Blizzard and Ice Storm in South Dakota, April 10 to 12, 2019

Name: Blizzard and Ice Storm in South Dakota, April 10 to 12, 2019
Start: 2019-04-10T07:00
End: 2019-04-12T04:00
Location: South Dakota

April 10 to 12, 2019 · NWS FSD · 24 events in 24 counties and zones

A historic late-season, multi-day winter storm developed rapidly across the central Plains on Wednesday, April 10. This system spiraled several periods of wintry precipitation through the region.

Where it happened

Every event with a place to put it; 24 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: $5.0 million
Crop damage: None recorded
Events: 24

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.

What happened

The episode as NWS FSD wrote it up.

A historic late-season, multi-day winter storm developed rapidly across the central Plains on Wednesday, April 10. This system spiraled several periods of wintry precipitation through the region. The leading precipitation on April 10 was a mix of rain, freezing rain and sleet from far eastern South Dakota through the Interstate 90 areas of southwest Minnesota and northwest Iowa, changing to snow to the north and west. There were even a few elevated thunderstorms which occurred overnight on April 10-11 and produced some near severe hail, which actually occurred after some initial wintry precipitation. Significant icing was centered around 30 miles either side of the Interstate 90 corridor, with as much as a third to three-quarters inch ice accumulation.

Heavy snowfall developed from the early morning of April 11 and continued into the early morning of April 12 across much of southeast South Dakota into northern portions of southwest Minnesota, which accumulated to 1 to 2 feet during the storm. The most persistent snowfall occurred for areas west to north of Sioux Falls, but even there, a brief period of freezing rain or sleet occurred at some point ahead of the main upper trough passage.

The other aspect of this storm was the intense winds, which gusted at the peak from 40 to 60 mph, producing widespread blizzard conditions to southeast South Dakota and southwest Minnesota. Considerable power outages occurred as transmission lines succumbed to the ice accumulation and wind. At the peak, electric companies and cooperatives estimated as many as 25,000 customers were without power. Many areas were without power for a day or two due to the intensity of the storm. The strong winds lofted dust from the Texas/Oklahoma panhandles which caused some of the snowfall toward the latter portions of the event to fall with a brownish color.

What forecasters said that day

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 Apr 10, 5:58 AM CST, 1 hour 2 minutes earlier.

Area forecast discussion, Apr 10, 5:58 AM CST, 1 hour 2 minutes before

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Hazardous weather outlook, Apr 10, 3:41 AM CST, 3 hours 19 minutes before

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
441 AM CDT Wed Apr 10 2019

MNZ071-072-080-081-097-SDZ038>040-050-052>061-063>065-068-110945-
Lincoln-Lyon-Murray-Cottonwood-Pipestone-Beadle-Kingsbury-
Brookings-Gregory-Jerauld-Sanborn-Miner-Lake-Moody-Brule-Aurora-
Davison-Hanson-McCook-Charles Mix-Douglas-Hutchinson-Bon Homme-
441 AM CDT Wed Apr 10 2019

This Hazardous Weather Outlook is for portions of southwest
Minnesota, central South Dakota, east central South Dakota, south
central South Dakota, and southeast South Dakota.

.DAY ONE...Today and Tonight

A mix of rain, freezing rain, sleet and snow will be possible
along highway 14 this morning. A tenth of an inch of ice and 1 to
3 inches of snow will be possible into early afternoon. The snow
will begin to become more widespread in central South Dakota
during the afternoon. By this evening into Thursday the intensity
of the snow will increase as will the winds, which will bring
blizzard conditions to a large area of central and east central
South Dakota. Some parts of the blizzard warning from Pipestone to
Windom could see some potentially significant icing this evening
and overnight as well.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

Hazardous conditions will continue Thursday night into Friday with
blowing snow still possible. By Thursday night much of the area
will see a fresh foot or more of snowfall.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

IAZ001>003-MNZ089-090-098-SDZ062-066-067-069-070-110945-
Lyon-Osceola-Dickinson-Nobles-Jackson-Rock-Minnehaha-Turner-
Lincoln-Yankton-Clay-
441 AM CDT Wed Apr 10 2019

This Hazardous Weather Outlook is for portions of northwest Iowa,
southwest Minnesota, and southeast South Dakota.

