Aurora storm history

Rainfall amounts across Aurora County from June 20-22 ranged from 3 to 9 inches. Widespread overland flooding ensued. Numerous county and township roads were impacted by flood waters and closed. Interstate 90 was closed near the Aurora/Davison County line and South Dakota Highway…

Northwest winds were sustained between 40 and 52 mph at times, with gusts as high as 66 mph 4 miles west of Plankinton and at a South Dakota Mesonet site in White Lake.

Snowfall totaled 4.5 inches 4 miles southwest of Stickney.

Wind chills reached as low as -31 degrees at a South Dakota Mesonet site at White Lake and -30 degrees 4 miles west of Plankinton.

Synoptic northwest winds were occasionally sustained from 40 to 44 mph with gusts as high as 61 mph at a South Dakota Road Weather Information System site 4 miles west of Plankinton and 58 mph at the South Dakota Mesonet site at White Lake.

Snowfall totaled 1.5 inches 3.8 miles southwest of Stickney and 1.2 inches at White Lake.

A long-duration snowfall totaled 5.4 inches at White Lake and 5.0 inches 4 miles southwest of Stickney. During a brief break in snowfall during the evening of November 28, a period of light freezing rain and freezing drizzle resulted in a few hundredths of an inch ice accumulatio…

Sustained winds reached as high as 42 mph at a South Dakota Mesonet site near White Lake.

Sustained winds briefly reached 40 to 44 mph with a peak wind gust of 58 mph at the South Dakota Mesonet site near White Lake.

A full-sized tree with an estimated diameter of at least 16 inches was broken in half. Some minor building damage occurred from the thunderstorm wind gusts.

An extended period of thunderstorm severe wind gusts were measured by South Dakota Mesonet station WTES2 White Lake.

Thunderstorm wind gusts were measured by a Road Weather Information System sensor 5 miles west of Plankinton.

Thunderstorm wind gusts were measured by a personal weather station 3 miles northeast of Plankinton.

A second distinct period of severe thunderstorm wind gusts were measured by a Road Weather Information System sensor 5 miles west of Plankinton.

Hail ranged in size up to quarter size.

Thunderstorm wind gusts were measured by a Road Weather Information System sensor near Plankinton.

A funnel cloud developed over White Lake.

Dangerous heat index readings reached an afternoon peak as high as 115 degrees near Plankinton and 109 degrees at South Dakota Mesonet site WTES2 near White Lake on July 27.

Thunderstorm winds downed several 3-to-4-inch diameter tree branches across Plankinton.

The emergency manager measured a thunderstorm wind gust of 73 mph.

The emergency manager measured a thunderstorm wind gust of 70 mph.

Thunderstorm wind gusts were measured by a personal weather station.

Heat index values peaked during the afternoon hours of July 22 as high as 100 degrees near Plankinton.

An extended period of severe wind gusts measured by South Dakota RWIS site near Plankinton.

Winds were measured by a personal weather station, with a peak gust at 2041 CST.

Several 4 inch diameter tree limbs were downed by thunderstorm winds.

Daily afternoon and evening heat indices ranged from 102 to 108 degrees with a maximum heat index of 108 degrees at the Road Weather Information System site near Plankinton and 107 degrees at the South Dakota Mesonet site near White Lake on June 20.

Hail was mostly pea to dime size, but a few stones were as big as a nickel.

Sustained easterly winds reached 35 to 42 mph with gusts as high as 64 mph near White Lake.

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

Snowfall totaled 2.5 inches 3.8 miles southwest of Stickney and 2.3 inches in White Lake.

Sustained winds reached 40 to 42 mph at times near Plankinton.

Snowfall totaled 3.6 inches at White Lake and 3.5 inches 3.8 miles southwest of Stickney.

Snowfall totaled 1.4 inches at White Lake and 1.0 inches near Stickney. Northerly winds sustained from 30 to 38 mph, which gusted as high as 53 mph near Plankinton, resulted in visibility briefly less than one mile with hazardous travel conditions.

Severe (D2) drought conditions persisted through the month.

Winds were sustained at 30 to 37 mph with a peak gust of 49 mph near Plankinton and 46 mph near White Lake.

The lowest wind chills ranged from 35 to 44 below zero with 44 below zero observed at the South Dakota Mesonet site near White Lake.

The lowest wind chills ranged from 35 to 38 below zero with 38 below zero observed at the South Dakota Road Weather Information System site near Plankinton.

Wind chill temperatures ranged from 25 to 34 below zero during the early morning hours. A South Dakota Road Weather Information System site near Alexandria briefly dipped as low as 38 below zero.

Wind chill temperatures ranged from 25 to 34 below zero during the early morning hours. A South Dakota State University Mesonet site near White Lake briefly dipped as low as 37 below zero.

Snowfall totaled 7.0 inches 3.8 miles southwest of Stickney and 4.5 inches at White Lake.

Severe (D2) drought conditions persisted through the month.

The lowest wind chills ranged from 35 to 42 below zero with 42 below zero observed at the South Dakota Road Weather Information System site near Plankinton.

Severe (D2) drought conditions persisted through the month.