Thursday, March 26, 2020
- Buoy 233 (Pearl Harbor Entrance)/Buoy 239 (Lanai)/Barbers Point (Buoy 238) : Seas were 6.0 ft @ 9.1 secs with swell 4.8 ft @ 8.8 secs from 161 degrees.
- Buoy 106 (Waimea): Seas were 6.9 ft @ 9.9 secs with swell 4.6 ft @ 9.3 secs from 35 degrees. Water temp 75.4 degs.
- Buoy 46025 (Catalina RDG): Seas were 5.5 ft @ 5.9 secs with swell 1.6 ft @ 16.3 secs from 238 degrees. Wind at the buoy was northwest at 18-21 kts. Water temperature 59.2 degs. At Harvest Buoy (071) primary swell was 4.4 ft @ 11.8 secs from 310 degrees. At Santa Monica (028) swell was 1.2 ft @ 17.0 secs from 224 degrees. At Oceanside (045) swell was 1.6 ft @ 18.0 secs from 215 degrees. Southward at Point Loma (191) swell was 5.1 ft @ 6.3 secs from 309 degrees.
- Buoy 46012 (Half Moon Bay)/029 (Pt Reyes): Seas were 7.8 ft @ 11.8 secs with swell 5.1 ft @ 9.7 secs from 303 degrees. Wind at the buoy (012) was northwest at 10-14 kts. Water temp 54.5 degs (013), 55.4 degs (012) and 56.8 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).
Summer - Head high or better.
Advanced: Winter - Swell and period combination capable of generating faces 1.5 times overhead to double overhead (7-10 ft)
Summer - Chest to head high.
Intermediate/Utility Class: Winter - Swell and period combination generating faces at head high to 1.5 times overhead (4-7 ft).
Summer - Waist to chest high.
Impulse/Windswell: Winter - Swell and period combination generating faces up to head high (1-4 ft) or anything with a period less than 11 secs.
Summer - up to waist high swell. Also called 'Background' swell.
Surf Heights for Hawaii should be consider 'Hawaiian Scale' if period exceeds 14 secs.
On Thursday (3/26) in North and Central CA windswell was producing waves at head high and soft but reasonably lined up with no wind early and glassy conditions. Protected breaks were waist to chest high and clean and soft and mushed but rideable. At Santa Cruz occasional sets were had high and lined up and clean. In Southern California/Ventura waves were thigh high or so and lumpy and warbled with clean surface conditions and no local wind. In North Orange Co surf was maybe waist high coming from the north and mushed and heavily textured from local northwest wind. South Orange Country's best summertime breaks was thigh high and blown out with northwest winds and whitecaps in control. North San Diego had surf in the waist high range and lined up but heavily textured and nearly chopped. Hawaii's North Shore was getting local windswell with waves chest high on the peak at top spots and clean and soft. The South Shore was getting the last of New Zealand swell with set waves chest high and clean and lined up but inconsistent. The East Shore was getting easterly windswell at 3 ft overhead and chopped with solid east-northeasterly trades in control.
See QuikCASTs for the 5 day surf overview or read below for the detailed view.
On Thursday (3/26) in Hawaii swell was fading along the south shore from a small gale that developed northeast of New Zealand Tues-Thurs (2/20) producing up to 39 ft seas aimed north targeting the Islands well. Sideband energy from that system was also hitting California. Otherwise in California northwest windswell was also hitting making for rideable waves at exposed breaks. No swell producing weather systems are immediately forecast in the North Pacific though some sort of a low pressure system gale is forecast Sun-Mon (3/30) in the Northern Gulf producing 16 ft seas aimed southeast. Down south gale formed in the far Southeast Pacific on Fri-Sat (3/21) producing up to 38 ft seas aimed north but well east of the SCal swell window targeting mainly Central America. A small gale developed on the eastern edge of the CA swell window on Tues (3/24) producing up to 33 ft seas aimed north. Swell is radiating towards CA and points south of there. And interestingly the models are now suggesting a storm forming southeast of New Zealand on Sun (3/29) lifting northeast through Tues (3/31) producing seas up to 52 ft aimed northeast. Something certainly to monitor. If that one materializes it would certainly signal the end of Winter and the official start of the Summer swell season.
