Saturday, April 9, 2011

Seasonal outlook: Mixed weather ahead - European Monsoon, Apr 02 - 14:04

*JUNE 2011* High pressure over the UK, a warm to very warm period through the first 5-7 days, a slack westerly over the extreme north where it may be cloudier with patchy rain, conditions may briefly cool through the 'shoulder' period into the second week as a slight north-westerly kicks in, then high pressure reasserts, bringing a return of fine, settled weather and increasingly warm to locally hot. Around mid-month is cools, possibly goes 'bang' and all areas see low pressure producing showers, theses heavy and thundery for a time, then easing, a slack area of low pressure then sits over the UK, southern areas of England seeing fewer showers with slightly higher pressure perhaps. The ubiquitous, mid-late June onset of 'The European Monsoon' sees conditions from third week taking a 'nose-dive', becoming unsettled everywhere with showers or longer spells of rain and feeling much cooler, than previously experienced, as low pressure slips into the UK and becomes slow moving. The period through to the end of the month should ten see all areas covered in a basic west-southwest flow, so temperatures up to average, so too the rainfall amounts, driest across southern England and Wales where the flow will be more anticyclonic at times, rather more unsettled across the northern slice of Britain. *JULY 2011* Mid-summer may begin with a 'June hangover' but this unsettled weather should be short-lived as high pressure is expected to be building strongly as it the temperature and humidity as the pattern takes on a distinctly more 'continental' flavour. A hot and humid spell is probable lasting into the second week across central, southern and eastern Britain, however further west and northwest an 'Atlantic change' will be underway. Heavy thundery showers will be breaking out as cooler and fresher conditions edge east driven by low pressure developing to the west and southwest, this change extending eastward through all areas by mid-July at the latest. The second half of July sees very different conditions through all areas with low pressure anchored over the top of the UK so expect heavy showers or longer spells of rain and quite breezy conditions, feeling quite cool for mid-summer too perhaps. Any drier and warmer spells will be mainly transitory and reserved mainly for southern areas across England and Wales, where again pressure may be somewhat higher at times. Only at the very end of July does it look as though 'true' summer returns, high pressure settling over the UK. Simon Email me at simon.keeling@weatheronline.co.uk


Source: http://feeds.weatheronline.co.uk/~r/weatheronline/~3/NVjQX8SESdQ/reports

Tim Cahill European Union Chamonix Yorkshire David Lynch Australasia

No comments:

Post a Comment