.DAY ONE...Today and Tonight

Showers and isolated thunderstorms will be possible early this
morning, then again this evening into the overnight hours.
Interstate 90 from around Sioux Falls into southwest Minnesota and
Interstate 29 from Sioux Falls south towards Beresford will see
the highest potential for changeable conditions tonight into
Thursday. There will be the chance for rain, freezing rain, sleet
and snow tonight and if the temperature at the surface can remain
cold enough, some significant icing around a quarter to a half
of an inch will be possible.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

By late Thursday morning the area will begin to transition to snow
with anywhere from 1 to 6 inches possible, depending upon how much
warm air wraps westward into the area.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

IAZ012>014-020>022-031-032-NEZ013-014-SDZ071-110945-
Sioux-O'Brien-Clay-Plymouth-Cherokee-Buena Vista-Woodbury-Ida-
Dixon-Dakota-Union-
441 AM CDT Wed Apr 10 2019

This Hazardous Weather Outlook is for portions of northwest Iowa,
west central Iowa, northeast Nebraska, and southeast South
Dakota.

.DAY ONE...Today and Tonight

Rain will develop tonight and continue with a few thunderstorms
possible from roughly 8 pm through midnight. A few of these storms
could produce hail to the size of dimes as well as frequent
lightning.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

By Thursday night rain may briefly transition to light freezing
rain or snow with an inch or less of accumulations expected.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

18 blizzard, 4 winter storm, 2 ice storm. Local standard time, as filed.

Winter Storm, Yankton

When: April 10, 7:00 AM CST to April 12, 3:00 AM CST
Where: Yankton forecast zone
Reported by: COOP Observer
Coordinates: 43.009, -97.395 (the zone’s center; the record gives no point)

A large gradient in storm-total snowfall from 2 to 12 inches occurred, with 11.0 inches 10 miles north of Lesterville and 4.0 inches at Yankton. Some areas had snow drifts of several feet, making roads nearly impassable.

Winter Storm, Turner

When: April 10, 12:00 PM CST to April 12, 4:00 AM CST
Where: Turner forecast zone
Property damage: $48,000
Reported by: Department of Highways
Coordinates: 43.311, -97.149 (the zone’s center; the record gives no point)

Ice accumulation and near blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the extremely hazardous conditions. A period of freezing rain, sleet and snow resulted in ice accumulations starting the afternoon of April 10 through early April 11 of one-third to one-half inch. As winds increased and gusted as high as 59 mph at Sioux Falls, widespread power outages resulted as power poles snapped and transmission lines were downed. Several communities were without power at times between the evening of April 10 and April 12, including Marion, Parker, Dolton and Viborg. Property damage costs include damage to utilities.

A large gradient in storm-total snowfall from 2 to 10 inches occurred, with 9.3 inches at Marion and 4.5 inches at Hurley. Some areas had snow drifts of several feet, making roads impassable.

Winter Storm, Minnehaha

When: April 10, 2:00 PM CST to April 12, 4:00 AM CST
Where: Minnehaha forecast zone
Property damage: $735,000
Reported by: Official NWS Observations
Coordinates: 43.674, -96.791 (the zone’s center; the record gives no point)

Ice accumulation and near blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the extremely hazardous conditions. Interstate 90 was closed from Sioux Falls westward, and Interstate 29 was closed from Sioux Falls northward from the evening of April 10 through noon on April 12. A period of freezing rain, sleet and snow resulted in ice accumulations starting the afternoon of April 10 through early April 11 of one-half to three-quarters of an inch. As winds increased and gusted as high as 59 mph at Sioux Falls, widespread power outages resulted as power poles snapped and transmission lines were downed.|Up to 10,000 customers around Sioux Falls were without power at times between the evening of April 10 and April 12, as well as the communities of Humboldt and Hartford where warming shelters were established by local government. Property damage costs include damage to utilities.

