Federal forecasters expect the Atlantic to produce fewer storms than usual this year, holding to an outlook for a below-normal hurricane season. In its updated seasonal forecast, the National Oceanic and Atmospheric Administration projected a range of 7 to 13 named storms, pointing to atmospheric conditions that tend to suppress tropical development.
The numbers behind NOAA’s outlook
A named storm is a tropical system that reaches sustained winds of at least 39 miles per hour, the threshold at which it receives a name. The forecast range of 7 to 13 named storms sits below the long-term average, and only some of those systems would be expected to strengthen into hurricanes, which require sustained winds of at least 74 miles per hour.
The agency maintained its below-normal prediction in the update, signaling confidence that the season’s drivers point away from a busy year, according to the agency’s seasonal update. A range rather than a single figure reflects the genuine uncertainty in forecasting a season months in advance.
How El Nino suppresses Atlantic storms
The central reason for the quieter outlook is El Nino, a periodic warming of the tropical Pacific Ocean that reshapes weather patterns worldwide. Its influence reaches the Atlantic by strengthening upper-level winds over the basin, and that increase in wind is what tends to hold storms back.
The mechanism is wind shear, the change in wind speed and direction with height. Strong shear tears at the vertical structure a tropical storm needs to organize and intensify, disrupting a system before it can consolidate. When El Nino ramps up shear across the Atlantic, fewer storms form and those that do often struggle to strengthen. The effect works alongside other seasonal factors such as ocean temperatures and dry, dusty air blowing off the Sahara, any of which can further limit development. The influence is not absolute, however, since unusually warm ocean water can partly offset the suppressing effect of shear by giving storms more energy to draw on. That tug-of-war between competing factors is one reason forecasters express the outlook as a range rather than a firm count, and it can make a season behave unexpectedly even when the dominant signal points toward calm.
Why a below-normal forecast is not an all-clear
A quieter season lowers the overall count but does not remove the threat to any particular place. A single hurricane making landfall can cause catastrophic damage regardless of how many storms form basin-wide, and some of the most destructive hurricanes on record occurred in seasons that were otherwise unremarkable.
For that reason, forecasters stress that seasonal outlooks describe basin-wide activity, not the odds for a specific coastline. Communities along the coast prepare the same way in a quiet season as in a busy one, because it takes only one storm arriving in the wrong place to make a season consequential for them. The number of storms says little about where any of them will go, and history offers examples of quiet years remembered for a single devastating landfall. Emergency managers therefore treat the seasonal total as background information rather than a planning tool, since a household in the path of a hurricane experiences the full storm regardless of how the year ranks. The count matters more to insurers and long-range planners weighing aggregate risk than to a coastal resident deciding whether to keep supplies and an evacuation plan ready.
What a seasonal outlook can and cannot do
Seasonal forecasts estimate how active a whole basin is likely to be over several months, drawing on ocean temperatures, wind patterns and climate signals such as El Nino. They are useful for emergency managers, insurers and coastal planners gauging the broad risk ahead of the season’s peak.
What these outlooks cannot do is predict where or when an individual storm will strike. Those specifics only become clear in the days before a storm approaches, once it has formed and forecasters can track its path. The seasonal number sets expectations for the whole; day-to-day forecasts handle the particulars, and the two operate on entirely different timescales.
How forecasters build a seasonal number
The range of 7 to 13 named storms is not a guess but the product of models and statistical comparisons with past years that shared similar conditions. Analysts examine the current state of ocean temperatures and wind patterns, then look to seasons with comparable setups to estimate how active the coming months are likely to be, expressing the result as a range to convey the uncertainty involved.
Forecasters revisit that estimate as the season unfolds, which is why an August update can reaffirm or adjust a spring projection. Holding to a below-normal call in the update indicates that the conditions expected to suppress activity, chiefly the El Nino-driven wind shear, remained in place as the basin approached its most active stretch.
The peak still lies ahead
The Atlantic hurricane season runs through late fall, and its most active stretch typically falls in the weeks around the transition from summer to autumn. That means even a below-normal season retains meaningful potential during its peak, and the updated forecast covers the part of the calendar when storms are most likely.
The practical message from a below-normal outlook is one of tempered expectations paired with steady preparation. Fewer storms are anticipated, but the season is far from over, and readiness along the coast remains the sensible response no matter what the seasonal totals ultimately show. Forecasters note that the difference between a quiet season and a busy one often comes down to conditions during a few crucial weeks, when the atmosphere either allows storms to spin up or holds them in check. Until that peak has passed, a below-normal outlook is best read as a lowered probability rather than a promise, and the coast will not know the season’s true character until it is over.
This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.
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