![]() Marshall Radar Observatory), while being part of the network, was owned by McGill University. The Canadian network was thus gradually formed and by 1997, there were 19 weather radars of two kinds across the country: 18 five centimeter wavelength (C-Band) radars and 1 ten centimeter wavelength (S-Band) at McGill, all of the radars detected reflectivity but only Carvel (Edmonton), King City (Toronto) et McGill were equipped with Doppler capabilities.Įnvironment Canada received approval in 1998 to upgrade the network to Doppler standard and to add 12 more radars with the operational characteristics coming from King City weather radar station (CWKR), the research radar of Environment Canada. Marshall continued at McGill University the work with the "Stormy Weather Group". Research in weather radars in Canada began at the end of the Second World War with "Project Stormy Weather". Starting on 29 June 2022, a pilot project allow external users access to the raw data, possibly including the 400 km data. The range extensions are intended to provide forecasters at the Meteorological Service of Canada, part of Environment and Climate Change Canada, with radar information while nearby radars are being replaced as part of the renewal. Starting in June 2021, some of the radars' ranges will be extended to 400 km (250 mi) in the lowest angle of reflectivity data. Furthermore, the new radars are dual-polarized which means precipitation type can be estimated directly. The renewal of the network, from 2018 to 2023, with new S-Band radars brings these numbers respectively to 300 km (190 mi) for reflectivity and 240 km (150 mi) for full Doppler coverage. Their primary purpose is the early detection of precipitation, its motion and the threat it poses to life and property.Įach had until 2018 a range of 256 km (159 mi) in radius around the site to detect reflectivity, 3 angles with a range of 128 km (80 mi), for detecting velocity pattern ( Doppler effect), and an extra long range up to 240 km (150 mi) at low elevation angle but strongly folded or aliased (where the maximum unambiguous velocity interval (±Vmax) is less than the full range of velocities being measured which leads to some being displayed with the wrong values ). ![]() The Canadian weather radar network consists of 31 weather radars spanning Canada's most populated regions. The improved weather-data quality will also allow for more effective use of the information in other areas, such as water management, as radar images are used to understand the effects of precipitation on drainage basins, in particular in support of flood forecasting by provinces.Location of the weather radars in Canada. For example, weather-radar imagery is used to help in safely routing planes around severe weather. Better serving weather-sensitive industriesĮconomic sectors sensitive to weather events such as agriculture, natural resources, fisheries, construction, aviation, tourism, transportation, retail, and investors will benefit from higher data quality and consistency for severe-weather events as weather information is an important part of their strategic planning. Extending Doppler coverage of the weather-radar network will also allow for better overlap of neighbouring radars in case of an outage. Doubling the Doppler range will give Canadians greater lead time to protect themselves and their families from tornadoes and other severe weather. The new radars will also have an extended severe-weather detection range to cover more of Canada, increasing the Doppler range to 240 kilometres per radar from the current 120 kilometres. As a result, they will issue more precise and timely weather watches and warnings for these significant weather events, giving Canadians more lead time to take appropriate actions to protect themselves, their family, and their property from the effects of severe weather. This technology will also enable better identification and removal of non-meteorological targets such as birds, bugs, and debris from the data. These state-of-the-art radars will have fully integrated dual-polarization technology, which will enable forecasters to better distinguish between rain, snow, hail, and freezing rain as well as better discern the size, shape, and variety of precipitation particles. Halfmoon Peak, BC (Vancouver Island replacement site) (CASHP)ĭual polarization: a leading-edge technology Mont Apica, QC (Lac Castor replacement site) (CASMA) Shuniah, ON (Superior West replacement site) (CASSN) ![]() Current S-band deployment schedule (as of May 05, 2022) OrderĬold Lake, AB (Jimmy Lake replacement site) (CASCL)
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