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Pacific Storm and Surf Forecast
Updated: Saturday, October 18, 2014 5:18 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
Swell Potential Rating = 3.5 - California & 2.4 - Hawaii
Using the 'Winter' 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 10/20 thru Sun 10/26

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   

Dateline/Gulf Swell Targets HI and CA
Weaker Gales to Follow in the Gulf

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.


Current Conditions
On Thursday (10/16) in North and Central CA surf was 3-4 ft overhead and lined up and reasonably clean coming from the Gulf but with some warble and lump in the water. Down in Santa Cruz surf was head high on the sets and clean but a little wonky. still not too bad for a weekend. In Southhern California up north surf was thigh to waist high and clean but inconsistent and weak. Just windswell. Down south waves were thigh high and clean but breaking right on the beach. Hawaii's North Shore was getting small northwest windswell with waves waist to chest high and clean but weak with new energy from the datleine starting to show at the buoys. The South Shore was getting no real swell with background energy producing knee high surf and clean. On the East Shore local windswell associated with Hurricane Ana was chest high and on the increase and chopped. 

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

Meteorological Overview
The extratropical remnants of Typhoon Vongfong redeveloped off Kamchatka on Wed (10/15) pushing over the Northern Dateline region on Thurs (10/16) with seas to 35 ft and were now tracking through the Gulf of Alaska with seas 28-30 ft. Swell is in the water pushing towards Hawaii and the US West Coast. A weaker and fragmeneted gale to develop in the Central Gulf Tues-Thurs (10/23) with seas 20-26 ft in pockets. And Hurricane Ana was just 125 nmiles southwest of Hawaii with winds 80 kts and expect to hold while pushing northwest tracking just generally 150 nmiles south of the remaining Hawaiian Islands.      

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

North Pacific

Jetstream - On Saturday (10/18) a consolidated jetstream was pushing off North Japan ridging gently tot he northeast reaching a point just south of the Central Aleutians then then falling southeast with winds building to 150 kts feeding a trouhg over the Central Gulf of Alaska. From there the jet ridged northeastand tracked into northern British Columbia. Decent support for gale development was exhibited in the Gulf trough. Over the next 72 hours that trough is to push east and move over Northern California on Monday PM (10/20) additional wind energy holding in the Gulf forming a secondary trough with winds to 140 kts on Tues PM (10/21). Limited support for gale development is possible. To the west the jet is to be ridging northeast pushing up into the Western Bering Sea. Beyond 72 hours that ridge is to sweep east with it's apex reaching the Eastern Aleutians on Fri (10/24) and weak with winds barely 90 kts. The remaining wind energy is to consolidate more and continune falling south into a trough over the Eastern Gulf at 120 kts then ridging up into Washington state. Decent supoprt for gale developoment still in the Gulf trough. That trough is to push east into next weekend (10/25) with a weak and diffuse jetstream pattern developing over the remaining Pacific offering nothing of interest in terms of support for gale devleopment. In short, the storm pattern is likelyh to fall appart long term.

Surface Analysis  - On Saturday (10/18) a gale low was tracking through the Gulf of Alaska generating swell boudn for Hawaii and the US West Coast (see Another Gulf Gale below).   

Over the next 72 hours the Gulf Gale is to fade and another small gale is to develop behind it in the Eastern Gulf starting Monday PM (10/20) with winds 35-40 kts over a tiny area generating 22 ft seas at 47N 151W targeting mainly the Pacific Northwest down into maybe Central CA. 40 kt northwest winds to build Tues AM (10/21) but only over a small area with seas increasing to 28 ft at 47N 142W (310 degs NCal). The gale is to lift northeast in the evening with winds still barely 40 kts and seas 28 ft over a tiny area at 50N 135W outside the NCal swell window and targeting only British Columbia south ot Vancouver Island. Perhpas a decent pulse of raw local swell to result for the Pacific Northwest with lesser energy down into Central CA.

