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Pacific Storm and Surf Forecast
Updated: Tuesday, June 13, 2023 1:30 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
1.8 - California & 1.0 - 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 6/12 thru Sun 6/18
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   

Weak Gale Fading in SE Pacific
Another Forecast for South Central Pacific

BUOY ROUNDUP
Tuesday, June 13, 2023 :

  • Buoy 238 (Barbers Pt)/Buoy 239 (Lani): Seas were 2.6 ft @ 12.5 secs with swell 1.5 ft @ 13.1 secs from 194 degrees. Water temp 78.6 degs (Barbers Pt), 78.1 (Pearl Harbor 233), 79.0 (Lani 239).
  • Buoy 106 (Waimea): This buoy is down. Using Buoy 202 (Hanalei): Seas were 5.3 ft @ 8.3 secs with swell 3.5 ft @ 8.0 secs from 92 degrees. Water temp 77.9 degs
  • Buoy 46025 (Catalina RDG): Seas were 2.5 ft @ 13.7 secs with swell 1.8 ft @ 13.8 secs from 172 degrees. Wind northwest at 4-6 kts. Water temperature 63.5 degs, 62.2 (Topanga 103), 62.2 degs (Long Beach 215), 63.9 (Oceanside Offshore 045), 63.0 (Del Mar 153), 63.9 (Torrey Pines Outer 100). At Harvest Buoy (071) primary swell was 3.4 ft @ 10.3 secs from 302 degrees. At E. Santa Barbara (46053) swell was 1.4 ft @ 10.1 secs from 272 degrees. At Santa Monica (028) swell was 1.1 ft @ 15.8 secs from 209 degrees. At Oceanside (045) swell was 1.9 ft @ 13.8 secs from 194 degrees. Southward at Pt Loma (191) swell was 2.4 ft @ 14.6 secs from 178 degrees. Water temperature was 63.1 degrees.
  • Buoy 46012 (Half Moon Bay) Out of Service /029 (Pt Reyes): Seas were 4.7 ft @ 11.8 secs with local northwest windswell 3.2 ft @ 8.8 secs from 313 degrees and southern hemi swell 1.4 ft @ 15.7 secs from 189 degrees. Wind west at 4 kts (46026). Water temp 53.6 (Bodega Bay 46013), 54.1 degs (Pt Reyes 029), 57.2 (San Francisco 46026), 57.4 (SF Bar 142), 59.9 (Pt Santa Cruz 254) and 57.7 (Monterey Bay 46042).

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).
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.

PACIFIC OVERVIEW
Current Conditions
On Tuesday (6/13) North and Central CA were near flat and warbled from southwest wind. Protected breaks were waist high on the sets and somewhat lined up and fairly clean but soft. At Santa Cruz surf was waist to maybe chest high with a few walls and clean but pretty soft. In Southern California/Ventura waves were waist to maybe chest high and somewhat lined up and fairly clean with decent form but weak. Central Orange County had sets at chest to shoulder high and reasonably lined up coming from the south and textured from south wind. South Orange County's best summertime breaks had sets at head high or slightly more on the peak and lined up with decent form but pretty warbled. North San Diego had sets at waist high and somewhat lined up and soft and warbled. Hawaii's North Shore had a few thigh to waist high sets and fairly clean and soft. The South Shore had some thigh high sets and soft and clean. The East Shore was getting east windswell at waist to chest high and chopped from moderate east trades.

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

Meteorological Overview
On Tuesday (6/13) California was getting some background southern hemi swell but nothing of real interest. A gale developed again in the Southeast Pacific tracking northeast Sun-Tues (6/13) producing 26-28 ft seas aimed northeast. Tiny swell is pushing northeast towards CA and South and Central America. And a small gael is forecast in the upper reaches of the Central South Pacific Sat-Tues (6/20) producing 26-28 ft seas aimed weakly north. Up north the remnants of Typhoon Guchol were recurving northeast off Japan on Tues (6/13) and expected to fade before possibly redevelop weakly on the dateline Fri (6/16) generating 23-24 ft seas aimed southeast at Hawaii. Will believe it when it happens. But, the fact that 2 systems (Mawar was the 1st) have now recuved northeast (in June no less) is impressive and suggests El Nino is already starting to have some influence over the far West Pacific. This is a good sign. The atmosphere is starting to transition.

