Surf Forecasts and Marine Weather - No Hype - Just the Facts!
Another Central South Pacific Gale Developing! - Video Forecast HERE (7/7/24)
Buoys | Buoy Forecast | Bulletins | Models: Wave - Weather - Surf - Altimetry - Snow | Pacific Forecast | QuikCAST | El Nino | Tutorials | Great Circles | Video


Stormsurf Mobile App

Create Your Own Surf Forecast
Swell Calculator
Swell Decay Tables
Sea Height Tables
Swell Category Table
Convert from GMT:
 to timezone:


Pacific Storm and Surf Forecast
Updated: Saturday, June 20, 2020 7:21 PM
Buoys: Northern CA - Southern CA - Hawaii - Gulf of Alaska - Pacific Northwest
Buoy Forecast:
Northern CA - Southern CA - Hawaii - Gulf of Alaska - Pacific Northwest
Pacific Links:  Atmospheric Models - Buoy Data - Current Weather - Wave Models
Forecast Archives: Enter Here
A chronology of recent Mavericks Underground forecasts. Once you enter, just click on the HTML file forecast you want to review (e.g. 073199.html equals July 31, 1999). To view the maps that correspond to that forecast date, select the html file labeled 073199 maps.html
2.3 - California & 3.1 - Hawaii
Using the 'Summer' Scale
(See Swell Category Table link at bottom of page)

Probability for presence of largest swells in near-shore waters of NCal, SCal or Hawaii.    

Issued for Week of Monday 6/22 thru Sun 6/28

Swell Potential Rating Categories
5 = Good probability for 3 or more days of Significant swell
4 = Good probability for 1-2 days of Significant swell
3 = Good probability for 3 or more days of Intermediate/Advanced swell
2 = Good probability for  1-2 days of
Intermediate/Advanced swell
1 = Good probability for 3 or more days of Impulse or Windswell
0 = Low probability for 1-2 days of Impulse or Windswell   

Final NZ Swell Hitting HI
Small New Zealand Swell Hitting CA - More To Come

On Saturday, June 20, 2020 :

  • Buoy 233 (Pearl Harbor Entrance)/Buoy 239 (Lanai): Seas were 3.9 ft @ 15.4 secs with swell 2.2 ft @ 15.4 secs from 179 degrees.
  • Buoy 106 (Waimea): Seas were 4.0 ft @ 8.3 secs with swell 2.6 ft @ 7.9 secs from 28 degrees. Water temp 78.1 degs.
  • Buoy 46025 (Catalina RDG): Seas were 2.1 ft @ 15.9 secs with swell 1.5 ft @ 15.4 secs from 222 degrees. Wind at the buoy was west at 10-12 kts. Water temperature 66.9 degs. At Harvest Buoy (071) primary swell was 1.8 ft @ 16.0 secs from 201 degrees. At Santa Monica (028) swell was 1.3 ft @ 16.0 secs from 205 degrees. At Oceanside (045) swell was 1.6 ft @ 15.7 secs from 205 degrees. Southward at Point Loma (191) swell was 2.0 ft @ 15.9 secs from 197 degrees.
  • Buoy 46012 (Half Moon Bay)/029 (Pt Reyes): Seas were 6.5 ft @ 11.1 secs with swell 3.3 ft @ 10.0 secs from 294 degrees with southern hemi swell 2,1 ft @ 15.8 secs from 207 degrees. Wind at the buoy (012) was northwest at 12-16 kts. Water temp 53.2 degs (013), 55.6 degs (SF Bar) and 59.0 degs (042).

See Hi-Res Buoy Dashboards (bottom of the page)

Swell Classification Guidelines

Significant: Winter - Swell 8 ft @ 14 secs or greater (11+ ft faces) for 8+ hours (greater than double overhead).
- 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).
- 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.
- up to waist high swell. Also called 'Background' swell.

Surf Heights for Hawaii should be consider 'Hawaiian Scale' if period exceeds 14 secs.

