National Weather Service United States Department of Commerce

Dangerous Heat Continues Across the South for Memorial Day; Severe Thunderstorms Along the East Coast

A dangerous early-season heat wave over south Texas, the Central Gulf Coast, and southern Florida will persist through Memorial Day. At or near record daily high temperatures and heat index readings over 115 degrees are possible. Along the eastern seaboard, strong to severe thunderstorms are expected to develop this afternoon and linger into the evening hours. Read More >

Weather History Archive

Weather History - July 15th

Local and Regional Events:

July 15, 1885:

The first of three damaging tornadoes hit 7 miles NNE of Highmore, Hyde County, and moved to the northeast. Two small homes were destroyed before the funnel turned to the east, then northeast and north before lifting. This tornado was estimated to have an F2 strength and was seen in all directions for 20 miles. The second tornado appeared to be motionless 3 miles east of Harrold, and then moved east to Holabird, in Hyde County, where it destroyed two homes and dissipated. A third tornado, this one with an estimated F3 strength, formed to the west of Highmore and moved east into town, then lifted about 4 miles east of town. Three homes were destroyed, and about 20 other buildings were damaged at Highmore. A farmer was killed 2 miles east of town. Losses totaled about $55,000, which included many new buildings, including a church and a skating rink.


July 15, 1986:

Thunderstorms brought locally heavy rainfall to portions of Walworth to Marshall Counties. Three inches of rain in an hour and a half was reported in extreme northwest Marshall County. The highest rainfall amount was seven inches southeast of Bowdle. The rains caused lowland flooding, with water over several roads in Marshall County, including Highway 10, two miles east of Britton. In Britton, 3.86 inches of rain was reported.

July 15, 2006:

Record heat occurred across central and north central South Dakota and into parts of northeast South Dakota. Afternoon high temperatures ranged from 105 to as high as 120 degrees. Record highs were set at Pierre, Mobridge, Kennebec, and Timber Lake. Pierre set a new all-time record high of 117 degrees, and Mobridge tied their all-time record high of 116 degrees. Kennebec and Timber Lake both hit a record high temperature of 112 degrees. The coop observer station 17 miles west-southwest of Fort Pierre tied the state record high temperature with 120 degrees. Other high temperatures for the day were 116 degrees at Onida and Mission Ridge, 114 degrees at Murdo, 112 degrees at Redfield and Blunt, 111 degrees at Stephan, 110 degrees at Conde and Gann Valley, and 109 degrees at Aberdeen.


July 15, 2011:

A large upper-level high-pressure area built over the region bringing sweltering and humid conditions. This heat was the worst to hit the area since July 2006. Beginning on Friday, July 15th and persisting through Wednesday, July 20th, many locations experienced high temperatures in the 90s to lower 100s, with low temperatures in the 70s at night. Also, humidity levels rose to extreme levels. Surface dew point temperatures in the 70s and lower 80s brought extreme heat index values of up to 110 to 125 degrees. The dew points were some of the highest ever recorded in the region on July 17th. The dew point at Aberdeen tied the previous record with 82 degrees. Sisseton also tied their record with 83 degrees. Watertown came a degree shy of matching their record with 80 degrees.

The prolonged heat took its toll on livestock with fifteen hundred cattle perishing during the heat. Numerous sports and outdoor activities were canceled. Some of the highest heat index values included; 110 degrees at Mobridge; 111 degrees at Watertown; 113 degrees at Miller and Gettysburg; 114 degrees at Wheaton and Faulkton; 116 degrees at Pierre; 118 degrees at Sisseton; and 121 degrees at Aberdeen. The highest heat index value occurred at Leola with a temperature of 98 degrees and a dewpoint of 82 degrees, and the heat index hit 125 degrees. Click HERE for more information.


U.S.A and Global Events for July 15th:

1888: The Bandai volcano erupts on the Japanese island of Honshu on this day in 1888, killing hundreds and burying many nearby villages in ash. Click HERE for more information from the History Channel.


1901: The city of Marquette, Michigan set their all-time record high temperature with 108-degree reading.


Click HERE for more This Day in Weather History from the Southeast Regional Climate Center.