Wyoming and Montana FloodWatch
The USGS monitors flood and high-flow conditions at more than
300 streamgages across Montana and Wyoming. Water level and flow information are used
by the National Weather Service to make accurate flood forecasts. The map to the right
(from USGS's WaterWatch
Web site) show the location of USGS streamgages in Montana and Wyoming currently at
or above flood stage (depicted as a black triangle) or measuring high-flow conditions
(depicted as blue circles).
Hover over any symbol for a summary of currently flow conditions; select the symbol
for more data and other information.
High-flow conditions are expressed as
comparing current (within the past few hours) instantaneous flow to historical daily
mean flow for all days of the year. Flood stages are determined by
the National Weather Service; not all USGS streamgages have flood stages. Current-conditions
data are provisional and subject to change. A depiction of other streamgages
at or above flood stage is available the NWS
River Conditions Map.
Included on this
page are maps, tables, and charts that summarize current flood conditions using data
from USGS streamgages; photographs of current and historic flooding; information on
mobile applications for current USGS streamflow data; and links to USGS flood
publications and other resources for flood information.
The Vital Nature of Streamgaging
| Feature Story |
Missouri April record flooding
| Release |
California snowmelt flooding concerns
| Release |
Flood and High-Flow Photographs
2017 Water Year
Flint Cr at Maxville MT
June 14 2017: 1,120 ft3/s (measured); gage height 6.00 ft; daily mean = 193 ft3/s, 75 yrs of record
Photograph by K. Finley, USGS
Wind R nr Crowheart WY
June 9 2017: 13,300 ft3/s (mean for day); gage height 3.90 ft; historical daily mean = 3,760 ft3/s, 71 yrs of record
Photograph by USGS
| Feb 10 2017
| Feb 11 2017 |
February 10-11 2017: Ice flow damages USGS 06235500 Little Wind R nr Riverton WY.
Photographs by USGS.
Flood Apps and Pubs
- USGS Mobile Water Data (Beta): USGS streamflow data formatted for your smartphone
- USGS WaterNow: On-demand, current conditions for water data directly to your mobile phone or email
- USGS WaterAlert: Current conditions water data texted or emailed to you
including information on how to manage your subscription.
- 100-year flood--Its all about chance | Poster |
- Flood hazards--A National threat | Fact Sheet |
- Flood management benefits of USGS streamgaging program--National Hydrologic Warning Council
| Report (4.3 MB) |
- Flood of August 1, 1985 in Cheyenne, Wyoming
| Atlas |
Floods of May 1981 in west-central Montana
| Web |
- Floods of May 1978 in southeastern Montana and northeastern Wyoming
| Data |
- Floods of June 1964 in northwestern Montana
| Report |
- Reports about historical floods in Wyoming
| Bibliography |
- Video 2011: The Year of the Flood.
- 1976 Big Thompson flood, Colorado--Thirty years later
| Fact Sheet (6.4 MB) |
- The 1972 Black Hills-Rapid City flood revisited
| Web Page
| Fact Sheet (5.6 MB) |
- Large floods in the United States: Where they happen and why
| Report (7.3 MB) |
- The world's largest floods, past and present: Their causes and magnitudes
| Report (0.8 MB) |
Map of Flood and High-Flow Conditions in Montana and Wyoming.
Flood Tracking Charts
- 09205000 Jun 19, 2017 (record) | ght | q | New Fork R nr Big Piney WY
- 06221400 Jun 17, 2017 (record) | ght | q | Dinwoody Cr ab Lakes nr Burris WY
- 12329500 Jun 14, 2017 (record) | ght | q | Flint Cr at Maxville MT
- 09209400 Jun 11, 2017 (2nd hi) | ght | q | Green R nr La Barge WY
- 06218500 Jun 09, 2017 (2nd hi) | ght | q | Wind R nr Dubois WY
- 06225500 Jun 09, 2017 (2nd hi) | ght | q | Wind R nr Crowheart WY
- 06183450 Mar 20, 2017 (ice jam) | ght | q | Big Muddy Cr nr Antelope MT
- 06172310 Oct 10, 2016 | ght | q | Milk R at Tampico MT
- 06166000 Oct 07, 2016 | ght | q | Beaver Cr bel Guston Coulee nr Saco MT
- 06167500 Oct 05, 2016 | ght | q | Beaver Cr nr Hinsdale MT
Other Current Flood and High-Flow Products
All the water in floods comes from the sky—but have you ever wondered just how many gallons
of water falls on an area when it rains? You might be surprised at how much water comes down.
Use our Water Science rainfall calculator to
see how many gallons of water falls from the sky during a rainstorm.
Bighorn River at entrance to Hot Springs State Park,
Thermopolis, WY, July 24, 1923.
Maximum discharge: 29,800 ft3/s.