The warning kicks in at 9am on SaturdayMet Office map for yellow weather warning for rain set to begin 9am Saturday, September 20It looks like we’re in for another wet weekend

It never rains but it pours.

That’s a pretty accurate summary of Greater Manchester’s weather so far this month. And after a few days respite from the downpours it looks like much of the region is in for another sodden weekend.

The Met Office has issued a 21 hour yellow weather warning for rain. It runs from 9am on Saturday to 6am and Sunday.

It covers the coastal regions of Wales and much of the north of England, including the northern parts of Greater Manchester, and southern Scotland.

Forecasters warn we could be in for ‘persistent and at times heavy’ downpours with up to 20-40mm of rain expected to fall widely, although the worst hit areas could see up to 100mm. Strong winds and the odd burst of thunder could also accompany the showers.

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The Met Office forecast reads: “Rainfall will spread north-eastwards on Saturday, and become persistent and at times heavy. Through this period 20-40 mm of rain is expected to fall widely, with some locations perhaps seeing 75-100 mm, with much of this total falling in the later hours of the event.

“From mid-Saturday onwards, increasingly strong gusty winds and perhaps some thunder will also accompany the rainfall, further increasing the risk of disruption.

“By the early hours of Sunday, persistent heavy rain will have likely cleared from Wales, with this rain easing for Northern England and Scotland by dawn on Sunday morning.

“Showers then follow and winds remain strong through Sunday.”

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The warning comes after the Met Office placed much of the country under warnings for wind last weekend. Looking ahead to next week and beyond, conditions look set to remain unsettled.

The Met Office outlook for the whole of the UK between September 22 and Wednesday October 1, reads: “Into next week, a northwest-southeast split is most likely.

“The best of drier spells will be in the north and northwest where some fog and frost patches are possible, but there will be spells or rain or showers in south and eastern areas, near to an area of low pressure. It will also turn colder, as a northerly flow becomes established for a time.”

It continues: “Temperatures should gradually return closer to average in this period. Later in the period there may be a return to a more changeable pattern but this is uncertain.”