Storm-total snowfall from 2 to 7 inches occurred, with 6.5 inches at Wall Lake, 6.0 inches at Colton, 5.2 inches at the Sioux Falls Airport and 3.8 inches near Garretson. Many areas had snow drifts of several feet, making roads impassable.

Winter Storm, Lincoln

When: April 10, 2:00 PM CST to April 12, 4:00 AM CST
Where: Lincoln forecast zone
Property damage: $38,000
Reported by: Official NWS Observations
Coordinates: 43.279, -96.722 (the zone’s center; the record gives no point)

Ice accumulation and near blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the extremely hazardous conditions. A period of freezing rain, sleet and snow resulted in ice accumulations starting the afternoon of April 10 through early April 11 of one-quarter to one-half inch. As winds increased and gusted as high as 59 mph at Sioux Falls, scattered power outages resulted as power transmission lines were downed. Up to 10,000 customers around Sioux Falls were without power at times between the evening of April 10 and April 12, as well as the communities of Harrisburg, Lennox, Tea, Canton, Fairview, Beresford and Worthing. Property damage costs include damage to utilities.

Storm-total snowfall from 1 to 6 inches occurred, with 5.5 inches at Canton and southern Sioux Falls.

Ice Storm, Clay

When: April 10, 3:00 PM CST to April 11, 10:00 AM CST
Where: Clay forecast zone
Reported by: Law Enforcement
Coordinates: 42.915, -96.976 (the zone’s center; the record gives no point)

Ice accumulated to a quarter to half inch across the northern portions of Clay County. Irene reported a half inch of ice accumulation, and as winds increased during the overnight and early day on April 11, scattered power outages resulted as stress from ice accumulation took down power lines. Snowfall toward the end of the storm produced accumulations of 1 to 4 inches, with 1.0 inches at Vermillion and 1.2 inches 5 miles south southeast of Centerville.

Ice Storm, Union

When: April 10, 3:00 PM CST to April 11, 10:00 AM CST
Where: Union forecast zone
Property damage: $2,000
Reported by: Law Enforcement
Coordinates: 42.833, -96.656 (the zone’s center; the record gives no point)

Ice accumulated to a quarter to half inch across the northern portions of Union County. Areas near Beresford and Alcester reported a quarter to half inch of ice accumulation, and as winds increased during the overnight and early day on April 11, scattered power outages resulted as stress from ice accumulation took down power lines. Snowfall toward the end of the storm was minimal, from a trace to 2 inches. Property damage costs include damage to utilities.

Blizzard, Beadle

When: April 11, 1:00 AM CST to April 12, 1:00 AM CST
Where: Beadle forecast zone
Reported by: Official NWS Observations
Coordinates: 44.415, -98.278 (the zone’s center; the record gives no point)

Blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the widespread whiteout conditions. Almost unprecedented amounts of storm-total snowfall occurred, with amounts of 18.0 inches at Huron, 25.0 inches 2 miles southeast of Wessington (second greatest 3-day snowfall total on record) and 29.8 inches near Hitchcock. With winds gusting up to 51 mph at Huron, many areas had snow drifts of 5 to 10 feet, making roads impassable. Spotty power outages occurred.

Blizzard, Jerauld

When: April 11, 1:00 AM CST to April 12, 1:00 AM CST
Where: Jerauld forecast zone
Reported by: Department of Highways
Coordinates: 44.066, -98.630 (the zone’s center; the record gives no point)

Blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the widespread whiteout conditions. Almost unprecedented amounts of storm-total snowfall occurred, with the 3-day snowfall of 20.0 inches at Wessington Springs the second greatest 3-day snowfall total on record. With winds gusting to around 50 mph, many areas had snow drifts of 5 to 10 feet, making many roads impassable. Spotty power outages occurred.

