NOAA Raises the Odds of a Below-Normal Hurricane Season as El Nino Strengthens

NOAA has raised the probability of a below-normal 2026 Atlantic hurricane season from 55 percent to 75 percent in its updated August outlook, pointing to an El Nino that continues to strengthen and is expected to suppress storm formation through the remainder of the season. The agency held its storm count ranges unchanged at 7 to 13 named storms, 2 to 6 hurricanes and 0 to 2 major hurricanes of Category 3 strength or higher.

The update, issued August 6, arrives at the point in the calendar when the Atlantic season historically accelerates toward its September peak. For Florida, which faces more hurricane landfall risk than any other state, the outlook shapes expectations without changing the preparation calendar that runs through November 30.

Season activity to date has been well below the climatological pace. The basin has produced three named storms, Arthur, Bertha and Cristobal, and no hurricanes.

What El Nino does to Atlantic hurricanes

El Nino describes a pattern of unusually warm sea surface temperatures in the central and eastern equatorial Pacific, along with the atmospheric circulation changes that accompany it. Its influence on the Atlantic hurricane season operates through the upper atmosphere rather than through Atlantic water temperatures.

Warmer Pacific waters shift the location of tropical thunderstorm activity, which alters upper-level wind patterns downstream across the tropical Atlantic. The practical result is increased vertical wind shear, meaning wind speed and direction change substantially between the lower and upper atmosphere over the areas where Atlantic storms form.

Shear disrupts developing tropical cyclones by tilting and displacing the vertical column of thunderstorms a storm needs to organize. A system that might strengthen steadily in a low-shear environment struggles to maintain structure when upper-level winds tear at its top.

Forecasters have described the current El Nino as likely to reach unusually strong intensity by year's end. The stronger the event, the more reliably it suppresses Atlantic activity, which is the basis for NOAA raising its below-normal probability rather than changing its storm count ranges.

The competing signal

El Nino is not the only large-scale factor at work. Atlantic sea surface temperatures have run slightly warmer than normal, and trade winds have been weaker than average, both of which support tropical development.

Warm water is the fuel supply for tropical cyclones, which draw energy from evaporation at the ocean surface. Weaker trade winds reduce ocean mixing that would otherwise bring cooler subsurface water upward, helping the warm surface layer persist.

The forecast reflects a judgment that El Nino's shear signal outweighs the supportive ocean signal this season. That balance is why the outlook allows for as many as 13 named storms despite the elevated below-normal probability. A season can produce a reasonable number of named storms while yielding few that intensify into hurricanes, because shear can permit initial formation while preventing further strengthening.

What a seasonal outlook does not tell Floridians

Seasonal outlooks forecast basin-wide activity. They do not forecast where storms will go, how many will make landfall or which coastlines face elevated risk. NOAA has consistently stated that its outlook is not a landfall forecast, and the distinction is central to how Florida residents should read it.

The historical record makes the point directly. Hurricane Andrew devastated South Florida in August 1992 during a season that produced just seven named storms. Hurricane Charley struck Southwest Florida in 2004 during an active season, and Hurricane Michael reached the Panhandle as a Category 5 in 2018. Storm counts across those seasons varied widely; the outcome for the communities struck did not.

Emergency managers describe the relevant metric as the storm that reaches your county, not the number that form in the basin. A below-normal season with one Florida landfall is worse for the affected community than an above-normal season in which every storm recurves into the open Atlantic.

What it means for Floridians

The preparation checklist does not change with the outlook. Florida households are advised to maintain supplies covering at least seven days, including one gallon of water per person per day, non-perishable food, medications, a battery-powered radio, flashlights and batteries, and cash in small denominations for the period after a storm when card systems may be offline.

Document preparation is the item most often deferred. Insurance policies, property deeds, identification and medical records should be photographed or scanned and stored where they can be retrieved from a phone. Homeowners should also verify what their policy covers, particularly the separation between windstorm coverage and flood coverage.

Flood insurance carries a standard 30-day waiting period before a new National Flood Insurance Program policy takes effect, which means a policy purchased when a storm appears in the forecast will not cover that storm. Mid-August is already late in the season for that decision, but not too late to matter for September and October.

