Extreme rain in United States, 26 September to 1 October 2021
Extreme rain in United States, 26 September to 1 October 2021: 101 records at 98 stations, peak on 28 September 2021. Closed.
Data as of . Last revised (2026-10-17).
Key Facts
- Extreme rain in United States, 26 September to 1 October 2021 set or tied 101 station records at 98 stations.
- It ran from 26 September 2021 to 1 October 2021 (6 days) and its peak day was 28 September 2021.
- Status: closed.
- Everett set a daily record precipitation of 26.9 mm (1.1 in) on 1 October 2021.
- The busiest day was 28 September 2021 with 46 records.
- The oldest broken record in the ranked list had stood for 123 years.
Footprint
26 September to 1 October 2021| Station | Type | Value | Date |
|---|---|---|---|
| Everett | Record daily precipitation | 26.9 mm (1.1 in) | 2021-10-01 |
| Elma | Record daily precipitation | 58.4 mm (2.3 in) | 2021-09-27 |
| Detroit Dam | Record daily precipitation | 39.4 mm (1.6 in) | 2021-09-28 |
| Jump Off Joe | Record daily precipitation | 40.6 mm (1.6 in) | 2021-09-27 |
| Railroad Overpass | Record daily precipitation | 30.5 mm (1.2 in) | 2021-09-27 |
| Lemolo Lake 3 NNW | Record daily precipitation | 35.3 mm (1.4 in) | 2021-09-28 |
| Stahl Peak | Record daily precipitation | 30.5 mm (1.2 in) | 2021-09-28 |
| Troutdale | Record daily precipitation | 25.1 mm (1.0 in) | 2021-09-28 |
| Lookout Pt Dam | Record daily precipitation | 25.7 mm (1.0 in) | 2021-09-28 |
| Honeyman Sp | Record daily precipitation | 30.5 mm (1.2 in) | 2021-09-27 |
| Leaburg 1 SW | Record daily precipitation | 44.5 mm (1.8 in) | 2021-09-28 |
| Chimacum 4 S | Record daily precipitation | 19.1 mm (0.8 in) | 2021-09-26 |
| Adin Mtn | Record daily precipitation | 17.8 mm (0.7 in) | 2021-09-27 |
| Taylor Butte | Record daily precipitation | 12.7 mm (0.5 in) | 2021-09-27 |
| Fish Lk. | Record daily precipitation | 22.9 mm (0.9 in) | 2021-09-27 |
| Bowman Dam | Record daily precipitation | 16.3 mm (0.6 in) | 2021-09-28 |
| Cambridge | Record daily precipitation | 13.2 mm (0.5 in) | 2021-09-28 |
| John Day | Record daily precipitation | 21.1 mm (0.8 in) | 2021-09-28 |
| Boundary Dam | Record daily precipitation | 16.8 mm (0.7 in) | 2021-09-28 |
| Rosalia | Record daily precipitation | 17.3 mm (0.7 in) | 2021-09-28 |
Records per Day
Peak day 46| Date | Records |
|---|---|
| 2021-09-26 | 5 |
| 2021-09-27 | 44 |
| 2021-09-28 | 46 |
| 2021-09-29 | 4 |
| 2021-09-30 | 1 |
| 2021-10-01 | 1 |
Top Records by Margin
Margin over the record replaced| Jump Off Joe, 09-27 | |
|---|---|
| Railroad Overpass, 09-27 | |
| Lemolo Lake 3 NNW, 09-28 | |
| Stahl Peak, 09-28 | |
| Fish Lk., 09-27 | |
| Elma, 09-27 | |
| Leaburg 1 SW, 09-28 | |
| Honeyman Sp, 09-27 | |
| Adin Mtn, 09-27 | |
| Detroit Dam, 09-28 | |
| Everett, 10-01 | |
| John Day, 09-28 | |
| Bowman Dam, 09-28 | |
| Boundary Dam, 09-28 | |
| Lookout Pt Dam, 09-28 |
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 |
|---|---|
| 7 | 123 |
| 10 | 40 |
| 11 | 56 |
| 17 | 40 |
| 2 | 80 |
| 14 | 66 |
| 2 | 80 |
| 18 | 35 |
| 20 | 40 |
| 20 | 26 |
| 15 | 31 |
| 20 | 26 |
| 18 | 40 |
| 5 | 59 |
| 8 | 35 |
| 9 | 44 |
| 8 | 44 |
| 16 | 26 |
| 8 | 39 |
| 16 | 8 |
| 3 | 59 |
| 18 | 26 |
| 20 | 26 |
| 20 | 26 |
| 20 | 8 |
| 15 | 28 |
| 2 | 59 |
| 31 | 8 |
| 18 | 26 |
| 1 | 59 |
| 4 | 44 |
| 2 | 50 |
| 7 | 40 |
| 2 | 44 |
| 5 | 44 |
| 5 | 8 |
| 14 | 8 |
| 1 | 59 |
| 4 | 50 |
| 13 | 35 |
| 8 | 39 |
| 5 | 26 |
| 4 | 26 |
| 7 | 16 |
| 7 | 10 |
| 5 | 39 |
| 5 | 35 |
| 5 | 40 |
