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	75%
Wind Speed	SE 6 mph
Barometer	30.18 in (1021.7 mb)
Dewpoint	50°F (10°C)
Visibility	10.00 mi
Last update	21 Jan 12:56 am CST

More Information:

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

Extended Forecast for

San Marcos TX

Overnight
Low: 52 °F
Slight Chance
Showers and
Patchy Fog
Wednesday
High: 69 °F
Slight Chance
Showers
Wednesday Night
Low: 52 °F
Partly Cloudy
Thursday
High: 71 °F
Mostly Cloudy
Thursday Night
Low: 57 °F
Mostly Cloudy
Friday
High: 68 °F
Chance
Showers then
Showers
Likely
Friday Night
Low: 31 °F
Showers
Saturday
High: 35 °F
Wintry Mix
Saturday Night
Low: 18 °F
Freezing Rain
Likely

Detailed Forecast

Overnight

A 20 percent chance of showers. Patchy fog between 3am and 5am. Otherwise, cloudy, with a low around 52. South wind around 5 mph.

Wednesday

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

Wednesday Night

Partly cloudy, with a low around 52. 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 57. South southeast wind around 5 mph.

Friday

Showers likely, mainly after noon. Cloudy, with a high near 68. South 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 31. North northeast wind 10 to 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 around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.

Saturday Night

Freezing rain likely, mainly before midnight. Mostly cloudy, with a low around 18. North wind around 15 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. Chance of precipitation is 20%.

Sunday Night

Partly cloudy, with a low around 16.

Monday

Sunny, with a high near 40.

Monday Night

Mostly clear, with a low around 20.

Tuesday

Sunny, with a high near 48.