• ClimateHow the world's climate has shifted since 1940: zones, lines and thresholds, computed from ERA5. 5
• Windstorm Lothar 1999On 26 December 1999 windstorm Lothar swept across France, Switzerland and southern Germany: how it formed and what it did. 6
• El NiñoA warm patch in the Pacific changes the weather of the whole world: the mechanics, history and cost of El Niño. 8
• Winter Storm Uri 2021In February 2021 Texas freezes: from the polar vortex breaking up to the blackout, step by step. 7
• Storm of the Century 1993In March 1993 a low over the Gulf of Mexico becomes the storm of the century, with snow from Alabama to Canada. 2
• Polar vortexThe vortex over the pole decides whether winters turn cold: its history since 1948 and the current forecast. 4
• Storms of the worldWhere the great storms of the world form and where they go. 2
• Holiday weatherWhat the weather was like on the days that matter: white Christmas, New Year's Eve, Easter, for every place since 1940. 1
• SeasonWhat the seasonal models expect for the coming winter. 1