Ka rite ki maha St. Helens o mua eruptions, tenei hanga nui lahars (volcanic mudflows) me waipuke paru e pā ana e toru o nga awa e wha pūnaha wai i runga i te maunga, a ka timata ki te neke rite wawe rite 8:50 a.m. Lahars haere rite tere rite 90 maero ia (140 km / h) i te mea tonu tiketike i runga i te puia, engari āta whakamutua ki e pā ana ki toru maero ia haora (4.8 km / h) i runga i te wahi papa, me te whānui o awa. i waipuke i te tonga me te rawhiti taha i te pūmau o te raima rite ratou raced ki raro i Pine Pine Creek, a Smith Creek ki te nuinga o te hukapapa i runga. i te Lewis Creek Bridges i te upoko o St. Helens, i kite i enei nui atu lahars (volcanic mudflows) me waipuke paru rere i roto i te awa nui i muri i muri i te puia i roto i te awa nui, engari i kawea atu i runga i te awa nui i te awa i muri i te awa i te awa
raima papu