See all the details below...
SHORT- TERM FORECAST
Current marine weather and wave analysis plus forecast conditions for the next 72 hours
On Thursday (3/26) the jetstream was weakly consolidated pushing east off Japan with winds to 110 kts forming a weak trough midway to the dateline then splitting heavily just beyond at 170E with the northern branch tracking hard north over the Central Aleutians up into the Bering Sea then turning southeast falling into the Central Gulf of Alaska and vaporizing. A weak backdoor trough just over North CA with the jet turning east and moving onshore over Central CA. The southern branch tracked east tracking south of Hawaii then lifted northeast joining the main flow pushing over Southern CA. There was no significant troughs and no support for gale development anywhere in the North Pacific. Over the next 72 hours more of the same is forecast with the Japan trough tracking slowly east and pinching off on Fri (3/27) before reaching the dateline no longer offering any hope while the backdoor trough pushes inland over Southern CA. Beyond 72 hours starting Sun (3/29) the jet is to be fully split over the width of the North Pacific with the split point starting over Vietnam and ending 200 nmiles off Pt Conception with nothing but support for high pressure indicated in between through Tues (3/31). On Thurs (4/2) the northern branch is to start sagging south over the Northwestern and Northern Gulf of Alaska with winds 110-120 kts forming a tight trough northwest of Hawaii perhaps offering a little window to support gale development. Otherwise nothing of interest is forecast.
On Thursday (3/26) no swell was in the water over the North Pacific with high pressure in control.
Over the next 72 hours no other swell producing weather systems are forecast.
Low pressure is forecast developing in the Northern Gulf of Alaska on Sun (3/29) producing 25-30 kt northwest winds producing 14 ft seas. fetch is to get a little more continuous on Mon AM (3/30) at 25-30 kts with seas pushing to 16 ft at 48N 140W aimed southeast. The gale is to start fading in the evening with 17 ft seas at 48.5N 135W aimed southeast. Windswell to possibly result for North CA on Tues-Wed (4/1).
North Pacific Animations: Jetstream - Surface Pressure/Wind - Sea Height - Surf Height
No tropical systems of interest are being monitored.
California Nearshore Forecast
On Thursday (3/26) high pressure and northwest winds were 10-15 kts for North and Central CA and 15+ kts for Southern CA forecast building to 15-20 kts later. Light rain expected on occasion for the Central CA coast. Light snow for the Sierra mainly late afternoon. Fri (3/27) north to northwest winds forecast at 15 kts for North CA and 15-20 kts for Central CA and 20 kts for Southern CA early and fading in NCal to 5 kts and 10-15 ks for Central CA and 15 kts for Southern CA later. Light rain for Cape Mendocino in the late evening. Sat (3/28) south winds are forecast at 10-15 kts for North CA and northwest 10-15 kts for Central CA 10-15 kts holding all day. Rain building for North CA pushing south to Morro Bay later. Light snow for the Sierra starting late afternoon peaking in the evening. Sun (3/29) northwest winds are forecast at 10-15 kts for North and Central CA and 10 kts for Southern CA and holding all day but building to 15 kts for Southern CA later. Rain for North CA reaching south to Southern CA late afternoon. Snow for all the Sierra on occasion through the day fading in the evening. Mon (3/30) southwest winds are to be 10-15 kts for North CA as low pressure moves into the Pacific Northwest building to 20 kts later and northwest 10-15 kts for Central CA holding all day. Rain pushing south into North CA terminating at the Golden gate early evening. No snow forecast for the Sierra. Tues (3/31) the low is to be fading out with northwest winds 10-15 kts for North and Central CA and 20 kts over Pt Conception. Rain down to Santa Cruz mid-day. Snow for the Tahoe northward through the day. Wed (4/1) high pressure returns with northwest winds 20 kts for North and Central CA all day. No precip with clearing skies. Thurs (4/2) no change is forecast with high pressure and northwest winds 20 kts all day for North and Central CA.
