Europe Braces for Dramatic Temperature Swing from Arctic Cold to Extreme Heat

After weeks of unseasonably cool weather, Europe is bracing for a sharp temperature swing as warm air surges northward into western and central regions.

A persistent blocking high over the North Atlantic and a slow-moving low across southern Scandinavia pulled Arctic air south last week, dropping temperatures 10-15°C below seasonal averages for over a week.

Overnight frosts affected farmers and gardeners, with grape growers in France lighting fires to protect vineyards. Such prolonged cold has become increasingly rare as Europe warms faster than any other continent due to climate change.

The cool, unstable air combined with strong May sunshine triggered widespread thunderstorms, with approximately 750,000 lightning strikes recorded across Europe and surrounding areas from May 11-16.

Serbia’s meteorological service issued red warnings for strong winds, heavy rain, and hail. By the weekend, low pressure shifted northwest, cutting off the northerly flow and allowing westerly winds to return.

Later this week, a high-pressure system is expected to build across western Europe, drawing hot air from North Africa. By Friday, temperatures in France and England could climb 15°C higher than a week earlier, reaching mid-to-high 30s Celsius in Spain and Portugal.

Overnight lows in those regions may exceed daytime highs recorded the previous week.

Similar dramatic temperature contrasts are unfolding across the United States. In the Pacific Northwest, where temperatures hit around 30°C last week, cold air sweeping south from Canada is interacting with low pressure to produce the region’s second winter storm this month.

Significant snowfall is forecast across higher terrain in Wyoming, northern Colorado, and northeastern Utah early this week, with up to 46 cm (18 inches) possible at highest elevations. Winds up to 60 mph (96 km/h) may create blizzard conditions and hazardous driving.

Farther southwest, gusty winds and low humidity have triggered red-flag warnings across several states, indicating elevated wildfire risk.

To the east, the sharp contrast between cold air and warm, humid conditions across the central US is expected to fuel thunderstorms. The Storm Prediction Center warned of a 15% tornado probability Monday across four central states, home to nearly 900,000 people.