Replacement of the Superior West Weather Radar

The purpose of the project is to decommission the existing Superior West Weather Radar located near Thunder Bay, ON and to install a new weather radar system in Shuniah, ON. The new Shuniah radar will continue to provide coverage for northern Ontario and will consist of a 25 m open lattice steel tower with an 11.8 m diameter radome at the top (sphere covering the antenna) for a total height of approximately 39 m including lightning protection rods. The new radar will operate at frequency of 2850MHz.


The radar is located near 10-140 Tower Road, Shuniah, Ontario P7A 0W2, a property that ECCC requested a transfer of adminstration and control from the Government of Ontario. The geographic coordinates of the proposed radar site are 48.595876°, -89.100129°.


For more information:


Latest update

Notice of Determination

Shuniah, ON – September 20, 2021 – Environment and Climate Change Canada (ECCC) and Innovation, Science and Economic Development Canada (ISEDC) have determined that the proposed project for the replacement of the Superior West Weather Radar with the new Shuniah Weather Radar is not likely to cause significant adverse environmental effects.


This determination was based on a consideration of the following factors:

  • impacts on rights of Indigenous peoples;
  • Indigenous knowledge;
  • community knowledge;
  • comments received from the public; and
  • technically and economically feasible mitigation measures. 


ECCC and ISEDC are satisfied that that the carrying out of the project is not likely to cause significant adverse environmental effects. Therefore, ECCC and ISEDC may carry out the project, exercise any power, perform any duty or function, or provide financial assistance to enable the project to be carried out in whole or in part.


Key documents

Key documents
Document Number Document Title File Date
1 Replacement of the Superior West Weather Radar - Public Comments Invited - August 11, 2021


Sylvain Laramée, Director - Canadian Weather Radar Replacement Program
4905 Dufferin St
North York, Ontario M3H 5T4

  • Location

    • Shuniah, ON (Ontario)
  • Nature of Activity

    • Other, not otherwise specified
  • Assessment Status

  • Start Date

  • Proponent

    Environment and Climate Change Canada (ECCC)
  • Authorities

    • Environment and Climate Change Canada
    • Industry Canada
  • Assessment Type

    Project on federal lands
  • Reference Number


This map is for illustrative purposes. The markers represent the approximate locations based on available data. More than one marker may be identified for a given assessment.


Nearby assessments

...within 200 kilometres
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