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

USCRN SITE NEAR LEWISTOWN 42WSW (JRWM8)

Lat: 46.88472°NLon: 110.28944°WElev: 5045.0ft.

74°F

23°C

Humidity	42%
Wind Speed	NA NA MPH
Barometer	NA
Dewpoint	49°F (9°C)
Visibility	NA
Last update	17 Aug 04:00 PM MDT

More Information:

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

Extended Forecast for

11 Miles ENE Sand Point MT

This Afternoon
High: 73 °F
Showers
Likely
Tonight
Low: 55 °F
Heavy Rain
then Haze
Monday
High: 82 °F
Sunny then
Slight Chance
T-storms
Monday Night
Low: 61 °F
Slight Chance
T-storms then
Mostly Clear
Tuesday
High: 89 °F
Sunny
Tuesday Night
Low: 61 °F
Mostly Clear
Wednesday
High: 87 °F
Sunny
Wednesday Night
Low: 56 °F
Slight Chance
T-storms then
Slight Chance
Showers
Thursday
High: 76 °F
Sunny

Detailed Forecast

This Afternoon

Showers likely and possibly a thunderstorm. Mostly cloudy, with a steady temperature around 73. West wind around 6 mph. Chance of precipitation is 60%.

Tonight

A 50 percent chance of showers and thunderstorms, mainly before 9pm. Some of the storms could produce heavy rainfall. Widespread haze after 1am. Cloudy during the early evening, then gradual clearing, with a low around 55. West northwest wind around 6 mph becoming light and variable after midnight.

Monday

A 20 percent chance of showers and thunderstorms after 3pm. Sunny, with a high near 82. Calm wind becoming west southwest 5 to 9 mph in the morning.

Monday Night

A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 61. West northwest wind around 6 mph becoming light and variable in the evening. Chance of precipitation is 20%.

Tuesday

Sunny, with a high near 89. South southwest wind 3 to 7 mph.

Tuesday Night

Mostly clear, with a low around 61. West southwest wind around 6 mph becoming light and variable.

Wednesday

Sunny, with a high near 87. West northwest wind 6 to 10 mph, with gusts as high as 20 mph.

Wednesday Night

A slight chance of showers and thunderstorms. Partly cloudy, with a low around 56. West wind 5 to 8 mph.

Thursday

Sunny, with a high near 76.

Thursday Night

Mostly clear, with a low around 52.