Widespread Showers in the Eastern US; Severe Thunderstorms in the Plains; Heatwave in the Desert Southwest

Widespread showers and thunderstorms across much of the central and eastern U.S. will produce areas of excessive rainfall, especially in the southern Mid-Atlantic states. Scattered severe thunderstorms are expected from Montana into portions of the central/southern Plains this weekend. A heatwave will build in the Desert Southwest, in parts of Arizona, southeastern California, and southern Nevada. Read More >

Current conditions at

Lewistown, Lewistown Municipal Airport (KLWT)

Lat: 47.04917°NLon: 109.46639°WElev: 4167.0ft.

Mostly Cloudy

57°F

14°C

Humidity	93%
Wind Speed	NNW 3 MPH
Barometer	30.05 in (1017.61 mb)
Dewpoint	55°F (13°C)
Visibility	10.00 mi
Last update	15 Jun 04:20 AM MDT

More Information:

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

Extended Forecast for

Lewistown MT

Overnight
Low: 52 °F
Slight Chance
T-storms and
Patchy Fog
Sunday
High: 78 °F
Severe
Thunderstorms
and Patchy
Fog
Sunday Night
Low: 49 °F
Severe
Thunderstorms
then Mostly
Cloudy
Monday
High: 74 °F
Chance
Showers
Monday Night
Low: 49 °F
Chance
Showers
Tuesday
High: 72 °F
Chance
Showers
Tuesday Night
Low: 48 °F
Partly Cloudy
Wednesday
High: 78 °F
Sunny
Wednesday Night
Low: 50 °F
Partly Cloudy

Detailed Forecast

Overnight

A 20 percent chance of showers and thunderstorms. Patchy fog. Otherwise, partly cloudy, with a low around 52. Calm wind.

Sunday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Some of the storms could be severe. Patchy fog before 9am. Otherwise, increasing clouds, with a high near 78. Calm wind becoming east around 6 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday Night

Showers and thunderstorms, mainly before 11pm. Some of the storms could be severe and produce heavy rainfall. Low around 49. East wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between three quarters and one inch possible.

Monday

A 40 percent chance of showers, mainly after noon. Partly sunny, with a high near 74. Calm wind becoming east northeast around 5 mph in the afternoon.

Monday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 49. Northeast wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 40%.

Tuesday

A 50 percent chance of showers. Partly sunny, with a high near 72. Calm wind becoming northwest around 6 mph in the afternoon.

Tuesday Night

Partly cloudy, with a low around 48. South wind around 6 mph.

Wednesday

Sunny, with a high near 78. West northwest wind around 7 mph.

Wednesday Night

Partly cloudy, with a low around 50.

Juneteenth

Sunny, with a high near 81.

Thursday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 51.