Severe Thunderstorm Warning 87, NWS Sioux Falls, SD

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Hazardous Weather Outlook
National Weather Service Sioux Falls SD
528 PM CDT Thu Jun 19 2025

IAZ012-020>022-031-032-NEZ013-014-SDZ038-039-050-052>055-057>071-
202230-
Sioux-Plymouth-Cherokee-Buena Vista-Woodbury-Ida-Dixon-Dakota-
Beadle-Kingsbury-Gregory-Jerauld-Sanborn-Miner-Lake-Brule-Aurora-
Davison-Hanson-McCook-Minnehaha-Charles Mix-Douglas-Hutchinson-
Turner-Lincoln-Bon Homme-Yankton-Clay-Union-
528 PM CDT Thu Jun 19 2025

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

.DAY ONE...Tonight

Isolated thunderstorms may develop over south central South Dakota
and drift towards the James River valley by mid-evening. There is
a remote risk that a storm could reach I-29 before dissipating.
If a storm is able to form, ping pong ball size hail and downburst
winds of 60 to 70 mph could be possible.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

By the end of this week, heat and humidity building into the area
will likely produce heat indices above 100 degrees Friday through
Sunday. Those with outdoor activities planned, or with limited
cooling resources, will want to monitor the forecast and prepare
for extreme heat.

Heavy rainfall could return to the area next week. Details are
uncertain at this time so continue to check the latest forecast for
the most up to date information.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

IAZ001>003-013-014-MNZ071-072-080-081-089-090-097-098-SDZ040-056-
202230-
Lyon-Osceola-Dickinson-O'Brien-Clay-Lincoln-Murray-Cottonwood-
Nobles-Jackson-Pipestone-Rock-Brookings-Moody-
528 PM CDT Thu Jun 19 2025

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

.DAY ONE...Tonight

Isolated to scattered thunderstorms may begin to develop by late
evening and continue to move northeast into southwest Minnesota
and northwest Iowa after dark. Thunderstorms will be capable of
producing golf ball size hail and brief strong wind gusts.
Thunderstorm risks dissipate after 2am.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

By the end of this week, heat and humidity building into the area
will likely produce heat indices above 100 degrees Friday through
Sunday. Those with outdoor activities planned, or with limited
cooling resources, will want to monitor the forecast and prepare
for extreme heat.

Heavy rainfall could return to the area next week. Details are
uncertain at this time so continue to check the latest forecast for
the most up to date information.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.