Another Gulf Gale
The extratropical remnants of Typhoon Vongfong moved from a position just east of the Kuril Islands on Tuesday (10/14) pushing off  Kamchatka on Wed AM (10/15) with 45 kt west winds and turning east, with the core barely south of the Aleutians. By evening fetch built in coverage at 45 kt from the northwest
with the core of the low over the Aleutians and was approaching the dateline with seas 35 ft over a tiny area at 48N 171E (306 degs NCal, 324 degs HI). The core of the gale was tracking just south of the Central Aleutians near the dateline Thurs AM (10/16) generating 45 kt northwest winds and 35 ft seas at 47N 179E (305 degs NCal, 330 degs HI). In the evening this system was falling east-southeast with a broader fetch of 35 kt northwest winds just east of the dateline with 32 ft seas at 46N 173W (299 degs NCal, 336 degs HI). By Fri AM (10/17) the gale was regrouping with 35-40 kt northwest winds positioned in the Western Gulf with pressure dropping in the core of the low to 980 mbs and seas 28 ft at 43N 168W (294 degs NCal, 347 degs HI). 35 kt winds held in the lows west quadrant in the evening as it moved squarely into the Gulf with seas 26 ft holding at 43N 160W (292 degs NCal, 298 degs SCal). By Sat AM (10/18) the gale was build with 40 kt northwest winds in.cgiay over a small area embedded in a broader area of 35 kt winds and seas up to 28 ft up at 46N 154W (300 degs NCal, 303 degs SCal). Fetch is to be fading in the evening from 35 kts falling southeast with the gale moving east and seas still 28 ft at 43N 150W (294 degs NCal, 300 degs SCal). The gale is to still continue pushing east on Sun AM (10/19) with 30-35 kt northwest winds and 26 ft seas at 41N 145W (290 degs NCal, 297 degs SCal). This system is to be gone by evening. 

Small 18 sec period swell is already in the water from when this gale was approaching the dateline targeting Hawaii and the US West coast. And additional larger size relatively speaking is expected to result as this system tracks through the Gulf over the weekend while moving closer to both the Islands and the mainland. More swell generation is expectedible. Sideband energy is expected for Hawaii and more direct energy for the US West Coast.

Hawaii: Expect swell arrival late on Sat (10/18) with swell building to 3.6 ft @ 18-19 secs (5.5 ft). Swell to peak Sun AM (10/19) at 6.7 ft @ 15 secs (10 ft). Swell to fade on Mon (10/20) dropping from 5.3 ft @ 13 secs early (6.5-7.0 ft). Residuals into Tues (10/21) at 4.5 ft @ 11-12 secs (5 ft). Swell Direction: 324 degrees initially moving to 347 degrees  

North CA: Expect the first pulse of swell from when the storm was on the dateline arriving on Mon (10/20) at 3 AM with period 18 secs and size small but building. Size peaking near sunset at 6.5-6.9 ft @ 16 secs (10.4-11.0 ft). Shorter period energy from the 2nd pulse of the gale when it was in the Gulf arriving near sunset and building with swell peaking near 1 AM Tues (10/21) at 7.6-8.0 ft @ 15 secs (11.4-12.0 ft). swell still solid at sunrise at 7.5 ft @14-15 secs (10-11 ft). Periods and size fading through the day. Swell dropping Wed AM (10/22) from 6 ft @ 12-13 secs (7.5 ft). Swell Driection: 306 degrees initially turning to 290-294 degrees

Southern CA: Expect swell arrival near sunset on Mon (10/20) just past sunset with period 18 secs and size building. Swell 1 ft @ 18 secs (1.5-2.0 ft). Swell to build over night and start peaking surise Tues (10/21) as energy from the second pulse of the storm arrives with swell 4.4 ft @ 16 secs (7 ft faces) building some through the day pushing 4.9 ft @ 16 secs late (7.5-8.0 ft). Swell to be fading on Wed (10/22) from 4.7 ft @ 14 secs (6.5 ft). Residuals on Thurs (10/23) at 2.4 ft @ 12-13 secs (3 ft). Swell Direction: 309 degrees initially turning to 293-296 degrees

