Flood events in Weston County, Wyoming The flood events on record, by date and by year
This page is a county record of past events and claims. It does not show the flood zone or the risk of an address. For the flood map of an address, use FEMA's address search (opens in a new tab).
NCEI has 20 flood events on record for Weston County, Wyoming, from 1996 through 30 Jun 2026.
The newest flood event on record is on 10 Aug 2019.
From 2016 through 2025, NCEI has 5 flood events on record for the county.
The NWS collects event reports from a variety of sources, which include (but are not limited to): county, state, and federal emergency management officials, local law enforcement officials, SKYWARN spotters, NWS damage surveys, newspaper clipping services, the insurance industry, and the general public, among others.
The National Weather Service reports property and crop damage estimates using available data at the time of event reporting. These values should therefore be considered broad estimates. Damage amounts are not adjusted for inflation.
Zone (NWS Forecast Zone): A zone is a geographic area defined by the NWS for issuing forecasts, watches, and warnings. While zones often align with counties, they can also represent smaller or subdivided areas within a county to account for differences in weather conditions, such as elevation or proximity to water. Larger-scale events—such as heat, cold, drought, and winter storms—are typically recorded by zone.
The words of the agency. Source: NOAA NCEI, Storm Events Database, page "Frequently Asked Questions", copied on .
Date of the data: NCEI storm events through . Event types on this page: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.
Newest flood events on record
Flood
2 miles ENE of NEWCASTLE ARPT
Flash Flood
2 miles ENE of NEWCASTLE ARPT. Damage estimate: $25 thousand
Flood
19 miles SSE of NEWCASTLE. Damage estimate: $10 thousand
Flash Flood
11 miles NW of FOUR CORNERS
Flood
10 miles N of OSAGE
Flood
7 miles E of ROCHELLE
Flash Flood
7 miles E of ROCHELLE. Damage estimate: $30 thousand
Flash Flood
4 miles NW of OSAGE
Flash Flood
5 miles N of OSAGE
Flash Flood
10 miles N of OSAGE. Damage estimate: $10 thousand
Flash Flood
2 miles NE of ROCHELLE. Damage estimate: $100 thousand
Flash Flood
8 miles W of FOUR CORNERS. Damage estimate: $25 thousand
Flash Flood
5 miles NNE of OSAGE. Damage estimate: $5 thousand
Flash Flood
2 miles NW of UPTON. Damage estimate: $50 thousand
Flash Flood
6 miles NW of OSAGE. Damage estimate: $163 thousand
Flood
25 miles SSE of NEWCASTLE
Flash Flood
At NEWCASTLE. Damage estimate: $100 thousand
Flood
At UPTON
Flash Flood
At UPTON
Flash Flood
At FOUR CORNERS
A place is the text of the NCEI record: a distance and a direction from a reference place. The site does not show a place text that names a private property or reads as a person. NCEI gives no magnitude for this hazard.
Flood events by year
| Decade | Year that ends in 0 | Year that ends in 1 | Year that ends in 2 | Year that ends in 3 | Year that ends in 4 | Year that ends in 5 | Year that ends in 6 | Year that ends in 7 | Year that ends in 8 | Year that ends in 9 | All |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1950s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1960s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1970s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1980s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1990s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 2 |
| 2000s | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 3 |
| 2010s | 0 | 2 | 1 | 3 | 0 | 4 | 0 | 0 | 1 | 4 | 15 |
| 2020s | 0 | 0 | 0 | 0 | 0 | 0 | 0 (part of the year) | 0 |
A darker cell has a larger count. The number is in each cell.
Flood and flash flood events are on record from 1996. The year 2026 has the events through 30 Jun 2026 only.
By month, all years
- Jan0 events
- Feb0 events
- Mar0 events
- Apr0 events
- May4 events
- Jun7 events
- Jul5 events
- Aug4 events
- Sep0 events
- Oct0 events
- Nov0 events
- Dec0 events
Beside the other counties
| Measure | Weston | All counties of Wyoming | All counties of the United States |
|---|---|---|---|
| Flood events, 1996 to 2026 | 20 | 553 | 177,902 |
| Events for each 100 square miles | 0.8 | 0.6 | 5.0 |
| Events for each 10,000 residents | 29.7 | 9.6 | 5.4 |
The columns for the state and the United States total the counties. They count the events of each county in the same way as the county column. A forecast zone with another name than a county counts for the state only.
Official channels
- NCEI Storm Events Database (opens in a new tab)Search the full NCEI record by state, county and date.
- National Weather Service: Rapid City, SD (opens in a new tab)The forecast office that issues the weather warnings for the county.
- FEMA Flood Map Service Center: Search By Address (opens in a new tab)Search an address to see its flood map. This site has no flood-zone data.
These links open the pages of the agencies. The site checked the links on .
Cite this page
County Hazards. "Flood events on record for Weston County, Wyoming". https://countyhazards.com/county/wy/weston/flood/. Data: NOAA NCEI Storm Events Database through 30 Jun 2026. Page made on .
Questions
- Which month has the most flood events on record for Weston County?
- June has 7 of the 20 flood events on record from 1996 through 30 Jun 2026.
- How many flood events are on record for Wyoming?
- NCEI has 568 flood events on record for Wyoming from 1996 through 30 Jun 2026. That count has every forecast zone of the state.
- How does Weston County compare with the other counties of Wyoming?
- The counties of Wyoming have 0.6 flood events for each 100 square miles. Weston County has 0.8.
- Why are some flood events on record for a forecast zone?
- NCEI records some event types for a National Weather Service forecast zone and not for a county. This page counts a zone event when the zone has the name of the county.