July more or less holding there into Dec, then rising more directly beyond. This model suggests we are at going to fall into a third year of La Nina. The PDF Corrected forecast suggests temps falling to -1.05 degs in May then rising to about -0.75 degs in July and roughly holding there before falling to -1.00 degs in Nov. Still, neither of these forecasts are consistent with the IRI forecast (see IRI Consensus forecast below).
IRI Consensus Plume: The March 18, 2022 Plume depicts temps are -0.738 degs today and have bottomed out. They are to warm to -0.315 degrees in May, then rising to -0.287 degs in July and hovering there through Sept then rising to near 0,0 degs after that. A return to ENSO neutral is expected this summer. Still, this latest update is cooler and slower in returning to normal than the previous forecast.
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 - this is a lagging indicator):
Today (4/5) the daily index was positive at +25.96 after peaking at +27.33 on 1/31/22 and +46.71 on 12/26. The trend of late has been solidly positive. Previous other notable peaks were +30.98 on 11/26, +36.90 on 9/28, +27.75 on 9/13 and +37.86 on 7/15.
The 30 day average was falling some at +10.88 down some from the highest in a year on 3/27 at + 13.46, after falling to +0.83 on 1/27 then peaking at +13.07 on 12/31 after previously falling to +6.06 on 11/6 after peaking at +11.58 on 10/22. Before that it fell to -3.36 on 6/22, the lowest in a year. It peaked at +19.51 on 1/14.
The 90 day average was rising some at +7.81 today after previously peaking at +9.36 on 3/22 and +10.90 on 12/26, falling to +7.10 on 11/1. It previously peaking on 9/21 at +9.80 after falling to it's lowest point in a year on 6/9 at +1.06. The 90 day average peaked at +15.75 on 2/23 (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').
See imagery in the ENSO Powertool
Stormsurf Video Surf Forecast for this week. See it Here
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NBC News - Climate Change and Surfing: https://www.nbcnews.com/mach/science/climate-change-good-surfing-other-sports-not-so-much-ncna1017131
Mavericks & Stormsurf on HBO Sports with Bryant Gumbel https://www.youtube.com/watch?v=luQSYf5sKjQ
Pieces Featuring Stormsurf:
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.
Surf Height-Swell Height Correlation Table