Blizzard, Brule

When: April 11, 1:00 AM CST to 6:00 PM CST
Where: Brule forecast zone
Reported by: AWOS
Coordinates: 43.718, -99.081 (the zone’s center; the record gives no point)

Blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the widespread whiteout conditions. Interstate 90 was closed from late on April 10 through noon on April 12. Ice accumulation of one to two tenths of an inch occurred prior to snowfall. Storm-total snowfall from 10 to 17 inches occurred, with 10.8 inches at Chamberlain, 12.0 inches at Pukwana and 16.3 inches 8 miles south southwest of Chamberlain. With winds gusting at times to around 50 mph, many areas had snow drifts of several feet, making roads impassable. Spotty power outages occurred.

Blizzard, Kingsbury

When: April 11, 2:00 AM CST to April 12, 1:00 AM CST
Where: Kingsbury forecast zone
Reported by: Emergency Manager
Coordinates: 44.370, -97.491 (the zone’s center; the record gives no point)

Blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the widespread whiteout conditions. Almost unprecedented amounts of storm-total snowfall occurred, with the 3-day snowfall of 26.5 inches at De Smet and 19.8 inches at Iroquois both setting the second greatest 3-day snowfall total on record for the site. With winds gusting at times to around 50 mph, snow drifts to several feet made many roads impassable. Spotty power outages occurred.

Blizzard, Sanborn

When: April 11, 2:00 AM CST to April 12, 1:00 AM CST
Where: Sanborn forecast zone
Reported by: Department of Highways
Coordinates: 44.023, -98.091 (the zone’s center; the record gives no point)

Blizzard, Miner

When: April 11, 2:00 AM CST to 11:00 PM CST
Where: Miner forecast zone
Reported by: Department of Highways
Coordinates: 44.022, -97.610 (the zone’s center; the record gives no point)

Blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the widespread whiteout conditions. Storm-total snowfall reached 10 to 15 inches, with 13.4 inches at Howard. With winds gusting at times to around 50 mph, snow drifts to several feet made many roads impassable. Ice accumulated to one to two tenths of an inch, with winds resulting in spotty power outages.

Blizzard, Aurora

When: April 11, 2:00 AM CST to April 12, 1:00 AM CST
Where: Aurora forecast zone
Property damage: $59,000
Reported by: Mesonet
Coordinates: 43.718, -98.561 (the zone’s center; the record gives no point)

Blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the widespread whiteout conditions. Interstate 90 was closed from late on April 10 through noon on April 12. Ice accumulation of one-quarter to one-half inch occurred prior to snowfall. Storm-total snowfall from 10 to 15 inches occurred, with 15.0 inches 4 miles southwest of Stickney, 13.8 inches at Plankinton and 12.0 inches at White Lake. With winds gusting at times to around 50 mph, many areas had snow drifts of several feet, making roads impassable. Spotty power outages occurred. Property damage costs include damage to public infrastructure and utilities.

Blizzard, Gregory

When: April 11, 2:00 AM CST to 6:00 PM CST
Where: Gregory forecast zone
Reported by: Department of Highways
Coordinates: 43.192, -99.186 (the zone’s center; the record gives no point)

Blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the widespread whiteout conditions. Storm-total snowfall from 8 to 15 inches occurred, with 14.0 inches at Gregory, 12.2 inches 4 miles southwest of Burke and 12.0 inches at Bonesteel. With winds gusting at times to around 50 mph, many areas had snow drifts of several feet, making roads impassable. Ice accumulation of one to two tenths of an inch occurred, resulting in spotty power outages as wind increased.

