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World Summary

Vancouver 0°C 32°F
Mexico City 24°C 75°F
Honolulu 23°C 73°F
10°C 50°F New York
30°C 86°F Buenos Aires
Reykjavik 1°C 34°F
London 4°C 39°F
Cairo 10°C 50°F
20°C 68°F Cape Town
-13°C 9°F Moscow
25°C 77°F Kuala Lumpur
-1°C 30°F Tokyo
21°C 70°F Sydney

Features & Analysis

Sudden stratospheric warming

Sudden Stratospheric Warming responsible for UK's icy blast

The icy blast moving across the UK has its roots high up in the stratosphere days ago. As BBC Weather's John Hammond writes, it makes longer-term forecasting unusually tricky.

Alex Deakin

Sudden Stratospheric Warming also to affect the US

Sudden stratospheric warming is also set to affect the US with a cold plunge expected across much of the continent. BBC Weather's Alex Deakin reports.

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Forecast Video

North America Forecast Last updated 12:57, Saturday 12 Jan Cannot play media. You do not have the correct version of the flash player. Download the correct version

In Pictures

  1. A grey cloud sweeps over most of the photo, producing hail over a bay. In the distance a little bit of blue sky and white fluffy clouds can be seen.
  2. A blanket of cloud on a front, is pink and purple over dark land.
  3. Small trees are covered with snow. In the distance, more snow can be seen covering the hills.
  4. A white arc can be seen in mist. In the foreground is a field.
  5. Sunrise has painted clouds in the sky yellow. A flock of birds flying over dark trees and houses below.