Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Current conditions at

Lewistown Divide MT-200 MP 90.3 (MTLEW)

Lat: 47.07579°NLon: 109.26247°WElev: 4723.0ft.

59°F

15°C

Humidity	77%
Wind Speed	NNW 1 MPH
Barometer	NA
Dewpoint	52°F (11°C)
Visibility	NA
Last update	17 Aug 07:30 AM MDT

More Information:

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

Extended Forecast for

6 Miles SE Lewistown MT

Today
High: 81 °F
Mostly Sunny
then Chance
T-storms
Tonight
Low: 54 °F
Heavy Rain
then Haze
Monday
High: 84 °F
Haze then
Chance
Showers
Monday Night
Low: 59 °F
Mostly Clear
Tuesday
High: 91 °F
Sunny
Tuesday Night
Low: 60 °F
Mostly Clear
Wednesday
High: 89 °F
Sunny
Wednesday Night
Low: 56 °F
Partly Cloudy
Thursday
High: 77 °F
Sunny

Detailed Forecast

Today

A 30 percent chance of showers and thunderstorms, mainly after 4pm. Increasing clouds, with a high near 81. Light and variable wind becoming east northeast 5 to 7 mph in the afternoon.

Tonight

A 50 percent chance of showers and thunderstorms, mainly before 9pm. Some of the storms could produce heavy rainfall. Widespread haze after 5am. Cloudy, then gradually becoming partly cloudy, with a low around 54. South wind 6 to 11 mph becoming light and variable. Winds could gust as high as 18 mph.

Monday

A 40 percent chance of showers after noon. Widespread haze before 11am. Mostly sunny, with a high near 84. Calm wind becoming west southwest around 6 mph in the afternoon.

Monday Night

Mostly clear, with a low around 59. Northwest wind around 6 mph becoming southeast after midnight.

Tuesday

Sunny, with a high near 91. Light and variable wind becoming southwest around 6 mph in the afternoon.

Tuesday Night

Mostly clear, with a low around 60. East southeast wind around 7 mph.

Wednesday

Sunny, with a high near 89. South wind 6 to 9 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph.

Wednesday Night

Partly cloudy, with a low around 56. North northwest wind 5 to 8 mph becoming southwest after midnight.

Thursday

Sunny, with a high near 77.