Current Conditions
On Saturday (6/20) in North and Central CA locally generated north windswell was producing waves at thigh to waist high and warbled and crumbled with light near chop on top and pretty messy. Protected breaks were up to waist high and fairly clean and soft and weak. At Santa Cruz southern hemi swell was rarely hitting producing waves to shoulder high on the sets but with some weak whitecaps outside the kelp and soft. In Southern California/Ventura waves were flat and nearly chopped. Central Orange County had waves at waist to chest high and somewhat lined up coming from the south but chopped from north wind. South Orange County's best summertime breaks had waves at shoulder to head high on the sets and lined up but with a bit of warble intermixed from northwest wind. North San Diego had waves at waist high and warbled with small whitecaps on top driven by local north wind. Hawaii's North Shore was flat and clean. The South Shore was getting new south swell with waves 2 ft overhead on the sets and clean and lined up. The East Shore was getting east windswell at waist high with east tradewinds blowing and chopped conditions.

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

Meteorological Overview
On Saturday (6/20) small New Zealand swell was hitting California originating from a gale that passed east under New Zealand Mon-Tues (6/9) producing up to 38 ft seas aimed east. Swell was starting to hit Hawaii from another small gale formed southeast of New Zealand Fri-Sun (6/14) lifting north but only produced 30 ft seas early Saturday aimed a little to the northeast, then dissipating. Beyond the models continue to suggest a gale forming under New Zealand tracking east Fri-Sun (6/21) producing up to 37 ft seas aimed east-northeast with another system right behind it Sun-Mon (6/22) producing 39 ft seas aimed northeast. Possible decent swell to result for the East Pacific. Perhaps another gale to form southeast of New Zealand Wed-Fri (6/26) producing up to 35 ft seas aimed northeast. And maybe one more is possible in the Southeast Pacific on Sat (6/27) with 41 ft seas aimed north.

See all the details below...


Current marine weather and wave analysis plus forecast conditions for the next 72 hours

North Pacific

Surface Analysis
On Saturday (6/20) no swell of interest was in the water.

Over the next 72 hours no swell producing fetch of interest is forecast.


North Pacific Animations: Jetstream - Surface Pressure/Wind - Sea Height - Surf Height


Tropical Update
No tropical systems of interest are being monitored.

California Nearshore Forecast
On Saturday (6/20) a light eddy flow (south winds) occurred early for the whole state and holding all day expect Pt Arena area with northwest winds 10-15 kts. Sun (6/21) northwest winds are forecast at 15-20 kts for all of North and Central CA early building to near 20 kts in the afternoon. Mon (6/22) northwest winds are forecast at 20-25 kts for North CA and 10-15 kts for Central CA holding up north all day but fading to 10 kts for Central CA in the afternoon. Tues (6/23) north winds to be 20-25 kts limited to Cape Mendocino with a light eddy flow from Pt Arena southward. No change on Wed (6/24) but with north winds building over all of North CA to 25-30 kts and then 30 kts solid on Thurs (6/25) while the eddy flow holds from Pt Reyes southward. Fri (6/26) north winds to be 30-35 kts limited to Cape Mendocino with and eddy flow south of there all day. On Sat (6/27) north winds to be 30-35 kts reaching south to Bodega Bay with light northwest winds 10 kts south of there all day.

Total snow accumulation for the week for Squaw Valley, Sugar Bowl, Kirkwood and Mammoth at 0, 0, 0 and 0 inches respectively. Snow level 14,000 ft or higher for the week except falling to 11,000 ft on June 30.

Snow Models: (Scroll down for resort specific forecasts). Updated!


South Pacific

On Saturday (6/20) the jetstream was split with a trough pushing northeast under New Zealand being fed by 120 kts winds offering some support for gale development. East of there over the Southeast Pacific a solid ridge was pushing the jet southeast into and over Antarctic Ice offering no support for gale development. Over the next 72 hours the trough under New Zealand is to get reinforced by 140 kt winds lifting northeast and holding into Monday (6/22) offering renewed support for gale development then collapsing on Tues (6/23). Beyond 72 hours starting Wed (6/24) another trough is to build under New Zealand lifting northeast and being fed by 160 kts winds tracking east into early Thurs (6/25) and starting to pinch of later in the day with winds weakening feeding it offering fading support for gale development. But there's some suggestion that the pinched trough might redevelop positioned well to the north on Sat (6/27) again perhaps offering some support for gale development over the Southeast Pacific. No ridges are forecast to follow under New Zealand, just a weak jetstream flow.

