Power Outage in Atlantic, IA

Cass County Emergency Manager reported several outbuildings damaged and power poles down along Glendale Road about 1/2 mile east of Highway 148, southeast of Anita. This is a delayed report and time estimated from radar.

Public reported three inch tree limbs down and power poles broken.

Law enforcement reported trees down, power lines down, and transformers blown in town.

Large tree limbs down. Power was out for 1 to 2 hours in Atlantic.

A large tree and power lines were toppled along Olive Street south of Interstate 80.

A large tree limb fell onto a power line which subsequently fell onto a truck.

A cooperative observer in Atlantic measured 3.32 inches of rain overnight. It rained for a little over 2 hours with most of the rain falling in an hour. Minor flooding was also reported in streets and low lying areas throughout Atlantic with scattered power outages reported as well.

Tree limbs and branches were downed. Some were large. One power line was blown down.

Winds of 60 MPH were reported with trees and powerlines down in town.

Widespread tree and power line damage was reported.

A strong shortwave moved through the base of the parent upper level trough kicking off a line of showers and thunderstorms stretching from south central Iowa into central and western Missouri by early afternoon. A dry line was located further west across eastern Nebraska into NE Kansas. The airmass became weakly unstable as surface temperatures warmed into the mid 70s with dewpoints in the mid 60s. CAPE values were between 500 and 1000 J/kg with a downdraft CAPE of 600 J/kg, and 100 J/kg of CAPE in the -10 to -30 C layer of the atmosphere. The lifted index was around -3 C and available moisture had decreased some from previous days with precipitable water values around 1.5 inches. The atmosphere was moderately sheared with 40 kts of deep layer shear available. The line of storms intensified toward mid to late afternoon as the atmosphere destabilized. The northern end of the line moved through Davis County with damaging winds occurring in the Pulaski area. There were numerous large trees and power lines down in town with many roofs damaged by the falling trees. A line of storms had developed earlier in the day along the dry line in Nebraska and Kansas. The line of storms pushed into southwestern Iowa by late evening. One storm intensified briefly on the leading edge and produced wind damage in the town of Atlantic and pea size hail.

Thunderstorms moved into southwest Iowa from the west. The storms were decaying as they advanced into the state. One of the storms moved through Cass County in Griswold and caused damage. High winds downed trees in town and knocked down power lines.