See all the details below...

 

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

North Pacific

Overview
Surface Analysis
On Tuesday (6/13) no meaningful swell of interest was hitting
Hawaii or California generated from the Northern Hemisphere.

Over the next 72 hours no swell producing weather systems of interest are forecast.

 

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

 

Tropical Update
Typhoon Guchol was 300 nmiles south of South Japan on Tues AM (6/13) with winds 45 kts tracking northeast. Guchol is to be accelerating off to the northeast over the next 48 hours and weakening moving towards the dateline. Beyond starting early Fri (6/16) the GFS model suggests it's Guchols remnants are to rebuild on the dateline producing northwest winds at 35-40 kts and seas building to 23-24 ft at 36.5N 176.75E, then dissipating in the evening. Tiny swell could arrive in Kauai maybe on Mon AM (6/19) with luck. But the odds of any of this occurring are very low at this early date. Regardless, the real story is that Guchol is the second in a series of West Pacific tropical systems that have recurved to the northeast. This suggests El Nino is gaining influence in the atmosphere in the West Pacific. And what's more interesting is that all this is occurring in June (very early). Normally one would not see this until August and that only in a very strong El Nino scenario.

Otherwise no tropical systems of interest are being monitored at this time.

California Nearshore Forecast

  • Wed AM (6/14) northwest winds build to 25-30 kts for Cape Mendocino with a weak eddy flow nearshore early. Winds building to 30-35 kts over Cape Mendocino in the afternoon. Windswell building steadily.
  • Thurs AM (6/15) northwest winds to hold at 35 kts for Cape Mendocino with a light eddy flow for the rest of California. In the afternoon northwest winds fade some over Cape Mendocino at 25-30 kts with the eddy flow holding south of there. Windswell fading some.
  • Fri AM (6/16) northwest winds to be up to 30 kts for Cape Mendocino over a small area with an eddy flow for the rest of the CA coast. In the afternoon northwest winds to fade at 20 kts limited to Cape Mendocino with the eddy flow holding south of there. Windswell production fading to near nothing.
  • Sat AM (6/17) northwest winds to hold over most of North CA at 20 kts with a light northwest flow over Central CA. In the afternoon northwest winds to start building in coverage over North CA at 20 kts and 15 kts down over Central CA. Northwest windswell holding.
  • Sun AM (6/18) northwest winds hold at 15-20 kts for North CA and 10-15 kts for Central CA. No change in the afternoon. Minimal raw windswell forecast.
  • Mon AM (6/19) high pressure starts building into CA with northwest winds 15 kts for North CA and 20 kts for Central CA. In the afternoon northwest winds to build at 20 kts for North CA and 20-25 kts for Central CA. Raw windswell building some.
  • Tues AM (6/20) northwest winds are forecast at 20-25 kts over North and Central CA but focused more of Central CA. More of the same in the afternoon. Junky raw windswell forecast.

Total snow accumulation for the next 10 days respectively for Squaw Valley, Sugar Bowl, Kirkwood and Mammoth are projected at 0, 0, 0, and 0 inches.

Freezing level is 12,5000 ft today and is to hold through 6/17, then falling to 9,000 ft on 6/18 before building again to 12,500 ft by 6/21. Steady snow melt to continue at elevation.

- - -

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')

Snow Models: http://www.stormsurf.com/mdls/menu_snow.html (Scroll down for Resort specific forecasts).

 

South Pacific

Overview
Jetstream
On Tuesday (6/13) the jetstream was split over the South Pacific with the southern branch very weak and almost non-existent running east on the 55S latitude line and the northern branch stronger at 150 kts running east on the 27S latitude line. No troughs or support for gale development were indicated over the South Pacific. Over the next 72 hours no change is forecast. Beyond 72 hours starting Sat (6/17) the southern branch of the jet is to start forming a ridge southeast of New Zealand with a trough building ahead of it lifting north being fed by 120 kts winds perhaps offering some support for gale development while tracking east into Tues (6/20). Will monitor this situation.

