The Eastern Pacific hurricane season is two weeks old, and forecasters at the National Hurricane Center are already watching a patch of disturbed weather south of Mexico for signs of tropical organization. The basin’s 2026 season opened on May 15, and NOAA’s seasonal outlook, released later that month, projects 15 to 22 named storms and as many as 14 hurricanes between now and November 30. Across the date line that separates planning from action, the Atlantic season does not begin until June 1, and its forecast leans in the opposite direction: NOAA gives a 55% probability that Atlantic activity will fall below normal this year.
The split between the two oceans is not random. It traces back to conditions across the tropical Pacific, where sea-surface temperatures and large-scale wind patterns are aligning in ways that favor storm development west of Central America while suppressing it in the Caribbean and the open Atlantic. Understanding what is driving that contrast, and what could still change, matters for tens of millions of people living along coastlines on both sides of the continent.
Eastern Pacific: a season that could rank among the busiest in years
NOAA’s Climate Prediction Center outlook for the Eastern Pacific assigns a 70% chance of above-normal activity. The numbers behind that call are striking: 15 to 22 named storms, 9 to 14 hurricanes, 5 to 9 major hurricanes (Category 3 or higher), and accumulated cyclone energy running 120% to 190% of the long-term median. For comparison, the 30-year average (1991 to 2020) is roughly 15 named storms and 8 hurricanes, meaning the upper end of this forecast would represent a significant departure from the norm.
The NHC’s Graphical Tropical Weather Outlook archive shows that forecasters have already flagged at least one area of interest since the season opened on May 15. These early-season disturbances often form from easterly waves or broad low-pressure troughs drifting westward off the coast of southern Mexico and Central America. Whether the current area of disturbed weather organizes into a named storm or fizzles out, its appearance this early is consistent with the active outlook NOAA has issued.
Hawaii and other Central Pacific islands face a related threat. The NWS Central Pacific Hurricane Center in Honolulu projects 5 to 13 tropical cyclones in its area of responsibility, also citing a 70% probability of above-normal activity. Many of those systems will originate in the Eastern Pacific and track westward across the basin boundary at 140°W longitude. Even storms that stay offshore can generate dangerous swells, flooding rains, and hazardous marine conditions hundreds of miles from their centers.
Atlantic: quieter on paper, still dangerous in practice
NOAA’s 2026 Atlantic seasonal outlook calls for 8 to 14 named storms, 3 to 6 hurricanes, and 1 to 3 major hurricanes, with ACE values spanning 45% to 115% of the historical median. The agency puts the probability of a below-normal season at 55%, near-normal at 35%, and above-normal at just 10%.
Those numbers represent a sharp pullback from recent years. The 2024 and 2025 Atlantic seasons both ran above average, fueled in part by record-warm sea-surface temperatures across the Main Development Region east of the Caribbean. This year, forecasters expect large-scale atmospheric patterns, including stronger wind shear across the tropical Atlantic, to work against storm formation during the peak months of August through October.
But emergency managers along the Gulf Coast and Eastern Seaboard are quick to point out that seasonal statistics offer cold comfort when a single hurricane makes landfall. Hurricane Andrew struck during the below-normal 1992 Atlantic season and caused more than $27 billion in damage (in 1992 dollars). The 8-to-14 named-storm range still allows for storms reaching Category 4 or 5 intensity, and the wide ACE spread means the season could feel very different depending on whether those storms stay at sea or steer toward populated coastlines.
What is driving the ocean-to-ocean contrast
The divergence between the Eastern Pacific and Atlantic forecasts is rooted in the state of the El Niño-Southern Oscillation and its influence on vertical wind shear, the change in wind speed and direction with altitude that can either nurture or tear apart developing storms. When ENSO conditions favor reduced wind shear over the Eastern Pacific, as current observations and model guidance suggest for the summer of 2026, tropical waves have a much easier time organizing into hurricanes. The same ENSO configuration tends to increase shear over the Atlantic, acting as a brake on storm development there.
Sea-surface temperatures add another layer. Waters across the Eastern Pacific’s main storm-formation zone are running above average heading into June 2026, providing extra fuel for convection. In the Atlantic, while absolute temperatures remain warm by historical standards, the relative anomalies are less pronounced than they were during the hyperactive 2024 season, and atmospheric conditions are expected to be less hospitable overall.
These climate-scale drivers are not locked in stone. ENSO can evolve through the summer, and a shift toward neutral or El Niño conditions could alter the shear patterns that underpin both forecasts. NOAA typically issues an updated outlook in August, incorporating the latest ocean and atmosphere observations. Until then, the May projections represent the best available baseline.
What the forecasts cannot tell you
Seasonal outlooks are statistical tools, not crystal balls. The Eastern Pacific’s 70% above-normal probability still leaves a 30% chance the season finishes at or below average. The Atlantic’s below-normal lean does not rule out a surprise burst of activity if conditions shift mid-season. And neither forecast says anything about where individual storms will track or which communities will be affected.
That spatial uncertainty is the hardest part for coastal residents to absorb. An above-normal Eastern Pacific season could see most of its storms recurve harmlessly over open water west of Baja California, sparing populated areas entirely. A below-normal Atlantic season could still deliver a single, slow-moving hurricane to the Texas coast or the Florida Panhandle, producing catastrophic flooding and billions of dollars in damage. The aggregate numbers matter for insurance modeling and resource allocation, but they do not determine who gets hit.
The identity and trajectory of the Eastern Pacific’s first 2026 disturbance remain fluid as well. The NHC’s tropical weather outlooks assign formation probabilities over two-day and seven-day windows, and those numbers can swing dramatically from one advisory cycle to the next. A system flagged at 20% odds in the morning can dissipate by evening or, just as easily, organize faster than models anticipated. Early-season performance is a poor predictor of how the rest of the season will unfold.
Why preparedness does not wait for the forecast
For residents of hurricane-prone coastlines on either side of the continent, the practical message has not changed: the time to prepare is before the first storm forms, not after. That means reviewing evacuation routes, confirming that insurance policies cover wind and flood damage (standard homeowners’ policies typically exclude flooding), assembling supply kits, and identifying how to receive official NHC advisories and local emergency alerts.
The Eastern Pacific forecast is a signal to pay closer attention earlier. With the season already underway and NOAA projecting well-above-average activity, communities along the Pacific coast of Mexico and, to a lesser extent, Southern California should be monitoring NHC updates daily. The Atlantic’s quieter outlook is not an invitation to relax. It is a reminder that the margin between a forgettable season and a devastating one can come down to a single storm taking an unlucky track. History does not grade communities on how accurately they predicted the storm count. It grades them on whether they were ready when the storm arrived.
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*This article was researched with the help of AI, with human editors creating the final content.
