San Marcos, Texas Weather Conditions

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Current Conditions

  • 68°
  • Mostly Cloudy
  • Wind: SE 9 mph
  • Humidity: 88%
  • Visibility: 10.0 miles
  • Dew Point: 64°
  • Pressure: 30.03 in. -

Nowcast

  • Now as of 6:41 PM CST on November 21, 2014

    Through 9 PM CST...scattered showers and isolated thunderstorms will continue. Rainfall amounts between 1/10 and 1/4 of an inch will be possible with this activity...with isolated amounts of 1/2 to 1 inch. Isolated cloud to ground lightning is also possible.

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Next 12 Hours

6  pm
9  pm
12  am
3  am
6  am
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
Chance of a Thunderstorm
Chance of T-storms
Thunderstorm
T-storms
66°
66°
63°
64°
64°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Saturday
  • Thunderstorm
  • High: 73 °
  • Low: 52 °
  • T-Storms
  • Sunday
  • Clear
  • High: 79 °
  • Low: 45 °
  • Clear
  • Monday
  • Partly Cloudy
  • High: 64 °
  • Low: 37 °
  • Partly Cloudy
  • Tuesday
  • Partly Cloudy
  • High: 61 °
  • Low: 28 °
  • Partly Cloudy
  • Wednesday
  • Partly Cloudy
  • High: 68 °
  • Low: 43 °
  • Partly Cloudy

Forecast for San Marcos, Texas

Updated: 3:00 PM CST on November 21, 2014

  • Friday

    Overcast with a chance of a thunderstorm and a chance of rain. Fog early. High of 73F. Winds from the SSE at 5 to 15 mph. Chance of rain 50%.

  • Friday Night

    Overcast with a chance of a thunderstorm and a chance of rain. Low of 61F. Breezy. Winds from the SE at 10 to 20 mph. Chance of rain 50%.

  • Saturday

    Overcast with thunderstorms and rain showers. High of 73F. Breezy. Winds from the SE at 10 to 20 mph. Chance of rain 90% with rainfall amounts near 0.4 in. possible.

  • Saturday Night

    Partly cloudy with a chance of a thunderstorm and a chance of rain. Fog overnight. Low of 52F. Winds from the SW at 5 to 10 mph. Chance of rain 20% with rainfall amounts near 0.4 in. possible.

  • Sunday

    Clear in the morning, then partly cloudy. High of 79F. Breezy. Winds from the WSW at 10 to 20 mph.

  • Sunday Night

    Clear. Low of 45F. Winds from the NW at 5 to 15 mph.

  • Monday

    Partly cloudy in the morning, then clear. High of 64F. Winds from the North at 5 to 15 mph.

  • Monday Night

    Partly cloudy in the evening, then clear. Low of 37F. Winds less than 5 mph.

  • Tuesday

    Partly cloudy in the morning, then clear. High of 61F. Winds from the WSW at 5 to 15 mph shifting to the NW in the afternoon.

  • Tuesday Night

    Clear. Low of 28F. Winds from the NNW at 5 to 10 mph shifting to the West after midnight.

  • Wednesday

    Clear. High of 68F. Winds from the West at 5 to 10 mph.

  • Wednesday Night

    Partly cloudy. Low of 43F. Winds from the NE at 5 to 10 mph.

  • Thursday

    Clear. High of 59F. Winds from the NE at 5 to 10 mph.

  • Thursday Night

    Clear. Low of 34F. Winds from the ESE at 5 to 10 mph.

  • Friday

    Clear. High of 61F. Winds from the SE at 5 to 15 mph.

  • Friday Night

    Partly cloudy. Fog overnight. Low of 41F. Winds from the SSE at 5 to 15 mph.

  • Saturday

    Partly cloudy with a chance of rain. Fog early. High of 63F. Winds from the South at 5 to 10 mph. Chance of rain 20%.

  • Saturday Night

    Mostly cloudy with a chance of rain. Fog overnight. Low of 43F. Winds from the SSE at 5 to 10 mph. Chance of rain 20%.

  • Sunday

    Partly cloudy with a chance of a thunderstorm. Fog early. High of 63F. Winds less than 5 mph. Chance of rain 20%.

  • Sunday Night

    Clear. Low of 39F. Winds less than 5 mph.

