Thursday, February21, 2019 L-36.com


Marine Weather and Tides
Castle Hills, TX

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:06AMSunset 6:28PM Thursday February 21, 2019 3:37 PM CST (21:37 UTC) Moonrise 9:01PMMoonset 8:46AM Illumination 94% Phase: Waning Gibbous; Moon at 17 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 211819 aaa
afdewx
area forecast discussion... Updated
national weather service austin san antonio tx
1219 pm cst Thu feb 21 2019

Update
Please see the 18z aviation forecast discussion below.

Aviation
Cigs are currentlyVFR across the region, but we are noticing a
decreasing trend in cloud bases this morning. Based on observational
trends and the hrrr forecast soundings, we will start MVFR cigs
around 20z along i-35, with CIGS expected to fall below 2k ft around
23z. CIGS continue to lower through the evening with ifr then
anticipated around 02z. Conditions continue to deteriorate with lifr
then setting in around 06z. We should also see widespread fog and
drizzle for the i-35 sites through tonight into Friday morning. Not
much improvement is expected through tomorrow morning and will
continue to mention either lifr or ifr through late morning. At drt,
it will take much longer for low clouds to develop and we will
mentionVFR through this afternoon and evening. We should then see
MVFR develop around 06z with ifr around 08z.

Prev discussion issued 330 am cst Thu feb 21 2019
short term (today through Friday)...

upper air analysis last evening showed a trough over the western us
with southwesterly flow over texas. At the surface, there was a
stationary front in the gulf nearly parallel to the texas coast. The
upper flow will remain southwesterly through this period as the
trough in the west moves slowly to the east. The frontal boundary in
the gulf will move back toward the coast today and back over texas
tonight. This will bring low chances for rain today across the
eastern part of the CWA and then better chances across most of the
area tonight. The boundary will move through our eastern area as a
warm front Friday with a continuing chance for rain and isolated
thunderstorms.

Long term (Friday night through Wednesday)...

the upper level trough will become more progressive Friday night and
move across new mexico and then across the panhandle Saturday and
then into the central plains. Beneath this trough a pacific frontal
system will through our CWA from the west. The cold front will reach
our eastern area by Saturday morning and move away from our region
during the day. The front will bring a chance for showers and
thunderstorms Friday night and early Saturday. Rain chances should
come to an end by around noon Saturday. Drier air will move in behind
the front bringing dry weather Sunday. Monday will be a transition
day with the low level flow turning from northerly to easterly. This
will increase low level moisture and there may be enough isentropic
lift to produce light rain especially across the eastern half of the
area Monday night and Tuesday. Wednesday another cold front will move
in from the north. Moisture will be limited as this front moves
through and there will only be a slight chance for rain.

Fire weather...

much drier air will move in behind the cold front Saturday with
strong northwesterly winds. Relative humidity Saturday afternoon will
drop below 30% over almost all of the area and below 20% across the
area west of san antonio. This combined with strong, gusty winds will
make for critical fire weather conditions for the area west of a
line from burnet to san antonio to pleasanton.

Preliminary point temps pops
Austin camp mabry 58 49 65 55 70 20 40 50 70 30
austin bergstrom intl airport 59 50 66 56 70 30 40 50 70 30
new braunfels muni airport 60 50 67 56 70 20 30 40 60 20
burnet muni airport 57 47 63 53 67 20 30 40 70 20
del rio intl airport 67 52 73 53 72 0 20 20 20 0
georgetown muni airport 56 48 62 54 68 30 30 50 70 30
hondo muni airport 64 52 71 57 70 10 30 40 50 10
san marcos muni airport 60 50 67 56 71 20 40 40 60 30
la grange - fayette regional 57 52 69 59 70 30 50 60 60 50
san antonio intl airport 61 51 68 57 70 10 30 40 60 20
stinson muni airport 62 52 69 58 71 10 30 40 50 20

Ewx watches warnings advisories
None.

Aviation... Platt
short-term long-term... Oaks
public service data collection... 33


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Antonio, San Antonio International Airport, TX4 mi47 minENE 910.00 miOvercast57°F46°F67%1010.6 hPa
Kelly Air Force Base, TX9 mi42 minNNE 1110.00 miMostly Cloudy59°F47°F65%1010.7 hPa
Randolph Air Force Base, TX13 mi42 minNNE 810.00 miOvercast57°F46°F68%1011.4 hPa
San Antonio, Stinson Municipal Airport, TX13 mi45 minNE 910.00 miOvercast59°F45°F60%1010.9 hPa
San Antonio Boerne Stage Field, TX17 mi63 minN 010.00 miOvercast54°F42°F67%1012.5 hPa
Castroville Municipal Airport, TX21 mi43 minE 910.00 miOvercast60°F43°F53%1011.5 hPa

Wind History from SAT (wind in knots)
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Last 24hr3E8E5E4E3E4E4CalmN3N4N3N3E3NE4NE3NE4N5NE5NE6E6NE6NE6NE6NE9
1 day agoN6N10NE7N10N10N10N8N9N7NW6NW5NW5W3CalmN4CalmCalm43Calm4NW6N11Calm
2 days agoE10
G18
NE10NE9NE9NE10NE13
G16
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G18
N10N8NE9N7NE11NE7NE10NE9N11NE9
G17
NE9N8N8NE9NE9N8NW8

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

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Austin/San Antonio, TX (16,3,4,5)
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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.