Large Hail and Damaging Winds Impact Brown and Day Counties on August 1st

Overview

A cluster of severe thunderstorms dropped southeast out of North Dakota and across northeastern Brown and western Day Counties, producing large hail and winds of 80-90 mph during the late evening of August 1, 2016. The combination of the hail and winds led to significant damage to trees, crops, and buildings in and around Andover. The following pictures come from an NWS Storm Survey of the damage during the morning and early afternoon of August 2, 2016.

Storm reports across Brown and Day Counties during the late evening hours on August 1, 2016

Wind & Hail
Radar

Wind & Hail:

Wind

The strong winds associated with the thunderstorm were estimated to reach 80-90 mph, possibly exceeding those values in isolated locations, as the storm moved through the Andover area. This led to extensive tree and crop damage, along with damage to several buildings. Additional building and tree damage was noted to the west and south of Bristol.


Tree uprooted in a park off Main Street in Groton	Threshermen's Park building (Andover) removed from foundation and moved over 100 feet.	Damage to a barn located 1 mile east of Andover	Metal outbuilding removed from foundation 1 mile east of Andover


Metal from the outbuilding 1 mile east of Andover was thrown northeast across Highway 12	Metal from the outbuilding 1 mile east of Andover was thrown northeast across Highway 12. Some of the metal was up to two tenths of a mile away from the building	Roof removed from an outbuilding 3 miles west-northwest of Bristol	Wall of a building resting on a second building 3 miles west-northwest of Bristol

Building removed from foundation and moved to the east, 3 miles north of Andover

Hail

Hail up to the size of golf balls were reported with the storm and when driven eastward by 80-90 mph winds, the hail produced damage to the siding of several buildings around Andover. In addition to the building damage, corn and bean crops were damaged or destroyed by both the hail/wind to the northwest and southeast of Andover.


Wind driven hail damage to a house on the west side of Andover	One of the several buildings in Threshermen's Park in Andover that were damaged by hail.	Hail damaged corn 4.5 miles northwest of Bristol	Soybean crop damage from hail 4.5 miles northwest of Bristol


Hail still on the ground in Threshermen's Park around 12 hours after it fell	MRMS estimate of the maximum hail size from the Groton to Andover area. Estimates indicate that hail over 3" in diameter fell to the north of Highway 12.

Radar:

Radar images as the storm moved from Groton to Bristol


Radar Image as the storm moved through Groton around 11:15 PM	Radar Image as the storm moved over Andover around 11:31 PM	Radar Image as the storm moved east of Andover around 11:36 PM	Radar Image as the storm neared Bristol around 11:42 PM

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