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

Cascade Summit OR

  • Overnight

    Overnight: Rain. Steady temperature around 41. Breezy, with a west wind around 22 mph, with gusts as high as 33 mph. Chance of precipitation is 80%.

    Low: 41 °F

    Rain and
    Breezy

  • Tuesday

    Tuesday: Rain. High near 44. Breezy, with a west wind 20 to 28 mph, with gusts as high as 41 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 44 °F

    Rain and
    Breezy

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before 2am. Mostly cloudy, with a steady temperature around 43. West wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 43 °F

    Rain Likely

  • Wednesday

    Wednesday: A 40 percent chance of rain, mainly before 10am. Snow level 7900 feet. Partly sunny, with a high near 49. West southwest wind around 9 mph.

    High: 49 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain. Snow level 7300 feet. Partly cloudy, with a low around 34. West southwest wind around 7 mph.

    Low: 34 °F

    Slight Chance
    Rain

  • Thursday

    Thursday: A 20 percent chance of rain. Patchy fog after 5pm. Snow level 7500 feet. Otherwise, mostly sunny, with a high near 48.

    High: 48 °F

    Slight Chance
    Rain and
    Patchy Fog

  • Thursday Night

    Thursday Night: Patchy fog before 10pm. Otherwise, mostly clear, with a low around 34.

    Low: 34 °F

    Patchy Fog
    then Mostly
    Clear

  • Friday

    Friday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Friday Night

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

    Low: 35 °F

    Partly Cloudy

Detailed Forecast

Overnight
Rain. Steady temperature around 41. Breezy, with a west wind around 22 mph, with gusts as high as 33 mph. Chance of precipitation is 80%.
Tuesday
Rain. High near 44. Breezy, with a west wind 20 to 28 mph, with gusts as high as 41 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Rain likely, mainly before 2am. Mostly cloudy, with a steady temperature around 43. West wind 10 to 14 mph, with gusts as high as 21 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 7900 feet. Partly sunny, with a high near 49. West southwest wind around 9 mph.
Wednesday Night
A 20 percent chance of rain. Snow level 7300 feet. Partly cloudy, with a low around 34. West southwest wind around 7 mph.
Thursday
A 20 percent chance of rain. Patchy fog after 5pm. Snow level 7500 feet. Otherwise, mostly sunny, with a high near 48.
Thursday Night
Patchy fog before 10pm. Otherwise, mostly clear, with a low around 34.
Friday
Sunny, with a high near 52.
Friday Night
Partly cloudy, with a low around 35.
Saturday
Mostly sunny, with a high near 53.
Saturday Night
A chance of rain. Snow level 6400 feet. Mostly cloudy, with a low around 34.
Sunday
A chance of rain. Snow level 6100 feet. Partly sunny, with a high near 43.
Sunday Night
A chance of rain. Snow level 6200 feet. Mostly cloudy, with a low around 35.
Monday
Rain. Snow level 6700 feet rising to 7500 feet in the afternoon. Mostly cloudy, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Cascade Summit OR
 43.59°N 122.02°W (Elev. 4790 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

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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