Pilot Index / South Dakota / Aug 18, 2026

Preliminary

Storms in South Dakota on Aug 18, 2026

16 published severe reports across South Dakota on Aug 18, 2026.

Updated Oct 28, 2026.

Coverage is partial. 473 source scopes are pending. Pending data is not a zero report count.

Hail reports: 7. Wind reports: 9. Tornado reports: 0.

The table and map show 16 of 16 reports.

TimeWhatSize or SpeedWhereDetails
Aug 18, 2026, 12:24 AM CDTWind59 mph1 NE Stephan
Record
  • Aug 18, 2026, 12:24 AM CDT. Wind, 59 mph, 1 NE Stephan. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:6c46040004fcb638e67d5e4c0e9c08a7ea8220ff14a78f75fce748133523527b.
Aug 18, 2026, 12:55 AM CDTWind63 mph3 N Gann Valley
Record
  • Aug 18, 2026, 12:55 AM CDT. Wind, 63 mph, 3 N Gann Valley. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:2f8f272aec4d87234f0854b4aff343f8e32ba538ddc74fc8747e698a248b21a5.
Aug 18, 2026, 2:30 AM CDTWind60 mph5 N Iona
Record
  • Aug 18, 2026, 2:30 AM CDT. Wind, 60 mph, 5 N Iona. Source: NWS Local Storm Reports. Status: Preliminary. Record id: lsr:f31ac0c69c00256cc474b6cc4372487b366cd1d93adab2a9b1ed6af2a98a32cb.
Aug 18, 2026, 7:05 PM MDTWind60 mph17 W Castle Rock
Record
  • Aug 18, 2026, 7:05 PM MDT. Wind, 60 mph, 17 W Castle Rock. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:859623d8970e283f38f3b2a73cbbdac6d17374523081e536ab70b2bd4931795a.
Aug 18, 2026, 7:11 PM MDTHail1.25 in1 NNE Brownsville
Record
  • Aug 18, 2026, 7:11 PM MDT. Hail, 1.25 in, 1 NNE Brownsville. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:1e4149d975e66e2401326aacfbf5f7686f7cb075753b98f2f1642a0205e4b401.
Aug 18, 2026, 7:11 PM MDTWind63 mph1 N Buffalo
Record
  • Aug 18, 2026, 7:11 PM MDT. Wind, 63 mph, 1 N Buffalo. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:e55d349bffd321a106f961f56d14e9cc703e020f53babf45a7b6b3b1daadd7dc.
Aug 18, 2026, 7:15 PM MDTWind58 mph12 WSW Castle Rock
Record
  • Aug 18, 2026, 7:15 PM MDT. Wind, 58 mph, 12 WSW Castle Rock. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:fc0e6ca8e896f2ff19672ab74237507445d7578f655a1c99280e52cbccb2124c.
Aug 18, 2026, 7:59 PM MDTHail1.50 in4 WSW Dwtn Rapid City
Record
  • Aug 18, 2026, 7:59 PM MDT. Hail, 1.50 in, 4 WSW Dwtn Rapid City. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:26e38b3c399d2304516e386109c70fb043b28e4af8871e84716bc077da12b29c.
Aug 18, 2026, 8:01 PM MDTHail1.50 in5 SW Dwtn Rapid City
Record
  • Aug 18, 2026, 8:01 PM MDT. Hail, 1.50 in, 5 SW Dwtn Rapid City. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:a3368680eb298d37ab55ba45327fbd58fbe978bf3a176897bd0eedea0375ad00.
Aug 18, 2026, 8:02 PM MDTHail1.00 in4 SSW Dwtn Rapid City
Record
  • Aug 18, 2026, 8:02 PM MDT. Hail, 1.00 in, 4 SSW Dwtn Rapid City. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:f71e362464be4b6deb8f56eae36609078624cbfa1ae6b7aff4f673715ce807ac.
Aug 18, 2026, 8:03 PM MDTHail1.00 in5 NE Rockerville
Record
  • Aug 18, 2026, 8:03 PM MDT. Hail, 1.00 in, 5 NE Rockerville. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:63a6bba9fb1473a6aaf8752baaab34f5f3dc4b3389f6a6f8accb5f003438b9ba.
Aug 18, 2026, 8:06 PM MDTHail1.50 in5 SSW Dwtn Rapid City
Record
  • Aug 18, 2026, 8:06 PM MDT. Hail, 1.50 in, 5 SSW Dwtn Rapid City. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:8c1ee5f697dfd237a2924ee9c345bdd5d662fb305ce10866b1184462eab2437e.
Aug 18, 2026, 8:08 PM MDTHail1.25 in4 S Dwtn Rapid City
Record
  • Aug 18, 2026, 8:08 PM MDT. Hail, 1.25 in, 4 S Dwtn Rapid City. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:cb8f2ff46f2f4f8dc0e3941bd93a6a636faeddd8176a63a6456ff76184530a1a.
Aug 18, 2026, 8:09 PM MDTWind69 mph6 NE Summerset
Record
  • Aug 18, 2026, 8:09 PM MDT. Wind, 69 mph, 6 NE Summerset. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:1e82baa827bfd64c923e2917ef3fc4fbc894b475f37d70705bbf1a6c48864bd4.
Aug 18, 2026, 8:14 PM MDTWind69 mph1 ENE Mud Butte
Record
  • Aug 18, 2026, 8:14 PM MDT. Wind, 69 mph, 1 ENE Mud Butte. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:85c512e948b455e1538672356e64fda7ccfde0da14fb09936da748fdc1c302a9.
Aug 18, 2026, 9:04 PM MDTWind61 mph3 NNW Scenic
Record
  • Aug 18, 2026, 9:04 PM MDT. Wind, 61 mph, 3 NNW Scenic. Source: SPC Preliminary Reports. Status: Preliminary. Record id: spc:609d7f1d0f740f6e79bd37dde426f00fcf2e38cf8aab42d624b73fa89b79bd3c.
How We Count

This page uses published ground reports from 2016-01-01 through 2026-10-29. Coverage is partial. 473 source scopes are pending. Pending data is not a zero report count.

Hail counts at 1.00 in or larger. Wind counts at 58 mph or stronger. State days also include tornado reports.

Reports use the local civil date and clock. City pages use the city clock. State pages use each report location clock.

Exact repeated observations are counted once. Nearby reports with different times, coordinates or sizes remain separate observations.

NCEI rows are verified against NCEI Storm Events. SPC and NWS local reports are preliminary.

Radar signatures and warning polygons are not ground reports and are not in these counts.

A missing report does not show that no storm occurred. These pages show city or state exposure, not damage at an address.

This free page covers the state. It does not check a street address.

Limits

This page is not a certified record.

This page shows weather exposure, not damage or cause.

This page is not an expert opinion and it is not a meteorologist review.

Verify these rows with official NOAA and NWS records.

VectorWX is not affiliated with or endorsed by NOAA or NWS.

Radar-estimated hail size comes from MRMS MESH or NCEI nx3hail. It is an estimate of hail aloft. It is not a measurement of hail on a roof.