Surface Analysis
No meaningful swell of interest was hitting California or Hawaii today.

Over the next 72 hours swell from a weak gale previously in the Southern Pacific is to be propagating northeast (see Weak Southeast Pacific Gale below).

 

Weak Southeast Pacific Gale (7th in a Series)
A weak gale developed over the Southeast Pacific (again) on Sun AM (6/11) producing a broad fetch of southeast winds at 35 kts with seas building from 23 ft at 54S 143W aimed northeast. In the evening winds built at 40-45 kts over a small area lifting northeast with seas 25 ft at 54S 130W aimed northeast. On Mon AM (6/12) fetch is to be tracking east with southwest wind 40 kts and seas 28 ft at 53S 132W and 55S 120.5W aimed northeast. In the evening the gale was tracking east with southwest winds 35-40 kts in pockets on the eastern edge of the CA swell window and seas 27 ft at 49S 122W aimed northeast. On Tues AM (6/13) the gale pushed east of the Southern CA swell window and was fading. Something to monitor.

Southern CA: Expect swell arrival on Tues (6/20) building to 2.0 ft @ 16-17 secs later (3.0 ft). Swell continues on Wed (6/21) at 2.0 ft @ 15-16 secs fading some later (3.0 ft). Swell fading on Thurs (6/22) from 1.9 ft @ 13-14 secs (2.5 ft). Swell Direction: 190 moving to 185 degrees

North CA: Expect swell arrival on Tues (6/20) building to 1.5 ft @ 17 secs later (2.5 ft). Swell continues on Wed (6/21) at 2.0 ft @ 15-16 secs fading some later (3.0 ft). Swell fading on Thurs (6/22) from 1.8 ft @ 13-14 secs (2.5 ft). Swell Direction: 187 moving to 183 degrees

 

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

 

QuikCAST's

 

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

North Pacific

Beyond 72 hours no swell producing weather systems of interest are forecast.

 

South Pacific

Beyond 72 hours a gale is to develop over the upper reaches of the Central Pacific on Sat (6/17) producing a steady fetch of southerly winds with seas in the 25 ft range aimed north initially near 39S 153W tracking slowly east then rebuilding late Mon (6/19) with seas to 29 ft at 43.75S 132.25W aimed north. This is a long ways from actually forming.

 

MJO/ENSO Forecast

 

El Nino Building at the Oceans Surface and Trying to Couple with the Atmosphere
Kelvin Wave #4 Poised to Erupt - Kelvin Wave #5 Developing in the West - Active MJO #6 Done Likely Producing Another Kelvin Wave
NINO3.4 In El Nino Territory and Rising While Expanding Fast

1 Kelvin Wave traversed the Pacific in Dec '22 with a 2nd in Jan-Feb and a 3rd and 4th in March-April and a 5th developing now. And Westerly Winds are fully established filling the KWGA. Sea Surface Temperatures continue warming. The last link in the chain is to see the SOI falling deep into negative territory which it appears it is doing. The atmosphere is starting to become coupled with the ocean. The outlook is 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. That basically continued until late Fall 2022 when trades started fading and by early 2023 multiple Kelvin Waves were in flight with significant warming developing over the East Equatorial Pacific. La Nina was dead on 3/18/2023 with El Nino apparently developing.

