Charles Mix storm history

Thunderstorm wind gusts caused a driver in the westbound lane of South Dakota Highway 46 between Pickstown and Wagner to lose control, cross over into the eastbound lane, and collide head-on with an oncoming car, which resulted in the indirect fatality to both drivers.

Rainfall amounts across Charles Mix County from June 20-22 generally ranged from 2 to 5 inches. This rainfall worsened some minor water issues from thunderstorms earlier in the week, especially near Choteau Creek. Some overland flooding resulted in damage to many roads and culver…

Sustained northwest winds reached 40 to 44 mph with a peak gust of 61 mph 13 miles west of Platte.

Northwest winds were sustained between 40 and 53 mph at times, with gusts as high as 79 mph 13 miles west of Platte, 75 mph 4 miles west of Geddes, 66 mph 8 miles east of Wagner, and 58 mph near Wagner.

Wind chills reached as low as -30 degrees at Wagner and -26 degrees 8 miles east of Wagner.

Snowfall totaled 3.0 inches 2 miles northeast of Academy.

Synoptic northwest winds were occasionally sustained from 40 to 45 mph with gusts as high as 72 mph at a South Dakota Road Weather Information System site 13 miles west of Platte and 59 mph 8 miles east of Wagner.

A long-duration snowfall totaled 5.5 inches at Platte and 4.9 inches 2 miles northeast of Academy.

Sustained winds reached 40 to 46 mph, with gusts measured as high as 65 mph at the South Dakota Road Weather Information System site at the Platte-Winner Bridge 13 miles west of Platte, 61 mph at RAWS site 3 miles west of Geddes, and 58 mph at the Automated Weather Observing Syst…

Sustained winds briefly reached 40 to 42 mph with a peak wind gust of 58 mph at the South Dakota Road Weather Information System site near the Platte-Winner Bridge.

Winds were sustained from 30 to 39 mph for several hours, with a gust measured as high as 61 mph at 1535CST at the South Dakota Road Weather Information System site at the Platte-Winner Bridge.

Dangerous heat index values peaked as high as 105 degrees at Wagner on August 15 and 8 miles east of Wagner on August 16.

Heat index values peaked as high as 101 degrees near Platte and 3 miles west of Geddes, and 100 degrees 4 miles east-southeast of Wagner.

Thunderstorm wind gusts blew down 8-9 inch diameter healthy tree limbs.

Severe thunderstorm wind gusts were measured by a Road Weather Information System sensor at the Platte-Winner Bridge. A peak wind gust of 69 mph occurred at 1648 CST.

Thunderstorm wind gusts were measured by a personal weather station.

Thunderstorm wind gusts were measured by a personal weather station.

Thunderstorm wind gusts were measured by a Road Weather Information System sensor 4 miles northeast of Dante.

Dangerous heat index readings reached an afternoon peak as high as 117 degrees near Platte, 114 degrees 13 miles west of Platte, 111 degree near Geddes, and 110 degrees near Wagner.

Dangerous heat index readings reached daily afternoon peaks as high as 106 degrees at Wagner on July 22.

Thunderstorm wind gusts were measured by a personal weather station.

Thunderstorm wind gusts were measured by a personal weather station.

Thunderstorm wind gusts were measured by a personal weather station.

Thunderstorm wind gusts were measured by the Lake Andes RAWS station.

Winds measured by a personal weather station.

Thunderstorm wind gusts measured by a Road Weather Information System sensor 13 miles west of Platte.

Hail to quarter size was quite brief and intermixed with heavy rainfall.

Hail of various sizes up to golf ball occurred over an 8 minute period.

A member of the public provided a photo of lime-sized hail.

The South Dakota Mesonet site 3 NNW Academy measured a 69 mph severe wind gust at 1944 CST with a peak of 71 mph at 1947 CST.

Thunderstorm wind gusts measured by SD RWIS Platte-Winner Bridge.

Winds were measured by a personal weather station.

Daily afternoon and evening heat indices ranged from 105 to 115 degrees with a maximum heat index of 115 degrees at a personal weather station in Wagner on June 20, 113 degrees at a personal weather station near Platte on June 21, 107 degrees at the Road Weather Information Syste…

The ground was covered by pea to quarter-sized hail.

Sustained easterly winds reached 40 to 46 mph near Wagner with gusts as high as 60 mph 9 miles southwest of Platte.

While the highest winds were inconsistent over the period, winds did reach sustained levels from 40 to 43 mph at times with gusts up to 59 mph near Academy and Wagner.

Trees blown down in Geddes.

Thunderstorm wind gust measured by a personal weather station.

Thunderstorm wind gusts measured by a personal weather station. Barn door blown open along with a lot of blowing dust.

Thunderstorm wind gust was measured by a personal weather station.

Severe (D2) drought conditions improved to moderate (D1) by late month.

Hail was quarter size and slightly larger.

Weakening rain showers brought a brief period of gusty winds, which peaked at 58 mph 4 miles northeast of Dante.