Flooding Risks from Tropical Moisture Across the Intermountain West and East Coast

Tropical moisture from Isaias and Rachel will impact portions of the Intermountain West and East Coast states. Flooding, gusty winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, record warmth will spread northward across the Mississippi Valley the next few days. Looking for snow, the first winter storm of the season is underway across the northern Rockies. Read More >

Hazardous Weather Conditions

Winter Storm Warning until October 12, 06:00 AM MDT

Current conditions at

HELENA (HRWM8)

Lat: 46.73167°NLon: 112.01917°WElev: 3800.0ft.

31°F

-1°C

Humidity	91%
Wind Speed	NNE 4 MPH
Barometer	NA
Dewpoint	29°F (-2°C)
Visibility	NA
Wind Chill	27°F (-3°C)
Last update	11 Oct 05:53 AM MDT

More Information:

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

Extended Forecast for

6 Miles S Marysville MT

Winter Storm Warning October 11, 06:09am until October 12, 06:00am

Click here for hazard details and duration

Winter Storm Warning

Winter Storm Warning October 11, 06:09am until October 12, 06:00am
NOW until 6:00am Mon
Winter Storm Warning
Today
High: 25 °F
Snow and
Patchy
Blowing Snow
Tonight
Low: 23 °F
Snow and
Patchy
Blowing Snow
Columbus Day
High: 31 °F
Chance Snow
then Mostly
Cloudy
Monday Night
Low: 21 °F
Partly Cloudy
Tuesday
High: 38 °F
Mostly Sunny
Tuesday Night
Low: 25 °F
Mostly Clear
Wednesday
High: 41 °F
Sunny
Wednesday Night
Low: 30 °F
Mostly Clear

Detailed Forecast

Today

Snow. Patchy blowing snow before 10am. High near 25. Blustery, with a north northeast wind 16 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 100%. Total daytime snow accumulation of 3 to 5 inches possible.

Tonight

Snow. Patchy blowing snow between 9pm and 1am. Low around 23. North northeast wind 10 to 20 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.

Columbus Day

A 50 percent chance of snow before 8am. Mostly cloudy, with a high near 31. North northeast wind 5 to 8 mph becoming calm in the afternoon. New snow accumulation of less than a half inch possible.

Monday Night

Partly cloudy, with a low around 21. Calm wind becoming west southwest 5 to 9 mph in the evening.

Tuesday

Mostly sunny, with a high near 38. West southwest wind 5 to 10 mph becoming light west in the afternoon.

Tuesday Night

Mostly clear, with a low around 25. Calm wind becoming west southwest 5 to 8 mph in the evening.

Wednesday

Sunny, with a high near 41. West southwest wind 7 to 10 mph.

Wednesday Night

Mostly clear, with a low around 30. West southwest wind 6 to 10 mph.

Thursday

Mostly sunny, with a high near 42.