Knowing an evacuation zone is the other item worth handling in advance. Florida evacuation zones are assigned by storm surge vulnerability and lettered from A through F in most coastal counties. Orders are issued by zone, and residents who do not know theirs lose time at exactly the wrong moment.

Local impact across the state

Every Florida coastal county maintains its own emergency management office with evacuation zone lookup tools, shelter listings and special needs registration. Special needs shelters, which serve residents requiring medical support during an evacuation, generally require advance registration that cannot be completed once a storm is approaching.

The Panhandle, Big Bend, Southwest Gulf Coast, Tampa Bay and the Southeast Florida metros each face distinct hazard profiles. Storm surge risk is highest along the shallow Gulf shelf, particularly in the Big Bend and Tampa Bay, where the bathymetry amplifies surge heights. Wind risk concentrates in South Florida and the Keys, where the strongest Atlantic systems have historically made landfall.

Inland counties are not exempt. Freshwater flooding from heavy rainfall has caused significant damage well away from the coast, and wind damage extends far inland from a major hurricane's landfall point.

How seasonal outlooks are built

NOAA's seasonal hurricane outlook combines statistical models trained on historical relationships between large-scale climate signals and Atlantic activity, dynamical models that simulate atmospheric and oceanic behavior forward in time, and expert assessment from forecasters at the Climate Prediction Center.

The primary predictors include the state of the El Nino Southern Oscillation, Atlantic sea surface temperature patterns, the strength and position of the West African monsoon, and the phase of longer-period Atlantic variability.

The output is expressed as ranges with associated probabilities rather than point estimates, because the underlying uncertainty is genuine. A forecast of 7 to 13 named storms reflects the model spread rather than a hedge.

The August update exists because the May outlook is issued before the season's peak and before several predictors have resolved. By early August, forecasters have observed how the season has begun and have better information about the trajectory of El Nino, which is why the update raised the below-normal probability while leaving the ranges intact.

What Florida learned from past seasons

Florida's building code, insurance market and emergency management structure all reflect lessons from specific storms rather than from seasonal statistics.

Hurricane Andrew in 1992 exposed construction deficiencies that led to a substantial strengthening of Florida's building code, which now ranks among the most stringent in the country for wind resistance. Homes built to modern Florida code perform measurably better in high wind than older structures.

The 2004 and 2005 seasons, which brought multiple landfalls in consecutive years, reshaped the state's insurance market and led to the expansion of the state-backed insurer and the Florida Hurricane Catastrophe Fund.

Hurricane Michael in 2018 demonstrated the risk of rapid intensification, strengthening to Category 5 shortly before landfall in the Panhandle and leaving limited time for evacuation. Rapid intensification near the coast has become a recognized forecasting challenge and a specific emergency management concern.

Each of those events occurred in a season whose statistical characteristics were largely irrelevant to the communities affected, which is the recurring lesson emergency managers emphasize.

What insurance and building code changes mean now

Florida's exposure to any given storm has changed over time, and not only because more people live in vulnerable areas.

Building code strengthening after Hurricane Andrew produced measurably better structural performance in newer homes. Post-2002 construction in Florida generally incorporates enhanced roof attachment, impact-resistant openings or shutters, and connection details designed to keep a building's load path intact under high wind.

The practical effect is that a Florida neighborhood can experience the same wind field and show substantially different damage between older and newer structures. That divergence has become a factor in insurance pricing, with carriers differentiating by construction year and mitigation features.

Wind mitigation inspections allow homeowners to document features including roof shape, roof deck attachment, secondary water resistance and opening protection. Those inspections can produce meaningful premium credits, and they are among the few actions a homeowner can take that directly reduces cost.

Roof age is the single feature carriers weigh most heavily in Florida, and homeowners with older roofs have faced nonrenewal and coverage restrictions independent of any claims history.

What's next

The National Hurricane Center issues Tropical Weather Outlooks four times daily through the season and begins advisories once a system reaches depression status. The Climate Prediction Center updates El Nino status monthly, which will indicate whether the pattern continues strengthening as forecast.

Florida's peak risk period runs from mid-August through October, with the statistical peak of Atlantic activity falling around September 10. The season officially closes November 30, and late-season storms forming in the western Caribbean have historically threatened South Florida in October and November.

NOAA will assess the season's verification after it closes, comparing observed activity against the outlook ranges issued in May and updated in August.