Intense twin winter storms graze across central and eastern U.S. this week
The active Polar Vortex southern lobe is blazing across the Northern Hemisphere, producing significant cold waves across the North American continent. Two major storms are …
Polar Vortex Split Update: A Breakaway vortex is forecast to move into North America, bringing a colder pattern in February
A Stratospheric Warming event is going to start in the coming days. We see a weakening and a split of the Polar Vortex in the …
The highest ever measured thunderstorms – how high can they go?
How high into the sky can thunderstorms develop – what are the highest ever measured thunderstorms? The most vigorous updrafts reach the tropopause and produce …
Winter Storm Garnett: A foot of snow expected in the Northeast U.S. on Sunday
The active Polar Vortex is grazing across the Northern Hemisphere, affecting Siberia and North America. It produces wave after wave across the continent and is …
The Cryosphere
The cryosphere is a fundamental and integral part of the climate system, and it has important linkage and feedback with the major components of the …
Stratospheric Warming Watch: A rare Polar Vortex split is Forecast to bring Cold Weather into United States and Canada
A strong Stratospheric Warming event is starting to appear in the forecast for February. It shows a weakening and a split of the Polar Vortex. …
Convective initiation: Understanding thunderstorm development
Convection initiation typically starts along boundary-layer convergence zones. These zones have long been known to be key factors in convection initiation and further storm evolution. …
February 2025 Forecast: After a mild start, a new Polar Express is looming for the United States and Canada mid-month
February 2025 is about to start, with the latest weather forecasts indicating a very dynamic month over the United States and Canada. After the power …