The Environment Agency is warning that the rainfall will bring a risk of localised surface water flooding, particularly for parts of Norfolk, Suffolk and Essex.
The Agency says it is monitoring the situation closely and supporting local authorities who will respond to any reports of surface water flooding. There are teams out on the ground working to reduce the risk of flooding, but the Environment Agency will issue flood alerts and warnings for rivers if required.
"Heavy rainfall on Friday night into Saturday brings a risk of surface water flooding for parts of south and east England. If you’re driving away for the summer holidays, as always, please remember not to drive through flood water. People are urged to check their flood risk on our website, especially if you’re holidaying in an area where you’re not familiar with the flood risk."
Following a dry summer so far, the gardens are in need of a decent spell of rain. But that may be little consolation to anyone with outdoor plans this Friday, which could end up as the wettest day of the summer (and the year) so far in the Anglia region.
Weather prediction models are now in agreement that most places will suffer from a prolonged spell of wet and cold weather to end the first week of the school holidays.
There is currently a yellow weather warning in place which the Met Office was considering upgrading to amber.
There remains some uncertainty over the extent and the scale of the heaviest rainfall.
It is expected than many places in East Anglia will see 30 mm (1.2 inches) of rain but there is a risk that some places will see more than 60 mm (2.4 inches) of rain during Friday. That amounts to more than a month's worth of rain.
If this happens, it would be the wettest day so far this year in the Anglia region.
The Met Office says there is a small risk that one or two spots could see rainfall totals as high as 90 mm (3.5 inches) in 12 hours. That would be nearly two months of average rain.
A Met Office warning has been issued because that amount of rain could cause localised flooding and affect outdoor events and busy roads.
Winds will increase overnight, especially near the coast and could gust to 60 mph which is very strong for the time of year
Met Office Yellow Weather Warning
Valid from 1200hrs on Friday 24 July until 1100hrs on Saturday 25 July
The Met Offices says areas of rain, often heavy, and strengthening winds will cross much of southern England on Friday, persisting overnight in the east, before clearing on Saturday morning.
This is an update of Thursday's warning, advising of an increased likelihood of localised flooding, especially across southeast England and East Anglia, where the warning may yet be escalated to Amber. These areas are also most likely to be affected by northerly gales, with winds gusting to 45 mph inland and around 55 mph along coasts.
The public should be aware of the potential for disruption, particularly affecting those travelling or engaged in outdoor holiday activities.
The Met Office Chief Meteorologist says: "An area of low pressure will run northeastwards close to southern England on Friday, deepening into quite an intense feature for the time of year, before clearing to the east early on Saturday."
"While there remain some uncertainties in the track and intensity of this low pressure system, there is now an increased probability of a developed feature bringing disruptive rain and wind, particularly across the east of the area.
"More than 30 mm is expected quite widely but with the likelihood now that some areas could well see more than 70 mm of rain. The combination of factors brings the risk of disruption to outdoor activities and heavy holiday traffic.
"This warning may still be updated later on Friday, as further information becomes available.
Many parts of the region woke to thunder, lightning and heavy rain in the early hours of this morning.Read the full story ›
A huge inflatable water slide has been set up in Norwich city centre as part of the Lord Mayor’s Celebration events.
Hundreds of spectators lined the streets to see people having a go on 100-metre three lane SlideRider.
The slide was there to raise money for Cancer Research UK. It was also the perfect way to cool down in the heat!
Norwich was the hottest place in the UK at midday on Saturday 4th July 2015 with a temperature of 28.6°C (83.5°F) recorded at the city's international airport.
Many places in the Anglia region had their hottest July day on record on Wednesday when the thermometer touched 35.3°C (95.5°F) at Wittering in Cambridgeshire.
So the early hours of Saturday 4 July saw widespread electrical storms across East Anglia.
It seemed some of you took a few shots of the storms.
With every good heatwave in the British summer there is nearly always a spectacular thunderstorm or two.
The early hours of Saturday 4 July saw widespread electrical storms across East Anglia.
At Hitchin in Hertfordshire there was 35 mm of rain, which is more than normally falls in two weeks in July.
The overnight deluge make it the wettest day of the year so far in the East of England.
Rainfall totals in the Anglia region in the 12 hours to 10am on Saturday
- 21.4 mm in Bedford
- 21.2 mm in Woburn, Bedfordshire
- 17.6 mm in Monks Wood near Sawtry, Cambridgeshire
- 15.0 mm in Harpenden, Hertfordshire
- 13.6 mm in Holbeach, Lincolnshire
- 11.8 mm in Wattisham, Suffolk
- 8.0 mm in Writtle, Essex
- 7.2 mm in Cambridge
- 3.8 mm in Norwich
Animals at Woburn Safari Park in Bedfordshire have been keeping their cool in the searing heat.Read the full story ›