Significant Winter Storm to Bring Heavy Snow and Ice Impacts; Dangerously Cold Temperatures Expands Across the East

A significant, long-duration winter storm will bring widespread heavy snow, sleet, and freezing rain from the Southern Rockies to New England through Monday. Widespread travel disruptions, prolonged power outages, and vast tree damage is likely. Frigid temperatures, gusty winds, and dangerous wind chills will expand from the north-central US to the Southern Plains, MS Valley, and Midwest. Read More >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fog

61°F

16°C

Humidity	100%
Wind Speed	E 7 mph
Barometer	30.07 in (1017.9 mb)
Dewpoint	61°F (16°C)
Visibility	0.25 mi
Last update	23 Jan 7:56 am CST

More Information:

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

Extended Forecast for

San Marcos TX

Dense Fog Advisory until January 23, 10:00am

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

Winter Storm Warning January 24, 06:00am until January 25, 12:00pm

Click here for hazard details and duration

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Extreme Cold Warning

Winter Storm Warning

Dense Fog Advisory until January 23, 10:00am
NOW until 10:00am Fri
Dense Fog Advisory
Today
High: 71 °F
Chance
Showers and
Dense Fog
Tonight
Low: 39 °F
Showers and
Patchy Fog
Saturday
High: 40 °F⇓
Showers then
Chance
Showers
Saturday Night
Low: 22 °F
Wintry Mix
Sunday
High: 32 °F
Slight Chance
Wintry Mix
then Mostly
Sunny
Sunday Night
Low: 14 °F
Mostly Clear
Monday
High: 37 °F
Sunny
Monday Night
Low: 18 °F
Clear

Detailed Forecast

Today

Areas of drizzle before 10am, then a chance of showers between 10am and 3pm, then a chance of showers and thunderstorms after 3pm. Widespread dense fog, mainly before 10am. Otherwise, cloudy, with a high near 71. East wind 5 to 10 mph. Chance of precipitation is 40%.

Tonight

Showers and possibly a thunderstorm. Patchy fog between 8pm and 11pm. Low around 39. East wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

Saturday

Showers and possibly a thunderstorm before noon, then a chance of showers and thunderstorms between noon and 3pm, then a chance of showers after 3pm. Temperature falling to around 32 by 5pm. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Saturday Night

Rain or freezing rain before midnight, then freezing rain between midnight and 3am, then freezing rain and sleet after 3am. Some thunder is also possible. Low around 22. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.

Sunday

A slight chance of freezing rain and sleet before 9am, then a slight chance of sleet between 9am and noon. Mostly sunny, with a high near 32. 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 14. North wind 10 to 15 mph, with gusts as high as 25 mph.

Monday

Sunny, with a high near 37. North wind around 5 mph.

Monday Night

Clear, with a low around 18. East northeast wind around 5 mph becoming calm.

Tuesday

Mostly sunny, with a high near 50. Calm wind becoming south around 5 mph in the morning.

Tuesday Night

Mostly cloudy, with a low around 34.

Wednesday

Mostly sunny, with a high near 53.