Full Breakdown
Sudden Stratospheric Warming Forecast to Impact February Weather
1/24/2026, 11:46:27 PM
Major Stratospheric Warming Event Developing
Meteorological forecasts indicate a significant sudden stratospheric warming (SSW) event is forming over the Arctic, expected to weaken the polar vortex in early February 2026. This phenomenon is characterized by a rapid temperature rise in the Arctic stratosphere, with predictions of temperature increases exceeding 40°C (104°F) at 10 hPa in certain polar regions. The European Centre for Medium-Range Weather Forecasts (ECMWF) and the Global Forecast System (GFS) have noted that this warming will disrupt the polar night jet, potentially leading to a split in the polar vortex. This split could direct one core of the vortex toward North America and another toward Eurasia, facilitating the southward movement of Arctic air.
Implications for Weather Patterns
The anticipated weakening of the polar vortex is likely to alter jet-stream dynamics, increasing the risk of Arctic air intrusions into North America and northern Europe during the latter half of February. As the stratospheric disturbances propagate downward, surface effects may manifest one to three weeks post-warming, potentially leading to colder conditions across the Northern Hemisphere. Current forecasts suggest that the Arctic Oscillation (AO) and North Atlantic Oscillation (NAO) may enter negative phases, typically associated with colder air over continental regions.
Regional Forecasts and Temperature Anomalies
Forecasts for February 2026 show mixed surface temperature anomalies, with cold risks primarily confined to higher latitudes. In North America, particularly central and eastern Canada and the United States, repeated cold-air intrusions are expected. Meanwhile, northern and northwestern Europe may experience colder-than-average conditions, while southern Europe is projected to remain near or slightly above average. The Met Office has indicated that while mild conditions may affect the south and southwest of the UK, colder air is likely to dominate the northeast, increasing the risk of wintry weather.
Criticism and Uncertainties
Despite the forecasts, there are uncertainties regarding the magnitude of surface cooling and the persistence of stratospheric-tropospheric coupling. Experts have noted that while La Niña can influence jet-stream behavior, its effects on stratospheric disturbances are indirect and probabilistic. The Met Office has cautioned that predictions can only be reliably made about a week in advance, and current long-range forecasts suggest a mix of wet and windy weather for most regions.
Verbatim Quotes
- “Experts at Severe Weather Europe said: "The latest forecasts show a potential full collapse of the Polar Vortex, following a Stratospheric Warming event in early February.” — Severe Weather Europe
- “The spokesperson continued: “As the cold air from high up in the stratosphere disperses, it can affect the shape of the jet stream as the cold air sinks from the stratosphere into the troposphere.” — Met Office
This sudden stratospheric warming event is poised to significantly influence weather patterns across the Northern Hemisphere, with potential implications for temperature and precipitation in February 2026.