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

Tropical Update
Hurricane Ana was 150 nmiles south of Oahu on Sat AM (10/18) with winds 70 kts and seas 30 ft and holding. Ana was tracking west-northwest and expected to hodl strength and heading into early Sunday AM (10/19) positionted south-southwest of Kauai with winds 65 kts. A turn more to the west is expected later in the day as Ana moves west of the Islands and weakens some, then makes a turn to the northwest on Tues AM (10/21) and perhpas regains hurricane strength with winds to 65-70 kts by Wed-Thurs (10/23) and turning more to the north. The GFS model suggests Ana continuing to the north reaching 30N 170W by Sat (10/25). It is unclear what Anas track would be after that.        

California Nearshore Forecast
On Saturday AM (10/18) a weak nearshore pressure pattern was in.cgiay with light winds in control while a broad low was circulating in the Gulf of Alaska.  This low and associated front are to move into North CA on Sunday reaching down to Pt Reyes and holding through Monday as a secondary front moves into the coast. Light wind south of there. Rain to starting in NCal on Mon AM reach down to Monterey Bay late afternoon. Perhaps high pressure is to try and get a toe in the door on Tuesday AM with northwest winds 20 kts near Point Conception building northward late to the Golden Gate at 15 kts late, but advancing no further north with more low pressure deflecting in in the Gulf. Wednesday north winds to remain over Central CA at 15 kts fading on Thursday but still northerly 10+ kts. South winds are to be over extreme North CA on Wed and Thurs at 20 kts with perhpas light rain on Thursday evening. A light wind regime to hold thereafter but for light south winds for North CA on late Fri-Sat (10/25).

South Pacific

Surface Analysis  - No swell producing fetch was occurring and none is forecast for the next 72 hours.

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 the remnants of hurricane Ana are to track north moving to 30N 170W and stalling on Fri-Sat (10/25) with winds 45 kts. Something to monitor.

Another small gale is to try and wind up in the Gulf on Wed AM (10/22) with a small area of 35 kt northwest winds and 22 ft seas building at 45N 150W targeting mainly California. 35-40 kt northwest winds to fall southeast building a tiny area of 24 ft seas at 434N 143W again targeting mainly California. Winds to dissipate over night with seas on Thurs AM (10/23) fading from 20 ft at 42N 138W or 700 nmiles off the North CA coast. Maybe some raw 14 sec period swell to result. And yet another small local gale is forecast off CA on Sat (10/25).

Note: 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 equatorial Pacific it is in control of, and in it's Active Phase by slack if not an outright reversal of trade winds and enhanced 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.cgianet. 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. During the Inactive Phase the jet stream tends to .cgiit resulting in high pressure and less potential for swell producing storm development. 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).

Southern Oscillation Index (SOI) On Saturday (10/18) the daily SOI was up to -8.38. The 30 day average was down some at -4.01 and the 90 day average was down some at -7.37. The near term trend based on the 30 day average was indicative of a rebuilding Active Phase of the MJO. The longer term pattern was indicative of a steady-state Active Phase of the MJO. A weak low pressure regime is in control south of Tahiti and is forecast to continue for the next week with gently falling SOI numbers expected.    

Current equatorial surface wind analysis indicated neutral anomalies over the Maritime Continent turning weakly  westerly on the dateline continuing south of Hawaii. Neutral anomalies are indicated from there to the Galapagos. A week from now (10/26) weak east anomalies are forecast over the West Maritime Continent turning neutral east of there reaching to the dateline then turning very light westerly from the dateline extending to a point south of Hawaii and continuing mid-way to the Galapagos. A modest Westerly Wind Burst developed in the West Pacific 9/28-10/8, then faded. But residuals from it redeveloped over the dateline starting 10/12 and created another small WWB forecast to hold into 10/19.  This pattern suggests the area favorable for tropical development is between Hawaii and the dateline and is to continue shifting east. But down at the surface the TOA array indicates solid westerly anomalies over the entire West and Central equatorial Pacific. It is presumed an Active Phase of the MJO was in control there and is pushing east. 

