Monday, March27, 2017 L-36.com


Marine Weather and Tides
Castle Hills, TX

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:26AMSunset 7:51PM Monday March 27, 2017 7:43 AM CDT (12:43 UTC) Moonrise 6:19AMMoonset 6:38PM Illumination 0% Phase: New Moon; Moon at 29 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 271143
afdewx
area forecast discussion
national weather service austin/san antonio tx
643 am cdt Mon mar 27 2017

Aviation /12z tafs/
weak cold front will stall out just as surface winds are able to
become shifty at drt by midday, and the front is not expected to
reach the i-35 terminals. A weak surface pressure gradient had led to
plenty of breaks in the low clouds which has allowed for patchy fog
to form. For the most part a few hours of ifr CIGS are expected at
each TAF site before mixing out toVFR. An approaching storm system
will increase southeasterlies and make low cloud formation more
uniform for the area tonight. Will keep lowest CIGS as ifr for late
tonight as the LLJ should be much more active.

Prev discussion /issued 445 am cdt Mon mar 27 2017/
short term (today through Tuesday)...

isolated strong to severe over central texas have finally dissipated.

This has left a weak outflow boundary and resulted in some decrease
in stratus that has allowed patchy fog to form in spots in the hill
country to along northern parts of the i-35 corridor. This fog should
lift in the next few hours. A weak cold front moves into the hill
country and central texas this morning, and then stalls across those
same areas this afternoon. Well above normal temperatures are again
expected with some compressional heating close to the front. Hi-res
models show isolated storms over southeastern parts of the hill
country late this afternoon into evening due to moisture convergence
near front and some upslope flow. For now, will only go with silent
10s for pops as deeper moisture is lacking. The front lifts back to
the north later this evening as an upper level trough currently
along the west coast approaches the four corners region overnight.

Weak upward forcing develops across the edwards plateau by morning
and could see some patchy drizzle or light showers there. Stronger
upward forcing develops on Tuesday as the upper level trough moves
across the southern rockies with an approaching left exit region of
the upper level jet. Showers and possibly thunderstorms slowly
develop during the day with better chances in the afternoon. Could
see some strong to perhaps severe storms come off the serranias del
burro or along the lower pecos valley toward evening due to mlcapes
of 1500 j/kg. Increased cloud cover leads to a decrease in high
temperatures, though still above normal.

Long term (Tuesday night through Sunday)...

the upper level trough moves out into the central/southern plains
Tuesday night into Wednesday. Strong upward forcing in expected due
to diffluence aloft from the upper level jet and convergence along
the dryline. High coverage of showers and thunderstorms is expected.

Mlcapes of 1500 to 2500 j/kg and sfc-6km shear of 35 to 50 kts
indicate strong to severe storms are possible with the full variety
of severe modes of large hail, damaging winds, and isolated tornadoes
expected. In addition, pws of 1.4 to 1.7 inches indicate a potential
for locally heavy rains. The showers and thunderstorms will shift and
end from west to east as the dryline pushes east with dry slotting.

A lull is expected late Wednesday afternoon into early evening. A
shortwave rotates through the base of the trough along with a weak
cold front. These may allow for showers and thunderstorms late
evening into the overnight. Drier conditions filter in on Thursday
with fair weather through Friday. Another upper level trough and cold
front move across texas this weekend. Chances of showers and
thunderstorms return to the forecast. Models have some disagreement
on track of the system. However, enough details are similar that some
strong to severe storms are again possible along with some locally
heavy rains.

Preliminary point temps/pops
Austin camp mabry 87 67 85 67 83 / - - 20 60 70
austin bergstrom intl airport 87 66 85 66 81 / - - 20 60 80
new braunfels muni airport 87 67 85 67 84 / - - 20 60 60
burnet muni airport 84 65 80 62 81 / - - 30 70 50
del rio intl airport 91 67 87 59 88 / - - 40 50 -
georgetown muni airport 85 65 83 63 80 / - - 20 60 70
hondo muni airport 89 67 82 64 87 / - - 30 60 40
san marcos muni airport 87 66 84 67 83 / - - 20 60 70
la grange - fayette regional 86 68 85 70 79 / - - 10 30 80
san antonio intl airport 87 68 82 66 85 / - - 20 60 50
stinson muni airport 90 68 85 67 85 / - - 20 50 50

Ewx watches/warnings/advisories
None.

Mesoscale/aviation... Oaks
synoptic/grids... 04


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Antonio, San Antonio International Airport, TX4 mi52 minSE 58.00 miOvercast68°F66°F93%1009.4 hPa
Kelly Air Force Base, TX9 mi45 minN 07.00 miFair67°F66°F96%1009.8 hPa
San Antonio, Stinson Municipal Airport, TX13 mi50 minE 410.00 miOvercast71°F66°F84%1009.3 hPa
Randolph Air Force Base, TX13 mi1.8 hrsSSE 53.00 miFog/Mist67°F67°F100%1009.7 hPa
San Antonio Boerne Stage Field, TX17 mi68 minS 4 miMostly Cloudy66°F64°F94%1011.8 hPa
Castroville Municipal Airport, TX21 mi68 minESE 37.00 miOvercast69°F68°F95%1011.5 hPa

Wind History from SAT (wind in knots)
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Last 24hrSE11S10S14SE12S15S11S14
G21
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S11SE14
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SE14SE13SE12S12S9S13S9SE6SE6SE7SE5
1 day agoNW7N12N116N5CalmCalmCalmSW54SW10SW9S6S8S8S6SE5S9SE9S9SE5SE5SE4SE6
2 days agoS8S10S6S7
G14
S10S12S8S7S8
G16
S11SW15SW14SW6SW4NW5NW4NW4NW5CalmN14NW5NW4NW7N8

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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Weather Map
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IR Satellite Image from GEOS
east_satellite

GOES Local Image of SouthCentralPlains    EDIT
Geos

Wind Forecast for Austin/San Antonio, TX (8,2,3,4)
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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.