LONG-RANGE PACIFIC STORM AND SWELL GENERATION POTENTIAL FORECAST
Summer 2023 = 3.7 (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: A 3 year La Nina started fading in Jan 2023 and was gone by April. 3 Active MJO's produced 3 Kelvin Waves with the 3rd in that series poised to start erupting off Ecuador now (May 2023). The CFS model is predicting steady west anomalies from here forward and the leading edge of the low pressure bias on the dateline and forecast to nearly fill the Pacific during June. We are in a state of transition from ENSO neutral to El Nino during the summer of 2023. As a result we will be moving from a period of reduced number of storm days and storm intensity during the early part of Summer towards a period of enhanced storm production starting Late July and beyond, getting fairly intense come Fall. This should result in a slightly below normal level of swells, with swells being below normal duration and period over early Summer. But by late July 2023, the number of storm days, intensity and duration of those storms should start improving as El Nino starts getting a solid footprint on the atmosphere. 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 late July 2023. The swell pattern will be normal to somewhat below normal before July and above normal after July 23. And By Sept, the El Nino footprint should be solid. Of course this is all highly speculative at this early and based mostly on the CFS model and it's projection of a building ENSO footprint getting solid by Sept.

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 (6/12) 5 day average winds were moderate to strong from the east over the East equatorial Pacific and moderate to strong east over the Central Pacific and moderate east over the KWGA. Anomalies were light east over the East equatorial Pacific and light east over the Central Pacific and neutral over the KWGA. Westerly anomalies were moderate to strong May 10 thru May 30 in the KWGA likely producing another Kelvin Wave. (Note: These are 5 day average winds, versus realtime, so they lag what is happening today (by about 2.5 days).
2 Week Forecast (GFS Model): (6/13) Modest east anomalies were filling the KWGA and moderate over the dateline. East anomalies are to slow ease east limited to the dateline and points east of there on 6/22 at weak strength then moving east of the KWGA on 6/25. West anomalies are forecast moving into the West KWGA on 6/14 at modest strength and then slowly building in to the east filling it to the dateline on 6/25 and holding through the end of the model run on 6/29. It looks like a weak Inactive Phase of the MJO is to develop for 2 weeks, but then being overtaken by a new Active Phase.

Kelvin Wave Generation Area wind monitoring model: West and East

MJO/WWB/Wind Projections:  
OLR Models: (6/12) A neutral MJO to slightly weak Active MJO was over the West KWGA today. The statistical model indicates a weak Active MJO is to slowly build over the KWGA filling 60% of it on day 10 and then all of it on day 15 of the model run. The dynamic model indicates a neutral MJO pattern holding the next 15 days.
Phase Diagrams 2 week forecast (CA and GEFS): (6/13) The statistical model depicts the Active signal was modest over the West Maritime Continent and is to track east to the far East Maritime Continent 15 days out and very weak. The dynamic model indicates the Active Phase is to move to the West Pacific but exceedingly weak over the next 15 days.
40 day Upper Level Model (assumed to be a statistical mode and 1 week ahead of what is occurring at the surface): (6/13) An solid Active (wet) pattern was over the KWGA. The forecast has the strong Active Phase (wet air) pushing east over the KWGA through 6/18 and then over the East Pacific 6/23 through 7/8 and weakening some before moving into Ecuador. The Inactive Phase (dry air) is to start building weakly over the KWGA on 7/3 and tracking east and over the KWGA through 7/18 then filling the Pacific through the last day of the model run on 7/23.
4 Week CFS Model (850 mb wind): (6/12)
Today a mix of weak west and east anomalies were over the KWGA with a weak Inactive Phase of the MJO over the West KWGA. The forecast indicates the Inactive MJO signal is to ease east then fade on 6/25. A mix of east and west anomalies are to hold over the KWGA through that window with one small pocket of east anomalies on the dateline 6/18-6/26. After that west anomalies start building and holding over the dateline 6/27 at moderate strength through the end of the model run on 7/10 with nary a hint of easterly anomalies forecast.
3 Month CFS Model (850 mb wind):
(6/11) - 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 Inactive Phase of the MJO was building over the KWGA but with weak west anomalies in control. The Inactive Phase is to slowly traverse the KWGA through 7/7 but with west anomalies weakly in control. The Active Phase is to start building 6/29 and filling the KWGA and holding through the end of the model run on 9/10. West anomalies are to build to strong status 7/20-8/16, then fading to moderate strength through the end of the model run. A strong El Nino is potentially developing. The shift to El Nino started on 2/15. The low pass filter indicates a high pressure bias with 1 contour line centered at 115W with its western perimeter at 127W today and well east of the KWGA and moving east to 125W and tracking slowly east from there and of no real interest at this point. A broad low pressure bias is established over the West KWGA centered at 165E with 2 contour lines and it's leading edge east of the dateline at 150W today (it started pushing east on 2/15). A hard push east is occurring and is to continue into 7/5 with it's leading edge then stalling at 135W filling most of the Pacific with a third contour lined developing on 6/29 with the primarily contours leading edge locked at 130W at the end of the model run with it's center at 170E. This is all a big deal and is being repeated in some form consistently from one run of the model to the next since Oct 2022. It appears a strong El Nino is developing.