Looking at the trend over the past few months there has not been a extended period of enhanced trades so far this year, and we're over 280 days into the year.  The trend is clearly towards westerly anomalies (suppressed trades) which suggests a bias towards El Nino. Big westerly wind bursts occurred Jan-April, followed by a neutral period May into early June. The TOA array surface sensors (the ground truth) indicated moderate westerly anomalies re-developed west of the dateline 6/25-7/6, then again 7/11-7/20, building into a WWB and holding through 8/10. Light westerly anomalies developed again 8/20-8/22, 8/29-9/2, 9/10-9/17, and stronger 9/20-10/8 (a WWB) west of the dateline with another starting 10/12 expected holding through 10/19. Neutral anomalies filled the gaps. A Kelvin Wave (modest at this point) is in-flight associated with westerly anomalies during June, July into mid-August and is impacting the Galapagos and another Kelvin Wave is developing in the dateline region being fed by westerly anomalies there. That's two WWBs over the past 20+ days. Compared to La Nina where enhanced trades (20+ kts) would be blowing non-stop, we're in great shape and have been all year. No easterly anomalies of interest have occurred all year. It would be hard to make a case stating some flavor of weak El Nino was not in.cgiay at this point.  

See our new Kelvin Wave Generation Area monitoring model here .

The longer range Outgoing Longwave Radiation (OLR) models (dynamic and statistical) run on 10/17 are generally in sync. They both suggest a modest Inactive MJO pattern over the West Pacific. Both the Statistic and Dynamic models depict this Inactive Phase to hold for the next 15 days if not weakening some and not tracking east any. The ultra long range upper level model run 10/18 depicts a modest Inactive pulse is in the West Pacific and is to track east reaching the East Pacific 11/5. A weak Active Phase to follow starting 11/2 in the West Pacific reaching the East Pacific on 11/27. Recent experience this year suggests this model overhypes any projected Inactive Phases. The models are calibrated assuming a neutral global weather pattern, and typically either overcall weather events during La Nina and undercall then during El Nino in the Pacific Basin. This suggests that warming water in the equatorial East Pacific is starting to have some gentle guiding impact on the atmosphere above. The upper level model tends to be a leading indicator, with surface level anomalies lagging behind 1 week or more.    

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.  As of the most recent low res imagery (10/16) a moderately warm water regime remains in control of the equatorial East Pacific, down some from the peak of the Kelvin Wave eruptions in late June in the east, but up some since early Sept and building slowly. TAO data suggests 0.5 deg C anomalies present from Central America to 120W, and then +1.0 deg anomalies from there west into 150E (Kelvin Wave Generation Area), suggesting more warm water is poised to track east. Contrary to expectations, warm water is NOT building on the surface in the NINO 3.4 region at the moment (nor is it fading). The warm water eruption from the most recent Kelvin wave seems to be near 130W.  

Elsewhere, the entire North Pacific Ocean is full of warmer than normal water. There are virtually no signs of high pressure induced upwelling streaming southwest off California. And serious warm water is entrenched along the California coast and building in coverage, the exact opposite of the trend of the past 3+ years.This is significant in that is suggests the Gulf of Alaska High pressure system is much weakened relative to normal years, with north winds and upwelling much suppressed. The South Pacific is mostly normal/neutral except for cool water streaming off Southern Chile pushing west reaching up to the equator near 140W. The significant feature of late is that this pocket is in rapid decline and being r.cgiaced with normal if not slightly warmer than normal waters. Given this situation, it suggesting a warm regime is getting the upper hand over the entire Pacific Basin, rather than isolated only to the North Pacific as it has been most of this year. Overall the total amount of warmer than normal water in the North Pacific remains most impressive, while the South Pacific is starting to trend in the same direction.  

