Dangerous heat and humidity from the central U.S. to East Coast this weekend

Hot and very humid conditions will push the heat index to well over 100 degrees across a large portion of the central and eastern U.S. Excessive Heat Warnings and Heat Advisories are in effect for much of the Plains, Miss. Valley, Midwest, Ohio Valley, Mid-Atlantic and southern states. Be very cautious if you must do outdoor activities in these areas during the afternoon and evening this weekend. Read More >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89° N Lon: 97.86° W Elev: 597 ft.

Fair

81°F

27°C

Humidity 79%
Wind Speed S 8 mph
Barometer 29.99 in
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 24 Jul 1:35 am CDT
Detailed forecast for

Caldwell County

Tonight
Partly cloudy. Lows in the upper 70s. South winds 10 to 15 mph.
Sunday
Partly cloudy. Highs around 100. South winds 5 to 10 mph. Highest heat index readings around 109 in the afternoon.
Sunday Night
Partly cloudy. Lows in the upper 70s. South winds 10 to 15 mph.
Monday
Partly cloudy in the morning...then mostly cloudy with a 30 percent chance of showers and thunderstorms in the afternoon. Highs in the upper 90s. South winds 5 mph shifting to the southeast in the afternoon. Highest heat index readings around 105.
Monday Night
Mostly cloudy with a 20 percent chance of showers and thunderstorms. Lows in the mid 70s. South winds 5 to 10 mph.
Tuesday
Mostly cloudy with a 50 percent chance of showers and thunderstorms. Highs in the lower 90s.
Tuesday Night And Wednesday
Mostly cloudy with a 30 percent chance of showers and thunderstorms. Lows in the mid 70s. Highs in the mid 90s.
Wednesday Night Through Thursday Night
Partly cloudy. Lows in the mid 70s. Highs in the mid 90s.
Friday
Partly cloudy with a 20 percent chance of showers and thunderstorms. Highs in the mid 90s. Highest heat index readings around 106.
Friday Night And Saturday
Partly cloudy. Lows in the mid 70s. Highs in the upper 90s.



Click Map For Forecast
255 PM CDT SAT JUL 23 2016
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database