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

Subsurface Waters Temps
TAO Array: (6/13) Today in the far West Pacific the leading edge of the 30 deg isotherm was present and steady at 171E with the 29 degree isotherm easing racing east at 157W (previously 176W). The 28 deg isotherm line was running east to 112W. The 26 degree isotherm has pushed the whole way across the Pacific and getting deeper. Anomaly wise, warm anomalies at +2 deg C were in a river traversing the Pacific with no breaks, A building pocket of +3 degree anomalies was in the west (Kelvin Wave #5) centered at 165W and 3-5 degs anomalies in the far East Pacific starting at 137W and back-building. Amazing. The hi-res GODAS animation posted 6/7 indicates a huge very warm stream of +2-3 degs anomalies extending from the far West Pacific and building while tracking east and then upwards from there over the far East Pacific with +4-5 degs anomalies from Kelvin Wave #3-4 erupting there into Ecuador. A new Kelvin Wave was building on the dateline at +3-4 degs (Kelvin Wave #5) while another pocket of warming waters were in the West Pacific at 120E at +2 degs (Kelvin Wave #6). No cool anomalies were indicated. El Nino is developing. The GODAS animation is 1 week behind the TAO data but also is more detailed and accurately depicted since its satellite based.
Sea Level Anomalies: (6/7) Sea heights were positive across the equatorial Pacific at +5 cms solid with a pocket of +10 cm anomalies in the west near 170E connected to another at +1- cms along the Ecuador coast extending north into Central America and south to Chile. This means no cool water was at depth. Per the Upper Ocean Heat Anomaly Histogram warm water continues building in intensity and coverage at +1.00-2.00 degs over the East Pacific from 127W a point east of there and +1.5 degs in the West at 160E with +0.5 degree anomalies connecting the two. There's been no change since mid March, a steady flow of warm water pushing east.

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: (6/12) The latest images depict a strong warm signal building along the coasts of Peru and Ecuador with lesser but still serious heat extending up Mexico reaching the tip of Baja with a building tongue extending west over the Galapagos continuing along the equator now reaching west to 165W (previously 155W) and a warmer core to 145W. Warm temps continued west from there on the equator across the dateline and beyond. This is a clear and building El Nino signal. And warmer than normal temps were present well off the coasts of Chile and Peru. The classic El Nino triangle was developing. The last remnants of La Nina are gone on the equator but remnants are still evident along the California and Baja coast with cold temps and the normal Springtime upwelling pattern in control there and likely be reinforced over the next week.
Hi-res 7 day Trend (6/12): There was effectively a neutral pattern over the east equatorial Pacific and a small area of cooling near 140W. It's not surprising there's no clear signal of warming along Ecuador because temps are already so warm they can't get much warmer. A neutral trend was along the coasts of Chile and Peru. The pattern of adding energy to the warm surface pool is stable. A warming trend had been well entrenched over the East Pacific since Nov 1 with no cooling waters over the equatorial East Pacific since 12/15 except for the time frame from 4/23 to today.
Hi-res Overview: (6/12) Warmer than normal waters are filling the East Pacific off Chile, Peru, Ecuador and north up to Mexico with strong warming in a few pockets along the immediate cost of Peru and Ecuador. And the classic El Nino tongue of more intense warming is building considerably over the equator west to 165W and from there to the dateline and beyond. No cool waters were on the equator anymore. There no sign of La Nina on the oceans surface and everything is now looking like El Nino. The east equatorial Pacific is steadily warming.
Nino1.2 Daily CDAS Index Temps: (6/13) (These temps are biased high by about 0.2 degs compared to official sources). Today's temps are building at +2.7926 and have been up in the +2.0 to +3.0 degs range since 4/1 having previously peaked at +2.891 (4/13). Previously temps reached +2.302 degrees on 4/6, +1.732 degs (3/22), up from +0.462 since 2/28. Temps had reached as high as +1.076 on 2/19 and were previously steady at +0.848 since 2/7. Previously they started steadily rising 11/13 when they were around -1.5 degs C.
Nino 3.4 Daily CDAS Index Temps:
(6/13) (These temps are biased high by about 0.2 degs). Today temps are falling some today at +0.715 after rising to +0.975 on 6/9. We are now 16 days into a trend of being above the El Nino threshold (for the 2nd time). Temps reached the El Nino threshold for the first time on 5/17 at +0.507 then quickly fell over the next 10 days down to +0.378 (5/26). Previous peaks of +0.318 on 4/30 besting the previous peak at +0.199 on 4/21. Temps have been steadily increasing hitting 0.0 on 4/12 and were then more or less steady the previous 4 weeks. Temps previously rose to -0.402 on 2/23. Temps rose above the La Nina threshold (-0.5 degs) on 2/22 and had been rising slowly since 2/12 when they were about -1.0 degs C. They had been in the -1.0 deg range since at least Nov 2022.