Surface Analysis
On Saturday (6/20) swell was hitting California weakly from a gale that pushed under New Zealand (see Weak New Zealand Gale below). And swell was starting to hit Hawaii from yet one more weak gale that formed under New Zealand tracking east (see Final New Zealand Gale below). Another gale is developing under New Zealand (see Another New Zealand Gale below).

Over the next 72 hours another gale is to develop south of New Zealand on Sat PM (6/20) producing 40 kt southwest winds with seas building. On Sun AM (6/21) a solid fetch of 40 kt west-southwest winds are to be building tracking east with seas building from 34 ft at 58S 179W aimed east-northeast. In the evening fetch is to track northeast at 45 kts with seas building to 37 ft at 56S 176.5W aimed northeast. On Mon AM (6/22) the gale is to be lifting northeast with fetch fading at 40-45 kts from the southwest and seas 38 ft at 54S 159.5W aimed northeast. Fetch is to be fading in the evening from 35-40 kts with seas fading from 37 ft at 50.5S 149.5W aimed northeast. The gael to dissipate after that. Something to monitor.


Weak New Zealand Gale
A weak primer gale started developing under New Zealand on Mon PM (6/8) producing 45 kt southwest winds over a small area and 30 ft seas at 58S 179E aimed northeast. On Tues AM (6/9) fetch was fading from 40 kts from the southwest with 29-30 ft seas over a small area at 57S 168W aimed northeast. Behind it a stronger gale was building south-southwest of New Zealand with 45-50 kt west winds and seas building to 39 ft over a modest sized area at 57S 156E aimed east. In the evening fetch was fading from 40 kts from the west-southwest and seas at 36 ft at 56S 172E aimed east. The gale was pushing east-northeast on Wed AM (6/10) producing 30 kt southwest winds and seas fading from 29-30 ft at 55S 173W aimed east-northeast. This system was gone after that. Some minimal swell is radiating northeast towards Hawaii and a little more energy towards the US West Coast with luck. Something to monitor.

Southern CA: Swell holding on Sat (6/20) at 2.2 ft @ 16-17 secs early (3.5 ft). Swell fading on Sun (6/21) from 2.1 ft @ 15 secs (3.0 ft). Residuals fading on Mon (6/22) from 1.6 ft @ 14-15 secs early (2.0 ft). Swell Direction: 208-210 degrees

North CA:Swell holding on Sat (6/20) at 2.1 ft @ 16-17 secs early (3.5 ft). Swell fading on Sun (6/21) from 2.0 ft @ 15 secs (3.0 ft). Residuals fading on Mon (6/22) from 1.3 ft @ 14-15 secs early (2.0 ft). Swell Direction: 206-209 degrees


Final New Zealand Gale
One more gale formed southeast of New Zealand on Fri AM (6/12) with lifting northeast with a broad area of 35-40 kt southwest winds and seas 27 ft at 54S 176E aimed northeast. In the evening 35-40 kt southwest winds lifted northeast with 30 ft seas at 57S 174W aimed northeast. The gale faded from there while lifting due north Sat AM (6/13) with 30-35 kt south winds and seas 30 ft over a tiny area at 55S 165W aimed northeast. In the evening fetch is to fade out. Low odds of any meaningful swell resulting.

