Extreme rain in United States, 1 to 2 September 2026
Extreme rain in United States, 1 to 2 September 2026: 7 records at 7 stations, peak on 2 September 2026. Closed.
Data as of . Last revised (2026-10-17).
Key Facts
- Extreme rain in United States, 1 to 2 September 2026 set or tied 7 station records at 7 stations.
- It ran from 1 September 2026 to 2 September 2026 (2 days) and its peak day was 2 September 2026.
- Status: closed.
- Trempealeau Dam 6 set a daily record precipitation of 70.6 mm (2.8 in) on 2 September 2026 (provisional).
- The busiest day was 2 September 2026 with 6 records.
- The oldest broken record in the ranked list had stood for 67 years.
Footprint
1 to 2 September 2026| Station | Type | Value | Date |
|---|---|---|---|
| Trempealeau Dam 6 | Record daily precipitation | 70.6 mm (2.8 in) | 2026-09-02 |
| Le Mars | Record daily precipitation | 50.8 mm (2.0 in) | 2026-09-02 |
| Winnebago | Record daily precipitation | 41.9 mm (1.6 in) | 2026-09-02 |
| Worthington 2 NNE | Record daily precipitation | 26.2 mm (1.0 in) | 2026-09-02 |
| Hokah Wwtp | Record daily precipitation | 15.0 mm (0.6 in) | 2026-09-02 |
| Pierce | Record daily precipitation | 21.6 mm (0.9 in) | 2026-09-02 |
| Yankton 2 E | Record daily precipitation | 14.5 mm (0.6 in) | 2026-09-01 |
Records per Day
Peak day 6| Date | Records |
|---|---|
| 2026-09-01 | 1 |
| 2026-09-02 | 6 |
Top Records by Margin
Margin over the record replaced| Trempealeau Dam 6, 09-02 | |
|---|---|
| Le Mars, 09-02 | |
| Hokah Wwtp, 09-02 | |
| Pierce, 09-02 | |
| Worthington 2 NNE, 09-02 | |
| Winnebago, 09-02 | |
| Yankton 2 E, 09-01 |
Margin is how far the new value is beyond the record it replaced. Ties are not shown.
Margin Against Age of the Broken Record
| Margin (mm) | Years the old record stood |
|---|---|
| 43 | 67 |
| 17 | 33 |
| 5 | 60 |
| 6 | 40 |
| 9 | 24 |
| 7 | 16 |
| 2 | 7 |
Compared With Other Events
Station records per event| Extreme rain in United States and Mexico, 23 February to 15 March 2019 | |
|---|---|
| Extreme rain in United States, 3 to 19 January 2024 | |
| Extreme rain in Australia, 7 to 26 March 2021 | |
| Extreme rain in United States and Mexico, 29 September to 19 October 2018 | |
| Extreme rain in United States, 19 December 2022 to 13 January 2023 | |
| Extreme rain in United States, 1 to 2 September 2026 (this event) |
Every Record Set
7 of 7| Date | Station | Record | Value | Margin | Years stood | Significance |
|---|---|---|---|---|---|---|
| 2026-09-01 | Yankton 2 E | Record daily precipitation (provisional) | 14.5 mm (0.6 in) | 1.5 mm (0.06 in) | 7 | 10 of 100 (Routine) |
| 2026-09-02 | Trempealeau Dam 6 | Record daily precipitation (provisional) | 70.6 mm (2.8 in) | 43.4 mm (1.7 in) | 67 | 58 of 100 (Notable) |
| 2026-09-02 | Le Mars | Record daily precipitation (provisional) | 50.8 mm (2.0 in) | 17.0 mm (0.7 in) | 33 | 31 of 100 (Routine) |
| 2026-09-02 | Winnebago | Record daily precipitation (provisional) | 41.9 mm (1.6 in) | 4.6 mm (0.18 in) | 60 | 30 of 100 (Routine) |
| 2026-09-02 | Worthington 2 NNE | Record daily precipitation (provisional) | 26.2 mm (1.0 in) | 5.9 mm (0.23 in) | 40 | 21 of 100 (Routine) |
| 2026-09-02 | Hokah Wwtp | Record daily precipitation (provisional) | 15.0 mm (0.6 in) | 8.9 mm (0.35 in) | 24 | 19 of 100 (Routine) |
| 2026-09-02 | Pierce | Record daily precipitation (provisional) | 21.6 mm (0.9 in) | 7.1 mm (0.28 in) | 16 | 16 of 100 (Routine) |
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Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17. Events are found by this site from station records and are not official designations. Records are provisional until reprocessed.