From summer 2007 onwards, we have been plagued by excessive wetness during summers with individual summer months often returning 100mm+ rainfall totals but this summer has been very dry so far. This month could be the driest summer month for England and Wales since August 1995.
Look how dry that GFS 12 op run was, no accumulated rainfall at all for tip of Cornwall even at 384hrs (7th July)
The AMO has taken on a negative appearance, which differs to the state it's been in during the majority of recent summers, and this could well be a factor as some research has shown a link between a negative AMO and drier summers across far-NW Europe including the UK.
ECM 12z offers plenty of sunshine and high temperatures, followed by a very gradual destabilisation at the weekend (yes, okay, typical timing eh?) with conditions remaining very warm or quite hot where the sun keeps finding a way through.
Based on the tendency of model output in general of late, I expect that shallow low would soon exit SE of the UK to allow for further ridging from the Azores, though there are signs it may not be such a strong feature as we're looking at next week. Then again... next week's ridge was once looking much weaker with the chance of changeable westerlies continuing across the north!
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https://twitter.com/peacockreports 2021's Homeland Extremes:
T-Max: 30.4°C 21st Jul | T-Min: -6.8°C New Years Day! | Wettest Day: 34.1mm 2nd Oct | Ice Days: 2 (27th Jan & 8th Feb)
Keep Calm and Forecast On