Tropical Depression Six formed southwest of the Azores on September 19, 2026, with initial maximum sustained winds of 55 km/h (35 mph). The NHC forecast the depression to reach tropical-storm intensity by 00:00 UTC on September 20 and strengthen further to 75 km/h (45 mph) by 00:00 UTC on September 21. The system would receive the name Fay if upgraded to a tropical storm.
A 19-year-old hiker died and multiple people were injured when lightning struck a small structure near the summit of Mount Timpanogos, Utah, on September 18, 2026.
A tornado touched down east of Fruit Heights, Utah, at approximately 13:52 LT (19:52 UTC) on September 18, 2026, as severe thunderstorms moved across Davis County and surrounding areas. Rain and damage was reported in the affected areas. The National Weather Service (NWS) had issued a tornado warning for portions of Davis, Weber and Morgan counties just eight minutes before the reported touchdown.
Heavy rainfall and repeated thunderstorms are raising the flash-flood threat across Arizona on September 16, 2026, with the Weather Prediction Center (WPC) placing parts of southern and central Arizona under a Moderate Risk of excessive rainfall. Flood Watches cover much of the state, while National Weather Service (NWS) offices warn that burn scars, slot canyons, and already saturated ground require particular attention during periods of heavy rainfall.
The Weather Prediction Center (WPC) placed parts of northeastern Kansas and northwestern Missouri under a Moderate Risk of excessive rainfall from 07:00 CDT (12:00 UTC) on September 15 through 07:00 CDT (12:00 UTC) on September 16, 2026, as repeated thunderstorms threaten flash flooding. The Moderate Risk extends into far southeastern Nebraska, while parts of the northern Kansas City/Pleasant Hill forecast area have already received more than 127 mm (5 inches) of rain and could receive another 25–76 mm (1–3 inches).
Two tornadoes were confirmed in Paraná between September 9 and 10, 2026, as severe weather affected southern Brazil, while three people were killed when a landslide struck a home during heavy rain in Ponta Grossa. The National Institute of Meteorology (INMET) warned of another period of intense instability on September 11, with an extratropical cyclone forecast to form Friday night between northeastern Rio Grande do Sul and the Atlantic Ocean.
Severe storms and torrential rainfall struck parts of Italy, Slovenia and Croatia on September 9 and 10, 2026, causing flooding, evacuations, transport disruption and localized infrastructure damage. Two women died in Italy during the event, one after becoming trapped in a flooded underpass at Latisana and another after being struck by broken window glass at Sinalunga.
The death toll from the September 6 avalanche on Mount Mizhirgi in Russia’s Kabardino-Balkaria has risen to 14, while three climbers remain missing. Russia’s Ministry of Emergency Situations (MChS) suspended search-and-rescue operations at 15:50 MSK (12:50 UTC) on September 9 after another snow-and-ice mass descended in the Bezengi Gorge. The agency said 63 personnel were at the site and that a Mi-8 helicopter was expected to be deployed after daylight on September 10.
One person died on Oʻahu as Hurricane Lowell passed the Hawaiian Islands late on September 7, 2026 (local time), while the storm’s core passed near Niʻihau with maximum sustained winds of 175 km/h (110 mph). Approximately 90% of Kauaʻi Island Utility Cooperative customers were without power the following morning, while numerous roads and Port Allen Small-Boat Harbor sustained severe damage. Preliminary National Weather Service (NWS) observations included a gust of approximately 150 km/h (92 mph) at Puʻu Lua and a 72-hour rainfall total of 536.2 mm (21.11 inches) at Kilohana.
Nagoya recorded 104.5 mm (4.1 inches) of rain in one hour on September 8, 2026, setting an all-time station record as flooding disrupted roads and rail services. Nagoya City issued Level 5 Emergency Safety Measures for communities along the Kanare, Yada and Ueda rivers, while the Japan Meteorological Agency and the Ministry of Land, Infrastructure, Transport and Tourism issued a Level 5 flood special warning for the Shonai River system at 18:20 LT (09:20 UTC). The municipal Level 5 measures were downgraded at 22:25 LT (13:25 UTC), while local media reported four injuries across Aichi Prefecture.
