44
Recorded events
1
Direct deaths
0
Direct injuries
$15.9M
Property damage
Flood in Fremont County, Wyoming: 44 recorded events between 1998 and 2023. The strongest on record measured 0. That places the county #290 nationally and #1 statewide for this hazard.
Decade by decade
Flood in Fremont County, Wyoming: events per decade
Reporting practice changed over time — early decades are undercounted, not calmer.
The busiest decade for flood in Fremont County is the 2010s, when 33 of the county's 44 recorded events were logged. Comparing decades is useful for spotting active periods, but the earliest years are thin because systematic reporting for this hazard began later.
Within the Fremont County archive, flood makes up 9.7% of all recorded severe weather across 9 hazard types. Nationally the county sits at #290 for this hazard and #1 within Wyoming, putting it in the 90.0 percentile of all U.S. counties.
Seasonality
Events by month
Jun is the peak month for flood in Fremont County with 30 recorded events, while Jan is the quietest. Seasonality here is a property of the archive as much as the climate: reports cluster where population and spotter networks are densest.
Significant events
Deadliest on record
| Date | Location | Scale | Deaths | Injuries | Damage |
|---|---|---|---|---|---|
| Feb 21, 2017 | RIVERTON | 0 | 1 | 0 | $10K |
Most recent
Latest recorded events
| Date | Location | Magnitude | Damage |
|---|---|---|---|
| Jun 22, 2023 | KINNEAR | 0 | $0 |
| Jun 20, 2023 | RIVERTON | 0 | $0 |
| Jun 11, 2022 | RIVERTON | 0 | $0 |
| Jun 11, 2022 | KINNEAR | 0 | $0 |
| Jun 11, 2022 | CROWHEART | 0 | $0 |
| Jun 30, 2020 | RIVERTON | 0 | $0 |
| Jun 29, 2020 | WILLOW CREEK | 0 | $0 |
| Jun 1, 2020 | UNION PASS SUBDVSN | 0 | $0 |
| Jun 7, 2019 | FT WASHAKIE | 0 | $0 |
| Jun 7, 2019 | LANDER | 0 | $0 |
Other hazards here
More from Fremont County
- Thunderstorm Wind 207
- Hail 136
From the record
What the reports say
Written by National Weather Service staff at the time of the event · public domain
Law enforcement reported flooding ditches and sheet flooding north of Riverton on the evening of February 21st. A 33-year old man fell into the flood waters and drowned. A Coroners report noted that the man was under the influence of alcohol, marijuana, amphetamines and anti-depressants.
Abnormally large snowpack melted across the mountains of western and central Wyoming and caused the Wind River to Flood. At the Gauge at Riverton, the river crested above 12 feet, a new record. Along the Riverton Irrigation Canal, the water got high enough to flow directly into the canal, threatening the city of Riverton with flooding. The canal had to be breached to prevent the flooding. As a result, many farmers along the canal were left without irrigation water into July. The repairs to the canal cost around an estimated $2 million dollars. In addition, there was extensive flooding of agricultural land along the Wind River to it's confluence with the Little Wind River.
Chinook winds caused rapid snow melt in the Lander Foothills that brought rapid snow melt. The warm temperatures caused rapid snow melt that rapidly increased river levels. In addition, the frozen Little Popo Agie and Popo Agie rivers broke up rapidly and ice jams caused flooding of the flood prone areas in Lyons Valley. Many homes in the flood prone north and west sides of towns along with surrounding low lying areas were flooded. Many of the side roads in the aforementioned areas of Hudson also saw flooding and minor wash outs.
Quick answers
Frequently asked
How many flood events are on record in Fremont County, Wyoming?
44 flood events are recorded in Fremont County between 1998 and 2023, causing 1 direct deaths.
What is the strongest flood recorded in Fremont County?
The strongest flood on record in Fremont County measured 0.
Where does the flood data for Fremont County come from?
All events come from the NOAA/NCEI Storm Events Database, the federal public-domain archive of severe weather reports. Dates are UTC, damage is as reported and not inflation-adjusted, and the most recent entries may still be revised.
Cite this page
“Flood in Fremont County, Wyoming.” Severe Weather History. severeweatherhistory.com/county/wyoming/fremont-county/flood/ · Data: NOAA/NCEI, FEMA, U.S. Census — public domain.