Storm Charles: Explosive Cyclogenesis Brings 140 km/h Wind Gusts 2026

AEMET has confirmed that Storm Charles will undergo explosive cyclogenesis, with wind gusts reaching up to 140 km/h in the Iberian Peninsula. The real threat isn't the rain—it's the violent wind gusts that could break records and endanger communities.

On January 28, 2026, a weather station in a wind farm southwest of Coimbra recorded a gust of 208.8 km/h—the highest ever measured in the interior of the Iberian Peninsula. Now, some models suggest that record could be challenged as Charles intensifies.

What Is Explosive Cyclogenesis and Why It Matters

Explosive cyclogenesis, also known as a weather bomb, occurs when a low-pressure system deepens rapidly—typically by at least 24 hPa in 24 hours. For the latitudes where Charles is moving (between 35° and 38°N), the threshold is lower, around 15.9 to 17.1 hPa.

AEMET reports that Charles's central pressure will drop 19 hPa in 24 hours, clearly exceeding the threshold. While not extreme, it qualifies as explosive cyclogenesis, and that's enough to generate hurricane-force wind gusts.

Wind Gusts: The Real Danger

When meteorologists talk about wind gusts, they mean short bursts of high speed, not sustained winds. These gusts can be incredibly destructive, downing trees, damaging infrastructure, and posing a serious risk to life.

The phenomenon driving these gusts is known as a sting jet—a narrow corridor of intense winds that can form within explosive cyclones. The sting jet from Storm Kristin on January 28 caused the record gust in Portugal, and conditions are ripe for a repeat with Charles.

Portugal and Spain Take Precautionary Measures

Portugal has already ordered schools to close on Wednesday, and many schools on the Spanish side of the border have followed suit. The decision reflects the severity of the expected winds, which are unusual for inland areas—typically only seen at capes and mountain peaks.

Authorities are urging residents to secure loose objects, avoid travel unless necessary, and stay indoors during the peak of the storm. The background to this story is set out in Explosive Cyclogenesis Heads for Gulf of Cadiz, AEMET Prepares. A related thread runs through Explosive Cyclogenesis Alert: AEMET Warns Sierra de Gredos. Earlier coverage in Spain Heatwave Alert: AEMET Warns of 44°C Iberian Oven shows how the argument developed.

Key Takeaways for Residents

• Explosive cyclogenesis confirmed: pressure drop of 19 hPa in 24 hours.
• Wind gusts up to 140 km/h expected, especially in exposed areas.
• Sting jet phenomenon could produce locally even stronger gusts.
• Schools closed in Portugal and parts of Spain as a precaution.
• Avoid outdoor activities and secure property during the storm.

Comparing Storm Charles to Previous Events

What to Watch Next

Forecasters are closely monitoring the evolution of Charles, particularly the potential for a sting jet to develop. If a sting jet forms, localized gusts could exceed 140 km/h, potentially challenging the record set by Kristin. A closer look at the same subject appears in Spain Heatwave Alert: AEMET Warns of Intense Heat Return. Anyone following the wider picture can start with Spain's AEMET Record Temperature Map Shows a Hotter Future. The same theme surfaces in Spain September Heat: AEMET Forecast U-Turn and 43C Heat, which takes a different angle.

Residents should stay informed through official channels and be prepared for possible power outages and travel disruptions. Context on how this played out before sits in Spain's AEMET Forecast: No Autumn in Sight as Heat Persists. A companion piece, AEMET Forecast for August 12 Solar Eclipse Across Spain, approaches the same subject from another angle.