"Heavy rain" set to batter Portsmouth and Hampshire with flooding "likely" - when and hour by hour forecast

The Met Office has issued a yellow weather warning for rain. It will be in place from tomorrow morning (December 18) at midnight until 9pm.

“Some heavy rain will affect southern counties of England during Thursday, perhaps causing some disruption to travel, along the with the possibility of some flooding,” the Met Office said. “Widely 15-25 mm is likely across the warning area, but 40-60 mm may fall in some places, most likely over the Downs.

“Rain will clear to the east by the end of the day. Strong winds, perhaps gusting in excess of 50 mph in some exposed coastal areas, will accompany the rain, perhaps exacerbating the impacts in a few places.”

The forecaster said flooding is likely to impact a few homes and businesses. Journey times on public transport are expected to take longer, with spray and flooding on the roads possible.

Power supplies and other services may be interrupted. The warning covers Portsmouth, Gosport, Havant, Fareham, Waterlooville, Hayling Island, and most of Hampshire. Here is an hour by hour of the forecast tomorrow.

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When will it rain in Portsmouth?

5am - 12C - light rain - 12mph winds

6am - 12C - light rain - 10mph winds

7am - 12C - light rain - 10mph winds

8am - 12C - light rain - 10mph winds

9am - 12C - heavy rain - 12mph winds

10am - 12C - heavy rain - 14mph winds

11am - 12C - heavy rain - 17mph winds

12pm - 12C - heavy rain - 19mph winds

1pm - 12C - heavy rain - 21mph winds

2pm - 12C - heavy rain - 23mph winds

3pm - 13C - heavy rain - 24mph winds

4pm - 13C - heavy rain - 25mph winds

5pm - 13C - heavy rain - 25mph winds

6pm - 13C - light rain - 23mph winds

7pm - 12C - light rain - 20mph winds

8pm - 12C - light rain - 17mph winds

9pm - 12C - light rain - 15mph winds

10pm - 11C - partly cloudy - 13mph winds

11pm - 11C - partly cloudy - 12mph winds