  • Monday

    Clear. High of 64F. Winds less than 5 mph.

  • Monday Night

    Clear. Fog overnight. Low of 39F. Winds less than 5 mph.

  • Tuesday

    Clear. Fog early. High of 63F. Winds less than 5 mph.

  • Tuesday Night

    Clear. Low of 39F. Winds from the SE at 5 to 10 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Spring Lake Hills, San Marcos, TX

Updated: 7:17 PM CST

Temperature: 68.0 °F Dew Point: 67 °F Humidity: 95% Wind: South at 1.1 mph Pressure: 30.22 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Willow Creek, San Marcos, TX

Updated: 7:17 PM CST

Temperature: 69.3 °F Dew Point: 67 °F Humidity: 91% Wind: Calm Pressure: 29.89 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Siesta Verde, San Marcos, TX

Updated: 7:17 PM CST

Temperature: 68.9 °F Dew Point: 68 °F Humidity: 94% Wind: SE at 6.0 mph Pressure: 29.18 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Lime Kiln, San Marcos, TX

Updated: 7:17 PM CST

Temperature: 67.7 °F Dew Point: 66 °F Humidity: 94% Wind: ESE at 3.0 mph Pressure: 29.99 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Hunter Ridge, San Marcos, TX

Updated: 7:17 PM CST

Temperature: 68.6 °F Dew Point: 66 °F Humidity: 92% Wind: SE at 4.0 mph Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Oak Meadows, San Marcos, TX

Updated: 7:17 PM CST

Temperature: 67.3 °F Dew Point: 67 °F Humidity: 99% Wind: SSE at 1.3 mph Pressure: 29.97 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Four Seasons, Kyle, TX

Updated: 7:17 PM CST

Temperature: 68.6 °F Dew Point: 66 °F Humidity: 91% Wind: SE at 3.0 mph Pressure: 30.07 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Goodger Farm, Martindale, TX

Updated: 7:17 PM CST

Temperature: 69.3 °F Dew Point: 68 °F Humidity: 95% Wind: Calm Pressure: 29.94 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Silverado, Kyle, TX

Updated: 7:16 PM CST

Temperature: 73.6 °F Dew Point: 73 °F Humidity: 98% Wind: West at 4.2 mph Pressure: 29.89 in Hourly Precipitation: - Heat Index: - Graphs

Location: Downtown, Staples, TX

Updated: 7:17 PM CST

Temperature: 71.6 °F Dew Point: 68 °F Humidity: 86% Wind: SSE at 3.6 mph Pressure: 30.04 in Hourly Precipitation: 0.00 in Heat Index: 70 °F Graphs

Location: River Mountain Ranch, Wimberley, TX

Updated: 7:17 PM CST

Temperature: 67.5 °F Dew Point: 67 °F Humidity: 99% Wind: ESE at 3.6 mph Pressure: 29.98 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Havenwood, New Braunfels, TX

Updated: 7:14 PM CST

Temperature: 67.7 °F Dew Point: 66 °F Humidity: 95% Wind: Calm Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: paradise hills, Wimberley, TX

Updated: 7:17 PM CST

Temperature: 68.2 °F Dew Point: 52 °F Humidity: 57% Wind: West at 3.4 mph Pressure: 28.67 in Hourly Precipitation: 0.06 in Heat Index: - Graphs

Location: rolling oaks, New Braunfels, TX

Updated: 7:17 PM CST

Temperature: 67.6 °F Dew Point: 67 °F Humidity: 97% Wind: SE at 1.3 mph Pressure: 29.68 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: ParkPlace4RV's, Canyon Lake, TX

Updated: 7:17 PM CST

Temperature: 67.0 °F Dew Point: 66 °F Humidity: 97% Wind: SE at 3.0 mph Pressure: 29.99 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Un Encino Rancho - Box Canyon, Wimberley, TX

Updated: 7:12 PM CST

Temperature: 66.8 °F Dew Point: 66 °F Humidity: 97% Wind: Calm Pressure: 29.88 in Hourly Precipitation: 0.08 in Heat Index: - Graphs

Location: Hilltop Ridge - The Summit, New Braunfels, TX

Updated: 7:07 PM CST

Temperature: 67.4 °F Dew Point: 66 °F Humidity: 96% Wind: East at 2.0 mph Pressure: 29.98 in Hourly Precipitation: 0.10 in Heat Index: - Graphs

