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Hurricane Isaias is now forecast to intensify further to become a major Category 3 storm as it approaches the Gulf Coast today, outpacing meteorologists initial expectations. But, prior to landfall late today or early on Saturday, Isaias is expected to encounter wind shear and begin to weaken, which should lessen the impacts and keeps estimates in the single-digit billions. Update – 17:15 UTC: Gallagher Re has updated its analysis to say that, “Based on an assessment of exposure extending from Mobile (Alabama) to Destin (Florida), anticipated coastal and inland wind speeds, and historical landfalls from high-end Category 2 or low-end Category 3 hurricanes in this region, it is anticipated that insured losses, including private insurance carrier and National Flood Insurance Program (NFIP) claims payouts, would be expected to settle in the mid-single-digit billions (USD). Given abundant reinsurance market capital, this event is unlikely to meaningfully influence upcoming January 1 reinsurance renewal discussions.” It’s worth noting there that the “low” to mid-single digit is now just mid-single digits, suggesting a slightly higher loss forecast from the reinsurance broker. Update – 16:00 UTC: Andrew Siffert of BMS Group has written in his latest update, “As stated yesterday, the landfall location, intensity, and overall structure of Isaias remain uncertain even with landfall about 12 hours away. Still, based on what we know, historical analogs like Hurricane Sally (2020), and catastrophe model runs, the losses today should be higher. This is simply because the expected landfall location is farther east, with a stronger storm near Pensacola, FL. Losses should be below $10B, with an expected range of $4B to $6B today. However, as shown in the loss difference between Sally (2020) and Ivan (2004), there can be exponentially higher losses with a stronger storm, which is why how strong Isaias gets today and how fast it moves forward, will determine how much time it has to weaken before landfall due to drier air and wind shear. In leading catastrophe risk model event sets, 80% of Category 1 events impacting the Pensacola, FL region result in industry losses below $3B, but when adjusted to Category 2 events, losses jump to $17B. So, losses are quite sensitive to overall landfall intensity, and while insurance industry losses for Isaias increased, this still does not seem to materially affect current capacity or the softer market conditions in the U.S. property insurance market.” In addition, reinsurance broker Marsh Re has said, “Based on historical events, Isaias has the potential to generate insured losses in the mid single digits of billions of USD. Opal, Dennis and Eloise are the best matches.” Update – 15:00 UTC: No change to hurricane Isaias’ intensity and pressure in the 15:00 UTC update from the NHC, being still 120 mph sustained winds and 959mb. But, the NHC now states that Isaias could be stronger on landfall than was assumed earlier today. They explain, “Fluctuations in intensity are possible through this afternoon, but Isaias is expected to be at or near major hurricane strength when it makes landfall this evening. Weakening is expected beginning tonight after Isaias makes landfall, and the storm is likely to become post-tropical by late Saturday.” That clearly has ramifications for the potential insurance market loss and the stronger the storm at landfall, the more chance there is of reinsurance and potentially ILS structures supporting the recovery from the storm financially. So, hurricane Isaias could potentially be a strong Cat 2 or even weak Cat 3 landfall event and as Twelve Securis highlighted (see below) that could take industry losses towards higher single digit billions or above, depending on the exact landfall location and damage that occurs. Notably, for those in the path of Isaias, a stronger storm will be more of a threat to lives and property, both from winds and potentially also surge too. The NHC warns of life-threatening storm surge and damaging winds across the landfall region. Update – 14:45 UTC: Cat bond and ILS investment manager Twelve Securis has commented on hurricane Isaias, “Historical events with comparable tracks and intensity profiles include Hurricanes Sally (2020), Erin (1995) and Opal (1995). Category 1 hurricanes making landfall in this region have historically generated industry losses ranging from hundreds of millions to low-single digit billions of US dollars, while Category 2 events have resulted in losses in the low- to mid-single digit billions. “Based on current forecasts, an outcome comparable to Hurricane Sally, with insured losses in the mid-single digit billions of US dollars, is considered the most likely scenario. However, considerable uncertainty remains regarding the precise landfall location and intensity. Should Isaias strengthen more than anticipated, a scenario closer to Hurricane