Marine Weather and Tides
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.
|Sunrise 6:41AM||Sunset 8:37PM||Sunday July 12, 2020 5:33 PM CDT (22:33 UTC)||Moonrise 12:05AM||Moonset 12:31PM||Illumination 50%|
7 Day Forecast for Marine Location Near Terrell Hills, TXHourly EDIT Help
Area Discussion for - Austin/San Antonio, TX  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS64 KEWX 121951 AFDEWX
Area Forecast Discussion National Weather Service Austin/San Antonio TX 251 PM CDT Sun Jul 12 2020
SHORT TERM (Tonight through Monday Night). As discussed in the morning update, the morning cirrus debris, slightly higher dew points, and temporary northeast wind shift that occurred in the northern CWA, stunted temperature trends across some portions of central and eastern areas of the CWA. We are finally seeing a rebound mid afternoon, although dew points are still elevated. We should see a record high temperature for this date later at Del Rio and possible San Antonio.
Continued hot and dry conditions through the short term as the strong 595 decameter 500mb ridge remains centered just northwest of the region. For several runs models it has been indicated that Monday would eventually be the warmest day of this heat event for many areas, and the 12Z runs have not changed. 850mb temps and 1000- 500mb thickness values look to peak over the region tomorrow. We have followed closer to the NBM for max temperatures for Monday, which has been, for our region at least, the better model guidance, especially for those drought stressed areas. The two things to watch carefully, that might keep temperatures slightly cooler than advertised, would be potential cirrus debris with any upstream convection again overnight and dew points not mixing out as low as advertised.
With that said, we are forecasting record heat for the date tomorrow for most areas. Locations along the Rio Grande, like Del Rio, could make a run for all time max temperature records. While technically not meeting Excessive Heat Warning criteria for western areas, we have elected to expand the Excessive Heat Warning southwest into the Rio Grande region for Monday. We have also expanded into the Hill Country as some locations could be at criteria. This should help with messaging Monday being the peek of the heat, for some locations near or at July record highs, and for Del Rio possibly near or at and all time record high (112 in 1988).
The message for all of South-Central Texas, regardless of in a Heat Advisory or Excessive Heat Warning, will continue to be that dangerous heat is occurring which could cause heat related illness for those not taking proper precautions highlighted below.
Heat Messaging: - Stay hydrated and take frequent breaks in the shade or air conditioning - Limit strenuous outdoor activities - Check on elderly and those without air conditioning - Never leave children or pets unattended in vehicles
CLIMATE. Daily Max Temperature Records . Jul 12 . Jul 13 . Jul 14 Austin . 107 (1954) .105 (2013). 108 (1925) Austin/Bergstrom . 106 (1954) .104 (2013). 105 (2000) San Antonio . 103 (1988) .102 (2013). 102 (2009) Del Rio . 107 (1998) .106 (1998). 107 (1998)
July Max Temperature Records Austin . 110 (2018) Austin/Bergstrom . 109 (2018) San Antonio . 106 (1989) Del Rio . 111 (1960)
LONG TERM (Tuesday through Sunday). High pressure ridge is forecast to dominate the weather forecast conditions through the extended forecast period. For sure, the two weather conditions that will persist for this time frame is the heat and a dry pattern. Dangerous heat weather conditions are expected once again on Tuesday with high temperatures reaching the 100 to 110 degree mark and similar values for the heat indices. It is likely that most areas across South Central Texas ends up under a Heat Advisory with portions of the area under an Excessive Heat Warning. All this to say that it is going to be hot everywhere across the local area. The heat safety message continues and that is to protect yourself and others from the impacts of this heat wave by staying hydrated and take frequent breaks in the shade or air conditioning if you are conducting any activity outdoors. For more details on this, please check our homepage at weather.gov/ewx.
By Wednesday, the heat relaxes a bit (we are referring 1 to 5 degrees for most places versus the Tuesday's highs) as the high pressure ridge weakens with the passage of an upper short wave disturbance across north Texas. The pattern changes very little on Thursday and therefore, similar conditions are expected with highs in the upper 90s and up to 103 degrees along the Rio Grande.
By Friday, the high pressure ridge continues to weaken as the center of the system moves over the Texas Panhandle and an upper level inverted short wave travels from east to west across the coastal plains. This translates to similar conditions to the those expected on Thursday with even a degree or two cooler over some areas.
Not a whole lot of changes for the upcoming weekend as the high pressure ridge still in control over the local weather with very little opportunity to see rain and elevated chances for the heat wave to remain.
PRELIMINARY POINT TEMPS/POPS. Austin Camp Mabry 79 106 77 103 76 / 0 0 0 0 0 Austin Bergstrom Intl Airport 76 105 76 103 76 / 0 0 0 0 0 New Braunfels Muni Airport 75 106 74 103 75 / 0 0 0 0 0 Burnet Muni Airport 75 104 76 103 74 / 0 0 0 0 0 Del Rio Intl Airport 81 111 81 111 79 / 0 0 0 0 0 Georgetown Muni Airport 77 105 76 104 76 / 0 0 0 0 0 Hondo Muni Airport 74 107 75 107 75 / 0 0 0 0 0 San Marcos Muni Airport 75 106 75 104 75 / 0 0 0 0 0 La Grange - Fayette Regional 77 104 77 104 78 / 0 0 0 0 0 San Antonio Intl Airport 78 106 77 105 76 / 0 0 0 0 0 Stinson Muni Airport 76 106 76 105 76 / 0 0 0 0 0
EWX WATCHES/WARNINGS/ADVISORIES. Excessive Heat Warning until 8 PM CDT Monday for Atascosa-Bandera- Bastrop-Bexar-Blanco-Burnet-Caldwell-Comal-Dimmit-Edwards-Frio- Gillespie-Gonzales-Guadalupe-Hays-Karnes-Kendall-Kerr-Kinney-Llano- Maverick-Medina-Real-Travis-Uvalde-Val Verde-Williamson-Wilson- Zavala.
Heat Advisory until 8 PM CDT Monday for De Witt-Fayette-Lavaca-Lee.
Short-Term/Aviation . Runyen Long-Term . 17 Decision Support . KCW
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||6 mi||43 min||SE 5||10.00 mi||A Few Clouds||100°F||64°F||32%||1010 hPa|
|San Antonio - Kelly Field, TX||8 mi||38 min||SSW 3||10.00 mi||Partly Cloudy||101°F||65°F||31%||1010.2 hPa|
|San Antonio, Stinson Municipal Airport, TX||9 mi||41 min||SSE 6||10.00 mi||Fair||100°F||64°F||31%||1009.3 hPa|
|Randolph Air Force Base, TX||11 mi||38 min||S 7||10.00 mi||Fair||101°F||63°F||29%||1010.5 hPa|
|Castroville Municipal Airport, TX||22 mi||59 min||N 0||10.00 mi||Fair||103°F||58°F||23%||1012.5 hPa|
|San Antonio Boerne Stage Field, TX||22 mi||39 min||SSW 4||10.00 mi||Fair||97°F||55°F||25%||1013.5 hPa|
Link to 5 minute data for KSAT
Wind History from SAT (wind in knots)
|1 day ago||S||SE||SE|
|2 days ago||SE|
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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 (18,4,5,8)(on/off)  Help
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