Severe Thunderstorm Warning
Severe Weather Statement
National Weather Service Rapid City SD
121 PM MDT Mon Aug 17 2026
SDC063-105-172015-
/O.CON.KUNR.SV.W.0293.000000T0000Z-260817T2015Z/
Harding SD-Perkins SD-
121 PM MDT Mon Aug 17 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM MDT FOR
NORTHEASTERN HARDING AND NORTHWESTERN PERKINS COUNTIES...
At 121 PM MDT, a severe thunderstorm was located over Ralph, or 27
miles northeast of Buffalo, moving southeast at 30 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Ralph and Prairie City.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Anyone outdoors should move to shelter inside a well-built structure
and stay away from windows. This storm is capable of producing
dangerous hail and damaging winds.
&&
LAT...LON 4578 10323 4583 10321 4587 10310 4574 10246
4549 10276
TIME...MOT...LOC 1915Z 300DEG 24KT 4581 10312
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
SE
Severe Weather Statement
Severe Weather Statement
National Weather Service Rapid City SD
121 PM MDT Mon Aug 17 2026
SDC063-105-172015-
/O.CON.KUNR.SV.W.0293.000000T0000Z-260817T2015Z/
Harding SD-Perkins SD-
121 PM MDT Mon Aug 17 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM MDT FOR
NORTHEASTERN HARDING AND NORTHWESTERN PERKINS COUNTIES...
At 121 PM MDT, a severe thunderstorm was located over Ralph, or 27
miles northeast of Buffalo, moving southeast at 30 mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Ralph and Prairie City.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Anyone outdoors should move to shelter inside a well-built structure
and stay away from windows. This storm is capable of producing
dangerous hail and damaging winds.
&&
LAT...LON 4578 10323 4583 10321 4587 10310 4574 10246
4549 10276
TIME...MOT...LOC 1915Z 300DEG 24KT 4581 10312
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
SE
Special Weather Statement
Special Weather Statement
National Weather Service Bismarck ND
228 PM CDT Mon Aug 17 2026
NDZ040-041-043-044-172000-
Bowman ND-Adams ND-Slope ND-Hettinger ND-
128 PM MDT Mon Aug 17 2026
...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN ADAMS...EASTERN
BOWMAN...SOUTHEASTERN SLOPE AND SOUTHWESTERN HETTINGER COUNTIES UNTIL
2 PM MDT...
At 128 PM MDT, Doppler radar was tracking a strong thunderstorm 9
miles north of Reeder, or 21 miles northwest of Hettinger, moving
east at 30 mph.
HAZARD...Wind gusts up to 40 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Mainly rural areas of Northwestern Adams, Eastern Bowman,
Southeastern Slope and Southwestern Hettinger Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
&&
LAT...LON 4628 10301 4630 10301 4641 10260 4615 10258
4616 10301
TIME...MOT...LOC 1928Z 264DEG 24KT 4623 10293
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH
$$
Johnson
Special Weather Statement
National Weather Service Rapid City SD
103 PM MDT Mon Aug 17 2026
SDZ001-171930-
Harding SD-
103 PM MDT Mon Aug 17 2026
...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN HARDING COUNTY
UNTIL 130 PM MDT...
At 103 PM MDT, Doppler radar was tracking a strong thunderstorm 7
miles east of Ludlow, or 24 miles northeast of Buffalo, moving
southeast at 25 mph.
HAZARD...Wind gusts of 50 to 55 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Ralph.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
&&
LAT...LON 4584 10337 4594 10329 4590 10297 4567 10312
TIME...MOT...LOC 1903Z 296DEG 21KT 4585 10323
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 TO 55 MPH
$$
SE
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Bismarck ND
211 PM CDT Mon Aug 17 2026
NDZ040-041-043-044-046-048-050-051-061-062-181915-
Slope-Hettinger-Bowman-Adams-Emmons-La Moure-McIntosh-Dickey-
Western Sioux-Eastern Sioux-
211 PM CDT Mon Aug 17 2026 /111 PM MDT Mon Aug 17 2026/
This Hazardous Weather Outlook is for portions of south central
North Dakota, southeast North Dakota, and southwest North Dakota.
.DAY ONE...This Afternoon and Tonight
Isolated severe thunderstorms are possible across far southern
North Dakota this afternoon and early evening. The main hazards
will be large hail up to quarter size and damaging wind gusts up
to 60 mph.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday
The probability for widespread hazardous weather is low.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
NJH
Hazardous Weather Outlook
National Weather Service Bismarck ND
211 PM CDT Mon Aug 17 2026
NDZ001>005-009-010-012-013-017>020-022-023-025-031>033-035>037-
042-047-055>060-181915-
Divide-Burke-Renville-Bottineau-Rolette-Williams-Mountrail-
McHenry-Pierce-McKenzie-Dunn-Mercer-Oliver-Sheridan-Wells-Foster-
Golden Valley-Billings-Stark-Burleigh-Kidder-Stutsman-Grant-Logan-
Northwest Ward-Central and Southern Ward/Minot Area-
Western McLean-Eastern McLean-Western Morton-Eastern Morton-
211 PM CDT Mon Aug 17 2026 /111 PM MDT Mon Aug 17 2026/
This Hazardous Weather Outlook is for portions of north central
North Dakota, northwest North Dakota, south central North Dakota,
southeast North Dakota, and southwest North Dakota.
