Storm Therese Batters Azores: Flights Grounded, Rare Snow Alert

The Portugal autonomous region of Azores faces a disruptive weather system today as Depression Therese sweeps through the archipelago, grounding multiple flights, toppling trees, and delivering winds up to 110 km/h alongside waves reaching eight meters—all while a polar air mass threatens to bring snow to higher elevations, an unusual phenomenon for the Atlantic islands.

Why This Matters:

• Flight disruptions: SATA Açores and Azores Airlines have cancelled inter-island and mainland routes, stranding hundreds of travelers.

• Material damage only: 26 incidents recorded across the archipelago—no injuries or displacements reported.

• Orange alert active: The Portugal Institute of the Sea and Atmosphere (IPMA) has elevated warnings for the Central and Eastern island groups through today.

• Tourism sector impact: Flight cancellations disrupt bookings as the sector continues recovery following recent route reductions.

Polar Air Mass Drives Unusual Cold Front

Depression Therese is no ordinary Atlantic low. The IPMA explains that the system draws in polar air from high latitudes, channeled by the interplay of an anticyclone positioned west of the archipelago and the depression's frontal boundary. This rare atmospheric setup is driving unusually cold conditions to the region, with snow possible at higher elevations—a spectacle almost unheard of in the Azores, where subtropical warmth typically dominates.

Wind gusts remain the primary threat. The Western Group (Flores and Corvo) is seeing sustained blasts up to 95 km/h, while the Central and Eastern islands face the brunt with gusts reaching 110 km/h. The IPMA issued orange warnings for wind and maritime agitation across São Miguel, Terceira, Pico, Graciosa, São Jorge, Faial, Santa Maria, and the Formigas islets. The Western Group sits under a yellow alert, denoting moderate risk.

Maritime conditions are equally hostile. Wave heights of eight meters are forecast across the entire archipelago, affecting sea operations. Fishermen and mariners have been advised to exercise caution, and harbor authorities are monitoring conditions.

Emergency Response and Infrastructure Damage

The Regional Civil Protection and Fire Service of the Azores (SRPCBA) registered 26 incidents across the archipelago, primarily concentrated on São Miguel (18 cases), Pico (4), Terceira (3), and São Jorge (1). Crews are responding to fallen trees blocking roads, collapsed fencing, and damaged roofing.

Authorities emphasize that all damage remains material—no fatalities, injuries, or evacuations have been reported. The SRPCBA has mobilized rapid-response teams equipped with chainsaws, cranes, and generators to clear arterial routes and restore power lines.

Flight Chaos and Tourism Sector Strain

Azores Airlines and SATA Air Açores cancelled multiple flights, according to available reports. The suspended routes include:

• Ponta Delgada–Flores

• Ponta Delgada–Pico

• Ponta Delgada–Madeira

• Ponta Delgada–Faro

• Lajes (Terceira)–Ponta Delgada

These cancellations strand hundreds of passengers, including business travelers, students, and tourists. Airlines have issued change waivers, but the backlog is expected to persist through the weekend as Depression Therese exits and normal operations resume.

The disruption comes as the Azores' tourism sector navigates operational challenges following recent route restructuring and reduced capacity on key airline services. Tourism-dependent businesses report cascading cancellations as travelers reroute.

Official Warnings and Next Steps

The IPMA's orange alert—signaling moderate to high meteorological risk—remains active through 6:00 PM today for the Central and Eastern groups. The Western Group retains a yellow warning, valid until midnight. The three-tier system (yellow, orange, red) is designed to calibrate public response; orange indicates conditions requiring precautions.

Regional authorities urge residents to avoid beaches, clifftops, and forested trails until the all-clear is issued.

Depression Therese is forecast to weaken as it tracks northeast into the open Atlantic by Friday afternoon. Clear skies and calmer seas are expected by the weekend, though cleanup efforts will extend into early next week.