Total snow accumulation for the week for Squaw Valley, Sugar Bowl, Kirkwood and Mammoth at 13, 16, 11 and 5 inches respectively.
Snow Models: http://www.stormsurf.com/mdls/menu_snow.html (Scroll down for resort specific forecasts). Updated!
Swell from a gale that formed off New Zealand was fading in Hawaii and starting to hit California (See New Zealand Gale below).
Over the next 72 hours swell from small gael that formed in the far Southeast Pacific is radiating north towards CA (see Far Southeast Pacific Gale below).
And yet another small gale formed in the Southeast Pacific with swell from it also radiating north (See Southeast Pacific Gale below).
New Zealand Gale
Starting Tues AM (3/17) a small cutoff gale developed just east of North New Zealand producing a small area of south winds to 50 kts and seas 32 ft at 33S 177W aimed north. The gale tracked east fading some in the evening with 40 kt south winds and seas 29 ft at 33S 172W aimed north. On Wed AM (3/18) the gale is to track east-southeast with 45 kt south winds and seas building to 34 ft at 38S 166.5W aimed north. In the evening the gale slowly tracked east with 45 kt south winds and seas to 38 ft over a small area at 38S 162W aimed north. The gale started fading on Thurs AM (3/19) with south winds fading from 35 kts and seas fading from 36 ft at 38.5S 159.5W aimed north. The gale is to fade out after that. Possible swell radiating towards Tahiti and Hawaii.
Oahu: Residuals on Thurs (3/26) fading from 1.8 ft @ 13-14 secs (2.0-2.5 ft). Swell Direction: 187 degrees
Southern CA: Expect swell to be peaking on Thurs (3/26) 1.7 ft @ 16-17 secs (2.5-3.0 ft). Swell fading Fri (3/27) from 1.5 ft @ 15 secs (2.0-2.5 ft). Swell gone by Sat AM (3/28). Swell Direction: 220 degrees
North CA: Expect swell to be peaking on Thurs (3/26) 1.9 ft @ 16-17 secs (3.0 ft). Swell fading Fri (3/27) from 1.7 ft @ 15-16 secs (2.5 ft). Swell gone by Sat AM (3/28). Swell Direction: 220 degrees
Far Southeast Pacific Gale
A small gale formed on Fri AM (3/20) in the far Southeast Pacific off Chile with south winds 45 kts producing 30 ft over a tiny area at 49.5S 109W and well east of the Southern CA swell window. The gale built in the evening with a larger area of south winds at 45-50 kts and seas 37 ft at 44.5S 104W targeting Central America and Peru. The gale started fading Sat AM (3/21) with 40 kt south winds with seas fading from 38 ft at 41.5S 100.5W targeting primarily Peru. The gale dissipated in the evening no longer producing meaningful seas. Low odds of sideband swell radiating north towards Southern CA but far better for Mexico and Central America.
Southern CA: Expect swell arrival on late on Fri (3/27) building to 1.5 ft @ 18 secs late (2.5 ft). Swell peaking on Sat (3/28) at 1.6 ft @ 16-17 secs (2.5 ft). Swell fading on Sun (3/29) from 1.5 ft @ 14-15 secs (2.0 ft). Swell Direction: 168 degrees
North CA: Expect swell arrival on Sat (3/28) building to 1.4 ft @ 17-18 secs later (2.0-2.5 ft). Swell fading on Sun (3/29) from 1.3 ft @ 16 secs (2.0 ft). Swell Direction: 165 degrees
Southeast Pacific Gale
A small gale started building in the far Southeast Pacific Mon AM (3/23) producing south winds at 35-40 kts with seas building from 23 ft at 49S 138W aimed north. Fetch built in coverage while tracking east in the evening with seas building to 27 ft aimed north at 50S 130W aimed northeast. The gale built some more on Tues AM (3/24) on the eastern edge of the CA swell window with 40+ kt south to southeast winds and 28 ft seas building at 54S 122 W aimed north. Fetch is to be fading and tracking southeast in the evening at 40 kts with seas 32 ft at 50S 114W. The gale to fade and move east of the CA swell window from there. Possible small swell for CA and points south of there.