Oahu: Swell holding on Sat (6/20) at 2.6 ft @ 16 secs (4.0 ft) early. Swell fading on Sun (6/21) from 2.8 ft @ 14-15 secs early (3.5-4.0 ft). Swell fading on Mon (6/22) from 2.3 ft @ 13 secs (3.0 ft). Residuals on Tues (6/23) fading from 2.0 ft @ 12 secs (2.0-2.5 ft). Swell Direction: 187 degrees

Southern CA: Expect swell arrival on Sun (6/21) building to 1.3 ft @ 18 secs late (2.0-2.5 ft). Swell building on Mon (6/22) to 2.3 ft @ 16-17 secs through the day (3.5 ft). Swell continues Tues (6/23) at 2.1 ft @ 15 secs (3.0-3.5 ft). Residuals on Wed (6/24) fading from 2.0 ft @ 14 secs (2.5-3.0 ft). Swell Direction: 204-209 degrees

North CA: Expect swell arrival on Sun (6/21) building to 1.1 ft @ 18 secs late (2.0 ft). Swell building on Mon (6/22) to 1.6 ft @ 16-17 secs through the day (2.5 ft). Swell continues Tues (6/23) at 2.1 ft @ 14-15 secs. Residuals on Wed (6/24) fading from 2.0 ft @ 14 secs (2.5 ft). Swell Direction: 204-208 degrees


Another New Zealand Gale
A gale started forming while sweeping east under New Zealand on Fri AM (6/19) producing 35-40 kt southwest winds with seas 31 ft at 58S 157E aimed east. In the evening 35-40 kt southwest winds held tracking east with seas building to 32 ft at 58S 167.5E aimed east-northeast. On Sat AM (6/20) the gale tracked east and built with 40-45 kt southwest winds and seas 33 ft seas at 59.5S 175.5E aimed east-northeast. In the evening the gale is to track east producing southwest winds at 40-45 kts with seas 37 ft at 58.5S 168.5W aimed east-northeast. The gale is to dissipate quickly after that. Swell is to be pushing northeast.

Oahu: Possible swell arrival on Fri (6/26) building to 1.6 ft @ 18-19 secs late (2.5 ft).


South Pacific Animations: Jetstream - Surface Pressure/Wind - Sea Height - Surf Height




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

North Pacific

Beyond 72 hours no swell producing fetch of interest is forecast.


South Pacific

Beyond 72 hours another gale is forecast developing under New Zealand on Wed AM (6/240 producing 40 kt southwest winds and seas building from 30 ft at 57S 179W aimed northeast. in the evening south winds to build in coverage at 35-40 kts with seas 32 ft at 53S 169W aimed northeast. On Thurs AM (6/25) the fetch is to hold at 35-40 kts with a core developing to 50 kts aimed north with 33-35 ft seas near 53S 150.5W aimed north to northeast. In the evening the gale is to start falling southeast but with 45 kt south winds still aimed north with 35 ft seas at 53.5S 142.5W aimed northeast. The gael is to fade while falling southeast from there.

On Sat AM (6/27) another gale is to form in the upper reaches of the Southeast Pacific with 45 kt south winds and seas 33 ft at 41S 129W aimed north. Fetch theoretically is to build to 50-55 kts in the evening with 42 ft seas at 42S 127.5W aimed north. Will believe it when it happens.


MJO/ENSO Forecast


La Nina Development Plateaus

The Madden Julian Oscillation 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.The paragraphs below analyze the state of the MJO in the Pacific and provide forecasts for MJO activity (which directly relate to the potential for swell production).

Overview: A double dip La Nina was in control through the Winter of 2017-2018. But warming started building along the South and Central American coast in early March 2018 associated with two upwelling Kelvin Waves, and continued trying to build over equatorial waters over the Summer and Fall, but not enough to declare El Nino and not coupled with the atmosphere. In January 2019, those warm waters were fading, but then rebuilt late in Feb associated with Kelvin Wave (#3). But as of early June 2019 warm water was 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. El Nino was dead. A bit of a recovery occurred during Fall of 2019, with weak warm water building in the Nino 1.2 region, but cool water held in a pool off Peru and had not changed until March 2020. By April the cool pool had collapsed with warm water starting to build on the equator.

