Following snowfall on the 9th, another center of arctic high pressure built into the northern Plains. Wind chills from -20 to -30 occurred during the early- to mid-morning hours.
Every event with a place to put it; 15 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS FSD wrote it up.
Following snowfall on the 9th, another center of arctic high pressure built into the northern Plains. Wind chills from -20 to -30 occurred during the early- to mid-morning hours.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Sioux Falls, SD wrote its last area forecast discussion before the first event at Feb 9, 4:48 PM CST, 10 hours 12 minutes earlier.
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</html>The national radar mosaic for the moment the first event began.
15 cold/wind chill. Local standard time, as filed.
Westerly winds around 10 mph and temperatures from -5 to -10 produced wind chills as low as -29 at Huron, -27 at Madison, -26 at Brookings, -24 at Parkston, and -23 at Mitchell, Chamberlain and White Lake.
Westerly winds around 10 mph and temperatures from -5 to -10 produced wind chills as low as -29 at Huron, -27 at Madison, -26 at Brookings, -24 at Parkston, and -23 at Mitchell, Chamberlain and White Lake.
Westerly winds around 10 mph and temperatures from -5 to -10 produced wind chills as low as -29 at Huron, -27 at Madison, -26 at Brookings, -24 at Parkston, and -23 at Mitchell, Chamberlain and White Lake.
Westerly winds around 10 mph and temperatures from -5 to -10 produced wind chills as low as -29 at Huron, -27 at Madison, -26 at Brookings, -24 at Parkston, and -23 at Mitchell, Chamberlain and White Lake.
Westerly winds around 10 mph and temperatures from -5 to -10 produced wind chills as low as -29 at Huron, -27 at Madison, -26 at Brookings, -24 at Parkston, and -23 at Mitchell, Chamberlain and White Lake.
Westerly winds around 10 mph and temperatures from -5 to -10 produced wind chills as low as -29 at Huron, -27 at Madison, -26 at Brookings, -24 at Parkston, and -23 at Mitchell, Chamberlain and White Lake.
Westerly winds around 10 mph and temperatures from -5 to -10 produced wind chills as low as -29 at Huron, -27 at Madison, -26 at Brookings, -24 at Parkston, and -23 at Mitchell, Chamberlain and White Lake.
Westerly winds around 10 mph and temperatures from -5 to -10 produced wind chills as low as -29 at Huron, -27 at Madison, -26 at Brookings, -24 at Parkston, and -23 at Mitchell, Chamberlain and White Lake.
Westerly winds around 10 mph and temperatures from -5 to -10 produced wind chills as low as -29 at Huron, -27 at Madison, -26 at Brookings, -24 at Parkston, and -23 at Mitchell, Chamberlain and White Lake.
Westerly winds around 10 mph and temperatures from -5 to -10 produced wind chills as low as -29 at Huron, -27 at Madison, -26 at Brookings, -24 at Parkston, and -23 at Mitchell, Chamberlain and White Lake.
Westerly winds around 10 mph and temperatures from -5 to -10 produced wind chills as low as -29 at Huron, -27 at Madison, -26 at Brookings, -24 at Parkston, and -23 at Mitchell, Chamberlain and White Lake.
Westerly winds around 10 mph and temperatures from -5 to -10 produced wind chills as low as -29 at Huron, -27 at Madison, -26 at Brookings, -24 at Parkston, and -23 at Mitchell, Chamberlain and White Lake.
Westerly winds around 10 mph and temperatures from -5 to -10 produced wind chills as low as -29 at Huron, -27 at Madison, -26 at Brookings, -24 at Parkston, and -23 at Mitchell, Chamberlain and White Lake.
Westerly winds around 10 mph and temperatures from -5 to -10 produced wind chills as low as -29 at Huron, -27 at Madison, -26 at Brookings, -24 at Parkston, and -23 at Mitchell, Chamberlain and White Lake.
Westerly winds around 10 mph and temperatures from -5 to -10 produced wind chills as low as -29 at Huron, -27 at Madison, -26 at Brookings, -24 at Parkston, and -23 at Mitchell, Chamberlain and White Lake.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Dakota in 2018Every state in 2018This day in weather historyWarnings in South Dakota, February 2018
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-30. Each event’s entry at NCEI: 741439, 741440, 741441, 741442, 741443, 741444, 741445, 741446, 741447, 741448, 741449, 741450, 741451, 741452, 741453.