Sustained winds of up to 80 miles per hour caused extensive tree damage in portions of the Region Monday evening where trained spotters reported a sustained wind of 70 to 80 miles per hour for several minutes in the Griffith and Hammond areas. The National Weather Service issued a severe thunderstorm warning that has since lapsed prior to the storm's arrival.
Trees fell on power lines throughout northwest Indiana, causing widespread power outages especially in Gary, Hammond, Griffith, Highland, Merrillville, Munster and parts of Hobart.
Multiple large trees were reported down near I-80/94 and US-41 in the Highland area causing traffic lights to reportedly go out along US-41 near Ridge Road.
Traffic tipsters reported numerous other trees down including a large tree across Ridge Road in Munster that took out high tension lines, large branches across Cline Avenue near 15th Avenue.
Other storm damage reported by the National Weather Service included many large tree limbs down on Utah Street in Gary after a reported wind gust of 70 miles an hour went through the area. A 79 mile per hour gust was reported in burns Harbor.
INDOT reported several fallen trees blocked westbound US-20 before US-12/Dunes Highway.
Meanwhile both Lowell and Valparaiso reported 58 mile per winds during the storm, according to the National Weather Service.
Much of the northwest Indiana listening area remains under a severe thunderstorm watch until 11 p.m. CST Monday night.