Weather around the World 2018

Weather around the World 2018

Wed, 27/06/2018 - 12:54
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Whilst the UK is in the middle of a prolonged period of relatively warm and dry weather, the weather elsewhere in Europe has been more varied, with unseasonable rain and snow.  An active depression over the Balkans and southern Italy in late June may have been partly associated with the warm, settled weather over western Europe – the High responsible dragged in air from Southern Russia which is perhaps cooler and more unstable than the usual air mass over the Eastern Mediterranean.

The onset of the Indian summer monsoon occurs over the Bay of Bengal in late May, and then over Kerala, southern India, within a week of the 1st of June. The monsoon then progresses north and west across the subcontinent, covering the whole of India by mid-July. The retreat of the monsoon from India typically occurs during September but is more varied in its progression than the onset. You can see the current state of the monsoon at http://www.imd.gov.in/pages/monsoon_main.php  

It is generally the case that the weather in the Eastern Mediterranean becomes settled at around the time of the onset of the monsoon as one of the main descending branches of the Asian monsoon is in that region. However, in the late June, after a pretty well normal first few weeks, the monsoon weakened, and it may be that the descending branch over the eastern Mediterranean has also weakened, allowing depressions to be more active in that region.

A tropical depression has brought flooding to Texas: https://earthobservatory.nasa.gov/IOTD/view.php?id=92329&eocn=image&eoci=moreiotd

Meanwhile, much of the SW USA is in severe drought conditions - see http://droughtmonitor.unl.edu/CurrentMap.aspx. This is a long term drought, exacerbated by recent dry weather.

Globally, we are currently in a neutral El Niño/ La Niña period, having recently moved from weak La Niña conditions.

The 2018 Atlantic hurricane season began on 1st June but, as yet, there have been no hurricanes. NOAA's Climate Prediction Center is forecasting a 75% chance that the 2018 Atlantic hurricane season will be near- or above-normal.