Administrators are to close all five Welsh Jessops stores with the loss of more than 30 jobs.
The stores in Cardiff, Aberystwyth, Llandudno, Swansea and Wrexham will also shut their doors with 32 staff losing their jobs.
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The heaviest bursts are expected in the south and east, with some western areas either remaining dry or becoming dry by dawn.
Many places will start dry, but rain in the southeast will spread to most for a time overnight.
The family of Isaac Nash who went missing after being swept out to sea last summer have presented a cheque for £10,000 to the RNLI.