National Weather Service United States Department of Commerce

Significant threat for flash flooding continues across the southwestern U.S.

Heavy precipitation continues to be forecast for much of the Southwest U.S. this week due to the remnants of weakening Tropical Storm Odile. The heavy rainfall will be concentrated across southern Arizona, southern New Mexico and western Texas where 3 to 6 inches could fall through Friday, with some locales receiving up to 9 inches. Flash Flood Watches remain in effect for much of this area.
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Current Conditions

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Lewistown MT

7 Day Forecast

For More Weather Information:

Great Falls, MT Local Forecast Office

Tonight

Isolated Thunderstorms Chance for Measurable Precipitation 20%

Isolated
Thunderstorms

Low: 12 °C

Thursday

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 28 °C

Thursday
Night

Chance Thunderstorms Chance for Measurable Precipitation 30%

Chance
Thunderstorms

Low: 11 °C

Friday

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 24 °C

Friday
Night

Partly Cloudy

Partly
Cloudy

Low: 8 °C

Saturday

Sunny

Sunny

High: 22 °C

Saturday
Night

Mostly Clear

Mostly
Clear

Low: 7 °C

Sunday

Sunny

Sunny

High: 21 °C

Sunday
Night

Mostly Clear

Mostly
Clear

Low: 7 °C

Detailed Forecast

  • Tonight Isolated showers and thunderstorms before midnight. Mostly cloudy, with a low around 12. Southeast wind 13 to 16 km/h. Chance of precipitation is 20%.
  • Thursday A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 28. South southwest wind 13 to 18 km/h becoming west southwest 21 to 26 km/h in the afternoon. Winds could gust as high as 37 km/h.
  • Thursday Night A 30 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 11. West southwest wind 16 to 18 km/h.
  • Friday A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 24. West wind 16 to 21 km/h increasing to 29 to 34 km/h in the afternoon. Winds could gust as high as 45 km/h.
  • Friday Night Partly cloudy, with a low around 8. West southwest wind 13 to 16 km/h.
  • Saturday Sunny, with a high near 22.
  • Saturday Night Mostly clear, with a low around 7.
  • Sunday Sunny, with a high near 21.
  • Sunday Night Mostly clear, with a low around 7.
  • Monday Sunny, with a high near 23.
  • Monday Night Mostly clear, with a low around 8.
  • Tuesday Sunny, with a high near 24.
  • Tuesday Night Mostly clear, with a low around 8.
  • Wednesday A slight chance of showers and thunderstorms. Mostly sunny, with a high near 23.