Blizzard, Charles Mix

When: April 11, 2:00 AM CST to 6:00 PM CST
Where: Charles Mix forecast zone
Reported by: Department of Highways
Coordinates: 43.208, -98.588 (the zone’s center; the record gives no point)

Blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the widespread whiteout conditions. Storm-total snowfall from 10 to 18 inches occurred, with 17.0 inches at Wagner, 13.0 inches at Platte and 12.0 inches 2 miles northeast of Academy. With winds gusting at times to around 50 mph, many areas had snow drifts of several feet, making roads impassable. Ice accumulation of one to two tenths of an inch occurred, resulting in spotty power outages as wind increased.

Blizzard, Lake

When: April 11, 3:00 AM CST to 8:00 PM CST
Where: Lake forecast zone
Property damage: $2.9 million
Reported by: AWOS
Coordinates: 44.022, -97.129 (the zone’s center; the record gives no point)

Blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the widespread whiteout conditions. Storm-total snowfall reached 6 to 15 inches, with 12.5 inches at Madison. With winds gusting at times to 40 to 50 mph, snow drifts to several feet made many roads impassable. Ice accumulated to one-quarter to one-half inch, with numerous power lines brought down as wind increased. The city of Madison was without power from late April 10 into the morning of April 11. Property damage costs include damage utilities.

Blizzard, Brookings

When: April 11, 3:00 AM CST to 3:00 PM CST
Where: Brookings forecast zone
Reported by: AWOS
Coordinates: 44.370, -96.790 (the zone’s center; the record gives no point)

Blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the widespread whiteout conditions. Interstate 29 was closed from the evening of April 10 through noon on April 12. Storm-total snowfall from 7 to 18 inches occurred, with 18.0 inches 2 miles south southeast of Astoria, 16.0 inches 5 miles west of Bruce, 10.3 inches at Brookings and 7.8 inches near White. With winds gusting at times from 40 to 50 mph, many areas had snow drifts of several feet, making roads impassable. Ice accumulation up to a tenth of an inch occurred, resulting in spotty power outages as wind increased.

Blizzard, Moody

When: April 11, 3:00 AM CST to 3:00 PM CST
Where: Moody forecast zone
Property damage: $840,000
Reported by: Emergency Manager
Coordinates: 44.022, -96.671 (the zone’s center; the record gives no point)

Blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the widespread whiteout conditions. Interstate 29 was closed from the evening of April 10 through noon on April 12. Storm-total snowfall from 4 to 8 inches occurred, with 8.0 inches 11 miles north of Colman and 5.4 inches at Flandreau. With winds gusting at times from 40 to 50 mph, many areas had snow drifts of several feet, making roads impassable. Ice accumulation of one-quarter to one-half inch occurred, resulting in scattered power outages as wind increased. Property damage costs include damage to utilities.

Blizzard, Davison

When: April 11, 3:00 AM CST to April 12, 1:00 AM CST
Where: Davison forecast zone
Property damage: $94,000
Reported by: ASOS
Coordinates: 43.675, -98.146 (the zone’s center; the record gives no point)

Blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the widespread whiteout conditions. Interstate 90 was closed from late on April 10 through noon on April 12. Ice accumulation of one-quarter to one-half inch occurred prior to snowfall. Storm-total snowfall from 10 to 18 inches occurred, with 17.0 inches at Mount Vernon and 16.2 inches at Mitchell, matching the April 2-day maximum snowfall on record. Winds gusted at Mitchell as high as 69 mph, and many areas had snow drifts of several feet, making roads impassable. Spotty power outages occurred. Property damage costs include damage to utilities.

Blizzard, Hanson

When: April 11, 3:00 AM CST to 10:00 PM CST
Where: Hanson forecast zone
Property damage: $19,000
Reported by: Department of Highways
Coordinates: 43.675, -97.787 (the zone’s center; the record gives no point)

Blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the widespread whiteout conditions. Interstate 90 was closed from late on April 10 through noon on April 12. Ice accumulation of one-quarter to one-half inch occurred prior to snowfall. Storm-total snowfall from 8 to 14 inches occurred, with 11.5 inches at Alexandria, third highest 3-day April snowfall on record. Winds gusted at Mitchell as high as 69 mph, and many areas had snow drifts of several feet, making roads impassable. Spotty power outages occurred. Property damage costs include damage to utilities.

