Category Archives: extratropical cyclones

How the Hadley Cells work

By Gui-Ying Yang The Hadley Cell, named after British meteorologist George Hadley who discovered this tropical atmospheric overturning circulation, is one of the basic concepts in weather and climate. Figure 1 shows the zonal mean overturning circulation in a latitude height … Continue reading

Posted in Climate, Climate change, Climate modelling, earth observation, Equatorial waves, extratropical cyclones, Tropical convection, Troposphere, Waves, Weather, Wind | Leave a comment

Sting jets in winter storms : how do the winds get so strong?

By Ambrogio Volonté Figure 1: Windstorm Tini (12 Feb 2014) passes over the British Isles bringing extreme winds. A sting jet has been identified in the storm. Image courtesy of NASA Earth Observatory The arrival of a winter storm battering … Continue reading

Posted in Climate, Climate change, extratropical cyclones, Monsoons, Numerical modelling, sting jet, University of Reading, Weather, Weather forecasting | Leave a comment

Tibetan Plateau Vortices

By Julia Curio Tibetan Plateau Vortices (TPVs) are meso-scale cyclones that originate over the Tibetan Plateau and move eastwards steered by the subtropical westerly jet above. These storms can also move off the Tibetan Plateau (TP) and travel as far … Continue reading

Posted in China, earth observation, extratropical cyclones, Flooding, Monsoons, Numerical modelling, University of Reading, Weather forecasting | Leave a comment

Stronger windstorms and higher wind risk in a warmer climate

By Oscar Martínez-Alvarado The most devastating type of winter storms to affect north-west Europe are characterised by a descending jet of air, known as a sting jet, that can result in strong, localised surface winds and wind gusts in a region … Continue reading

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Improving jet stream forecasts through observational experiment

By John Methven Weather systems developing over the North Atlantic and hitting Europe are intimately related to large-amplitude meanders of the jet stream, known as Rossby waves. Characteristic weather patterns grow in concert with the waves, and the jet stream … Continue reading

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The fair breeze blew, the white foam flew …

By Ray Bell In winter-time when the temperature gradient between the pole and the equator sharpens, the North Atlantic becomes a breeding ground for intense storms (extratropical cyclones). Occasionally associated with intense winter storms is a ‘phenomenal sea state’ (WMO … Continue reading

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The wet and stormy winter of 2013/14 over the British Isles

By Joaquim Pinto                            Department of Meteorology homepage Given its geographic position, the British Isles are often affected by extreme wet and stormy winter weather. Still, the large number … Continue reading

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Historical storms – a (very brief) book review

By Ben Harvey                         Department of Meteorology It has now been a year since the period of extreme storminess experienced in the UK during January and February 2014. High winds … Continue reading

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Observing the strong damaging winds of autumn and winter storms

By Oscar Martínez-Alvarado Some scientists are weird people. Take me as an example. It is summer, the sun is shining out there. Yet here I am, longing for autumn and winter and the storms they bring. Don’t get me wrong. … Continue reading

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