Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

Current conditions at

ST. IGNATIUS (SIGM)

Lat: 47.31333°NLon: 114.09806°WElev: 2990.0ft.

NA

55°F

13°C

Humidity 56%
Wind Speed SSE 5 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Last update 19 May 08:00 PM MDT
Extended Forecast for

17 Miles W St. Ignatius MT

  • Tonight

    Tonight: Mostly cloudy, with a low around 41. West southwest wind 3 to 8 mph.

    Low: 41 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm.  Mostly cloudy, with a high near 61. Calm wind becoming west 5 to 8 mph in the afternoon.  Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 61 °F

    Mostly Cloudy
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm before 11pm, then a chance of rain.  Low around 41. North northwest wind 5 to 7 mph becoming calm  after midnight.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 41 °F

    Rain then
    Slight Chance
    Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 63. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 63 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 44. North northeast wind around 6 mph becoming calm  in the evening.

    Low: 44 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 49.

    Low: 49 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 41. West southwest wind 3 to 8 mph.
Wednesday
A chance of showers and thunderstorms between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Mostly cloudy, with a high near 61. Calm wind becoming west 5 to 8 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Rain and possibly a thunderstorm before 11pm, then a chance of rain. Low around 41. North northwest wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Mostly sunny, with a high near 63. Calm wind becoming north northeast around 5 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 44. North northeast wind around 6 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 69.
Friday Night
Partly cloudy, with a low around 47.
Saturday
Sunny, with a high near 73.
Saturday Night
Partly cloudy, with a low around 49.
Sunday
Mostly sunny, with a high near 75.
Sunday Night
Partly cloudy, with a low around 50.
Memorial Day
Mostly sunny, with a high near 69.
Monday Night
A chance of rain. Mostly cloudy, with a low around 45.
Tuesday
A slight chance of rain. Mostly sunny, with a high near 61.
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ABOUT THIS FORECAST

 
Point Forecast:
17 Miles W St. Ignatius MT
 47.32°N 114.46°W (Elev. 3570 ft)
2:01 pm MDT May 19, 2026
8pm MDT May 19, 2026-6pm MDT May 26, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database