Montana alerts

Big Horn County, Montana weather alerts

1 National Weather Service alert is in force for Big Horn County: a flood watch.

Checked Sun, Sep 20, 2026, 3:41 PM MDT. Times are Mountain Daylight Time.

Big Horn County forecastLive radar here

Warnings on the map

Every watch, warning and advisory the National Weather Service has in force over Big Horn County, Montana. Open it for the live map, where it pans and zooms.

Every watch, warning and advisory the National Weather Service has in force over Big Horn County, Montana Open the live map with warnings and watches

Map layer from NOAA National Weather Service. Boundaries from the Iowa Environmental Mesonet.

Alerts in force1

Every product in force for Big Horn County, worst first, with its full text.

Flood Watch

Severe

Flood Watch issued September 20 at 1:56PM MDT until September 20 at 6:00PM MDT by NWS Billings MT

Issued Until 2 hr 18 min left

Areas Musselshell, MT; Treasure, MT; Northern Rosebud, MT; Custer, MT; Fallon, MT; Powder River, MT; Carter, MT; Northern Big Horn, MT; Southern Rosebud, MT; Southern Big Horn, MT; Bighorn Canyon, MT; Pryor/Northern Bighorn Mountains, MT; Northeastern Yellowstone, MT; Southwestern Yellowstone, MT; Northeast Bighorn Mountains, WY; Sheridan Foothills, WY

Full text

Showers continue over southeast Montana and northern Wyoming today. A few thunderstorms may develop as well. The risk of flooding continues. * WHAT...Flooding caused by excessive rainfall is possible, along with flash flooding over recent burn scars. * WHERE...Southeast Montana and Sheridan County Wyoming. * WHEN...Until 6 PM MDT this evening. * IMPACTS...Excessive runoff may result in flooding of creeks and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. The risk of flooding will diminish late this afternoon and evening as showers taper off. * ADDITIONAL DETAILS... - The heaviest rainfall is slowly shifting eastward to southeast Montana and northeast Wyoming. - The Elk and McGhee-Remington burn scars are particularly vulnerable to flash flooding and debris flows. Any other burn scars from this summer will have elevated flash flood potential as well. - http://www.weather.gov/safety/flood

What to do

Monitor the latest forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

NWS Billings MTShare this alert

The past year in Big Horn County

In the past year the National Weather Service issued 110 alerts for Big Horn County, including 29 severe thunderstorm warnings, 8 high wind warnings, 8 red flag warnings and 3 extreme heat warnings.

ProductIssuedMost recent
Severe Thunderstorm Warning29Aug 27, 2026
High Wind Warning8May 13, 2026
Red Flag Warning8Sep 4, 2026
Extreme Heat Warning3Aug 1, 2026
Winter Storm Warning3Apr 2, 2026
Flash Flood Warning1Jun 27, 2026
Severe Thunderstorm Watch8Aug 23, 2026
High Wind Watch6Mar 12, 2026
Fire Weather Watch5Sep 4, 2026
Winter Storm Watch4Apr 2, 2026
Extreme Heat Watch3Aug 1, 2026
Flood Watch3Sep 18, 2026
Winter Weather Advisory23May 21, 2026
Flood Advisory5Jul 29, 2026
Heat Advisory1Jul 25, 2026