| 15 | 26 |
| 8 | 35 |
| 5 | 31 |
| 3 | 40 |
| 8 | 32 |
| 13 | 7 |
| 1 | 44 |
| 4 | 7 |
| 6 | 40 |
| 5 | 35 |
| 10 | 26 |
| 5 | 35 |
| 3 | 40 |
| 2 | 40 |
| 7 | 26 |
| 5 | 31 |
| 8 | 23 |
| 8 | 26 |
| 9 | 10 |
| 7 | 10 |
| 2 | 27 |
| 5 | 8 |
| 10 | 24 |
| 13 | 10 |
| 10 | 8 |
| 9 | 8 |
| 5 | 26 |
| 3 | 26 |
| 3 | 24 |
| 3 | 26 |
| 8 | 26 |
| 3 | 24 |
| 1 | 23 |
| 1 | 24 |
| 0 | 32 |
| 1 | 23 |
| 3 | 20 |
| 1 | 27 |
| 7 | 10 |
| 2 | 8 |
| 8 | 8 |
| 8 | 8 |
| 1 | 8 |
| 3 | 8 |
| 5 | 8 |
| 3 | 8 |
| 3 | 10 |
| 2 | 10 |
| 3 | 10 |
| 3 | 2 |
| 0 | 2 |
| 3 | 8 |
| 3 | 2 |
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, 26 September to 1 October 2021 (this event) |
Every Record Set
20 of 101| Date | Station | Record | Value | Margin | Years stood | Significance |
|---|---|---|---|---|---|---|
| 2021-09-26 | Chimacum 4 S | Record daily precipitation | 19.1 mm (0.8 in) | 1.8 mm (0.07 in) | 80 | 20 of 100 (Routine) |
| 2021-09-27 | Elma | Record daily precipitation | 58.4 mm (2.3 in) | 17.0 mm (0.7 in) | 40 | 39 of 100 (Notable) |
| 2021-09-27 | Jump Off Joe | Record daily precipitation | 40.6 mm (1.6 in) | 20.3 mm (0.8 in) | 40 | 33 of 100 (Routine) |
| 2021-09-27 | Railroad Overpass | Record daily precipitation | 30.5 mm (1.2 in) | 20.3 mm (0.8 in) | 26 | 33 of 100 (Routine) |
| 2021-09-27 | Honeyman Sp | Record daily precipitation | 30.5 mm (1.2 in) | 15.8 mm (0.6 in) | 26 | 28 of 100 (Routine) |
| 2021-09-27 | Adin Mtn | Record daily precipitation | 17.8 mm (0.7 in) | 15.3 mm (0.6 in) | 31 | 20 of 100 (Routine) |
| 2021-09-27 | Taylor Butte | Record daily precipitation | 12.7 mm (0.5 in) | 7.6 mm (0.30 in) | 39 | 20 of 100 (Routine) |
| 2021-09-27 | Fish Lk. | Record daily precipitation | 22.9 mm (0.9 in) | 17.8 mm (0.7 in) | 35 | 20 of 100 (Routine) |
| 2021-09-28 | Detroit Dam | Record daily precipitation | 39.4 mm (1.6 in) | 13.5 mm (0.5 in) | 66 | 36 of 100 (Notable) |
| 2021-09-28 | Lemolo Lake 3 NNW | Record daily precipitation | 35.3 mm (1.4 in) | 20.1 mm (0.8 in) | 26 | 31 of 100 (Routine) |
| 2021-09-28 | Stahl Peak | Record daily precipitation | 30.5 mm (1.2 in) | 17.8 mm (0.7 in) | 40 | 31 of 100 (Routine) |
| 2021-09-28 | Troutdale | Record daily precipitation | 25.1 mm (1.0 in) | 5.0 mm (0.20 in) | 59 | 30 of 100 (Routine) |
| 2021-09-28 | Lookout Pt Dam | Record daily precipitation | 25.7 mm (1.0 in) | 7.7 mm (0.30 in) | 44 | 29 of 100 (Routine) |
| 2021-09-28 | Leaburg 1 SW | Record daily precipitation | 44.5 mm (1.8 in) | 16.3 mm (0.6 in) | 8 | 27 of 100 (Routine) |
| 2021-09-28 | Bowman Dam | Record daily precipitation | 16.3 mm (0.6 in) | 8.7 mm (0.34 in) | 44 | 20 of 100 (Routine) |
| 2021-09-28 | Cambridge | Record daily precipitation | 13.2 mm (0.5 in) | 1.8 mm (0.07 in) | 80 | 20 of 100 (Routine) |
| 2021-09-28 | John Day | Record daily precipitation | 21.1 mm (0.8 in) | 9.7 mm (0.38 in) | 40 | 20 of 100 (Routine) |
| 2021-09-28 | Boundary Dam | Record daily precipitation | 16.8 mm (0.7 in) | 8.4 mm (0.33 in) | 35 | 20 of 100 (Routine) |
| 2021-09-28 | Rosalia | Record daily precipitation | 17.3 mm (0.7 in) | 6.9 mm (0.27 in) | 123 | 20 of 100 (Routine) |
| 2021-10-01 | Everett | Record daily precipitation | 26.9 mm (1.1 in) | 11.2 mm (0.4 in) | 56 | 43 of 100 (Notable) |
The daily ledgers keep a limited number of records per day, so this list has 20 of the 101 records the event counts. The counts above use the full total.
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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.