Opal, with insured losses exceeding USD 10bn, cannot be ruled out, although this is currently considered less likely.” Update – 13:00 UTC: The NHC has just declared hurricane Isaias a major Category 3 storm, with sustained winds of 120 mph and higher gusts. The storms minimum central pressure has been measured at 959mb by a dropsonde. Update – 12:00 UTC: Hurricane Isaias continues to have maximum sustained winds of 110 mph, but its central pressure has deepened a little to 958mb, according to the NHC. The Center continues to forecast Isaias will become a major hurricane soon and be a dangerous although weakening storm at landfall. The NHC has now raised its storm surge forecast values slightly, with between 6 and 9 feet now expected from the Alabama/Florida border to Grayton Beach, FL, and surge heights of 4 to 7 feet more widely between Dauphin Island, AL and Steinhatchee River, FL. Update – 09:00 UTC: A new update from the NHC shows hurricane Isaias is a little stronger with sustained winds of 110 mph (top-end Category 2) and a central pressure currently estimated at 963mb. The storm is intensifying and the NHC reiterated, “Isaias is likely to become a major hurricane this morning. Slight weakening is expected before landfall, but it is expected to remain a dangerous hurricane.” New forecast advisory date from the NHC now shows hurricane Isaias reaching sustained winds of around 120 mph (major Category 3 strength) with gusts as high as 150 mph as it moves north through the Gulf, but still weakening as it nears landfall. Moody’s has said this morning that its data shows 31,659 commercial properties in Alabama, Florida and Mississippi have a greater than 50% probability of facing winds of at least 50 mph from hurricane Isaias, which is the threshold at which some damage is likely. These properties have a total estimated value of $71.8 billion. There are 14,945 multi-family residential buildings with an estimated value of $40.2 billion within that data, while retail, office and industrial are the other commercial property types most exposed. Moody’s also said that the top cities expected to be impacted by Hurricane Isaias include: Mobile, AL; Pensacola, FL; and Biloxi, MS. James Cosgrove, Associate Director-Moody’s RMS Event Response, Moody’s commented, “Isaias is the first hurricane of the 2026 North Atlantic hurricane season and represents the latest point in the calendar year that the first hurricane has formed. The last hurricane to make landfall in the coastal region that spans Mississippi, Alabama, and the western Florida Panhandle was Hurricane Sally in September 2020, which made landfall as a Category 2 hurricane near Gulf Shores, Alabama, just west of Pensacola, Florida. Sally’s landfall parameters and landfall location are not too dissimilar to the current forecast for Isaias. “Note that Sally itself was the first hurricane to make landfall in Alabama since Ivan in 2004 (though Alabama has a narrow coastline for such occurrences to be recorded). Also prior to Sally, Hurricane Nate made landfall as a weak Category 1 hurricane near the mouth of the Mississippi River in Biloxi, Mississippi in October 2017. Nate was weaker and further west than the forecast for Isaias.” Hurricane Isaias has outpaced meteorologist expectations for a number of reasons. At first, when the depression was forming, many had said they did not anticipate the storm to form as quickly as it did. Now, having spent days forecasting a low-end Category 2 hurricane at Isaia’s peak, the forecasts have changed as Isaias has intensified a little more than anticipated. Currently, as of the 06:00 UTC update from the National Hurricane Center, Isaias has maximum sustained winds of 105 mph, which puts it as a Category 2 storm at this time. Hurricane Isaias has stronger gusts and a minimum central pressure that is estimated at 972mb, while the storm is currently around 230 miles south of the mouth of the Mississippi River. Isaias is now forecast to move north-northeast and then turn to the north, before making landfall on the northern Gulf Coast late tonight, or early Saturday morning. The NHC said, “Isaias could briefly become a major hurricane later today. Although some weakening is forecast thereafter, Isaias will remain a dangerous hurricane as it approaches the northern Gulf Coast tonight.” The chart below from Tomer Burg’s PolarWx service shows the current NHC forecast including cone and wind speeds (this should update to show the latest hurricane information): The latest forecast advisory data is still from 03:00 UTC, but that predicts hurricane Isaias will reach sustained winds of 100 knots, which would put it as a Category 3 major hurricane as it approaches landfall. But, the forecast weakening is evident in the data as well, with sustained winds of just under 100 mph and gusts of around 120 mph expected just prior to landfall, hence this would be a low-end Category 2 landfall event if that turns out to be accurate. Of