|Tropical storm (SSHWS/NWS)|
|Formed||September 14, 2016|
|Dissipated||September 25, 2016|
|(Extratropical after September 25)|
1-minute sustained: 70 mph (110 km/h) |
|Lowest pressure||988 mbar (hPa); 29.18 inHg|
|Areas affected||Bermuda and Cape Verde Islands|
Tropical Storm Karl was a strong tropical storm that brought minimal damage to the Cape Verde Islands, as well as Bermuda. Karl started off as a low over western Africa. The low then entered the Atlantic, and was then monitored by the NHC. The low was given a medium chance of development. Then the low curved northeast, passing over the Cape Verde Islands. The low gained organization and became a tropical depression on September 14. The depression steadily organized and gained convection, and became Tropical Storm Karl the next day. Karl would then steadily intensify, making its first peak at 60 mph. Forecasting models, like the NHC, predicted Karl to peak as a Category 2 hurricane, with some models predicting major hurricane intensity. However, Karl weakened steadily, and eventually, Karl became a tropical depression, and remained at this intensity for a day, then re-strengthened to a tropical storm. After this, Karl began to re-intensify. Karl made a close approach to Bermuda, only causing minimal damage. One advisory before transitioning into an extra-tropical cyclone, Karl reached its peak intensity of 70 mph. At 12:00 UTC on September 25, Karl transitioned into an extratropical cyclone.
On September 11, a low formed over Western Africa, trekking westwards at a moderate pace. For a time, the NHC did not monitor it until it neared the Atlantic Ocean. Once the low entered the basin, the NHC gave this low a moderate chance of development. Over time, the low slowly organized as it curved northeast-wards, and passed over the Cape Verde Islands, only caused very minimal damage. Then, the low became a tropical depression, on September 14, it was also the twelfth tropical depression of the season. The depression was forecast to become a strong tropical storm, with some models taking it to hurricane intensity. The tropical depression slowly organized, and became Tropical Storm Karl the next day. Karl, by most models, was predicted to become a hurricane, with a few taking it to major hurricane intensity. Due to some-what strong shear, Karl did not intensify rapidly, instead, it slowly intensified, until making its first peak of 60 mph. Afterwards, Karl began to weaken, all the way until reaching tropical depression status. Karl would remain at this intensity for a day. Then, Karl re-intensified, and made a very close approach to Bermuda. Karl's center was only several miles away from a landfall, which Nicole in 2016 later did. Karl surpassed its previous intensity peak, and eventually, peak as a 70 mph tropical storm, just below hurricane status. Just six hours after peak, Karl transitioned into an extratropical cyclone.