Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

Current conditions at

DIABLO GRANDE (DBLC1)

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

NA

64°F

18°C

Humidity 22%
Wind Speed W 3 MPH
Barometer NA
Dewpoint 24°F (-4°C)
Visibility NA
Last update 20 May 02:00 AM PDT
Extended Forecast for

9 Miles SW Tracy CA

  • Overnight

    Overnight: Mostly clear, with a low around 64. Southwest wind around 8 mph.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 86. Calm wind becoming west northwest 5 to 9 mph in the afternoon.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 65. West wind 8 to 13 mph becoming light south southwest  after midnight. Winds could gust as high as 21 mph.

    Low: 65 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 89. Light and variable wind becoming northwest 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph.

    High: 89 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 65. Southwest wind 6 to 14 mph, with gusts as high as 23 mph.

    Low: 65 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 56.

    Low: 56 °F

    Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 64. Southwest wind around 8 mph.
Wednesday
Sunny, with a high near 86. Calm wind becoming west northwest 5 to 9 mph in the afternoon.
Wednesday Night
Clear, with a low around 65. West wind 8 to 13 mph becoming light south southwest after midnight. Winds could gust as high as 21 mph.
Thursday
Sunny, with a high near 89. Light and variable wind becoming northwest 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph.
Thursday Night
Clear, with a low around 65. Southwest wind 6 to 14 mph, with gusts as high as 23 mph.
Friday
Sunny, with a high near 88.
Friday Night
Clear, with a low around 60.
Saturday
Sunny, with a high near 84.
Saturday Night
Clear, with a low around 56.
Sunday
Sunny, with a high near 81.
Sunday Night
Clear, with a low around 55.
Memorial Day
Sunny, with a high near 81.
Monday Night
Mostly clear, with a low around 54.
Tuesday
Sunny, with a high near 74.
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ABOUT THIS FORECAST

 
Point Forecast:
9 Miles SW Tracy CA
 37.62°N 121.54°W (Elev. 1604 ft)
2:00 am PDT May 20, 2026
2am PDT May 20, 2026-6pm PDT May 26, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database