Subsurface Waters Temps on the equator continue solidly warm.  As of 10/18 a +1.0 C anomaly flow was filling the equatorial Pacific from 150 meters up and east of 150E with two embedded pockets of +2 deg anomalies at 180W and 110W tracking towards the Galapagos. This is good news in that it indicates the pipe is open and at least one if not two Kelvin Waves are in flight. The leading edge of the first Kelvin Wave is theoretically now reaching the Galapagos (though there's no surface evidence of such). Satellite data from 10/10 depicts a broad area of +5 cm anomalies are covering the dateline region and tracking east reaching the Galapagos, indicative of a Kelvin Wave starting to impact that area.  This is as predicted. Other models collaborate the presumption of Kelvin Wave genesis. The latest chart of upper Ocean Heat Content (10/10) indicates the first modest Kelvin Wave has developed in the west reaching east to 100W but is making no easterly headway. A bit of a cooling follows (the presumable upwelling phase) and a new Kelvin wave is building back at 145E-175W, in sync with the satellite data and warmer and larger than this last one. It is assumed steady light westerly anomalies and 2 recent WWBs events over the past 20 days are feeding more warm water into the pipe. At this time we are well over the proverbial 'hump' and some sort of warm event is underway. As the first or the pair of Kelvin Waves arrives at the Galapagos now, more warm water will reinforce the existing warm pool theoretically pushing things into minimal El Nino territory. And if when the second Kelvin Wave pushes east (about 3 months from now or Feb 10) then we are set. Of course what is good enough to feed storm develop and what constitutes an official El Nino are two different things.  We are focused on the former. The quandary now is whether this will be a one year event, or something longer.    

Pacific Counter Current data as of 10/6 suggests an unchanged pattern. The current is pushing west to east over the entire Pacific north of the equator focused on the Intertropical Convergence Zone (ITCZ) reaching into Central America. If anything it's moving into the moderate to strong category from the West Pacific to a point south of Hawaii. On and just south of the equator the current was generally pushing east to west in the moderate category. Anomaly wise - west anomalies were just north of the equator over the width of the equatorial Pacific strongest between 130E-170E and in pockets reaching to the Galapagos. There were no significant east anomalies indicated. This data suggests a somewhat mixed picture but continued slightly better than the last update and improving incrementally.    

Projections from the monthly CFSv2 model run 10/18 are stable and in an interesting way. It suggests water temps have built to +0.5 deg C and are to slowly but steadily increase building to +0.75 deg C in early November and are to hold through the Winter into Spring. But the real interesting part is that water temps are hold decently if not start building from +0.8 degs in May 2015, pushing +1.2 degs C by July. This suggests that perhaps we are moving towards a multi-year warm event. See the chart based version here - link.

Analysis: A series of downwelling Kelvin Waves have been generated starting in Aug 2013, followed by a stronger one in Oct-Nov, and a massive one in Jan-April 2014. A weaker one followed in July with yet another developing in October. The only interruptions have been when the upwelling phase of the Kelvin Wave cycle took over. Water temps in the Galapagos-Ecuador-Peru triangle have held remarkably consistent from May-June 2014 onward, even during upwelling phases. Continued suppressed trades with embedded weak westerly anomalies developed in the West Pacific in July and have held through present time producing the latest Kelvin Wave with 2-3 degs C in flight now. Water temps have held in the Galapagos triangle in the +1.5 degree range for several months now. Certainly there is nor has been any signs of easterly anomalies or a shut down of the Kelvin Wave pipe for better than a year now. This is a huge step forward.

Assuming westerly anomalies continue in the Kelvin Wave Generation Area (west of the dateline), more warm water will migrate east. This seems reasonable seeing how there has been virtually no easterly anomalies for the first 9 months of this year. And trades tend to weaken during Fall months in the northern hemi, meaning we're just now starting to reach the point in time where Westerly Wind Bursts should have the best support for development. Most El Nino's do not develop till the Fall, including the Super El Nino of '83/83. Only a few (namely the '97 Super El Nino) developed and survived strong through the summer and over the span of an entire year. A more 'normal' development life cycle would favor the alternating 'downwelling/upwelling' Kelvin Wave cycle. See currently Upper Oceanic Heat Content chart here . Notice the alternating eastward migrating 'cool' and 'warm' cycles (upwelling/downwelling Kelvin Waves). Also note the CFSv2 model accurately depicted the upwelling Kelvin Wave Phase, with water temps in Nino1.2 fading in August then redeveloping in September. 

