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

Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

66°F

19°C

Humidity 93%
Wind Speed S 5 mph
Barometer 30.26 in (1024.0 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 24 Dec 1:56 am CST
Extended Forecast for

2 Miles S Lockhart TX

Dense Fog Advisory December 24, 03:00am until December 24, 09:00am
Click here for hazard details and duration
Dense Fog Advisory

  • Overnight

    Overnight: Patchy dense fog. Otherwise, mostly cloudy, with a low around 63. South wind around 5 mph.

    Low: 63 °F

    Patchy Dense
    Fog

  • Wednesday

    Wednesday: Areas of dense fog before 10am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 79. South wind 5 to 10 mph.

    High: 79 °F

    Areas Dense
    Fog then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 61. South wind around 5 mph.

    Low: 61 °F

    Increasing
    Clouds

  • Christmas Day

    Christmas Day: Cloudy through mid morning, then gradual clearing, with a high near 80. South wind 5 to 10 mph.

    High: 80 °F

    Gradual
    Clearing

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 61. South wind around 5 mph.

    Low: 61 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 82. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 82 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 63. South wind 5 to 10 mph.

    Low: 63 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 83. South wind around 10 mph, with gusts as high as 20 mph.

    High: 83 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 63. South southeast wind 5 to 10 mph.

    Low: 63 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Patchy dense fog. Otherwise, mostly cloudy, with a low around 63. South wind around 5 mph.
Wednesday
Areas of dense fog before 10am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 79. South wind 5 to 10 mph.
Wednesday Night
Increasing clouds, with a low around 61. South wind around 5 mph.
Christmas Day
Cloudy through mid morning, then gradual clearing, with a high near 80. South wind 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 61. South wind around 5 mph.
Friday
Partly sunny, with a high near 82. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 63. South wind 5 to 10 mph.
Saturday
Partly sunny, with a high near 83. South wind around 10 mph, with gusts as high as 20 mph.
Saturday Night
Mostly cloudy, with a low around 63. South southeast wind 5 to 10 mph.
Sunday
Mostly cloudy, with a high near 79.
Sunday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 41.
Monday
Mostly cloudy, with a high near 51.
Monday Night
Mostly cloudy, with a low around 32.
Tuesday
Mostly sunny, with a high near 57.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Lockhart TX
 29.84°N 97.68°W (Elev. 482 ft)
Last Update:
12:44 am CST Dec 24, 2025
Forecast Valid:
2am CST Dec 24, 2025-6pm CST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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