Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Current conditions at

Montague Siskiyou County Airport (KSIY)

Lat: 41.77375°NLon: 122.46817°WElev: 2644.0ft.

Clear

66°F

19°C

Humidity 50%
Wind Speed E 4 MPH
Barometer 30.13 in (1020.32 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 18 Aug 12:53 AM PDT
Extended Forecast for

Etna CA

  • Overnight

    Overnight: Mostly clear, with a low around 59. Light west wind.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89. Calm wind becoming north around 6 mph in the afternoon.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 60. North northwest wind around 6 mph becoming calm  in the evening.

    Low: 60 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 92. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 92 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 61. West northwest wind 5 to 9 mph becoming light and variable  after midnight.

    Low: 61 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 59. Light west wind.
Tuesday
Sunny, with a high near 89. Calm wind becoming north around 6 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 60. North northwest wind around 6 mph becoming calm in the evening.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 92. Calm wind becoming northwest around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 61. West northwest wind 5 to 9 mph becoming light and variable after midnight.
Thursday
Sunny, with a high near 91.
Thursday Night
Partly cloudy, with a low around 60.
Friday
Sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 55.
Saturday
Sunny, with a high near 87.
Saturday Night
Clear, with a low around 55.
Sunday
Sunny, with a high near 89.
Sunday Night
Mostly clear, with a low around 57.
Monday
Sunny, with a high near 90.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Etna CA
 41.46°N 122.9°W (Elev. 3061 ft)
11:26 pm PDT Aug 17, 2026
1am PDT Aug 18, 2026-6pm PDT Aug 24, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database