National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Erin Strengthens to a Hurricane; Heavy Rainfall Possible in Puerto Rico and the Virgin Islands, the Upper Midwest, South Texas

Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring moderate to locally heavy rain to portions of South Texas into Saturday. Read More >

Current conditions at

Sidney-Richland (KSDY)

Lat: 47.7°NLon: 104.2°WElev: 1985.0ft.

Partly Cloudy

66°F

19°C

Humidity 75%
Wind Speed NNE 9 MPH
Barometer 30.03 in (1016.93 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 15 Aug 09:56 AM MDT
Extended Forecast for

Lambert MT

  • Today

    Today: A 20 percent chance of showers and thunderstorms before noon. Sunny, with a high near 80. East wind 10 to 14 mph, with gusts as high as 21 mph.

    High: 80 °F

    Slight Chance
    T-storms then
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 59. East southeast wind 8 to 14 mph, with gusts as high as 20 mph.

    Low: 59 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 86. Southeast wind 9 to 15 mph, with gusts as high as 23 mph.

    High: 86 °F

    Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 63. Southeast wind 8 to 14 mph, with gusts as high as 22 mph.

    Low: 63 °F

    Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 88. Southeast wind 7 to 9 mph.

    High: 88 °F

    Partly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 62. East southeast wind 3 to 8 mph.

    Low: 62 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 89. Calm wind becoming south southeast 5 to 7 mph in the morning.

    High: 89 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 62. East wind 5 to 7 mph.

    Low: 62 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 92. Light southeast wind becoming east southeast 5 to 9 mph in the morning.

    High: 92 °F

    Sunny

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms before noon. Sunny, with a high near 80. East wind 10 to 14 mph, with gusts as high as 21 mph.
Tonight
Mostly clear, with a low around 59. East southeast wind 8 to 14 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 86. Southeast wind 9 to 15 mph, with gusts as high as 23 mph.
Saturday Night
A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 63. Southeast wind 8 to 14 mph, with gusts as high as 22 mph.
Sunday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 88. Southeast wind 7 to 9 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 62. East southeast wind 3 to 8 mph.
Monday
Mostly sunny, with a high near 89. Calm wind becoming south southeast 5 to 7 mph in the morning.
Monday Night
A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 62. East wind 5 to 7 mph.
Tuesday
Sunny, with a high near 92. Light southeast wind becoming east southeast 5 to 9 mph in the morning.
Tuesday Night
Mostly clear, with a low around 63. Southeast wind 6 to 9 mph.
Wednesday
Sunny, with a high near 93. South southeast wind 5 to 10 mph.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 61.
Thursday
Mostly sunny, with a high near 84.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lambert MT
 47.67°N 104.62°W (Elev. 2395 ft)
Last Update:
2:37 am MDT Aug 15, 2025
Forecast Valid:
10am MDT Aug 15, 2025-6pm MDT Aug 21, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation