Heat Continues in the Northeast and Northwest U.S.; Areas of Flash Flooding In the Ohio Valley and Southwest

Dangerous heat will continue to impact portions of the interior Northwest and Northeast U.S. Some relief is expected by Wednesday for the Northeast. Monsoon showers and thunderstorms may result in flash flooding and debris flows from the Four Corners region into the Great Basin this week. Thunderstorms, some severe, may produce excessive rainfall from the Ohio Valley to the Central Appalachians. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

90°F

32°C

Humidity 50%
Wind Speed SE 8 mph
Barometer 29.98 in (1014.0 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 9 Aug 8:56 pm CDT
Extended Forecast for

2 Miles WNW San Marcos Municipal Airport TX

  • Tonight

    Tonight: Mostly clear, with a low around 76. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Mostly Clear

    Low: 76 °F

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 4pm.  Sunny and hot, with a high near 99. Heat index values as high as 104. Light and variable wind becoming south southwest 5 to 10 mph in the morning.

    Sunny then
    Slight Chance
    T-storms

    High: 99 °F

  • Wednesday
    Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 76. North wind 5 to 10 mph becoming south after midnight. Winds could gust as high as 20 mph.

    Slight Chance
    T-storms

    Low: 76 °F

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms, mainly after 1pm.  Mostly sunny, with a high near 97. Heat index values as high as 102. Calm wind becoming west southwest around 5 mph in the morning.

    Slight Chance
    T-storms then
    Chance
    T-storms

    High: 97 °F

  • Thursday
    Night

    Thursday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am.  Partly cloudy, with a low around 75. Southeast wind around 5 mph becoming calm  after midnight.

    Chance
    T-storms

    Low: 75 °F

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 96. Calm wind becoming east around 5 mph in the morning. Winds could gust as high as 20 mph.

    Chance
    T-storms

    High: 96 °F

  • Friday
    Night

    Friday Night: A 20 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 75. East southeast wind 5 to 10 mph becoming light south southeast  after midnight.

    Slight Chance
    T-storms

    Low: 75 °F

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms, mainly after 1pm.  Partly sunny, with a high near 93. Calm wind becoming east southeast around 5 mph in the morning. Winds could gust as high as 20 mph.

    Chance
    T-storms

    High: 93 °F

  • Saturday
    Night

    Saturday Night: Partly cloudy, with a low around 75. East southeast wind around 5 mph becoming calm  after midnight. Winds could gust as high as 20 mph.

    Partly Cloudy

    Low: 75 °F

Detailed Forecast

Tonight
Mostly clear, with a low around 76. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 99. Heat index values as high as 104. Light and variable wind becoming south southwest 5 to 10 mph in the morning.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 76. North wind 5 to 10 mph becoming south after midnight. Winds could gust as high as 20 mph.
Thursday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 97. Heat index values as high as 102. Calm wind becoming west southwest around 5 mph in the morning.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 75. Southeast wind around 5 mph becoming calm after midnight.
Friday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96. Calm wind becoming east around 5 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75. East southeast wind 5 to 10 mph becoming light south southeast after midnight.
Saturday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 93. Calm wind becoming east southeast around 5 mph in the morning. Winds could gust as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 75. East southeast wind around 5 mph becoming calm after midnight. Winds could gust as high as 20 mph.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 97.
Sunday Night
Mostly clear, with a low around 75.
Monday
Sunny and hot, with a high near 99.
Monday Night
Mostly clear, with a low around 75.
Tuesday
Sunny and hot, with a high near 100.
Click Map For Forecast
Point Forecast:
2 Miles WNW San Marcos Municipal Airport TX
 29.9°N 97.91°W (Elev. 640 ft)
3:28 pm CDT Aug 9, 2022
9pm CDT Aug 9, 2022-6pm CDT Aug 16, 2022
 
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