Southern CA: Expect swell arrival on Wed (4/1) building to 1.7 ft @ 17 secs late (2.5-3.0 ft). Swell building on Thurs (4/2) to 2.0 ft @ 15 secs mid-day (3.0 ft). Swell Direction: 188 degrees.
North CA: Expect swell arrival on Thurs (4/2) with swell building to 1.7 ft @ 17 secs (2.5-3.0 ft) mid-day. Swell Direction: 183 degrees
South Pacific Animations: Jetstream - Surface Pressure/Wind - Sea Height - Surf Height
Marine weather and forecast conditions 3-10 days into the future
Beyond 72 hours no swell producing weather systems are forecast.
Beyond 72 hours a broad storm is forecast developing well south of New Zealand and just off Antarctica on Sun AM (3/29) producing 45 kts southwest winds over a solid area and seas building from 33 ft at 65S 170W. In the evening winds to build to 55 kts from the southwest with seas building 48 ft at 64.5S 159W aimed northeast. The storm is to lift northeast on Mon AM (3/30) fading to gale status with southwest winds 45 kts and seas 50 ft at 60S 149W aimed northeast. In the evening the gale is to be fading with 35-45 kt southwest winds and seas dissipating from 40 ft at 55.5S 139.5W aimed northeast. Fetch is to be gone on Tues (3/31) with seas from previous fetch fading from 33 ft over a broad area at 53.5S 130W aimed northeast. Something to monitor.
Inactive MJO Fading - East Anomalies Still in Control
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 hold in a pool off Peru and has not changed as of late Jan 2020.
LONG-RANGE PACIFIC STORM AND SWELL GENERATION POTENTIAL FORECAST
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 and that a weak borderline El Nino from 2018 is fading out, but not yet completely gone, especially in the atmosphere. Likewise it looks like a La Nina ocean temperature pattern is developing in the equatorial East Pacific, with cooler than normal waters tracking west on the equator. We assumed El Nino like momentum will hold for a while in the atmosphere will take a while to sense that the ocean temperature pattern has changed. But once it does, a turn towards a La Nina like atmospheric pattern will start to develop. that transition is expected in the late Nov-early Dec timeframe. Even so, moderation from the PDO might prevent La Nina from fully developing. Given all that, there is decent probability for a normal start to the Fall surf season (in the Northern Hemisphere) meaning a normal amount of number of storm days and storm intensity, resulting in a normal levels of swell, with normal duration and normal period. But by mid-Dec 2019, the number of storm days, intensity and duration of those storms should start fading and as a result, swell production should fade slightly as well. This pattern is expected to hold through April 2020.
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 (3/25) 5 day average winds were strong from the east over the Eastern equatorial Pacific continuing over the Central Pacific and then solid east over the Dateline and the whole of the KWGA. Anomalies were moderate east over the far East equatorial Pacific fading over the Central Pacific and then modest to moderate easterly over the KWGA.
1 Week Forecast (GFS Model): On (3/26) moderate east anomalies were over the KWGA. The forecast calls for east anomalies weakening steadily in coverage and strength focused just west of the dateline and just barely present at the end of the model run on 4/3 with weak west anomalies developing just east of the dateline 4/1 and stronger in the far West KWGA starting 3/31.