Warnings issued

  1. Red Flag Warning
  2. Red Flag Warning
  3. Severe Thunderstorm Warning
  4. Red Flag Warning
  5. Red Flag Warning
  6. Extreme Heat Warning
  7. Red Flag Warning
  8. Extreme Heat Warning
  9. Severe Thunderstorm Warning
  10. Severe Thunderstorm Warning
  11. Severe Thunderstorm Warning
  12. Severe Thunderstorm Warning
  13. Severe Thunderstorm Warning
  14. Red Flag Warning
  15. Extreme Heat Warning
  16. Severe Thunderstorm Warning
  17. Severe Thunderstorm Warning
  18. Severe Thunderstorm Warning
  19. Severe Thunderstorm Warning
  20. Severe Thunderstorm Warning
  21. Severe Thunderstorm Warning
  22. Severe Thunderstorm Warning
  23. Flash Flood Warning
  24. Severe Thunderstorm Warning
  25. Severe Thunderstorm Warning
  26. Severe Thunderstorm Warning
  27. Severe Thunderstorm Warning
  28. Severe Thunderstorm Warning
  29. Severe Thunderstorm Warning
  30. Severe Thunderstorm Warning
  31. Severe Thunderstorm Warning
  32. Severe Thunderstorm Warning
  33. Severe Thunderstorm Warning
  34. Severe Thunderstorm Warning
  35. Severe Thunderstorm Warning
  36. Severe Thunderstorm Warning
  37. Severe Thunderstorm Warning
  38. Severe Thunderstorm Warning
  39. High Wind Warning
  40. Severe Thunderstorm Warning
  41. Red Flag Warning
  42. Winter Storm Warning
  43. Red Flag Warning
  44. Winter Storm Warning
  45. High Wind Warning
  46. High Wind Warning
  47. High Wind Warning
  48. High Wind Warning
  49. High Wind Warning
  50. High Wind Warning
  51. Winter Storm Warning
  52. High Wind Warning
Every alert, most recent first
  1. Flood Watch
  2. Fire Weather Watch
  3. Red Flag Warning
  4. Red Flag Warning
  5. Severe Thunderstorm Warning
  6. Severe Thunderstorm Watch
  7. Severe Thunderstorm Watch
  8. Fire Weather Watch
  9. Red Flag Warning
  10. Red Flag Warning
  11. Extreme Heat Watch
  12. Extreme Heat Warning
  13. Flood Advisory
  14. Flood Advisory
  15. Heat Advisory
  16. Severe Thunderstorm Watch
  17. Fire Weather Watch
  18. Red Flag Warning
  19. Extreme Heat Watch
  20. Extreme Heat Warning
  21. Flood Watch
  22. Severe Thunderstorm Warning
  23. Severe Thunderstorm Warning
  24. Flood Advisory
  25. Flood Advisory
  26. Severe Thunderstorm Warning
  27. Flood Watch
  28. Severe Thunderstorm Warning
  29. Severe Thunderstorm Warning
  30. Red Flag Warning
  31. Fire Weather Watch
  32. Extreme Heat Warning
  33. Extreme Heat Watch
  34. Severe Thunderstorm Warning
  35. Severe Thunderstorm Warning
  36. Flood Advisory
  37. Severe Thunderstorm Warning
  38. Severe Thunderstorm Warning
  39. Severe Thunderstorm Warning
  40. Severe Thunderstorm Warning

The 40 most recent of 110.

From the Iowa Environmental Mesonet’s archive of NWS watches, warnings and advisories (VTEC), by the county’s own code and the forecast zones inside it. Each date links to the event at the IEM.

Nearby

The counties around Big Horn County, with what is in force in each.

What this means

Warning
The hazard is happening or about to. Act now: a tornado warning means take shelter, a flash flood warning means move to higher ground.
Watch
Conditions favor the hazard. Nothing is happening yet; have a plan and be ready to act if a warning follows.
Advisory
A hazard that is less serious than a warning but can still cause trouble, such as dense fog, heat or light ice.
Statement
Information about weather that does not yet meet a warning: a strong storm, a hydrologic update, or a special weather statement.

Severity (extreme, severe, moderate, minor) is the rating the issuing office gives each product. More on the difference: tornado watch vs. tornado warning. Alerts come from the National Weather Service; follow its instructions and your local officials.

Sources

Alerts from the National Weather Service's public feed, read afresh every minute, and matched to counties and zones by their UGC codes. Warnings from outside the United States come from each country's own meteorological service. Follow the issuing office's instructions and your local officials.