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, Lewistown Municipal Airport (KLWT)

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

Clear

70°F

21°C

Humidity	52%
Wind Speed	N 0 MPH
Barometer	30.05 in (1017.61 mb)
Dewpoint	52°F (11°C)
Visibility	10.00 mi
Last update	17 Aug 11:05 AM MDT

More Information:

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

Extended Forecast for

7 Miles N Moore MT

Today
High: 83 °F
Chance
T-storms
Tonight
Low: 52 °F
Showers
Likely then
Partly Cloudy
Monday
High: 87 °F
Haze then
Chance
Showers
Monday Night
Low: 56 °F
Mostly Clear
Tuesday
High: 94 °F
Sunny
Tuesday Night
Low: 58 °F
Mostly Clear
Wednesday
High: 90 °F
Sunny
Wednesday Night
Low: 55 °F
Partly Cloudy
Thursday
High: 78 °F
Sunny

Detailed Forecast

Today

A slight chance of showers, then a chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 83. Light and variable wind becoming north around 6 mph in the afternoon. Chance of precipitation is 50%.

Tonight

Showers and thunderstorms likely before 9pm, then a slight chance of showers between 9pm and 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 52. Southwest wind 5 to 8 mph becoming south southeast in the evening. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday

A 30 percent chance of showers after noon. Widespread haze before noon. Mostly sunny, with a high near 87. South southwest wind around 6 mph becoming calm.

Monday Night

Mostly clear, with a low around 56. North wind around 6 mph becoming south after midnight.

Tuesday

Sunny, with a high near 94. South wind 3 to 6 mph.

Tuesday Night

Mostly clear, with a low around 58. Northeast wind around 6 mph becoming south after midnight.

Wednesday

Sunny, with a high near 90. South wind 6 to 9 mph becoming north northwest in the afternoon. Winds could gust as high as 18 mph.

Wednesday Night

Partly cloudy, with a low around 55. North wind 5 to 9 mph becoming west southwest in the evening.

Thursday

Sunny, with a high near 78.