TOMORROW'S forecast is for some strikes with the longer-term forecast of a possible weather blackout.

In an unusual industrial campaign, hundreds of Bureau of Meteorology staff will go on strike for an hour across Australia tomorrow as negotiations stall over a new pay deal.

If that strike fails to budge the bureau's management, staff will tomorrow discuss ''escalating'' their industrial action by placing a ban on providing weather forecasts or information on either television or radio.

But the action will not affect severe warnings for ''tropical cyclones, tsunamis, bushfires, floods, volcanic ash or severe thunderstorms''.

Community and Public Sector Union deputy national president Alistair Waters said the bureau's staff were ''deeply committed'' to their work so would continue to provide severe weather warnings.

He described a ban on providing more routine forecasts as ''very significant'' and an escalation in the dispute. Mr Waters said it was the first industrial action at the bureau for at least a decade.

''It demonstrates a degree of concerted anger,'' he said.

The union is pushing for a 4 per cent a year pay rise and Mr Waters said the bureau had made an offer that averaged 3 per cent a year - below inflation. Bureau management did not respond to a request for comment.

Meanwhile, Customs staff will strike at major international airports around Australia tomorrow with the CPSU saying that staff have become ''very frustrated'' at delays in settling the dispute.

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