Tuesday, August11, 2020
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Marine Weather and Tides
China Grove, TX

Version 3.4
NOTICE
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 6:59AMSunset 8:19PM Tuesday August 11, 2020 2:22 PM CDT (19:22 UTC) Moonrise 12:00AMMoonset 1:01PM Illumination 47% Phase: Third Quarter Moon; Moon at 22 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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7 Day Forecast for Marine Location Near China Grove, TX
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location: 29.4, -98.4     debug


Area Discussion for - Austin/San Antonio, TX
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FXUS64 KEWX 111723 AFDEWX

Area Forecast Discussion National Weather Service Austin/San Antonio TX 1223 PM CDT Tue Aug 11 2020

AVIATION. The TAFs have become quite repetitive. VFR conditions will prevail at all airports through the afternoon and evening. Southerly to southeasterly winds will be 10 to 15 kts with gusts up to 25 kts through the afternoon. MVFR ceilings will develop in Austin and San Antonio overnight and return to VFR by late morning Wednesday.

PREV DISCUSSION. /ISSUED 403 AM CDT Tue Aug 11 2020/

SHORT TERM (Today through Wednesday) . Subtropical Ridging remains over Texas. Subsidence under the Ridge and moisture levels near seasonal levels indicate no rain for most of South Central Texas. The exception being near the Coastal Plains where slightly deeper moisture, slightly weaker subsidence, and heating allow for a few showers and thunderstorms mainly during the afternoon.

Thermal ridging maintains ongoing high and low temperatures. Near seasonal humidity levels are expected as dewpoints mix lower each afternoon resulting in heat index values only slightly warmer than actual temperatures. However, a few spots along and east of I-35 may have heat index values flirting with advisory levels of 108+ for an hour or two. Fortunately, a stronger surface pressure gradient will bring breezy and gusty winds during the afternoon into evening hours to take the edge off the heat.

LONG TERM (Wednesday Night through Monday) . High pressure in the mid and upper levels of the atmosphere will remain anchored over the desert southwest through the remainder of this week. As we head into early next week, the ridge continues to strengthen and will move northward. There are some model differences noted with the GFS showing more northwesterly flow aloft vs. the ECMWF keeping the flow north or northeast.

We will continue to keep temperatures above normal through the period and have gone with more of a persistence forecast as guidance continues to look a little low in a few spots. The only mention of precipitation through the end of this week will remain confined to portions of the coastal plains and Highway 77 corridor, where some isolated afternoon showers and storms remain possible. For early next week, a change in the pattern could allow for some isolated showers and storms to develop a little farther northward into the I-35 corridor and Hill Country. However, given the disagreement among the medium range models, we will keep rain chances low at this time. Temperatures may ease slightly early next week, but will continue to remain above climatological normals.

PRELIMINARY POINT TEMPS/POPS. Austin Camp Mabry 78 101 78 104 76 / 0 0 0 0 0 Austin Bergstrom Intl Airport 77 100 77 100 75 / 0 0 0 0 0 New Braunfels Muni Airport 77 100 76 102 75 / 0 0 0 0 0 Burnet Muni Airport 76 99 75 101 74 / 0 0 0 0 0 Del Rio Intl Airport 80 104 80 104 78 / 0 0 0 0 0 Georgetown Muni Airport 79 100 78 102 76 / 0 0 0 0 0 Hondo Muni Airport 76 100 76 103 75 / 0 0 0 0 0 San Marcos Muni Airport 77 100 76 102 75 / 0 0 0 0 0 La Grange - Fayette Regional 79 99 78 100 76 / - - 0 - 0 San Antonio Intl Airport 79 100 78 102 76 / 0 0 0 0 0 Stinson Muni Airport 78 101 78 101 76 / 0 0 0 0 0

EWX WATCHES/WARNINGS/ADVISORIES. None.

Short-Term/Aviation . 05 Long-Term . Oaks Decision Support . KCW


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Antonio, Stinson Municipal Airport, TX6 mi30 minS 10 G 1610.00 miPartly Cloudy93°F69°F46%1012.6 hPa
San Antonio, San Antonio International Airport, TX10 mi32 minSSE 5 G 1710.00 miPartly Cloudy95°F68°F41%1013 hPa
San Antonio - Kelly Field, TX10 mi27 minSSE 13 G 1610.00 miA Few Clouds97°F67°F39%1013.3 hPa
Randolph Air Force Base, TX12 mi27 minSW 810.00 miA Few Clouds96°F67°F39%1013.9 hPa
Castroville Municipal Airport, TX24 mi48 minS 4 G 1410.00 miPartly Cloudy96°F64°F35%1015.6 hPa

Link to 5 minute data for KSSF

Wind History from SSF (wind in knots)
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Last 24hrS12
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1 day agoS12
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2 days ago--SE11
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Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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wmap_A
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 (15,3,4,5)
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Ground Weather Radar Station Austin/San Antonio, TX
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weather_mapweather_map weather_map

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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.