Finally, there's the 'feedback loop' consideration.  As far as we're concerned it is in.cgiay. The largest argument in favor of that is the total breakdown of the Gulf of Alaska high pressure system, resulting in very high water temps off California. Also the early season recurving of mult.cgie tropical low pressure systems tracking northeast off Japan bound for the dateline.  And the pulse of tropical activity near Hawaii on the week of 8/4 and those systems continued evolution in the West Pacific is most telling. And then the near record pulse of tropical activity off Mexico (8/18-9/20) resulting in Lowell, Super Hurricane Marie, followed by Odile and Polo (though these last 2 produced no swell) and finally Rachel. And then even a few inches of snow in the Sierra on Sept 27 and again on Oct 15. The last time any of this happened was during the '97 and '83 El Ninos. And now mult.cgie recurving tropical systems pushing off Japan reaching the Gulf of Alaska in October. The only argument against the feedback loop now is a weak west moving Pacific Counter Current (rather than flowing east).

Only once the ocean and atmosphere are co.cgied on a global level (that is, the ocean has imparted enough heat into the atmosphere to start changing the global jetstream pattern) can one begin to have confidence that a feedback loop is developing and a fully matured El Nino can result. About 3 months of undisturbed heating is required for the atmosphere to start responding on a global level where the point of 'no return' could be achieved from our perspective. The warm pool starting forming in earnest on 5/1, and so the atmosphere would not trip over the 'no-return' point till 8/1. We have passed that threshold. As of 9/2, all the arguments against a feedback loop being in.cgiace were gone except the Pacific Counter Current. 

Note that what we consider 'teleconnected' and what NOAA considers threshold El Nino conditions are two different things and serve different purposes. We are focused on monitoring weather events that contribute to the production of open ocean storms mainly in the Pacific Basin that may or may not have the same impacts as a full blown El Nino. So our criteria is certainly less than the threshold of NOAAs. That said, considering the size and duration of the westerly wind bursts in Jan-April, and the Kelvin Wave that preceded it, it seem hard to believe that at least some Pacific Basin wide 'change' was not already well entrenched even early this year, and had been developing since perhaps as early and Aug of 2013 (when the first Kelvin Wave of the series started taking shape). Monitoring the number, location and track of tropical systems in the North Pacific over October will help to put the final nail in coffin, though given the current track record, it is only a formality at this time. We will continue monitoring westerly wind anomalies and warm subsurface water buildup in and under the Kelvin Wave Generation area. Also monitoring of the NPac jetstream (which has already been productive) and Atlantic hurricane activity (which is nonexistent) are key. But at this time odds continue stacking up in favor that a global teleconnection is now established. If that's true, the focus then becomes estimating how deep the ENSO cycle will become, or whether it will stay shallow but transition into a multi-year event. At this time we're predisposed to the multiyear, Midoki scenario. And that is actually the better of all options.    

At a minimum the ocean is well past recharge mode, with cold water from the multiyear 2010-2013 La Nina cycle dispersed and temperatures on the rise. Officially we are still in a neutral ENSO atmospheric pattern, with no El Nino in.cgiay. But given all current signs, from a winter storm and swell production perspective, atmospheric transition is well underway.  Even if we never reach official El Nino status  this is a far better.cgiace than previous years (2010-2011, 2011-2012 and 2012-2013) under the direct influence of La Nina. Still lingering concerns about what appears to be a decadal bias towards a cooler regime (since 1998) will temper our forecasts.

See imagery in the ENSO Powertool and more details in the  El Nino Update Updated 12/4/13 


South Pacific

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

Details to follow...


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

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