Thundery showers are now developing in parts of the Anglia region with one particularly heavy downpour moving north through parts of Cambridgeshire and Bedfordshire. A Met Office yellow warning for rain is currently in force for the rest of Friday because of the risk of further slow-moving thundery showers this afternoon and this evening.
According to the Met Office Chief Meteorologist:
A moist, unstable airmass will affect the area leading to heavy, slow-moving showers and a risk of hail and thunderstorms. Rainfall totals of 20-30mm are likely in a short space of time, perhaps exceeding 50mm very locally, whilst other locations may see very little.
The Met Office have issued several yellow weather warnings for rain in the Anglia region during the next few days as the weather turns increasingly unsettled.
According to the Met Office:
A deepening area of low pressure is likely to pass close to southeastern England on Friday. With very warm, humid air over the region there is the potential for the rain to become very heavy during the afternoon with totals of more than 50 mm locally.
Once Friday's rain has cleared, there'll be a brief interlude on Saturday with a mix of sunshine and blustery showers expected. However, there's a risk of further heavy rain and strong winds on Sunday if an ex-hurricane develops into a deep Atlantic low pressure system and heads towards the UK.
According to the Met Office:
The remains of Hurricane Bertha, over the western side of the Atlantic on Thursday morning, will come steadily towards the UK. The transition from a tropical to an extra-tropical feature is a particularly hard one to forecast with confidence, and computer models continue to differ in the location and intensity of the resulting depression, which is expected to pass over, or close to, the UK from early on Sunday.
There is the potential for widespread rainfall totals of more than 50 mm and coastal gusts of over 60 mph, along with large waves. However, the system may pass harmlessly to the south of the country... and the public are advised to keep up to date with warnings.
A torrential downpour in the early hours of Monday morning made Santon Downham in Suffolk the wettest place in the UK.
Between 1am and 11am, the site in Thetford Forest had 51.2 mm (2 inches) of rain which is close to the amount it receives during the whole of an average July. During just one hour at 5am, the weather station had 33 mm (1.3 inches) of rain.
The deluge was isolated and most places in the Anglia region had little or no rain by 10am Monday morning.
Norwich had 48.6 mm (1.9 inches) of rain on Sunday 20 July.
Rainfall totals averaged across the Anglia region during July have reached 56 mm (2.2 inches) which is 25% more rain than normal. But that average hides wide variations in the totals. Norwich has so far had 95 mm (3.7 inches) of rain during July while Bedford has had just 35 mm (1.4 inches).
The Anglia region is not as wet as July 2012 when there was 107 mm (4.2 inches) making it the second wettest July on record.
Torrential, thundery downpours are currently moving south through Essex, having developed this afternoon near Braintree. Rainfall rates greater than 32mm per hour are highlighted in white on the rainfall radar map. The Met Office issued a yellow warning earlier today for the risk of disruption due to localised heavy rain.