Friday, August23, 2019 L-36.com


Marine Weather and Tides
Castle Hills, TX

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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 7:05AMSunset 8:07PM Friday August 23, 2019 7:53 PM CDT (00:53 UTC) Moonrise 12:00AMMoonset 1:11PM Illumination 40% Phase: Third Quarter Moon; Moon at 23 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 Castle Hills, TX
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location: 29.51, -98.53     debug


Area Discussion for - Austin/San Antonio, TX
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Fxus64 kewx 232353
afdewx
area forecast discussion
national weather service austin san antonio tx
653 pm cdt Fri aug 23 2019

Update
00z aviation forecast below.

Aviation
Isolated to scattered shras and tsras ongoing across portions of
south central texas this evening. Activity near and east of the i-35
corridor should diminish after sunset. Convection across portions of
the hill country and near the rio grande could persist longer into
the evening, before diminishing overnight. A few storms could produce
gusty winds. In addition, outflow from earlier storms, combined with
the sea-breeze boundary, is racing inland and producing strong wind
gusts at aus, hyi, and baz and should arrive at Sat very shortly.

Wind gusts between 25-40 kts have been recorded with this boundary.

Outside of convectionVFR conditions will prevail through the evening
and most of the overnight. A small area of MVFR ceilings may occur
between 09z-15z near the i-35 corridor.

Prev discussion issued 250 pm cdt Fri aug 23 2019
short term (tonight through Saturday night)...

early afternoon water vapor imagery showed a few larger scale
features around the continental us with a compact upper low spinning
over montana, wyoming, and idaho and a shortwave trough axis located
over the northwestern gulf of mexico. Additionally, regional vad
wind profilers indicate that the mid-level trough that was evident
over west central texas on this morning's radiosonde observations is
still lingering over west central texas. Visible satellite imagery
has shown an enhancement in the cumulus field in the vicinity of this
feature. Continued heating combined with weak lift from this trough
and residual surface boundaries from last night's thunderstorms will
allow for deeper updrafts to develop through the remainder of the
afternoon hours and into the early evening. This will result in rain
chances focusing in two areas this afternoon: the hill country and
parts of the rio grande plains, which are closer to the trough, as
well as the coastal plains as the sea breeze moves inland. Surface
dew point depressions around the region are close to 25 to 30 degrees
this afternoon and this relatively dry sub-cloud airmass will mean
that any strong thunderstorm will be capable of a gusty wind threat.

Goes total precipitable water satellite imagery shows that
precipitable water values range from 1.6 to 1.9 inches across the
region this afternoon in a weakly sheared environment and
thunderstorms will also be slow-moving and capable of locally heavy
rain.

Regional radars shows a southward-moving outflow boundary nearing
the interstate 20 corridor as well, which a few hrrr runs have
indicated may reach central texas before midnight tonight. Only
carrying a silent 10 percent chance of rain for this feature, but a
mid-evening update to increase rain chances for the central texas
counties may be needed should it hold together. Otherwise, storms
may linger into the the early morning hours across val verde county
given the proximity of the mid-level trough with a few streamer type
showers edging into the coastal plains by dawn. Redevelopment of
nocturnal stratus will again keep overnight lows elevated in the low
to mid 70s.

Broad mid upper-level ridging spreads across california into the
desert southwest tonight as the weak mid-level trough axis remains
centered over texas. As the closed low near montana opens up and
crosses the central plains during the day Saturday, the weakness over
texas gets pushed east of the region and and allows for ridging to
begin spreading back into the state Saturday night. This will mean
that isolated to scattered showers and thunderstorms will be possible
across most of the region during the late morning through early
evening hours on Saturday as convective temperatures are reached,
with greatest coverage along mesoscale boundaries either leftover
from storm's today or the sea breeze. Forecast soundings continue to
indicate an inverted-v profile, indicating stronger cells on Saturday
will once again be capable of gusty winds. While a few storms may
linger into the evening hours Saturday across the rio grande plains,
loss of heating will allow for most activity to dissipate with lows
again in the low to mid 70s.

Long term (Sunday through Friday)...

with mid-level ridging building back into the region on Sunday,
temperatures will gradually get hotter Sunday through the mid-week
period. This will also suppress rain chances across most of the
region save for the sea breeze as it reaches the coastal plains. A
series of troughs crossing the central plains late week may attempt
to send a cold front into north texas by late in the forecast, but
inconsistencies amongst medium range guidance precludes introducing
any kind of significant changes to the temperature or rain forecast
late week.

Preliminary point temps pops
Austin camp mabry 77 97 78 99 78 20 20 10 20 10
austin bergstrom intl airport 75 95 77 98 78 20 20 10 20 10
new braunfels muni airport 75 95 76 98 77 20 20 10 20 10
burnet muni airport 74 95 75 98 76 20 20 10 20 10
del rio intl airport 78 98 78 102 79 20 30 20 10 0
georgetown muni airport 76 97 77 99 78 20 20 10 20 10
hondo muni airport 76 99 76 100 77 10 30 20 20 10
san marcos muni airport 75 96 76 98 77 20 20 10 20 10
la grange - fayette regional 76 97 77 98 78 20 30 10 30 10
san antonio intl airport 77 97 78 98 79 20 20 10 20 10
stinson muni airport 77 97 78 98 79 20 20 10 20 10

Ewx watches warnings advisories
None.

Aviation... Runyen
short-term long-term... Zeitler


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Antonio, San Antonio International Airport, TX4 mi63 minE 1210.00 miMostly Cloudy96°F64°F36%1007.1 hPa
San Antonio - Kelly Field, TX9 mi58 minESE 1010.00 miFair97°F65°F36%1007.5 hPa
Randolph Air Force Base, TX13 mi2 hrsESE 510.00 miFair98°F66°F36%1008.5 hPa
San Antonio, Stinson Municipal Airport, TX13 mi61 minESE 1310.00 miA Few Clouds99°F66°F35%1006.4 hPa
San Antonio Boerne Stage Field, TX17 mi79 minSE 610.00 miFair90°F62°F41%1011.2 hPa
Castroville Municipal Airport, TX21 mi79 minESE 7 G 1610.00 miFair97°F60°F30%1009.5 hPa

Link to 5 minute data for KSAT

Wind History from SAT (wind in knots)
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Last 24hrE11SE11------------SE6--SE8S7SE4S4SW7S5SW853SE85SE10
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1 day agoSE15SE14----S14--------SE4S7SE9S7S95SE7SE8SE11
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2 days agoSE8----SE10------------S6S8----S9SW7SE9534S7S10E7SE13

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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GOES 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

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Wind Forecast for Austin/San Antonio, TX (20,4,5,8)
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Ground Weather Radar Station Austin/San Antonio, TX
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Disclaimer:
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 numerious 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.