Tracking a Winter Storm; Unusual Early-Season Heat Wave in the Southwest

A major winter storm will organize across the Northern Plains today and then rapidly strengthen as it moves into the Great Lakes on Sunday. Heavy snow and blowing snow are likely to persist over the Great Lakes into Monday night. Dry and gusty winds will produce a critical fire risk across the central/southern Plains. An early heatwave will begin to intensify over the western U.S. into next week. Read More >

Current conditions at

Mountain View, Moffett Field (KNUQ)

Lat: 37.40583°NLon: 122.04806°WElev: 33.0ft.

Clear

54°F

12°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 30.1 in (1019.3 mb)
Dewpoint 52°F (11°C)
Visibility 8.00 mi
Last update 15 Mar 03:35 AM PDT
Extended Forecast for

Sunnyvale CA

Heat Advisory March 16, 10:00am until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  • Overnight

    Overnight: Patchy fog.  Otherwise, partly cloudy, with a low around 49. Calm wind.

    Low: 49 °F

    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 8am.  Otherwise, mostly sunny, with a high near 80. Calm wind becoming north northwest 5 to 7 mph in the afternoon.

    High: 80 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 56. North northwest wind around 6 mph becoming calm  in the evening.

    Low: 56 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 86. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 86 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 59. Northwest wind 5 to 7 mph becoming calm  in the evening.

    Low: 59 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 62.

    Low: 62 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 62.

    Low: 62 °F

    Clear

Detailed Forecast

Overnight
Patchy fog. Otherwise, partly cloudy, with a low around 49. Calm wind.
Sunday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 80. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 56. North northwest wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 86. Calm wind becoming north northwest around 6 mph in the afternoon.
Monday Night
Clear, with a low around 59. Northwest wind 5 to 7 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 91.
Tuesday Night
Clear, with a low around 62.
Wednesday
Sunny, with a high near 91.
Wednesday Night
Clear, with a low around 62.
Thursday
Sunny, with a high near 91.
Thursday Night
Clear, with a low around 64.
Friday
Sunny, with a high near 93.
Friday Night
Mostly clear, with a low around 63.
Saturday
Sunny, with a high near 86.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Sunnyvale CA
 37.4°N 122.03°W (Elev. 46 ft)
2:40 am PDT Mar 15, 2026
3am PDT Mar 15, 2026-6pm PDT Mar 21, 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