00000nam 2200000za 4500 9.868699 CaOODSP 20241203113646 m go d f cr ||||||||||| 190221e19800528bcca|||fo| f000 0 eng d CaOODSP eng CaOODSP rda n-cn-bc En57-44/80-014E-PDF Horita, Mert, author. The effect of Mount St. Helen's volcanic eruption, May 18, 1980 on ceilings and visibilities over southeastern B.C. / Mert Horita, senior development meteorologist. Vancouver : Pacific Weather Centre, May 28, 1980. 1 online resource (2 pages, 10 unnumbered pages) : illustrations text txt rdacontent computer c rdamedia online resource cr rdacarrier Pacific region technical notes ; no. 80-014 Digitized edition from print [produced by Environment and Climate Change Canada]. Caption title. "At 1531Z Sunday May 18, 1980 Mt. St. Helens situated at 46.12N, 122.12W erupted. ... Due to the prevaling winds below 500 mbs, the effects of the ash fallout extended into southeatern B.C. Reduced ceiling and visibilities were recorded for up to 2 days." gccst Weather gccst Volcanoes gccst Satellite imagery Canada. Environment Canada. Canada. Atmospheric Environment Service. Pacific Region. Canada. Atmospheric Environment Service. Pacific Weather Center. Pacific region technical notes (Canada. Atmospheric Environment Service. Pacific Region) no. 80-014 (CaOODSP)9.865532 PDF 5.02 MB https://publications.gc.ca/collections/collection_2019/eccc/en57-44/En57-44-80-014-eng.pdf