Kelvin Wave Generation Area wind monitoring model: West and East
- Longer Range MJO/WWB Projections:
OLR Models: (3/25) A strong Inactive MJO was filling the KWGA. The statistic model indicates the Inactive Phase is to fade some on day 5 then losing more coverage and strength while moving over the dateline at day 10 and gone at day 15 with a neutral MJO pattern indicated. The dynamic model indicates almost exactly the same thing but with a weak Active Phase moving into the far West KWGA days 10-15.
Phase Diagrams 2 week forecast (ECMF and GEFS): (3/26) The statistical model depicts the Active Phase was modest over the Eastern Indian Ocean today and is to track east while loosing strength and very weak over the West Pacific at day 15. The GEFS model suggests the same thing, but with the Active Phase tracking a bit further east to the Central Pacific.
40 day Upper Level Model (assumed to be a statistical mode and 1 week ahead of what is occurring at the surface): (3/26) This model depicts the Inactive Phase was moderate over the far East Pacific and is to track east over the East Equatorial Pacific pushing into Central America 3/31. A moderate Active Phase is building over the far West Pacific today and is to push east while holding strength into Central America on 4/22. A modest Inactive Phase is to start building in the West Pacific on 4/26 moving east over the West Pacific at the end of the model run on 5/5.
4 Week CFS Model (850 mb wind): (3/25) This model depicts a weak Inactive MJO pattern fading and exiting east over the East KWGA today but with moderate easterly anomaly pattern filling the KWGA. The forecast indicates the Inactive Phase is to push steadily east and out of the KWGA on 3/28. A weak Active MJO pattern is to follow starting 3/28 in the West KWGA with weak west anomalies pushing east through 4/13. After that a dead neutral MJO signal is forecast with light east wind anomalies developing in the KWGA 4/19 through the end of the model run on 4/22.
3 Month CFS Model (850 mb wind): (3/26 - using the 4th/latest ensemble member): This model depicts a weak Inactive MJO pattern over the KWGA today with moderate east anomalies in the KWGA. The Inactive Phase is to hold through 4/3 with modest east anomalies in the KWGA fading on 3/28. Beyond a modest Active Phase is forecast developing 4/9 holding through 4/28 with moderate west anomalies in the KWGA during that period. An moderate Inactive Phase/Pattern is to develop 4/25 holding through 6/20 but with weak to modest west anomalies still in control (during the Inactive Phase - go figure). A weak Active Phase is to follow starting 6/10 holding through the end of the model run on 6/23 with weak to moderate west anomalies in the KWGA. The low pass filter indicates a low pressure bias with 2 contour lines in control of the KWGA centered on the dateline reaching east to the California coast. The second contour line is to dissipate on 3/27, with one contour line holding after that through the end of the model run. A high pressure bias previously built in the Indian Ocean last Fall and is to hold till June 21 then dissipate. East anomalies set up in the Indian Ocean starting 10/22/19 and held through Jan 10, then started to become more episodic and are to continue that way, but maybe again becoming consistent 4/19 through the end of the model run while west anomalies persist in the West Pacific, but slowly retrograding west, but still in the KWGA at the end of the model run. It looks like the high pressure bias/blocking pattern in the Indian Ocean is fading and the effect of the low pressure bias in the Pacific is to start fading too by early Summer, maybe.
CFSv2 3 month forecast for 850 mb winds, MJO, Rossby etc - Alternate link
Subsurface Waters Temps
TAO Array: (3/26) Today in the far West Pacific the 30 deg isotherm was steady at 165E. The 29 deg isotherm was steady at 177W today. The 28 deg isotherm line which previously was a brick wall aligned and steady at 163W was repositioned moving east to 150W but with most body still at 160W at depth today. The 24 deg isotherm was pushing into Ecuador. Anomaly wise, Kelvin Wave #6 was under the dateline at +2.0 degs tracking from the Maritime Continent under the dateline with it's leading edge pushing east to 103W today at +1 degs. Warm water was filling the entire equatorial subsurface Pacific from 150 meters upwards. The hi-res GODAS animation posted 3/19 indicates warm water had formed a Kelvin Wave with warm water falling from 120E down into the dateline at 180m deep peaking there at +2-3 degrees then pushing and rising east to 103W. A pocket of cool water was east of there associated with the upwelling phase of the previous Kelvin Wave Cycle. The GODAS animation appears to be 1 week behind the TAO data but also is more detailed and accurately modeled.
