Enter any address in Sweet Grass County, Montana to see its FEMA flood zone
2 NOAA storm reports from this county describe what happened, in the words of the meteorologists who were there.
Sweet Grass County, Montana has recorded 11 flood-related events since 1996 according to NOAA's Storm Events Database, including 5 flash floods and 6 river or area floods. The county has received 9 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 (1997–2022)
Source: OpenFEMA Disaster Declarations Summaries.
| Declaration | Type | Date |
|---|---|---|
| Severe Storm And Flooding | Flood | Jun 10, 2022 |
| Covid-19 | Biological | Jan 20, 2020 |
| Covid-19 Pandemic | Biological | Jan 20, 2020 |
| Severe Storms And Flooding | Severe Storm | Apr 4, 2011 |
| Derby Fire | Fire | Aug 30, 2006 |
| Hurricane Katrina Evacuation | Hurricane | Aug 29, 2005 |
| Hobble Fire-08/07/2003 | Fire | Aug 10, 2003 |
| Wildfires | Fire | Jul 13, 2000 |
| Severe Storms,ice Jams, Snow Melt, Flooding | Severe Storm | Mar 1, 1997 |
NOAA Storm Events Database (1996–2025)
Source: NOAA National Weather Service Storm Events Database.
| Type | Date | Damage |
|---|---|---|
| Flash Flood | Jun 7, 2023 | 0.00K |
| Flash Flood | Jun 6, 2023 | 0.00K |
| Flood | Jul 3, 2022 | 0.00K |
| Flood | Mar 9, 2014 | 0.00K |
| Flood | Mar 6, 2014 | 0.00K |
| Flash Flood | Jun 29, 2013 | 0.00K |
| Flood | May 20, 2011 | 4.00M |
| Flood | May 11, 2005 | — |
| Flash Flood | Jun 30, 2004 | — |
| Flash Flood | Jun 5, 1997 | — |
Flash Flood — Jun 7, 2023
A thunderstorm 8 to 10 miles north/northwest of Reed Point produced heavy rainfall resulting in flash flooding that affected West White Beaver Creek. The flash flood created some log jams and took out some fencing.
Flash Flood — Jun 6, 2023
A very moist, easterly surface flow advected 50 to 60 degree dewpoints from the central plains into the Billings Forecast Area. In addition, atmospheric precipitable waters were well over 1.00. Steering winds were light resulting in slow-moving thunderstorms. Although some large hail occurred with a few thunderstorms, the main impact was heavy rain and flash flooding.
Flood — Jul 3, 2022
An unstable southwest flow aloft, combined with a strong jet stream aloft and a moist low-level easterly flow, resulted in numerous severe thunderstorms across the Billings Forecast Area. These thunderstorms contained large hail and very heavy rain.
Flood — Mar 9, 2014
After a very cold winter resulting in area rivers, streams and creeks freezing, early March began with some heavy snow followed by a rapid warm-up. This warm-up resulted in snowmelt and ice-jam flooding over area rivers, creeks and streams that continued into the middle of the month. While many areas experienced flooding, the locations that were most impacted by flooding included Park County, a...
Flood — Mar 6, 2014
After a very cold winter resulting in area rivers, streams and creeks freezing, early March began with some heavy snow followed by a rapid warm-up. This warm-up resulted in snowmelt and ice-jam flooding over area rivers, creeks and streams that continued into the middle of the month. While many areas experienced flooding, the locations that were most impacted by flooding included Park County, a...
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 Sweet Grass County, Montana:
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 Sweet Grass County, Montana 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.