Location: River Road/Lange Road, Wimberley, TX

Updated: 7:03 PM CST

Temperature: 68.5 °F Dew Point: 67 °F Humidity: 95% Wind: SE at 4.7 mph Pressure: 29.89 in Hourly Precipitation: - Heat Index: - Graphs

Location: Sierra West Section 2, Driftwood, TX

Updated: 7:17 PM CST

Temperature: 67.8 °F Dew Point: - Humidity: 96% Wind: Calm Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: River Chase, New Braunfels, TX

Updated: 7:08 PM CST

Temperature: 66.7 °F Dew Point: 62 °F Humidity: 85% Wind: SSW at 3.8 mph Pressure: 29.78 in Hourly Precipitation: - Heat Index: - Graphs

Location: Guadalupe River at Riverside Path, Canyon Lake, TX

Updated: 7:17 PM CST

Temperature: 67.6 °F Dew Point: 68 °F Humidity: 99% Wind: Calm Pressure: 29.88 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: RAWS AUSTIN WATER QD TX US, Driftwood, TX

Updated: 6:48 PM CST

Temperature: 68 °F Dew Point: 67 °F Humidity: 96% Wind: SE at 4 mph Pressure: - Hourly Precipitation: 0.07 in Heat Index: - Graphs

Location: Gruene Crossing, New Braunfels, TX

Updated: 7:17 PM CST

Temperature: 68.4 °F Dew Point: 65 °F Humidity: 90% Wind: SE at 2.7 mph Pressure: 29.26 in Hourly Precipitation: 0.04 in Heat Index: - Graphs

Location: Preiss Heights, New Braunfels, TX

Updated: 7:17 PM CST

Temperature: 67.0 °F Dew Point: 66 °F Humidity: 95% Wind: Calm Pressure: 29.96 in Hourly Precipitation: 0.02 in Heat Index: - Graphs

Location: Flying Horses Ranch, Buda, TX

Updated: 7:17 PM CST

Temperature: 68.4 °F Dew Point: 67 °F Humidity: 94% Wind: SE at 6.9 mph Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Canyon Falls RV Park, Canyon Lake, TX

Updated: 7:17 PM CST

Temperature: 67.6 °F Dew Point: 66 °F Humidity: 96% Wind: East at 3.1 mph Pressure: 29.94 in Hourly Precipitation: 0.17 in Heat Index: - Graphs

Location: Garlic Creek West, Buda, TX

Updated: 7:12 PM CST

Temperature: 68.3 °F Dew Point: 67 °F Humidity: 95% Wind: Calm Pressure: 29.96 in Hourly Precipitation: - Heat Index: - Graphs

Location: Garlic Creek, Buda, TX

Updated: 7:17 PM CST

Temperature: 68.2 °F Dew Point: 66 °F Humidity: 93% Wind: SSE at 6.8 mph Pressure: 29.94 in Hourly Precipitation: - Heat Index: - Graphs

Location: Dryden Lane, Buda, TX

Updated: 7:16 PM CST

Temperature: 68.9 °F Dew Point: 68 °F Humidity: 98% Wind: North at - Pressure: 30.07 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Oakwood Estates, New Braunfels, TX

Updated: 7:17 PM CST

Temperature: 68.0 °F Dew Point: 67 °F Humidity: 96% Wind: SE at 2.0 mph Pressure: 29.99 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: LCYC, Canyon Lake, TX

Updated: 7:17 PM CST

Temperature: 68.0 °F Dew Point: 66 °F Humidity: 92% Wind: SE at 14.0 mph Pressure: 29.97 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Turnersville, Buda, TX

Updated: 7:17 PM CST

Temperature: 68.2 °F Dew Point: 49 °F Humidity: 51% Wind: Calm Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: La Ventana, Driftwood, TX

Updated: 7:07 PM CST

Temperature: 67.4 °F Dew Point: 66 °F Humidity: 94% Wind: SSE at 4.0 mph Pressure: 29.96 in Hourly Precipitation: 0.02 in Heat Index: - Graphs

Location: Blanco River Estates, Wimberley, TX

Updated: 7:17 PM CST

Temperature: 67.5 °F Dew Point: 66 °F Humidity: 94% Wind: NNE at 1.0 mph Pressure: 30.00 in Hourly Precipitation: 0.09 in Heat Index: - Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Austin/San Antonio Texas 
620 PM CST Friday Nov 21 2014 


Update...update for 00z aviation below. 


