Tuesday, June18, 2019 L-36.com


Marine Weather and Tides
Weir, TX

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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 6:26AMSunset 8:37PM Tuesday June 18, 2019 6:59 PM CDT (23:59 UTC) Moonrise 8:58PMMoonset 6:34AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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 Weir, TX
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location: 30.67, -97.6     debug


Area Discussion for - Austin/San Antonio, TX
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Fxus64 kewx 182346
afdewx
area forecast discussion
national weather service austin san antonio tx
646 pm cdt Tue jun 18 2019

Aviation
Isold-sct shra tsra currently over the pecos valley to the big bend
to davis mountains areas will move toward the east over the edwards
plateau this evening, then gradually dissipate over the hill country
later this evening, possibly central texas overnight. Have mentioned
vcsh for kdrt where the best chances are. Will monitor trends for
possible updates for tsra at kdrt this evening and shra tsra at kaus
overnight. For kdrt, shra tsra over the edwards plateau will bring
low endVFR CIGS and vrbl winds around 5 kts, possible gusts to 25
kts, this evening, then SE winds 5 to 10 kts return withVFR skies
prevailing Wednesday. At ksat kssf kaus,VFR skies prevail this
evening with S winds 5 to 10 kts. Ifr CIGS develop overnight, then
rise to MVFR as low level jet strengthens. CIGS mix out to few-sct
vfr clouds with S winds 10 to 15 kts with occasional gusts to 25 kts
on Wednesday.

Prev discussion issued 301 pm cdt Tue jun 18 2019
short term (tonight through Wednesday night)...

despite the presence of broad, mid to upper level ridging across the
southern half of texas today, a gravity wave from overnight
convection across the permian basin and low rolling plains allowed
for a thunderstorm complex to propagate into the brazos valley
earlier today. Remnants of an outflow boundary associated with these
storms were evident on visible satellite imagery along a
mason dripping springs giddings line early this afternoon and will be
watching for isolated late afternoon shower development along this
feature as it lingers across the region. Anvil debris slowed
modification of the post-boundary airmass earlier today (allowing for
the boundary to linger and drive farther to the south and east), but
clearing skies have allowed for temperatures behind the boundary to
spring back into the mid 80s and additional insolation should allow
for this boundary to wash out by this evening.

Farther to the west, a 50-70 knot upper level speed maxima straddling
the big bend was allowing for isolated to scattered showers to linger
across val verde county. This has produced persistent scattered
cloud debris across the southern half of the county and has limited
overall convective intensity today. With little overall change in the
pattern across the state, expect similar storm trends tonight with
some of the activity across the davis mountains and big bend making a
run for val verde this evening. The aforementioned stability will
likely limit how far east these storms are able to make it, but will
also be watching areas farther north tonight where a surface trough
across the low rolling plains may serve as a focus for another
nocturnal thunderstorm complex that makes a run for the region.

Higher resolution guidance like the hrrr and nssl-wrf try to keep
this complex north of the region and take it into north texas, but
corfidi vectors are oriented more northwesterly and indicate that
portions of central texas may again be clipped by a morning complex
should it hold together. (corfidi vectors can be used to anticipate
surface based mesoscale convective systems based on the
strength direction of the low level jet, orientation of cold pool
relative flow, as well as instability present ahead of the system.)
have added some low rain chances (20 10 pops) to central texas for
the early morning and morning hours to account for this potential.

Otherwise, expect another warm night for the region with lows in the
70s. Have held off on including a patchy fog mention at this time
with at least a weak low level jet in place tonight, but areas east
of a fredericksburg to gonzales line will need to be monitored for
potential fog development.

Ridging becomes more zonal on Wednesday as a shortwave drops into
the southern plains from colorado and this will help veer 850-700 mb
flow, resulting in temperatures skyrocketing to the mid 90s to low
100s across the region by Wednesday afternoon. Only modest mixing
during the afternoon hours will mean hot and humid conditions produce
heat index values in the 102 to 110 degree range and a heat advisory
may be needed for areas east of interstate 35. Associated capping
from this veered low-mid level flow should limit overall rain
chances but will need to watch what appears to be a weak cold front
(or possible outflow from storms over oklahoma tonight) sliding into
west central texas for possible shower or thunderstorm development.

Little relief from the heat is expected Wednesday night with lows in
the mid 70s to lower 80s.

Long term (Thursday through Tuesday)...

zonal flow aloft persists through Thursday, but becomes
southwesterly and amplifies Friday and Saturday as longwave troughing
becomes established across the western conus. The thermal ridge
associated with the veered low level flow appears to be the strongest
on Thursday and have maintained advertising widespread 100-105 degree
temperatures. A heat advisory is also possible again on Thursday. As
upper level flow becomes more southwesterly, this will help back
lower level flow, moderating high temperatures a few degrees (highs
in the mid 90s this weekend as opposed to the ground scorching 100+
during the mid- week period) and allow for isolated to scattered
thunderstorm changes to enter into the forecast as embedded
disturbances in the flow aloft translate near the region. As the
upper trough axis begins to slide east early next week, rain chances
look to translate east of the region sometime around or after
Tuesday.

Preliminary point temps pops
Austin camp mabry 76 98 77 100 77 20 10 - 0 0
austin bergstrom intl airport 76 98 77 100 77 20 10 - 0 0
new braunfels muni airport 75 99 76 101 75 - 10 - 0 0
burnet muni airport 75 97 76 99 75 20 10 - 0 -
del rio intl airport 77 100 77 104 77 10 10 10 0 -
georgetown muni airport 75 98 77 100 76 20 10 - 0 0
hondo muni airport 76 102 77 104 76 - 10 - 0 -
san marcos muni airport 75 99 76 101 76 - 10 - 0 0
la grange - fayette regional 77 98 78 99 78 20 10 - - 0
san antonio intl airport 76 100 77 102 77 - 10 - 0 0
stinson muni airport 77 100 78 103 77 - 10 - 0 0

Ewx watches warnings advisories
None.

Aviation... 04
short-term long-term... Treadway
public service data collection... 33


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Georgetown, Georgetown Municipal Airport, TX5 mi63 minSSE 510.00 miPartly Cloudy92°F72°F52%1010.7 hPa
Austin Executive Airport, TX19 mi64 minS 610.00 miFair91°F71°F52%1011.2 hPa
Lago Vista TX, Rusty Allen Airport, TX23 mi84 minS 610.00 miFair91°F69°F49%1012.2 hPa

Wind History from GTU (wind in knots)
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Last 24hrE6E4CalmCalmCalmCalmN3CalmCalmCalmCalmCalmCalmCalm--NW9CalmS11
G16
SE7S8SW7SW6
G14
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1 day agoSE10SE8E11
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NE7N9--S10
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N16NE6S5S11S6SE4NE4N3E8NE6E6SE3SW4CalmS4CalmN5
2 days agoSE15
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S12S14S17
G22
SW13S12
G18
S12

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.
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Wind Forecast for Austin/San Antonio, TX (19,4,5,8)
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Ground Weather Radar Station Central Texas
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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.