Heavy Rainfall and Flash Flood Threats From the Lower Mississippi Valley Into Ohio/Tennessee Valleys; Elevated to Critical Fire Concerns Out West

Heavy to excessive rainfall with flash flood concerns will be possible from the Lower Mississippi Valley into parts of the Ohio/Tennessee Valleys. Elevated to Critical Fire weather threats will persist across the Great Basin and central Rockies. Finally, Major to Record river flooding will continue in portions of the Midwest and across parts of North and South Carolina. Read More >

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Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

Lat: 47.04917°NLon: 109.46639°WElev: 4167ft.

Fair

49°F

9°C

Humidity	93%
Wind Speed	ESE 3 MPH
Barometer	29.97 in (1012.7 mb)
Dewpoint	47°F (8°C)
Visibility	10.00 mi
Last update	22 Sep 10:54 pm MDT

More Information:

Local Forecast Office More Local Wx 3 Day History Mobile Weather Hourly Weather Forecast

Extended Forecast for

Lewistown MT

Tonight

Chance Rain
Low: 43 °F
Sunday

Showers
High: 60 °F
Sunday
Night

Partly Cloudy
Low: 38 °F
Monday

Chance Rain
High: 53 °F
Monday
Night

Slight Chance
Rain
Low: 36 °F
Tuesday

Slight Chance
Rain then
Mostly Sunny
High: 56 °F
Tuesday
Night

Mostly Clear
Low: 37 °F
Wednesday

Partly Sunny
High: 58 °F
Wednesday
Night

Chance Rain
Low: 35 °F

Detailed Forecast

Tonight

A 30 percent chance of rain, mainly after 4am. Mostly cloudy, with a low around 43. Southeast wind 5 to 7 mph.

Sunday

Rain before 3pm, then showers likely and possibly a thunderstorm between 3pm and 5pm, then a chance of showers and thunderstorms after 5pm. High near 60. Light and variable wind becoming west northwest 5 to 9 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday Night

Partly cloudy, with a low around 38. West southwest wind 6 to 8 mph.

Monday

A chance of rain, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 53. West northwest wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

Monday Night

A 20 percent chance of rain. Mostly cloudy, with a low around 36. West wind 7 to 11 mph.

Tuesday

A 20 percent chance of rain before noon. Mostly sunny, with a high near 56.

Tuesday Night

Mostly clear, with a low around 37.

Wednesday

Partly sunny, with a high near 58.

Wednesday Night

A chance of rain, mainly after midnight. Mostly cloudy, with a low around 35.

Thursday

Partly sunny, with a high near 54.