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Home Return to list Severe Thunderstorm Warning 0275 Issued by the Rapid City Forecast Office
Action: New Issued At: 2026-08-12 00:18:06
472
WUUS53 KUNR 120517
SVRUNR
SDC095-121-123-120615-
/O.NEW.KUNR.SV.W.0275.260812T0517Z-260812T0615Z/
BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Rapid City SD
1217 AM CDT Wed Aug 12 2026
The National Weather Service in Rapid City has issued a
* Severe Thunderstorm Warning for...
Southeastern Mellette County in south central South Dakota...
Todd County in south central South Dakota...
Tripp County in south central South Dakota...
* Until 115 AM CDT.
* At 1217 AM CDT, severe thunderstorms were located along a line from
over Mosher to over Lakeview, or along a line from 21 miles
northeast of Mission to 15 miles south of Mission, moving southeast
at 40 mph.
THESE ARE DESTRUCTIVE STORMS FOR OKREEK, WITTEN, WINNER, COLOME.
HAZARD...90 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...You are in a life-threatening situation. Flying debris may
be deadly to those caught without shelter. Mobile homes
will be heavily damaged or destroyed. Homes and businesses
will have substantial roof and window damage. Expect
extensive tree damage and power outages.
* Locations impacted include...
Winner, Mission, Rosebud, Saint Francis, Colome, Okreek, Wood,
Carter, Millboro, Mosher, Keyapaha, Witten, Hidden Timber,
Clearfield, Littleburg, Butte Creek, Antelope, Sicangu Village,
Ideal South Housing and Lakeview.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter now inside an interior room on the lowest floor of a
well-built structure. These storms are capable of producing
widespread destructive winds and large hail.
This is a dangerous situation with winds expected to produce damage
similar to a tornado. Move to an interior room on the lowest floor of
a well-built structure. Mobile homes and high profile vehicles are at
an enhanced risk for damage.
&&
LAT...LON 4313 10105 4367 10049 4337 9953 4328 9953
4300 9969 4300 10076
TIME...MOT...LOC 0517Z 302DEG 36KT 4344 10030 4328 10038 4310 10070
THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...90 MPH
$$
SE
Action: Continued Issued At: 2026-08-12 00:22:37
541
WWUS53 KUNR 120522
SVSUNR
Severe Weather Statement
National Weather Service Rapid City SD
1222 AM CDT Wed Aug 12 2026
SDC095-121-123-120615-
/O.CON.KUNR.SV.W.0275.000000T0000Z-260812T0615Z/
Mellette SD-Todd SD-Tripp SD-
1222 AM CDT Wed Aug 12 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM CDT FOR
SOUTHEASTERN MELLETTE, TODD AND TRIPP COUNTIES...
At 1222 AM CDT, severe thunderstorms were located along a line from
over Carter to 5 miles northwest of Sicangu Village, or along a line
from 20 miles west of Winner to 16 miles south of Mission, moving
southeast at 40 mph.
THESE ARE DESTRUCTIVE STORMS FOR OKREEK, WITTEN, WINNER, COLOME.
HAZARD...100 mph wind gusts and quarter size hail.
SOURCE...Automated observations.
IMPACT...You are in a life-threatening situation. Flying debris may
be deadly to those caught without shelter. Mobile homes will
be destroyed. Expect considerable damage to homes and
businesses. Expect extensive tree damage and power outages.
Locations impacted include...
Winner, Mission, Rosebud, Saint Francis, Colome, Okreek, Wood,
Carter, Millboro, Mosher, Keyapaha, Witten, Hidden Timber,
Clearfield, Littleburg, Butte Creek, Antelope, Sicangu Village,
Ideal South Housing and Lakeview.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter now inside an interior room on the lowest floor of a
well-built structure. These storms have produced widespread
destructive winds and are capable of producing large hail.
This is a dangerous situation with winds expected to produce damage
similar to a tornado. Move to an interior room on the lowest floor of
a well-built structure. Mobile homes and high profile vehicles are at
an enhanced risk for damage.
This storm has a history of producing damaging winds.
&&
LAT...LON 4313 10105 4367 10049 4337 9953 4328 9953
4300 9969 4300 10076
TIME...MOT...LOC 0517Z 302DEG 36KT 4344 10029 4328 10037 4309 10069
THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...OBSERVED
MAX WIND GUST...100 MPH
$$
SE
Action: Continued Issued At: 2026-08-12 00:47:37
222
WWUS53 KUNR 120547
SVSUNR
Severe Weather Statement
National Weather Service Rapid City SD
1247 AM CDT Wed Aug 12 2026
SDC095-121-123-120615-
/O.CON.KUNR.SV.W.0275.000000T0000Z-260812T0615Z/
Mellette SD-Todd SD-Tripp SD-
1247 AM CDT Wed Aug 12 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 AM CDT FOR
SOUTHEASTERN MELLETTE, EASTERN TODD AND TRIPP COUNTIES...
At 1247 AM CDT, severe thunderstorms were located along a line from 8
miles southwest of Winner to 11 miles southeast of Littleburg, or
along a line from 8 miles southwest of Winner to 32 miles southeast
of Mission, moving southeast at 45 mph.
THESE ARE DESTRUCTIVE STORMS FOR WITTEN, KEYAPAHA, WINNER, COLOME.
HAZARD...80 mph wind gusts and half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be heavily damaged. Expect
considerable damage to roofs, windows, and vehicles.
Extensive tree damage and power outages are likely.
Locations impacted include...
Winner, Colome, Okreek, Carter, Millboro, Keyapaha, Witten,
Clearfield, Ideal South Housing, Hidden Timber, Wewela, Littleburg,
Sicangu Village, Dog Ear Lake and eastern Rosebud Reservation.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter now inside an interior room on the lowest floor of a
well-built structure. These storms are capable of producing
widespread destructive winds and large hail.
This is a dangerous situation with winds expected to produce damage
similar to a tornado. Move to an interior room on the lowest floor of
a well-built structure. Mobile homes and high profile vehicles are at
an enhanced risk for damage.
This storm has a history of producing damaging winds.
&&
LAT...LON 4300 10071 4358 10019 4337 9953 4327 9953
4300 9969
TIME...MOT...LOC 0522Z 304DEG 38KT 4345 10027 4325 10031 4306 10064
THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...80 MPH
$$
SE
Action: Expired Issued At: 2026-08-12 01:13:08
851
WWUS53 KUNR 120612
SVSUNR
Severe Weather Statement
National Weather Service Rapid City SD
112 AM CDT Wed Aug 12 2026
SDC095-121-123-120622-
/O.EXP.KUNR.SV.W.0275.000000T0000Z-260812T0615Z/
Mellette SD-Todd SD-Tripp SD-
112 AM CDT Wed Aug 12 2026
...SEVERE THUNDERSTORM WARNING WILL EXPIRE AT 115 AM CDT FOR
SOUTHEASTERN MELLETTE, EASTERN TODD AND TRIPP COUNTIES...
The Severe Thunderstorm Warning that was previously in effect has
been reissued for Tripp County and is in effect until 130 AM CDT.
Please refer to that bulletin for the latest severe weather
information. However, small hail and gusty winds are still possible
with these thunderstorms.
&&
LAT...LON 4300 10071 4358 10019 4337 9953 4327 9953
4300 9969
TIME...MOT...LOC 0547Z 304DEG 38KT 4330 9996 4310 10001 4291 10033
$$
Helgeson
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