National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >

Current conditions at

BLACK ROCK (OKFO3)

Lat: 43.52831°NLon: 121.81601°WElev: 4891.0ft.

NA

41°F

5°C

Humidity 84%
Wind Speed WNW 4 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Wind Chill38°F (3°C)
Last update 09 Dec 02:15 AM PST
Extended Forecast for

5 Miles NE Cascade Summit OR

  • Overnight

    Overnight: Rain. Snow level 9100 feet. Low around 36. Breezy, with a west wind around 25 mph, with gusts as high as 38 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 36 °F

    Rain and
    Breezy

  • Tuesday

    Tuesday: Rain. High near 41. Breezy, with a west wind 21 to 29 mph, with gusts as high as 44 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 41 °F

    Rain and
    Breezy

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before 2am. Snow level 9200 feet lowering to 8300 feet after midnight . Mostly cloudy, with a low around 39. West southwest wind 18 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 39 °F

    Rain Likely

  • Wednesday

    Wednesday: A 40 percent chance of rain, mainly before 10am. Snow level 8000 feet. Partly sunny, with a high near 43. West southwest wind 13 to 17 mph, with gusts as high as 26 mph.

    High: 43 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A slight chance of rain before 10pm, then a slight chance of rain and snow between 10pm and 4am, then a slight chance of rain after 4am. Snow level 7300 feet. Partly cloudy, with a low around 34. West southwest wind 11 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 34 °F

    Slight Chance
    Rain/Snow

  • Thursday

    Thursday: A slight chance of rain before 7am, then a slight chance of rain and snow between 7am and 10am, then a slight chance of rain after 10am. Snow level 7600 feet. Mostly sunny, with a high near 42. Chance of precipitation is 20%.

    High: 42 °F

    Slight Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 46.

    High: 46 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

Detailed Forecast

Overnight
Rain. Snow level 9100 feet. Low around 36. Breezy, with a west wind around 25 mph, with gusts as high as 38 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
Rain. High near 41. Breezy, with a west wind 21 to 29 mph, with gusts as high as 44 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Tuesday Night
Rain likely, mainly before 2am. Snow level 9200 feet lowering to 8300 feet after midnight . Mostly cloudy, with a low around 39. West southwest wind 18 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
A 40 percent chance of rain, mainly before 10am. Snow level 8000 feet. Partly sunny, with a high near 43. West southwest wind 13 to 17 mph, with gusts as high as 26 mph.
Wednesday Night
A slight chance of rain before 10pm, then a slight chance of rain and snow between 10pm and 4am, then a slight chance of rain after 4am. Snow level 7300 feet. Partly cloudy, with a low around 34. West southwest wind 11 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Thursday
A slight chance of rain before 7am, then a slight chance of rain and snow between 7am and 10am, then a slight chance of rain after 10am. Snow level 7600 feet. Mostly sunny, with a high near 42. Chance of precipitation is 20%.
Thursday Night
Mostly clear, with a low around 34.
Friday
Sunny, with a high near 46.
Friday Night
Partly cloudy, with a low around 35.
Saturday
Mostly sunny, with a high near 46.
Saturday Night
A chance of rain and snow. Mostly cloudy, with a low around 34.
Sunday
A chance of snow. Mostly cloudy, with a high near 37.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 35.
Monday
Rain and snow. Snow level 6700 feet rising to 7500 feet in the afternoon. Mostly cloudy, with a high near 40.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NE Cascade Summit OR
 43.62°N 121.97°W (Elev. 6532 ft)
Last Update:
2:21 am PST Dec 9, 2025
Forecast Valid:
2am PST Dec 9, 2025-6pm PST Dec 15, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation