Less than one week after strong winds knocked down trees and knocked out power for 31,000 Washtenaw County residents, another storm system is on its way toward the region.
“We’re looking at some very strong weather coming through Wednesday,” national weather service meteorologist Matt Mosteiko said.
“We have a 45 percent chance of severe storms in Ann Arbor and the surrounding area.”
Mosteiko said those storms could be capable of producing wind gusts in excess of 60 miles per hour and may produce isolated tornados in the area.
Tornado probabilities are only released by the national weather service in its one-day forecast, but the storm system is given a 10 percent chance of producing a tornado in its most severe area on Tuesday.
Wednesday should start warm, with temperatures reaching as high as 80 degrees before noon, with clouds increasing throughout the morning and early afternoon.
“Between 2 p.m. and midnight is when we’re expecting most of the rain and the thunderstorms,” Mosteiko said.
The severe weather will be caused by the collision of two very different types of air combined with a low-pressure system that encourages rain and storms.
“What we have is a very tropical and moist air mass that’s going to be colliding and clashing through a low pressure system with a cold front and with cold Canadian air,” he said.
“When you have cold dry air colliding with warm moist air, that differential helps create those stronger winds and heavy rains.”
The storms should start hitting the west side of the state Wednesday morning, so a better idea of their severity as they reach the Ann Arbor area will be available then.
Current National Weather Service forecasts include more than three quarters of an inch of rain in the area and sustained winds of more than 15 miles per hour during the storm.
MLive’s chief meteorologist Mark Torregrossa has been closely tracking this storm system. Read his most recent post here.