Sea Level Anomalies: (3/19) A previously broad pocket of +1-5 cm anomalies was fading on the equatorial Pacific between 150W pushing east to 110W.
Surface Water Temps
The more warm water in the equatorial East Pacific means more storm production in the North Pacific during winter months (roughly speaking). Cold water in that area has a dampening effect. Regardless of what the atmospheric models and surface winds suggest, actual water temperatures are a ground-truth indicator of what is occurring in the ocean. All data is from blended infrared and microwave sensors.
Hi-res Nino1.2 & 3.4: (3/25) The latest images indicate warm anomalies were modest along the coast of Chile up into Peru and building some from days past with building warm anomalies continuing up along Ecuador up into Central America. But 2 pockets of cool water were embedded and streaming to the west over the Galapagos to 107W. Markedly warmer water was aligned on the equator from there to the dateline. A broad pocket of cool anomalies was still south of the equator off Peru with a mirror image of it off California and Baja.
Hi-res 7 day Trend (3/25): Weak warming was building off Peru tracking west and also off Central America but far weaker tracking southwest converging at 110W and then tracking east from there to the dateline. An building pocket of cooling was developing pushing off Ecuador over the Galapagos and out to 120W on the equator. The short term trend is looking like developing cool tongue was building over the East Equatorial Pacific.
Hi-res Overview: (3/25) A pocket of cool anomalies is trying to hold south of the equator starting at 5S west of Peru between 100W and 140W. A mirror image of it was also off California and Baja Mexico out to 160W. But warm anomalies were building along Chile and Peru then stronger up to Ecuador and Central America up to Mainland Mexico out over the Galapagos. But a cool tongue was extending from Panama over the Galapagos to 110W. Warmer than normal water were tracking from the Galapagos out to the dateline and beyond. Water temps appear to be stable and neither El Nino or La Nina.
Nino1.2 Daily CDAS Index Temps: (3/26) Today's temps were falling some to +0.736, positive in that range since 2/28. Previously temps had been toggling near neutral. It now appears we are in a rising or at least warmer trend.
Nino 3.4 Daily CDAS Index Temps: (3/24) Temps were falling some at +0.606. Temps previously were in the +0.2 degree range but rose to the +0.4 degree range on 1/4 and have been holding steady ever since.
CFSV2 Forecast for Nino3.4 Sea Surface Temp (SST) Anomalies & Current SST Anomalies
SST Anomaly Projections
CFSv2 Uncorrected Data (3/26) Actual's indicate temperatures started rising in early Oct to +0.25 degs holding to Dec 1 then rising again to +0.65 degs Jan 1 2020 holding through Feb. From there temps started falling early March down to +0.5 degs. The forecast depicts temps falling, down to 0.0 in early May then diving negative appearing to be moving strongly to La Nina down at -1.5 in early Oct bottoming out at -1.55 degs early Nov and holding there. According to this model a neutral sea surface temperature pattern biased slightly warm is forecast for Spring of 2020 but falling strongly towards La Nina in the core of Summer.
IRI Consensus Plume: The March 19, 2020 Plume depicts temps are at +0.30 degs, and are to slow fade to neutral +0.00 in June 2020, then falling some to -0.15 degs in the October 2020 timeframe. 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) (3/26): The daily index was negative today at -10.34. The 30 day average was weakly negative at -3.86 and falling. The 90 day average was slowly rising at -2.28, suggesting a neutral ENSO pattern was developing.
ESPI Index (like SOI but based on satellite confirmed precipitation. Positive and/or rising is good, negative and/or falling is bad): Dec +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
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Surf Height-Swell Height Correlation Table