Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Sioux Falls SD
435 AM CDT Mon Jun 29 2026

IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097-
098-NEZ013-014-SDZ040-056-062-066-067-069>071-300945-
Lyon-Osceola-Dickinson-Sioux-O`Brien-Clay-Plymouth-Cherokee-
Buena Vista-Woodbury-Ida-Lincoln-Murray-Cottonwood-Nobles-Jackson-
Pipestone-Rock-Dixon-Dakota-Brookings-Moody-Minnehaha-Turner-Yankton-
Union-
435 AM CDT Mon Jun 29 2026

This Hazardous Weather Outlook is for northwest Iowa, west central
Iowa, southwest Minnesota, northeast Nebraska, east central South
Dakota and southeast South Dakota.

.DAY ONE...Today and tonight.

Heat indices will climb into the triple digits this afternoon to
early evening, with readings as high as 105 to 108 degrees from
around Sioux City toward Spencer and Storm Lake in northwest Iowa.
Take precautions to limit your risk of heat illness if spending time
outdoors.

Scattered strong to severe thunderstorms may develop evening. If
storms are able to develop, the main threats with the strongest
storms will be hail up to golf ball size and damaging wind gusts up
to 75 mph, but a tornado or two and locally heavy rainfall are also
possible. There is an additional low risk for an isolated strong to
severe storm late tonight into early Tuesday morning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Isolated severe storms are possible again Tuesday night, and perhaps
again on Wednesday, but confidence in any details is low at this
time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed after 5 pm this afternoon.

$$

URGENT - WEATHER MESSAGE
National Weather Service Sioux Falls SD
738 AM CDT Mon Jun 29 2026

MNZ071-072-080-081-089-090-097-098-SDZ040-056-292300-
/O.CON.KFSD.HT.Y.0002.260629T1800Z-260630T0200Z/
Lincoln-Lyon-Murray-Cottonwood-Nobles-Jackson-Pipestone-Rock-
Brookings-Moody-
Including the cities of Jackson, Brookings, Hendricks, Slayton,
Worthington, Flandreau, Mountain Lake, Ivanhoe, Lake Benton,
Lakefield, Pipestone, Marshall, Fulda, Luverne, Windom, and Tyler
738 AM CDT Mon Jun 29 2026

...HEAT ADVISORY REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO 9 PM
CDT THIS EVENING...

* WHAT...Heat index values up to 104 expected.

* WHERE...Portions of southwest Minnesota and east central South
  Dakota.

* WHEN...From 1 PM this afternoon to 9 PM CDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat
  illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.

&&

$$

Weisser

Hazard Report Provided By forecast.weather.gov