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 >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Overcast

72°F

22°C

Humidity	61%
Wind Speed	SW 14 mph
Barometer	30.08 in (1018.0 mb)
Dewpoint	58°F (14°C)
Visibility	10.00 mi
Last update	21 Jan 1:56 pm CST

More Information:

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

Extended Forecast for

San Marcos TX

Extreme Cold Watch January 24, 06:00pm until January 26, 12:00pm

Winter Storm Watch January 24, 12:00am until January 25, 12:00pm

Click here for hazard details and duration

Extreme Cold Watch

Winter Storm Watch

This Afternoon
High: 70 °F
Mostly Sunny
Tonight
Low: 50 °F
Partly Cloudy
Thursday
High: 73 °F
Patchy Fog
then Mostly
Sunny
Thursday Night
Low: 58 °F
Increasing
Clouds
Friday
High: 68 °F
Chance
Showers
Friday Night
Low: 35 °F
Showers
Saturday
High: 36 °F
Showers
Saturday Night
Low: 18 °F
Wintry Mix
Likely
Sunday
High: 31 °F
Slight Chance
Wintry Mix
then Mostly
Sunny

Detailed Forecast

This Afternoon

Mostly sunny, with a high near 70. Southwest wind around 5 mph.

Tonight

Partly cloudy, with a low around 50. South southwest wind around 5 mph becoming north in the evening.

Thursday

Patchy fog before 10am. Otherwise, partly sunny, with a high near 73. North wind around 5 mph becoming southeast in the afternoon.

Thursday Night

Increasing clouds, with a low around 58. South southeast wind around 5 mph.

Friday

A chance of showers, with thunderstorms also possible after 3pm. Cloudy, with a high near 68. South southeast wind 5 to 10 mph becoming east northeast in the afternoon. Chance of precipitation is 50%.

Friday Night

Showers. Low around 35. North wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

Saturday

Showers. High near 36. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.

Saturday Night

Freezing rain and sleet likely. Mostly cloudy, with a low around 18. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.

Sunday

A slight chance of freezing rain and sleet before noon. Partly sunny, with a high near 31. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

Sunday Night

Mostly clear, with a low around 16.

Monday

Sunny, with a high near 40.

Monday Night

Mostly clear, with a low around 18.

Tuesday

Mostly sunny, with a high near 48.