August 31, 2018 — SEAFOOD NEWS — As salmon and tuna seasons wind down and Dungeness crabbers start thinking about the winter fishery on the West Coast, some wonder: Will El Niño return?

Recent news articles have reported a 70 percent chance of warm waters in the equatorial Pacific will affect the West Coast.

On land, that could mean a dry winter coming after a summer and fall in which smoke from wildfires filled the skies in the West. On the ocean, it could mean warmer waters that may temporarily disrupt an environment that is accustomed to cooler waters. Some fisheries could benefit months or years after an El Niño. Others — some the most commercially important — may have difficult seasons ahead.

“In summary, there is ~60 percent chance of El Niño in the Northern Hemisphere [of] fall 2018 (September-November), increasing to ~70 percent during winter 2018-19,” the National Weather Service’s Climate Prediction Center wrote in an El Nino/Southern Oscillation (ENSO) Diagnostic Discussion earlier this month.

However, each El Niño and warm water period is different and creates effects to varying degrees. The extreme warm water period in 2015-16, “The Blob,” proved disastrous to Dungeness and rock crab fisheries because harmful algal blooms thrived. It also hampered the ocean survivability of coho salmon. In years past, pink shrimp populations plummeted but then bounced back after El Niño events.

“When El Niño is developing … short-term fluctuations in the near-surface winds [in the Pacific] can have substantial effects,” Emily Becker wrote on a Climate.gov blog in early August. “A period of weaker trade winds can help build El Niño’s warmer surface waters, while a period of stronger trade winds can cool the surface and impede El Niño’s growth. It appears that the trade winds are currently weakening, and may continue to do so through the next week, likely helping push things in the El Niño direction.”

Weather forecasters caution that making any predictions beyond a week to 10 days is uncertain. The Climate Prediction Center will make its next El Niño report and update in mid-September.

This story originally appeared on Seafood News, it is republished here with permission.