&& 


Aviation...scattered rain showers and isolated thunderstorms ongoing at 00z along and 
east of a gtu to near Sat line. Activity will continue through 
03z. Additional rain showers and isolated thunderstorms possibly developing after 
03z and continuing overnight further west...between Sat-drt-jct. 
IFR/MVFR ceilings developing aus/Sat/ssf after 03z and MVFR at drt 
after 06z. Coverage of rain showers will increase 12z-18z across south- 
central Texas...with a few embedded thunderstorms and rain showers. Forcing increases 18z- 
00z with the approach of the upper level low...with numerous rain showers 
and embedded thunderstorms and rain showers developing...especially along and east of a 
jct-Sat line. Some strong to severe storms are possible... 
producing damaging winds and hail...in addition to a couple of 
tornadoes. Sat/aus/ssf tafs all indicate potential for +tsra after 
18z. 


&& 


Previous discussion... /issued 322 PM CST Friday Nov 21 2014/ 


Short term (tonight through Saturday night)... 
upper air analysis this morning showed an upper level trough 
moving through the Great Basin with nearly zonal flow across 
Texas. Water vapor satellite imagery shows the middle-levels are 
still quite dry...but moisture is approaching the region from the 
west. At the surface winds were from the southeast and dew point 
temperatures were generally from the upper 50s to middle 60s. Models 
are in good agreement on the upper trough swinging down into 
northern Mexico and then into West Texas. Overnight tonight 
southerly flow will continue as the upper trough approaches from 
the west. Chances for showers and thunderstorms will continue 
overnight. The upper trough will move across south central Texas 
Saturday. Model forecasts are showing conditions coming together 
with a chance for severe thunderstorms Saturday. This is looking 
like a Low Cape high shear environment. Model soundings are 
predicting cape generally around 1000j/kg or less with 40 to 50 
kts of 0-6km vertical wind shear. This should be sufficient to 
generate some severe thunderstorms. The best chance for storms 
should be during the afternoon and evening as the upper trough 
moves across the area. Most likely threat will be damaging winds 
and a few tornadoes with a lesser chance for large hail. Along 
with the severe threat forecast of precipitable water values has been increasing 
and is now 1.25 to 1.5 inches which for this time of year is 
sufficient for locally heavy rain. The locally heavy rain threat 
will be greatest over the eastern half of the County Warning Area. Rain chances 
will end quickly Saturday night as the upper trough axis moves to 
the east and a cold front moves through from the west. 


Long term (sunday through friday)... 
a broad trough will develop over the country and the flow over the 
Southern Plains will go from zonal to northwesterly. This will 
lead to a dry period through the end of the period. The low level 
flow will be varying through the week and never get established in 
any direction for a long time. So expecting no chance for rain and 
moderate temperatures through the week. 


&& 


Preliminary point temps/pops... 
Austin Camp Mabry 63 71 56 78 47 / 50 90 70 0 - 
Austin Bergstrom international Airport 62 72 53 78 45 / 50 90 70 0 - 
New Braunfels Muni Airport 63 74 55 78 46 / 60 90 60 0 - 
Burnet Muni Airport 61 68 52 75 43 / 60 90 60 0 - 
del Rio International Airport 62 74 50 77 47 / 40 50 10 0 0 
Georgetown Muni Airport 62 70 54 76 44 / 50 90 70 0 - 
Hondo Muni Airport 62 73 49 76 43 / 70 80 30 0 - 
San Marcos Muni Airport 63 72 54 79 45 / 50 90 70 0 - 
La Grange - Fayette regional 63 73 58 77 48 / 40 80 80 0 - 
San Antonio International Airport 64 74 56 78 48 / 70 90 50 0 - 
Stinson Muni Airport 65 75 55 79 48 / 70 90 50 0 - 


&& 


Ewx watches/warnings/advisories... 
none. 
&& 


$$ 


Mesoscale/aviation...76 
synoptic/grids...04 
public service/data collection...30 



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