00000nam 2200000zi 4500 9.946499 CaOODSP 20250103111040 m o d f cr |n||||||||| 250103e198906##oncb ob f000 0 eng d CaOODSP eng rda CaOODSP n-cn-on En57-61/89-2E-PDF Hogue, Richard, 1960- author. The 17 September 1988 weak tornadic storm in Metro Toronto / by Richard Hogue, Paul Joe, Tom Nichols. [Toronto] : Environment Canada, Atmospheric Environment Service = Environnement Canada, Service de l'environnement atmosphérique, June 1989. 1 online resource (8 pages, 7 unnumbered pages) : maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Ontario region technical notes ; ORTN-89-2 Digitized edition from print [produced by Environment and Climate Change Canada]. Issued also by the Ontario Weather Centre. Includes bibliographical references (page 8). "During the late afternoon of Saturday 17 September 1988, a weak tornado briefly touched down in the Etobicoke area, just northeast of Toronto's Pearson International Airport. During that day, the development of localized convective activity occured in southern Ontario. Following a few morning thunderstorms in the Georgian Bay area, widely scattered showers formed in the late afternoon. At 2030Z, two cells developed rapidly into small thunderstorms with tops briefly reaching the 8-10 km range. One of them spawned a very weak tornado. Due to their very short life span and limited spacial and vertical extent the duty forecasters dismissed these cells as sources of severe weather. However, the analysis of the Doppler radial velocity data by the mesocyclone detection algorithm identified the potential for severe storms nearly one hour before the event. The use of this information would have significantly altered the nowcasting of this situation. This marginal event was therefore rather unusual because the reflectivity structure of the storm did not provide any classical indication of severity"--Introduction. Tornadoes Ontario. Tornadoes Ontario Toronto Case studies. Tornades Ontario. Tornades Ontario Toronto Études de cas. Case studies lcgft Études de cas rvmgf Canada. Atmospheric Environment Service (Ontario Region)‏, issuing body. Canada. Ontario Weather Centre, issuing body. Ontario region technical notes ; ORTN-89-2. (CaOODSP)9.938921 PDF 1205 KB https://publications.gc.ca/collections/collection_2025/eccc/en57/En57-61-89-2-eng.pdf