Marine Weather and Tides
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen
|Sunrise 7:15AM||Sunset 5:36PM||Monday December 9, 2019 10:33 AM CST (16:33 UTC)||Moonrise 4:04PM||Moonset 4:41AM||Illumination 95%|
7 Day Forecast for Marine Location Near Castle Hills, TXHourly EDIT Help
Area Discussion for - Austin/San Antonio, TX  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS64 KEWX 091212 AAA AFDEWX
Area Forecast Discussion . UPDATED National Weather Service Austin/San Antonio TX 612 AM CST Mon Dec 9 2019
UPDATE. A Dense Fog Advisory has been issued for portions of south central Texas until 10 AM CST. The Advisory area does cover Hondo, San Antonio, New Braunfels and San Marcos. We will continue to monitor the fog and will add additional counties if needed.
PREV DISCUSSION. /ISSUED 529 AM CST Mon Dec 9 2019/
AVIATION . LIFR ceilings have developed along with areas of dense fog for the I-35 sites. Low stratus and fog are expected to gradually erode by 15-18Z Mon, brief MVFR ceilings, then VFR conditions for the afternoon. Cold front will move over the area Monday night, reaching AUS/DRT around 03Z Tue and SAT/SSF 05Z Tue. VCSH for frontal passage and continues through the remainder of the period.
PREV DISCUSSION . /ISSUED 401 AM CST Mon Dec 9 2019/
SHORT TERM (Today through Tuesday) . Surface observations from early this morning show fog is developing generally along and east of the I-35 corridor. Some locally dense fog can not be ruled out this morning and we will continue to monitor trends. With winds being lighter along and south of the Highway 90 corridor, the lower visibilities should be favored from the San Antonio area east and south into the coastal plains. However, we are seeing plenty of mid and high level cloud cover move in from the west. This along with some stronger winds just above the surface will tend to disrupt widespread dense fog development. Once the fog burns off by late morning, we expect a warm day across south central Texas with highs in the mid 70s to lower 80s. Some records may be met or exceeded, with our current forecast showing records being tied at Austin Bergstrom and Austin Mabry, with Del Rio expected to break the current record high. Please see the below Climate section for more information.
We still expect a significant change in the weather tonight as a strong cold front moves through the region. With warm air advection above the shallow cold air mass, light rain is expected to develop this evening, then increase overnight as the cold air deepens. Rain chances on Tuesday remain high through the morning hours, but will decrease from west to east in the afternoon as the warm air advection pattern begins to shut off. Average rainfall amounts tonight through Tuesday are still expected to remain near or below 1/4".
LONG TERM (Tuesday Night through Sunday) . Cool and dry weather can be expected Tuesday night through Thursday with surface high pressure generally in control of our weather. Overnight lows are expected to drop to at or below freezing for the Hill Country and adjacent I-35 corridor north of San Antonio Tuesday night/Wednesday morning and again Wednesday night/Thursday morning. We will see another upper level system move in from the west late Thursday, but the models continue to remain in some disagreement on the path of this upper trough. As of now, it does not appear we will see any rain chances with this next upper system and will keep the forecast dry through the end of the work week.
Temperatures will warm Friday through Sunday with dry and stable westerly flow aloft over the region. Highs will return to the 60s and 70s with lows in the 40s and 50s.
CLIMATE . DECEMBER 9 Location Record High (Year) Austin Bergstrom 81 (2008) Austin Camp Mabry 81 (2008) San Antonio 85 (2008) Del Rio 80 (2004)
PRELIMINARY POINT TEMPS/POPS. Austin Camp Mabry 81 42 46 33 56 / 0 70 90 - - Austin Bergstrom Intl Airport 81 42 45 31 57 / 0 70 90 - - New Braunfels Muni Airport 79 43 47 32 57 / 0 70 90 - - Burnet Muni Airport 79 39 44 29 54 / 0 80 100 - - Del Rio Intl Airport 81 49 54 37 59 / 0 70 60 0 0 Georgetown Muni Airport 81 40 44 30 55 / 0 80 100 - - Hondo Muni Airport 81 46 53 32 60 / 0 70 70 - - San Marcos Muni Airport 80 43 47 31 57 / 0 70 90 - - La Grange - Fayette Regional 81 44 48 34 56 / 0 80 90 10 10 San Antonio Intl Airport 78 45 48 34 57 / 0 70 80 - 10 Stinson Muni Airport 80 47 50 35 58 / 0 70 80 - 10
EWX WATCHES/WARNINGS/ADVISORIES. Dense Fog Advisory until 10 AM CST this morning for Atascosa-Bexar- Caldwell-Comal-Frio-Guadalupe-Hays-Medina-Wilson.
Aviation . EWilliams Short-Term/Long-Term . Platt
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|San Antonio, San Antonio International Airport, TX||4 mi||42 min||N 0||0.50 mi||Fog||65°F||63°F||93%||1010.9 hPa|
|San Antonio - Kelly Field, TX||9 mi||97 min||NW 3||3.00 mi||Fog/Mist||64°F||64°F||100%||1011.2 hPa|
|Randolph Air Force Base, TX||13 mi||97 min||N 0||1.00 mi||Fog/Mist||65°F||65°F||100%||1011.9 hPa|
|San Antonio, Stinson Municipal Airport, TX||13 mi||40 min||N 0||1.25 mi||Fog/Mist||64°F||64°F||100%||1010.9 hPa|
|San Antonio Boerne Stage Field, TX||17 mi||58 min||N 0||2.50 mi||Overcast||61°F||60°F||100%||0 hPa|
|Castroville Municipal Airport, TX||21 mi||58 min||NE 3||1.75 mi||Fog/Mist||63°F||63°F||100%||1012.5 hPa|
Link to 5 minute data for KSAT
Wind History from SAT (wind in knots)
|1 day ago||NE||Calm||Calm||S||Calm||SE||SE||Calm||Calm||Calm||Calm||NW||Calm||Calm||N||NW||Calm||Calm||Calm||NW||NW||S||SW|
|2 days ago||N|
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GEOS Local Image of EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Austin/San Antonio, TX (11,2,3,4)(on/off)  Help
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