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

Super Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather Threat from the Central Plains to the Great Lakes

Super Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, and thunderstorms to the Marianas Islands into Wednesday. Tropical Storm conditions are likely over Guam. Severe thunderstorms and heavy rain are likely across the Upper Mississippi Valley and Great Lakes region with potential for large to very large hail, damaging wind, and tornadoes through Tuesday. Read More >

Hazardous Weather Conditions

Current conditions at

BLACK ROCK (OKFO3)

Lat: 43.52828°NLon: 121.816°WElev: 4891.0ft.

NA

44°F

7°C

Humidity 64%
Wind Speed SW 5 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Wind Chill41°F (5°C)
Last update 13 Apr 11:15 AM PDT
Extended Forecast for

Cascade Summit OR

Winter Weather Advisory April 14, 11:00pm until April 16, 05:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Today

    Today: Snow showers, mainly before 2pm. High near 38. West northwest wind around 8 mph. Chance of precipitation is 80%. Total daytime snow accumulation of 1 to 2 inches possible.

    High: 38 °F

    Snow Showers

  • Tonight

    Tonight: A 20 percent chance of snow showers before 8pm. Mostly cloudy, with a low around 27. West northwest wind 5 to 7 mph.

    Low: 27 °F

    Slight Chance
    Snow Showers
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: Rain, possibly mixed with snow, mainly after 5pm. High near 44. Light west northwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 44 °F

    Mostly Sunny
    then
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Rain and snow, becoming all snow after 8pm. Low around 31. West wind 8 to 10 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    Low: 31 °F

    Rain/Snow
    then Snow

  • Wednesday

    Wednesday: Snow. The snow could be heavy at times. High near 35. West wind around 11 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.

    High: 35 °F

    Heavy Snow

  • Wednesday Night

    Wednesday Night: Snow showers. Low around 21. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    Low: 21 °F

    Snow Showers

  • Thursday

    Thursday: Snow. High near 34. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    High: 34 °F

    Snow

  • Thursday Night

    Thursday Night: A chance of snow before 11pm. Partly cloudy, with a low around 20.

    Low: 20 °F

    Chance Snow
    then Partly
    Cloudy

  • Friday

    Friday: Sunny, with a high near 46.

    High: 46 °F

    Sunny

Detailed Forecast

Today
Snow showers, mainly before 2pm. High near 38. West northwest wind around 8 mph. Chance of precipitation is 80%. Total daytime snow accumulation of 1 to 2 inches possible.
Tonight
A 20 percent chance of snow showers before 8pm. Mostly cloudy, with a low around 27. West northwest wind 5 to 7 mph.
Tuesday
Rain, possibly mixed with snow, mainly after 5pm. High near 44. Light west northwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Tuesday Night
Rain and snow, becoming all snow after 8pm. Low around 31. West wind 8 to 10 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Wednesday
Snow. The snow could be heavy at times. High near 35. West wind around 11 mph, with gusts as high as 34 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.
Wednesday Night
Snow showers. Low around 21. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Thursday
Snow. High near 34. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Thursday Night
A chance of snow before 11pm. Partly cloudy, with a low around 20.
Friday
Sunny, with a high near 46.
Friday Night
Mostly cloudy, with a low around 28.
Saturday
A slight chance of rain. Snow level rising to 6300 feet in the afternoon. Partly sunny, with a high near 51.
Saturday Night
A chance of rain and snow. Snow level 6700 feet lowering to 6000 feet after midnight . Mostly cloudy, with a low around 33.
Sunday
Rain and snow likely. Snow level 5300 feet. Mostly cloudy, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Cascade Summit OR
 43.58°N 122.05°W (Elev. 5030 ft)
Last Update:
11:26 am PDT Apr 13, 2026
Forecast Valid:
11am PDT Apr 13, 2026-6pm PDT Apr 19, 2026
 
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