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.

Overcast

59°F

15°C

Humidity	87%
Wind Speed	NE 8 mph
Barometer	30.14 in (1020.1 mb)
Dewpoint	55°F (13°C)
Visibility	10.00 mi
Last update	22 Jan 4:56 am 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, 06:00am until January 25, 12:00pm

Click here for hazard details and duration

Extreme Cold Watch

Winter Storm Watch

Today
High: 72 °F
Patchy Fog
then Mostly
Sunny
Tonight
Low: 57 °F
Increasing
Clouds
Friday
High: 68 °F
Chance
Showers
Friday Night
Low: 37 °F
Showers
Saturday
High: 47 °F
Showers
Saturday Night
Low: 22 °F
Wintry Mix
Sunday
High: 32 °F
Chance Wintry
Mix then
Mostly Sunny
Sunday Night
Low: 17 °F
Mostly Clear
Monday
High: 41 °F
Sunny

Detailed Forecast

Today

Patchy fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 72. North northeast wind around 5 mph becoming east southeast in the afternoon.

Tonight

Increasing clouds, with a low around 57. East wind around 5 mph becoming calm.

Friday

A 50 percent chance of showers. Cloudy, with a high near 68. East northeast wind 5 to 10 mph. New precipitation amounts of less than a tenth of an inch possible.

Friday Night

Showers and possibly a thunderstorm. Low around 37. East northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

Saturday

Showers and possibly a thunderstorm before noon, then showers likely between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. High near 47. North northeast wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.

Saturday Night

Rain or freezing rain before midnight, then freezing rain between midnight and 3am, then freezing rain, possibly mixed with sleet after 3am. Low around 22. North wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%.

Sunday

A chance of freezing rain and sleet before noon. Mostly sunny, with a high near 32. North wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

Sunday Night

Mostly clear, with a low around 17. North wind 5 to 15 mph, with gusts as high as 25 mph.

Monday

Sunny, with a high near 41. North wind around 5 mph becoming east in the afternoon.

Monday Night

Mostly clear, with a low around 21.

Tuesday

Mostly sunny, with a high near 51.

Tuesday Night

Partly cloudy, with a low around 35.

Wednesday

Mostly sunny, with a high near 58.