Blizzard, Douglas

When: April 11, 3:00 AM CST to 10:00 PM CST
Where: Douglas forecast zone
Reported by: Emergency Manager
Coordinates: 43.387, -98.366 (the zone’s center; the record gives no point)

Blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the widespread whiteout conditions. Storm-total snowfall from 12 to 20 inches occurred, with 18.0 inches 10 miles west of Dimock, 14.0 inches 2 miles south of Armour and 13.0 inches 5 miles west of Armour. With winds gusting at times to around 50 mph, many areas had snow drifts of several feet, making roads impassable. Ice accumulation of one to two tenths of an inch occurred, resulting in spotty power outages as wind increased.

Blizzard, Hutchinson

When: April 11, 3:00 AM CST to 8:00 PM CST
Where: Hutchinson forecast zone
Reported by: Emergency Manager
Coordinates: 43.335, -97.754 (the zone’s center; the record gives no point)

Blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the widespread whiteout conditions. Storm-total snowfall from 8 to 16 inches occurred, with 14.0 inches at Parkston and 10.0 inches at Menno and 11 miles south of Emery. With winds gusting at times over 50 mph, many areas had snow drifts of several feet, making roads impassable. Ice accumulation of one to two tenths of an inch occurred, resulting in spotty power outages as wind increased. Power was lost for numerous hours for the communities and areas surrounding Freeman and Menno.

Blizzard, Bon Homme

When: April 11, 3:00 AM CST to 8:00 PM CST
Where: Bon Homme forecast zone
Reported by: COOP Observer
Coordinates: 42.988, -97.885 (the zone’s center; the record gives no point)

Blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the widespread whiteout conditions. Storm-total snowfall from 8 to 15 inches occurred, with 10.5 inches at Tyndall. With winds gusting at times over 50 mph, many areas had snow drifts of several feet, making roads impassable. Ice accumulation of one to two tenths of an inch occurred, resulting in spotty power outages as wind increased.

Blizzard, McCook

When: April 11, 5:00 AM CST to 8:00 PM CST
Where: McCook forecast zone
Property damage: $296,000
Reported by: Department of Highways
Coordinates: 43.674, -97.368 (the zone’s center; the record gives no point)

Blizzard conditions led to a shutdown of government offices and schools, and travel was not recommended due to the widespread whiteout conditions. Interstate 90 was closed from late on April 10 through noon on April 12. Storm-total snowfall from 7 to 14 inches occurred, with 14.0 inches at Bridgewater, the highest 3-day April snowfall on record. Winds gusted at times from 50 to 60 mph, and many areas had snow drifts of several feet, making roads impassable. Ice accumulation of one-quarter to one-half inch occurred prior to snowfall, and numerous power outages occurred as wind increased. Power was lost for the communities of Bridgewater, Canistota, Montrose and Salem, as well as surrounding areas, with some customers without power for more than two days. Property damage costs include damage to utilities.

What these are

Winter Storm: A storm that brought snow, sleet or freezing rain at warning levels, usually over several hours or days.
Ice Storm: Freezing rain accumulating a quarter inch or more of ice, or less where it caused significant damage.
Blizzard: Sustained winds or frequent gusts of 35 mph or more with falling or blowing snow that cuts visibility below a quarter mile for three hours or longer.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

Every storm in South Dakota in 2019 Every state in 2019 This day in weather history Warnings in South Dakota, April 2019

Sources

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 2026-10-01. Each event’s entry at NCEI: 840921, 840926, 840918, 841067, 841075, 841077, 840832, 840852, 840884, 840847, 840853, 840854, 840885, 840892, 840894, 840857, 840876, 840881, 840886, 840887, 840898, 840900, 841054, 840889.