Fall/Winter 2019/2020 = 5.0/4.0 (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 is assumed the PDO has moved to the warm phase in 2014 and that a weak borderline El Nino from 2018 faded out in the Fall of 2019. A La Nina like ocean temperature pattern developed in the equatorial East Pacific in the summer of 2019, then faded and returned to a neutral if not weak warm status during the Winter of 2019-2020. We have been suspecting a turn towards a La Nina like atmospheric pattern to develop in the late Winter/early Spring of 2020. Our best hope is that moderation from the warm phase of the PDO might tamp down development of a full blown La Nina as we move into 2020. Given all that, for 2020 there is decent probability for development of La Nina meaning a reduced number of storm days and storm intensity during the summer season, resulting in a below normal level of swell, with swell being below normal duration and period. And by the Fall and early Winter of 2020, the number of storm days, intensity and duration of those storms should fade even more, resulting in depressed swell production. This pattern is expected to hold through the end of 2020 if not longer.

KWGA/Equatorial Surface Wind Analysis & Short-term Forecast (KWGA - Kelvin Wave Generation Area - The area 5 degrees north and south of the equator from 170W to 135E)
Analysis (TAO Buoys): As of (6/19) 5 day average winds were solid from the east over the Eastern equatorial Pacific continuing over the Central Pacific then fading to light east over the Dateline and KWGA. Anomalies were neutral over the East equatorial Pacific continuing over the Central Pacific then turning modest westerly over the KWGA.
1 Week Forecast (GFS Model): On (6/20) moderate east anomalies were in the far west KWGA with light west anomalies over the dateline. The forecast calls for west anomalies holding for 2 more days, then fading out with east anomalies taking over and filling the KWGA on 6/22 holding through the end of the model run on 6/27 and with east anomalies building in strength the last 4 days of the model run filling the KWGA and also over the Central Pacific and weakly building most of the East Pacific.

Kelvin Wave Generation Area wind monitoring model: West and East

Longer Range MJO/WWB Projections:  
OLR Models: (6/19) A weak Inactive MJO pattern was filling the KWGA today. The statistic model indicates this pattern is to hold on day 5, fading out on day 10 and then neutral over the whole of the KWGA on day 15. The dynamic model indicates the weak Inactive Phase is to hold on days 5 and 10, then building slightly on day 15 and mostly filling the KWGA.
Phase Diagrams 2 week forecast (ECMF and GEFS): (6/20) The statistical model depicts the Active Phase was weak over the Central Indian Ocean today and is to slowly ease east and weaken and all but gone over the West Pacific at day 15. The GEFS model suggests the Active Phase stalling and retrograding west to North Africa and very weak at day 15.
40 day Upper Level Model (assumed to be a statistical mode and 1 week ahead of what is occurring at the surface): (6/20) This model depicts a very weak Active Phase over the Central and East Pacific today and is to push east moving over Central America on 6/30. A weak pulse of Inactive Phase is to move into the West Pacific 6/25 and tracking east pushing into Central America on 7/15. A secondary weak Active MJO is forecast developing over the far West Pacific 7/5 pushing slowly east and moving into Central America on 7/30. A moderate more cohesive Inactive Phase is to start building in the far West Pacific on 7/20 moving to the Central Pacific at the end of the model run.
4 Week CFS Model (850 mb wind): (6/19) This model depicts no coherent MJO signal over the KWGA today with a split of east anomalies over the West KWGA and west anomalies over the East KWGA. The forecast indicates a continuation of no MJO signal with west anomalies fading on 6/21 and modest to moderate east anomalies taking hold over the entirety of the Pacific filling it by 6/22 and if anything building in strength continuing through the end of the model run on 7/17.
3 Month CFS Model (850 mb wind): (6/18 - using the 4th/latest ensemble member): This model depicts a weak Inactive MJO building over the KWGA today with mostly weak east anomalies filling the KWGA. The forecast depicts the Inactive MJO is to hold while very slowly easing east through 8/23 with east anomalies building solidly in strength and coverage starting 7/30-8/29. An Active MJO is forecast developing in the far Indian Ocean starting tomorrow and pushing slowly west into the KWGA 7/30 then filling it by 8/29 and holding through the end of the model run on 9/17 but producing no westerly anomalies of interest in the KWGA. In short, only weak west anomalies in pockets around the 8/7-9/12 timeframe. Otherwise east anomalies are the rule. By 9/3 east anomalies anomalies are to be in control in the KWGA and over the entirety of Pacific holding through the end of the model run on 9/17. The low pass filter indicates a high pressure bias is developing over the dateline today and is to build steadily in coverage through the end of the model run with a second contour setting up on 7/6. A single contour low pressure bias is to appear over the Indian Ocean starting 8/1 building in coverage holding through the end of the model run. East anomalies that have been previously solid in the Indian Ocean are migrating east today into the Pacific are to set up on the dateline and points east of there by 6/26 and continuing if not building there for the foreseeable future fueled by the building high pressure bias contour. Based on this model it appears a clear transition to La Nina is starting today and is to become entrenched by mid-July.

