Enter any address in Campbell County, Wyoming to see its FEMA flood zone
Flash flooding and river overflow are the primary flood concerns in Campbell County, WY. Over the past 30 years, NOAA Storm Events data shows 14 flash flood events and 12 flood events. Recent examples include flooding along the Little Powder River in May 2019 due to rain and melting snow, and a flash flood event in June 2015 that closed Interstate 90 between Gillette and Buffalo after a stationary thunderstorm produced several inches of rain.
NFIP claims data indicates that properties in zones with unknown flood risk have experienced the most claims, with an average payout of $3,027 and an average water depth of -2.4 feet. Properties in Zone X_UNSHADED also saw claims, averaging $1,759 with -1.8 feet of water depth. Homeowners in areas near rivers and those with properties in zones where flood risk is not precisely defined should pay the most attention to flood preparedness.
Summary generated from NOAA storm narratives and NFIP claim data for this county. Not predictive.
4 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Campbell County, Wyoming has recorded 26 flood-related events since 1996 according to NOAA's Storm Events Database, including 14 flash floods and 12 river or area floods. The county has received 6 federal disaster declarations, 1 of which involved flooding or coastal storms. Enter any address above to check its FEMA flood zone designation.
FEMA Disaster Declarations (1978–2024)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Wildfires | Fire | Aug 21, 2024 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Tornado | Tornado | Aug 12, 2005 |
| Methane Gas Seepage | Toxic Substances | Feb 10, 1987 |
| Severe Storms, Flooding & Mudslides | Flood | May 29, 1978 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flood | May 30, 2019 | 0.00K |
| Flash Flood | Aug 8, 2019 | 0.00K |
| Flood | May 27, 2015 | 0.00K |
| Flood | Jun 4, 2015 | 0.00K |
| Flood | Jun 3, 2015 | 1.00K |
| Flash Flood | Jun 3, 2015 | 1.00K |
| Flash Flood | May 24, 2014 | 10.00K |
| Flash Flood | May 26, 2013 | 25.00K |
| Flash Flood | Aug 9, 2013 | 0.00K |
| Flash Flood | Aug 1, 2013 | 150.00K |
Flood — May 30, 2019
Rain and melting snow caused flooding along the Little Powder River in far northwestern Campbell County.
Flash Flood — Aug 8, 2019
Runoff from heavy rain caused flash flooding in two coal mines southeast of Gillette.
Flood — May 27, 2015
Runoff from melting snow in the Bighorn Mountains and heavy rain over the upper Powder River Basin caused significant flooding along the Powder River in northeastern Wyoming.
Flood — Jun 4, 2015
Runoff from around two inches of rain on already saturated soils caused minor flooding in far northwestern Campbell County.
Flood — Jun 3, 2015
A stationary thunderstorm produced several inches of rain in less than two hours along the Johnson-Campbell County line. Officials closed Interstate 90 after water and debris covered the highway between Gillette and Buffalo. Another small thunderstorm produced a brief tornado near Savageton and other severe thunderstorms produced wind gusts around 60 mph.
Source: NOAA National Weather Service Storm Events Database.
Source: OpenFEMA NFIP Individual Claims (2.25M records analyzed).
FEMA assigns flood zone designations to areas in Campbell County, Wyoming:
AE High Risk — 1% annual chance of flooding. Insurance required.
VE Very High Risk — Coastal flooding with wave action.
X (Shaded) Moderate Risk — 500-year floodplain.
X Low Risk — Outside major floodplains.
Properties in Campbell County, Wyoming that are in FEMA-designated Special Flood Hazard Areas (zones A and V) with federally backed mortgages are required to carry flood insurance.
Even outside high-risk zones, flood insurance is recommended. From 2014 to 2024, nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area.
Visit FloodSmart.gov to find an agent and get a quote.