The Bureau of Meteorology has plans to complete the local weather forecast in most states and monitor the climate of only two major centers.
By 2020, all local forecasting services will be moved to two centralized units based in Melbourne and Brisbane, according to the Community and Public Sector Union.
The change could put communities at risk during extreme weather events, and forecasters can not predict wildfires and cyclones remotely.
More than 200 forecasters across the country were informed of the news last week, in what is the biggest shock the office has experienced in 110 years.
The Bureau of Meteorology has plans to finalize the local weather forecast in most states and only works in two main centers
The ABC reported that the union is "horrified" by the plan, as up to 40 people could lose their jobs in Perth alone.
CPSU organizer Melanie Booth said the forecasters are trained to predict the weather for the vast landmass that covers western Australia.
"They have accumulated their experience on that and the weather patterns here for a good 10 to 15 years, some of them, if not more," said Ms. Booth.
She believes that if the units were centralized, the quality of the services would be greatly reduced.
There is a fear that if there is more than one major incident occurring across the country, the larger population centers may attract attention first.
"The other thing is the nuances of people who know in time to evacuate and things like that, there are fewer controls on that," said Booth.
The office issued a statement in which it said it was discussing the proposed "transformation". with employees and promised to provide localized experience to each state.
By 2020, all local forecasting services will be moved to two centralized units based in Melbourne and Brisbane.
There is a fear that if there is more than one major incident occurring across the country, the larger population centers may attract attention first
"The statements of cost cuts and job losses are simply false and there are no plans to eliminate the local office presence of any state or territory," the statement said.
"A proposed new approach to improving services, which is being discussed in consultation with staff, clients and stakeholders, would involve general forecasting services that would be moved to specialized centers, allowing local staff to have more time to provide expertise. specialized to key state sectors such as services, agriculture and energy emergencies.
"An additional benefit would be the creation of new teams of experts focused on providing advice on the main natural hazards that affect life and property."
Daily Mail Australia has contacted the Bureau of Meteorology to receive comments.