course, hurricane Isaias has tended to outperform, so there is still some uncertainty. But wind shear is in its path and it is difficult to see it maintaining structure and so strength as it nears landfall, weakening does look backed in at this time. The forecast storm surge remains for around 6 to 7 foot maximums, with the coastline between Dauphin Island, Alabama to Indian Pass, Florida expected to see the peak. Localised rainfall totals of up to 15 inches, more widely 4 to 8 inches are also warned, while the threat of tornadoes as hurricane Isaias moves ashore and inland is also considered a risk. The landfall location remains centered around Pensacola, Florida, in the far western Panhandle, according to the NHC forecast cone. Given the landfall outlook remains for a Category 2 hurricane towards the lower-end, the outlook for the insurance market loss potential remains unchanged at this time as well. Demonstrating the extent of the insured exposure in the path of hurricane Isaias, Cotality said that roughly 777,000 homes with a combined reconstruction cost value (RCV) of $241.6 billion are at risk of hurricane wind damage across eight counties under a Hurricane Warning, with 217,000 homes representing $65.2 billion in RCV facing potential storm surge threat. Of course, that is just the level of exposure in potential harms way and in no way indicates the size of industry losses that are possible with hurricane Isaias. In fact, reinsurance broker Gallagher Re said in its latest update that, “We maintain our expectation that insured losses, including private insurance carrier and National Flood Insurance Program (NFIP) claims payouts, will likely settle in the low- to mid-single-digit billions (USD). Given abundant reinsurance market capital, this event is unlikely to meaningfully influence upcoming January 1 reinsurance renewal discussions.” Which continues to align with other market sources across reinsurance, catastrophe bonds and insurance-linked securities we’ve spoken with. Late yesterday, Andrew Siffert of brokerage BMS Group concurred with a single-digit billion loss potential for hurricane Isaias, writing, “The landfall location, intensity, and overall structure of Isaias remain uncertain, but based on what we know, historical analogs like Hurricane Sally (2020), and catastrophe model runs, this would likely be a low single-digit billion-dollar loss for the insurance industry, with a range of $3B to $ 5B, with 80% of Category 1 events impacting the Mobile region resulting in losses below $3B of industry loss. Isaias will no doubt add to existing losses along the Gulf Coast in what is, overall, a historically low year for hurricane activity across the Atlantic Basin. For now, it does not seem this will materially affect current capacity or the softer market conditions in the U.S. property insurance market.” Whether hurricane Isaias reaches Category 3 strength or not as it moves over the very warm Gulf waters, what really matters for the eventual insurance industry loss and any impact to reinsurance, cat bonds and ILS, is whether it follows the weakening trend that is anticipated as it nears the Gulf Coast. A weakened low-end Cat 2 or even Cat 1 storm at landfall will mean a lower loss quantum, certainly only single digit billions. But, if Isaias should outperform again and makes landfall with higher wind speeds, then the costs could rise. All of the main forecast models seem in agreement though, for this weakening to occur on approach. There isn’t a great deal more to add, aside from it remains the case that some parametric insurance arrangements will be exposed to Isaias, especially at higher wind-speeds, while there is a chance of some losses flowing to reinsurance capital through lower-layer arrangements, quota shares including sidecars, while any aggregate structures exposed to Isaias could see deductible erosion. At this stage, unless Isaias does outperform, which given the shear expected ahead does seem unlikely, the majority of the catastrophe bond market does not look to be overly concerned by this storm. At the low to mid-single digit billions of industry losses cat bonds outstanding will largely, perhaps all depending on the outcome, be safe from direct losses. Again though, aggregate cat bonds could see deductible erosion from a smaller storm loss, like Isaias is expected to be, so there can be some pricing effects as a result. We’ll update you as the situation develops and you can keep track of developments using our 2026 Atlantic hurricane season page. View all of our Artemis Live video interviews and subscribe to our podcast. All of our Artemis Live insurance-linked securities (ILS), catastrophe bonds and reinsurance video content and video interviews can be accessed online. Our Artemis Live podcast can be subscribed to using the typical podcast services providers, including Apple, Google, Spotify and more.
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