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

ROCKY BOY (ROCM8)

Lat: 48.17478°NLon: 109.64728°WElev: 4700.0ft.

67°F

19°C

Humidity	NA
Wind Speed	NA NA MPH
Barometer	NA
Dewpoint	N/A
Visibility	NA
Last update	NA

More Information:

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

Extended Forecast for

20 Miles S Lloyd MT

This Afternoon
High: 82 °F
Mostly Sunny
Tonight
Low: 59 °F
Chance
Showers then
Mostly Cloudy
Monday
High: 87 °F
Sunny then
Slight Chance
Showers
Monday Night
Low: 63 °F
Mostly Clear
Tuesday
High: 93 °F
Sunny
Tuesday Night
Low: 65 °F
Partly Cloudy
Wednesday
High: 92 °F
Sunny
Wednesday Night
Low: 60 °F
Partly Cloudy
then Slight
Chance
Showers
Thursday
High: 79 °F
Sunny

Detailed Forecast

This Afternoon

Mostly sunny, with a high near 82. West wind around 8 mph.

Tonight

A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and 10pm. Partly cloudy during the early evening, then becoming cloudy, with a low around 59. West wind around 6 mph becoming light and variable. Chance of precipitation is 40%.

Monday

A 20 percent chance of showers after noon. Mostly sunny, with a high near 87. Calm wind becoming south southwest 5 to 8 mph in the morning.

Monday Night

Mostly clear, with a low around 63. South southwest wind around 6 mph becoming light and variable after midnight.

Tuesday

Sunny, with a high near 93. Light and variable wind becoming south 5 to 7 mph in the afternoon.

Tuesday Night

Partly cloudy, with a low around 65. South wind around 6 mph becoming northeast after midnight.

Wednesday

Sunny, with a high near 92. North wind 6 to 9 mph becoming west in the morning.

Wednesday Night

A slight chance of showers after midnight. Partly cloudy, with a low around 60. Northwest wind 6 to 8 mph.