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 Data (Nino3.4 Region)
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 but then slowly rising to -0.75 degs in Jan 2023 and up to -0.5 degs (above the La Nina threshold) on 2/12. Temps were +0.45 degs today.
Forecast (6/13) - Temps are above ENSO neutral at +0.7 degs and are forecast rising to +1.20 degs in July and +1.90 degs in Nov and solidly into El Nino territory. The PDF Corrected forecast suggests temps are forecast rising to +1.00 degs in July and +1.50 degs in Nov/Dec. According to this version of the model we are building into El Nino through the Summer. But max temps are down from previous runs.
IRI Consensus Plume: The May 19, 2023 Plume depicts temps are +0.761 degs today and it's the third month above the La Nina threshold. Temps to rise steadily from here forward to +1.153 in July and up to +1.269 degrees in Aug/Sept then fading from there. The dynamic model suggest temps peaking at +1.672 in Oct. The CFS model is on the upper range of all models. This model suggests were are transitioning to El Nino.
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 (6/13) the Daily Index was negative at -1.69 but had been positive 5 days previous and then negative for 27 days previous to that ending 6/6 with a peak down to -29.32 on 5/31, -64.63 on 5/24 and -31.31 on 5/12. Previously readings were toggling between +10 and -10 for 13 days, but negative the 15 days previous to that, positive the 6 days prior to that after being mostly negative 25 days before that. It fell to -19.40 on 4/2. -17.44 on 2/22, the beginning of a change from which no return seemed likely. It was up to +21.85 on 2/10 and +55.74 on 12/22 and were in the +20 range the previous 22 days.
The 30 day average was rising from -13.83 and the most negative in years. It previously had been falling to -4.13 on 4/4 (lagging indicator driven by the Active Phase of the MJO) after falling to -0.52 on 3/22 previously 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 rising at -6.67 and turned negative the first time in years on 5/12. A recent max low was -7.57 on 6/6. It previously peaked at +14.63 on 2/20, +15.61 on 10/25 and +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 suggests that the Active Phase occurring now is starting to drive the index down, hopefully with no upward trend in sight for at least a year.

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 


Powerlines Jeff Clark Inside Mavericks

Local Interest
Stormsurf Video Surf Forecast for this week. See it Here
For automatic notification of forecast updates, subscribe to the Stormsurf001 YouTube channel - just click the 'Subscribe' button below the video.

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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:
http://www.bloomberg.com/video/how-to-predict-the-best-surfing-waves-EsNiR~0xR5yXGOlOq2MqfA.html
http://www.cbsnews.com/videos/surfs-up-for-mavericks-invitational-in-calif/

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

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