Lake-effect Snow and Whiteout Conditions in the Great Lakes Region; Below-average Temperatures in the East

Heavy lake-effect and lake-enhanced snow will persist downwind of the Great Lakes and produce some whiteout conditions that could cause difficult travel conditions. A coastal low will produce moderate to heavy snow over parts of southern and eastern New England into the afternoon. Below average temperatures are expected across the eastern U.S., particularly with chilly morning temperatures. Read More >

Current conditions at

Castroville Municipal Airport (KCVB)

Lat: 29.34°NLon: 98.85°WElev: 771ft.

Fair

43°F

6°C

Humidity 24%
Wind Speed SW 5 mph
Barometer 30.24 in
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 18 Jan 9:15 pm CST
Extended Forecast for

7 Miles SSW Helotes TX

  • Tonight

    Tonight: Clear, with a low around 32. Southwest wind around 5 mph becoming calm  in the evening.

    Low: 32 °F

    Clear

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 65. Light and variable wind becoming southeast 5 to 10 mph in the afternoon.

    High: 65 °F

    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 43. East northeast wind 5 to 10 mph.

    Low: 43 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: A 20 percent chance of showers after noon.  Cloudy, with a high near 57. East wind 5 to 10 mph.

    High: 57 °F

    Cloudy then
    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers, mainly after midnight.  Cloudy, with a low around 50. Southeast wind around 5 mph.

    Low: 50 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A 30 percent chance of showers before noon.  Mostly cloudy, with a high near 65. South southeast wind around 5 mph.

    High: 65 °F

    Chance
    Showers then
    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 48. South southeast wind 5 to 10 mph becoming north northeast after midnight.

    Low: 48 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 64. Northeast wind around 5 mph.

    High: 64 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 46. East wind around 5 mph.

    Low: 46 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 32. Southwest wind around 5 mph becoming calm in the evening.
M.L.King Day
Sunny, with a high near 65. Light and variable wind becoming southeast 5 to 10 mph in the afternoon.
Monday Night
Increasing clouds, with a low around 43. East northeast wind 5 to 10 mph.
Tuesday
A 20 percent chance of showers after noon. Cloudy, with a high near 57. East wind 5 to 10 mph.
Tuesday Night
A 30 percent chance of showers, mainly after midnight. Cloudy, with a low around 50. Southeast wind around 5 mph.
Wednesday
A 30 percent chance of showers before noon. Mostly cloudy, with a high near 65. South southeast wind around 5 mph.
Wednesday Night
Partly cloudy, with a low around 48. South southeast wind 5 to 10 mph becoming north northeast after midnight.
Thursday
Mostly sunny, with a high near 64. Northeast wind around 5 mph.
Thursday Night
Mostly cloudy, with a low around 46. East wind around 5 mph.
Friday
Mostly cloudy, with a high near 66.
Friday Night
Mostly cloudy, with a low around 52.
Saturday
A 20 percent chance of showers. Mostly cloudy, with a high near 67.
Saturday Night
Mostly cloudy, with a low around 40.
Sunday
Partly sunny, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles SSW Helotes TX
 29.48°N 98.74°W (Elev. 997 ft)
5:46 pm CST Jan 18, 2026
9pm CST Jan 18, 2026-6pm CST Jan 25, 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