The flood alert, for the Llynfi and Ogmore catchments, follows a weather warning from the agency.
The Met Office has issued a yellow weather warning for heavy rain across large parts of England.
An amber weather warning has been issued meaning disruption to the roads and public transport is expected.
The Met Office has issued a severe weather warning for heavy snow across the west country on Friday.
The Met Office has issued a yellow weather warning for the North East of England for Friday.
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Motorists in Herefordshire are being warned to expect more snow as the Met Office issued a yellow weather warning.
The conditions led the Met Office to issue an extreme weather warning for London and the south east of England.
The Met Office has issued an amber weather warning across Yorkshire and said "significant snow accumulations" were likely on higher ground.
Environment Agency flood warnings for the Rivers Frome, Avon, and Stour remained in place, along with a Met Office yellow weather warning.
The storms in the early hours of Tuesday followed a weather warning issued by the Met Office for parts of south-east England.
An amber weather warning has been issued for parts of North Yorkshire, with up to 10cm (4in) of snow expected to fall overnight.
The Met Office issued a weather warning for the East Midlands with some parts of the region expecting up to 10cm (4ins) of snow.
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The Met Office issued a weather warning for the East Midlands with some parts of the region getting up to 10cm (4ins) of snow.
Forecasters say up to 50mm (2in) of rain could fall in parts of the country on Saturday, and the Met Office has issued an early severe weather warning.
The Met Office has issued a severe weather warning for South East England for Friday, warning of snow throughout the region - including much of East and West Sussex - and a danger of some drifting.
Residents of Moore had 36 minutes from the time the National Weather Service issued its warning until the time the twister entered the city.
An amber warning of severe weather has been issued by the Met Office for the South West.
The Weather Channel meteoroligists are still warning that the Hurricane Irene will hit Massachusestts as a category one.
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The Met Office said a yellow warning for severe weather remained in place but the snow would ease off throughout the day.
The Met Office has issued a yellow warning for severe weather in the West Midlands with temperatures expected to remain near freezing.
The National Weather Service said a tornado warning was issued as radar indicated a possible tornado moving from Kingfield, Maine, to Bingham, Maine.
The National Weather Service issued a blizzard warning through early Saturday afternoon and predicted up to 2 feet of snow and wind gusts of up to 60 mph.
The Met Office has issued an early warning of severe weather, with further rain and showers forecast to sweep across the Yorkshire and Humber region throughout the weekend.
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"Current indications are that this heat wave will continue well into next week, though there is still some uncertainty in the forecast, " the National Weather Service said in its warning around St.
The National Weather Service said a red flag warning was in effect until Friday evening.
By late Thursday, the National Weather Service had issued a blizzard warning from 6 a.m.
The National Weather service issued a winter storm warning for the New York area this morning.
In fact, the National Weather Service dropped its winter storm warning for the Washington area Wednesday afternoon.
The weather service issued a rare tornado warning as a line of thunderstorms raced through New Hampshire into western Maine.
In the 1950s, needing the price of onions to rise, he bribed the weather bureau to issue a frost warning.
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