Severe Thunderstorms for the Center of the Nation; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

A round of severe thunderstorms are forecast across areas of the Southern Plains, Mississippi Valley and Great Lakes this afternoon and tonight; The threat for flash flooding will also accompany these storms. The rainfall for the Great Lakes region could prolong the ongoing flooding. Where the rain is needed, the Southern High Plains, critical fire weather concerns through today. Read More >

Current conditions at

DIABLO GRANDE (DBLC1)

Lat: 37.32927°NLon: 121.29538°WElev: 1861.0ft.

NA

53°F

12°C

Humidity 33%
Wind Speed SW 1 MPH
Barometer NA
Dewpoint 24°F (-4°C)
Visibility NA
Last update 18 Apr 01:00 AM PDT
Extended Forecast for

15 Miles S Tracy CA

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 48. West southwest wind 3 to 5 mph.

    Low: 48 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 73. Calm wind becoming east around 6 mph in the morning.

    High: 73 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 50. Light and variable wind becoming west southwest around 6 mph in the evening.

    Low: 50 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 73. South southwest wind 5 to 8 mph.

    High: 73 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 44. Southwest wind 7 to 10 mph, with gusts as high as 18 mph.

    Low: 44 °F

    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of rain after 11am.  Mostly sunny, with a high near 71.

    High: 71 °F

    Slight Chance
    Rain

  • Monday Night

    Monday Night: Rain likely, mainly after 11pm.  Mostly cloudy, with a low around 48. Chance of precipitation is 70%.

    Low: 48 °F

    Rain Likely

  • Tuesday

    Tuesday: Rain before 11am, then showers and possibly a thunderstorm after 11am.  Cloudy, with a high near 57.

    High: 57 °F

    Showers

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before 11pm.  Mostly cloudy, with a low around 43.

    Low: 43 °F

    Rain Likely

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 48. West southwest wind 3 to 5 mph.
Saturday
Mostly sunny, with a high near 73. Calm wind becoming east around 6 mph in the morning.
Saturday Night
Mostly cloudy, with a low around 50. Light and variable wind becoming west southwest around 6 mph in the evening.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 73. South southwest wind 5 to 8 mph.
Sunday Night
Partly cloudy, with a low around 44. Southwest wind 7 to 10 mph, with gusts as high as 18 mph.
Monday
A 20 percent chance of rain after 11am. Mostly sunny, with a high near 71.
Monday Night
Rain likely, mainly after 11pm. Mostly cloudy, with a low around 48. Chance of precipitation is 70%.
Tuesday
Rain before 11am, then showers and possibly a thunderstorm after 11am. Cloudy, with a high near 57.
Tuesday Night
Rain likely, mainly before 11pm. Mostly cloudy, with a low around 43.
Wednesday
A chance of rain. Partly sunny, with a high near 58.
Wednesday Night
Mostly clear, with a low around 41.
Thursday
Sunny, with a high near 64.
Thursday Night
Mostly clear, with a low around 42.
Friday
Sunny, with a high near 66.
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ABOUT THIS FORECAST

 
Point Forecast:
15 Miles S Tracy CA
 37.52°N 121.46°W (Elev. 1969 ft)
2:01 am PDT Apr 18, 2026
2am PDT Apr 18, 2026-6pm PDT Apr 24, 2026
 
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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