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

48°F

9°C

Humidity 79%
Wind Speed SE 3 MPH
Barometer NA
Dewpoint 42°F (6°C)
Visibility NA
Last update 19 May 11:00 PM MDT
Extended Forecast for

10 Miles W St. Ignatius MT

  • Overnight

    Overnight: Mostly cloudy, with a low around 39. Southeast wind 3 to 5 mph.

    Low: 39 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of rain before noon, then 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 65. Calm wind becoming northeast 5 to 7 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: 65 °F

    Slight Chance
    Rain then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm before 11pm, then a chance of rain.  Low around 39. North northwest wind around 6 mph becoming calm  in the evening.  Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 39 °F

    Rain then
    Slight Chance
    Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 67. Light north wind.

    High: 67 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 41. North wind around 5 mph becoming calm  in the evening.

    Low: 41 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Saturday Night

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

    Low: 47 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 39. Southeast wind 3 to 5 mph.
Wednesday
A slight chance of rain before noon, then 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 65. Calm wind becoming northeast 5 to 7 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 39. North northwest wind around 6 mph becoming calm in the evening. 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 67. Light north wind.
Thursday Night
Partly cloudy, with a low around 41. North wind around 5 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 73.
Friday Night
Partly cloudy, with a low around 45.
Saturday
Sunny, with a high near 77.
Saturday Night
Partly cloudy, with a low around 47.
Sunday
Mostly sunny, with a high near 79.
Sunday Night
Partly cloudy, with a low around 48.
Memorial Day
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 74.
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 65.
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ABOUT THIS FORECAST

 
Point Forecast:
10 Miles W St. Ignatius MT
 47.33°N 114.31°W (Elev. 2598 ft)
2:01 pm MDT May 19, 2026
12am MDT May 20, 2026-6pm MDT May 26, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database