Excessive Heat for the South and West; Flash Flooding Conditions in the Southwest U.S.

Dangerous heat is expected across portions of the lower Mississippi Valley today, eastern Oregon Wednesday, central California through Wednesday, and Washington through Saturday. Excessive Heat Warnings are in effect. Monsoonal showers and thunderstorms may result in flash flooding and debris flows over the Southwestern U.S. through Friday. Read More >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Partly Cloudy with Haze

94°F

34°C

Humidity 44%
Wind Speed S 9 mph
Barometer 29.98 in (1014.1 mb)
Dewpoint 69°F (21°C)
Visibility 6.00 mi
Heat Index99°F (37°C)
Last update 16 Aug 12:56 pm CDT
Extended Forecast for

2 Miles SW San Marcos Municipal Airport TX

  • This
    Afternoon

    This Afternoon: Mostly sunny and hot, with a high near 99. Heat index values as high as 104. South southeast wind around 10 mph.

    Hot

    High: 99 °F

  • Tonight

    Tonight: Partly cloudy, with a low around 74. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Partly Cloudy

    Low: 74 °F

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 100. Heat index values as high as 103. Southwest wind 5 to 10 mph.

    Hot

    High: 100 °F

  • Wednesday
    Night

    Wednesday Night: Partly cloudy, with a low around 76. South wind 5 to 10 mph.

    Partly Cloudy

    Low: 76 °F

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after 1pm.  Mostly sunny and hot, with a high near 101. Southwest wind 5 to 10 mph becoming northeast in the afternoon.

    Mostly Sunny
    then Chance
    T-storms

    High: 101 °F

  • Thursday
    Night

    Thursday Night: A 50 percent chance of showers and thunderstorms.  Mostly cloudy, with a low around 74. North northeast wind 5 to 10 mph becoming south southeast after midnight.

    Chance
    T-storms

    Low: 74 °F

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 97. South southwest wind around 5 mph becoming east southeast in the afternoon.

    Chance
    T-storms

    High: 97 °F

  • Friday
    Night

    Friday Night: Mostly cloudy, with a low around 74. South southeast wind around 5 mph.

    Mostly Cloudy

    Low: 74 °F

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 97. South wind 5 to 15 mph, with gusts as high as 20 mph.

    Mostly Sunny
    then Slight
    Chance
    T-storms

    High: 97 °F

Detailed Forecast

This Afternoon
Mostly sunny and hot, with a high near 99. Heat index values as high as 104. South southeast wind around 10 mph.
Tonight
Partly cloudy, with a low around 74. South wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny and hot, with a high near 100. Heat index values as high as 103. Southwest wind 5 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 76. South wind 5 to 10 mph.
Thursday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 101. Southwest wind 5 to 10 mph becoming northeast in the afternoon.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 74. North northeast wind 5 to 10 mph becoming south southeast after midnight.
Friday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 97. South southwest wind around 5 mph becoming east southeast in the afternoon.
Friday Night
Mostly cloudy, with a low around 74. South southeast wind around 5 mph.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 97. South wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 76.
Sunday
A 20 percent chance of showers and thunderstorms. Partly sunny and hot, with a high near 99.
Sunday Night
Partly cloudy, with a low around 76.
Monday
A 30 percent chance of showers and thunderstorms. Partly sunny and hot, with a high near 99.
Click Map For Forecast
Point Forecast:
2 Miles SW San Marcos Municipal Airport TX
 29.88°N 97.89°W (Elev. 597 ft)
12:36 pm CDT Aug 16, 2022
1pm CDT Aug 16, 2022-6pm CDT Aug 22, 2022
 
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