CFSv2 3 month forecast for 850 mb winds, MJO, Rossby etc - Alternate link

Subsurface Waters Temps
TAO Array: (6/20) Today in the far West Pacific the 30 deg isotherm was steady at 161E. The 29 deg isotherm was pushing east to 172W. The 28 deg isotherm line was stable at 158W today. The 24 deg isotherm was no longer pushing into Ecuador but was reaching the surface at 124W. Anomaly wise, warm anomalies 0-1 deg C were isolated to the West Pacific reaching east to 140W, moving east from 150W 2 days ago. There were no warm anomalies east of there. Instead cool anomalies were upwelling to the surface from a large subsurface pocket of cool water -2 to -3 degs 150 meters deep from 180W to Ecuador. It is likely poised to continue upwelling to the surface over the coming weeks though continues to lose some of it's intensity today. The hi-res GODAS animation posted 6/12 indicates the same thing with cool water at depth erupting in the east to the surface between 85W-170W at -5 degs C. The GODAS animation appears to be 1 week behind the TAO data but also is more detailed and accurately modeled.
Sea Level Anomalies: (6/12) Negative anomalies at -5 to -15 cms were over the equatorial Pacific between Ecuador and 160W and holding coverage, with neutral anomalies pushing west to 165E (losing some ground there too) suggestive of a cool subsurface pool below the equator and mostly holding in coverage. Negative anomalies were also now building along and down the coast of Peru and up the coast of Central America to Mexico. Positive anomalies at +5 cms were effectively gone over the entirety of the equatorial Pacific and along Peru and Central America.

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: (6/19) The latest images indicate cold water was building solidly over the equator from Ecuador over the Galapagos and to the dateline, looking like the start of a La Nina pattern. Warm anomalies were gone off the coast of Chile up into Peru turning decidedly cooler and appearing to be feeding the cool stream. Warm water was off Central America reaching west to the dateline but only north of the equator, remnants of a fading El Nino like pattern. Overall the cool pool on the equator was unmistakable and building in coverage and intensity.
Hi-res 7 day Trend (6/19): A fading cooling trend is in place starting from North Peru and pushing north and west on the equator along Ecuador and out over the Galapagos out to 145W. Pockets of warming were on the equator in pockets from Ecuador to the dateline an taking over more coverage the past 2 days. The short term trend is looking like a push towards the development of La Nina with cool water over the Eastern Equatorial Pacific scraping any remaining warm equatorial water and pushing it quickly west to the far West equatorial Pacific, but weaker than days past. A mirror image of that cool trend is developing off Africa too.
Hi-res Overview: (6/19) A stream of cool water was entrenched along the coast of Peru lifting northwest to the equator from Ecuador west to the dateline and holding in coverage. Warmer than normal temps were stable north of the equator with cooler than normal water building on and south of the equator. Overall the data suggests a stable La Nina like pattern.
Nino1.2 Daily CDAS Index Temps: (6/20) Today's temps were rising slightly but still down at-1.227 after previously down at -1.511 on 6/16 and have been fading steadily since March 26. Overall the trend is fading from a warmer range near +0.6 degs between 2/25-3/26.
Nino 3.4 Daily CDAS Index Temps:
(6/20) Temps were rising slightly at -0.226 after bottoming out at -0.595 on 5/27. Overall the trend is on a firm downward trajectory after previously being in the +0.3 degree range in Feb., and up to the +0.5-+0.6 degree range 3/12-4/8.

