Snow Squalls May Impact the Northeast on Thursday; Dangerously Cold Arctic Air Impact the North-Central US

Snow showers and snow squalls are likely to develop across the Northeast on Thursday. Lake effect snow will persist downwind of the Great Lakes. An arctic blast will bring frigid temperatures, gusty winds and dangerous wind chills to the Northern Plains before expanding to the South and East. A major winter storm will begin impacting the Southern Plains and Lower Mississippi Valley Friday. Read More >

Hazardous Weather Conditions

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

63°F

17°C

Humidity	73%
Wind Speed	S 5 mph
Barometer	30.09 in (1018.7 mb)
Dewpoint	54°F (12°C)
Visibility	10.00 mi
Last update	21 Jan 6:56 pm CST

More Information:

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

Extended Forecast for

4 Miles SSW 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

Tonight
Low: 50 °F
Partly Cloudy
Thursday
High: 73 °F
Patchy Fog
then Mostly
Sunny
Thursday Night
Low: 58 °F
Increasing
Clouds
Friday
High: 69 °F
Chance
Showers
Friday Night
Low: 36 °F
Showers
Saturday
High: 38 °F
Showers
Saturday Night
Low: 18 °F
Wintry Mix
Likely
Sunday
High: 32 °F
Slight Chance
Wintry Mix
then Mostly
Sunny
Sunday Night
Low: 16 °F
Mostly Clear

Detailed Forecast

Tonight

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

Friday

A chance of showers, with thunderstorms also possible after 3pm. Cloudy, with a high near 69. South southeast wind 5 to 10 mph becoming east northeast in the afternoon. Chance of precipitation is 50%.

Friday Night

Showers. Low around 36. North wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

Saturday

Showers. High near 38. North wind 15 to 20 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 15 to 20 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 32. North wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

Sunday Night

Mostly clear, with a low around 16. North wind 5 to 15 mph, with gusts as high as 25 mph.

Monday

Sunny, with a high near 40.

Monday Night

Mostly clear, with a low around 18.

Tuesday

Mostly sunny, with a high near 48.

Tuesday Night

Partly cloudy, with a low around 30.

Wednesday

Mostly sunny, with a high near 53.