Xilliga koritaanka wuxuu ku kala duwan yahay laga bilaabo 90 maalmood sanadkiiba Iron Range ilaa 160 maalmood koonfur-bari Minnesota oo u dhow Wabiga Mississippi, heerkulka celcelis ahaanna wuxuu u dhexeeyaa 37 ilaa 49 ° F (3 ilaa 9 ° C). Celceliska heerkulka xagaaga wuxuu u dhexeeyaa qiyaastii 58 ° F (14 ° C) koonfurta ilaa qiyaastii 48 ° F (9 ° C) waqooyiga.
19 illaa 35 inji (48 illaa 89 cm)