Click for Full Sized Image Click for Full Sized Image

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

SST Anomaly Projections
CFSv2 Uncorrected Data (6/20) Actual temperatures were in the +0.65 deg range 1/1/2020 through 4/1/2020 then started falling hard down to -0.25 in late-May. The forecast depicts temps continuing to fall, down to -0.40 July 1, then continuing on a steady downward trajectory reaching down to -1.00 in early Sept and holding there through Nov, then starting to rebound in early 2021. According to this model sea surface temps should be falling strongly moving towards La Nina as Summer develops. All objective evidence indicates this is in-fact occurring.
IRI Consensus Plume: The June 19, 2020 Plume depicts temps are at -0.35 degs, and are to hold in that range into November then rising some to -0.1 by Feb 2021. The low outliers are the dynamic models (NCEP CFS, NASA GMAO and the COLA CCSM4) all suggesting solid La Nina. 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) (6/20): The daily index was negative today at -33.95. and has been solid negative for 7 days in a row. The 30 day average was falling to -8.16. The 90 day average was falling at -3.31, suggesting a neutral ENSO pattern was in control.
ESPI Index (like SOI but based on satellite confirmed precipitation. Positive and/or rising is good, negative and/or falling is bad): April 2020 -0.62, March -0.11, Feb +0.69, Jan +0.42, Dec 2019 +0.46, Nov +1.03, Oct +0.27 Sept +1.11, August +0.60, July +0.75, June -0.32, May +1.10, April +0.30, March +1.0, Feb +1.29, Jan +0.193. This index has been steadily positive but still indicates mostly ENSO neutral conditions (not El Nino).

Pacific Decadal Oscillation
Per NOAAs index recent values: Jan 2018 +0.29, Feb -0.19, Mar -0.61, April -0.89, May -0.69, June -0.85, July -0.09, Aug -0.43, Sept -0.46, Oct -0.75, Nov -0.78, Dec -0.12, Jan 2019 -0.18, Feb -0.50 Mar -0.23, April +0.10, May +0.14, June -0.11, July +0.44, Aug -0.14, Sept +0.05, Oct -0.96, Nov -0.28, Dec +0.01, Jan 2020 -1.17, This continues to look like the warm phase of the PDO. No consistently solid negative readings have occurred since Feb 2014
The Washington/JISAO index (Jan-Dec): Jan 2018 +0.70. Feb +0.37, Mar -0.05, April +0.11, May +0.11, June -0.04, July +0.11, Aug +0.18, Sept +0.09. No real negative readings have occurred since Dec 2013
The PDO turned from a 16 year negative run (Jan 98-Feb 2014) in early 2014 and has been positive ever since (other than a few months of negative readings in Fall 2016, the result of a turn towards La Nina). Looking at the long term record, it is premature to conclude that we have in-fact turned from the negative phase (La Nina 'like') to the positive phase (El Nino 'like'), but the data strongly suggests that could be a possibility. By the time it is confirmed (4-5 years out), we will be well into it.

See imagery in the ENSO Powertool 


External Reference Material: El Nino Southern Oscillation (ENSO), Madden Julian Oscillation (MJO), Pacific Decadal Oscillation (PDO), Southern Oscillation Index (SOI), Kelvin Wave

Powerlinessurf Jeff Clark Inside Mavericks

Local Interest

Stormsurf Video Surf Forecast for the week starting Sunday (6/21):
For automatic notification of forecast updates, subscribe to the Stormsurf001 YouTube channel - just click the 'Subscribe' button below the video.

- - -

NBC News - Climate Change and Surfing:

Stormsurf and Mavericks on HBO Sports with Bryant Gumbel

Mavericks Invitational 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


Contact | About | Disclaimer | Privacy
Advertise/Content | Links
Visit Mark Sponsler on Facebook Visit Stormsurf on Instagram Visit Stormsurf on YouTube
Copyright © 2024 STORMSURF - All Rights Reserved
This page cannot be duplicated, reused or framed in another window without express written permission.
But links are always welcome.
Buoys | Buoy Forecast | Bulletins | Models: Wave - Weather - Surf - Altimetry - Snow | Pacific Forecast | QuikCAST | El Nino | Tutorials | Great Circles | Calculator