Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

58°F

14°C

Humidity	93%
Wind Speed	Calm
Barometer	30.14 in (1020.5 mb)
Dewpoint	56°F (13°C)
Visibility	10.00 mi
Last update	21 Jan 5:56 am CST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

San Marcos Municipal Airport TX

Today
High: 69 °F
Slight Chance
Showers
Tonight
Low: 50 °F
Partly Cloudy
Thursday
High: 71 °F
Mostly Cloudy
Thursday Night
Low: 55 °F
Mostly Cloudy
Friday
High: 69 °F
Chance
Showers then
Showers
Likely
Friday Night
Low: 29 °F
Showers
Saturday
High: 35 °F
Wintry Mix
Saturday Night
Low: 17 °F
Freezing Rain
Likely
Sunday
High: 31 °F
Slight Chance
Freezing Rain
then Partly
Sunny

Detailed Forecast

Today

A slight chance of showers between 9am and 3pm. Cloudy, then gradually becoming mostly sunny, with a high near 69. South wind around 5 mph becoming west in the afternoon. Chance of precipitation is 20%.

Tonight

Partly cloudy, with a low around 50. North wind around 5 mph.

Thursday

Mostly cloudy, with a high near 71. North wind around 5 mph becoming southeast in the afternoon.

Thursday Night

Mostly cloudy, with a low around 55. South southeast wind around 5 mph.

Friday

Showers likely, mainly after noon. Cloudy, with a high near 69. Southeast wind 5 to 10 mph becoming north northeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%.

Friday Night

Showers. Low around 29. North northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.

Saturday

Rain showers and freezing rain, possibly mixed with sleet. High near 35. North wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.

Saturday Night

Freezing rain likely, mainly before midnight. Cloudy, with a low around 17. North wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%.

Sunday

A slight chance of freezing rain before noon. Mostly cloudy, with a high near 31. North wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

Sunday Night

Partly cloudy, with a low around 14.

Monday

Sunny, with a high near 40.

Monday Night

Mostly clear, with a low around 18.

Tuesday

Sunny, with a high near 48.