.DAY ONE...This Afternoon and Tonight
Scattered showers and isolated thunderstorms are possible today
into this evening. Severe weather is not expected.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday
The probability for widespread hazardous weather is low.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
Hazardous Weather Outlook
National Weather Service Aberdeen SD
107 PM CDT Mon Aug 17 2026
SDZ003>006-009-010-015>017-033>035-181815-
Corson-Campbell-McPherson-Brown-Walworth-Edmunds-Dewey-Potter-Faulk-
Stanley-Sully-Hughes-
107 PM CDT Mon Aug 17 2026 /1207 PM MDT Mon Aug 17 2026/
This Hazardous Weather Outlook is for central South Dakota, north
central South Dakota and northeast South Dakota.
.DAY ONE...This afternoon and tonight.
There is a Marginal Risk (level 1 of 5) for isolated to scattered
severe storms. The severe weather threat will run from late this
afternoon, through the evening, and into the overnight hours. Main
threats are large hail, 1" in diameter, and wind gusts around 60
mph.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
No hazardous weather is expected at this time.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected at this time.
$$
Hazardous Weather Outlook
National Weather Service Aberdeen SD
107 PM CDT Mon Aug 17 2026
MNZ039-046-SDZ007-008-011-018>023-036-037-045-048-051-181815-
Traverse-Big Stone-Marshall-Roberts-Day-Spink-Clark-Codington-Grant-
Hamlin-Deuel-Hyde-Hand-Jones-Lyman-Buffalo-
107 PM CDT Mon Aug 17 2026
This Hazardous Weather Outlook is for west central Minnesota,
central South Dakota and northeast South Dakota.
.DAY ONE...This afternoon and tonight.
There is a Slight Risk (level 2 of 5) for isolated to scattered
severe storms this afternoon and evening. Main threats are large
hail, 1 to 2" in diameter, and wind gusts of 60 to 70 mph. A tornado
or two is possible east of a line from Murdo to Redfield to Sisseton.
Brief heavy rainfall is also possible with any thunderstorm.
Additional thunderstorm activity is possible late tonight into the
morning hours Tuesday. There is a lower risk of severe weather
during this period, however we can`t rule out hail to 1" and wind
gusts around 60 mph.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
There is a Marginal Risk (level 1 out 5) for an isolated severe
storm along and south of a line from Pierre to Watertown during the
morning Tuesday. Main threats include 1 inch diameter hail and wind
gusts around 60 mph.
.SPOTTER INFORMATION STATEMENT...
Spotter activation may be requested. Weather spotters are encouraged
to submit reports to the National Weather Service in Aberdeen. The
public can submit reports on our web page, Facebook page, or our X
feed.
$$
07
Hazardous Weather Outlook
National Weather Service North Platte NE
1233 PM CDT Mon Aug 17 2026
NEZ004>010-022>029-035>038-056>059-069>071-094-181745-
Sheridan-Eastern Cherry-Keya Paha-Boyd-Brown-Rock-Holt-Garden-Grant-
Hooker-Thomas-Blaine-Loup-Garfield-Wheeler-Arthur-McPherson-Logan-
Custer-Deuel-Keith-Perkins-Lincoln-Chase-Hayes-Frontier-
Western Cherry-
1233 PM CDT Mon Aug 17 2026 /1133 AM MDT Mon Aug 17 2026/
This Hazardous Weather Outlook is for portions of western and north
central Nebraska.
.DAY ONE...This afternoon and tonight.
Scattered thunderstorms are possible across the area this evening
and tonight. A few storms could be strong to severe, especially east
of Highway 61. Damaging winds, large hail, and locally heavy
rainfall look to be the primary threats.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
Thunderstorms chances continue into midweek across western and north
central Nebraska. Locally heavy rainfall will remain a possibility
each day. Storms could also be strong to severe through Wednesday as
well, with large hail and damaging winds as the primary threats.
.SPOTTER INFORMATION STATEMENT...
Spotter activation may be needed.
$$
Taylor
Hazardous Weather Outlook
National Weather Service Sioux Falls SD
344 AM CDT Mon Aug 17 2026
IAZ001>003-012>014-020>022-031-032-MNZ071-072-080-081-089-090-097-
098-NEZ013-014-SDZ038>040-050-052>071-180845-
Lyon-Osceola-Dickinson-Sioux-O`Brien-Clay-Plymouth-Cherokee-
Buena Vista-Woodbury-Ida-Lincoln-Murray-Cottonwood-Nobles-Jackson-
Pipestone-Rock-Dixon-Dakota-Beadle-Kingsbury-Brookings-Gregory-
Jerauld-Sanborn-Miner-Lake-Moody-Brule-Aurora-Davison-Hanson-McCook-
Minnehaha-Charles Mix-Douglas-Hutchinson-Turner-Bon Homme-Yankton-
Union-
344 AM CDT Mon Aug 17 2026
This Hazardous Weather Outlook is for northwest Iowa, west central
Iowa, southwest Minnesota, northeast Nebraska, central South
Dakota, east central South Dakota, south central South Dakota and
southeast South Dakota.
.DAY ONE...Today and tonight.
Isolated to scattered thunderstorms which develop after 4 pm may
become strong to severe. Stronger storms through midnight could
produce two inch hail and wind gusts to 65 mph. A tornado cannot be
ruled out.
.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
Scattered thunderstorm risks continue through Wednesday. Severe
storm risks remain focused mostly Tuesday afternoon and early evening
along and south of I-90.
.SPOTTER INFORMATION STATEMENT...
Spotter activation may be needed after 4 pm Monday through the
evening.
$$
