Thursday, February22, 2018 L-36.com


Marine Weather and Tides
Volente, TX

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 7:02AMSunset 6:26PM Thursday February 22, 2018 5:00 AM CST (11:00 UTC) Moonrise 11:28AMMoonset 12:07AM Illumination 46% Phase: First Quarter Moon; Moon at 7 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 Volente, TX
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location: 30.43, -97.91     debug


Area Discussion for - Austin/San Antonio, TX
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Fxus64 kewx 221018
afdewx
area forecast discussion
national weather service austin san antonio tx
418 am cst Thu feb 22 2018

Short term (today through Friday)
As of 330am, isolated to scattered showers were developing across
much of the CWA and temperatures ranged from around freezing in the
northernmost parts of burnet, williamson, edwards, gillespie, and
llano counties. Some low lying areas measured by lcra temperature
gauges have dipped into the upper 20s in these areas as well.

The primary concern is in the pre-1st period this morning as these
freezing or below temperatures interact with the light showers
developing. Just about all guidance keep the current temperatures
steady through the rest of the early morning hours. Looking at
dewpoint temperatures, almost all sites show 1-2 degrees of dewpoint
depression and with CAA pretty much halted now with calm or very
light north winds, don't think these temperatures will be able to
fall much, if any. Also of consideration is the very shallow nature
of the cold air in place. Even if surface temperatures are able to
reach freezing, rap soundings indicate temperatures at 1000ft around
40 degrees. So while freezing rain is still very much possible, it
will likely only be able to exist as freezing rain with the lightest
precip. The more significant rain producing showers will likely serve
to pull down this much warmer air, or the precip itself will be
considerably warmer than the surface and wont have enough residence
time to even become supercooled. Thus, while freezing rain chances
are not non-zero, still don't believe this will result in anything
significant for the hill country other than low lying areas that are
a few degrees cooler seeing a light glaze, if anything at all.

Temperatures will begin rising slowly shortly after 12z and eliminate
any freezing rain possibilities but shower activity should be
prevalent through about 18z as overrunning and a weak ul disturbance
interact, but as that disturbance shifts northeast, so will the
shower activity. Thus have tempered down pop chances after 18z today
for the eastern 2 3 of the CWA and removed pops entirely for the
western third.

Models have been ramping up QPF with the next h5 shortwave overnight
tonight into tomorrow morning, both in the synoptic and hi-res model
suite. A strengthening low level jet will push the 850 mb front back
to the north providing a focus for convergence as the shortwave
passes over. As these features come into phase initially between 06z
and 12z Friday morning, so will pop chances. However, QPF should be
maximized north and east of the cwa, closer to the where the 850 mb
front sets up over north texas.

Long term (Friday night through Wednesday)
Our next frontal system will arrive from the west on Saturday and
bring westerly winds and much drier air into the region Saturday
afternoon. Some initial precip associated with the frontal passage is
expected but behind the front, rh values are expected to drop
considerably with gusty winds of up to 25 mph in the afternoon. Many
will likely welcome this as this will finally bring some sunshine to
the region for the latter half of the weekend with temperatures in
the 60s 70s.

Towards the end of the extended, Tuesday evening, we will begin to
see effects of the next trough positioned on the windward side of the
rockies. Gfs ECMWF canadian all generally agree on pops increasing
Tuesday but how long we will be effected by the trough is in question
as the GFS lifts this feature quickly northeast by Wednesday night
but the other two keep a closed low just to the west of the four
corners region. Thus confidence is low for details beyond Tuesday.

Preliminary point temps pops
Austin camp mabry 47 45 69 61 73 70 70 60 40 60
austin bergstrom intl airport 47 45 70 62 72 70 70 50 40 60
new braunfels muni airport 50 47 70 62 74 60 70 50 40 50
burnet muni airport 44 43 64 57 70 70 70 70 50 60
del rio intl airport 57 51 69 57 75 30 30 30 30 10
georgetown muni airport 45 43 66 60 71 70 70 70 40 60
hondo muni airport 53 50 70 61 76 50 60 60 40 30
san marcos muni airport 48 45 71 62 73 70 70 50 40 50
la grange - fayette regional 51 49 75 65 74 60 70 40 30 60
san antonio intl airport 51 48 70 62 74 60 70 50 40 50
stinson muni airport 52 48 72 63 76 60 70 40 40 40

Ewx watches warnings advisories
None.

Mesoscale aviation... 04
synoptic grids... Tb3


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lago Vista TX, Rusty Allen Airport, TX6 mi66 minN 51.00 miLight Rain35°F35°F100%1023 hPa
Austin City, Austin Camp Mabry, TX11 mi70 minN 53.00 miFog/Mist38°F36°F93%1024.5 hPa
Austin-Bergstrom International Airport, TX21 mi68 minN 123.00 miLight Drizzle Fog/Mist38°F37°F100%1023.9 hPa
Georgetown, Georgetown Municipal Airport, TX21 mi65 minN 94.00 miLight Rain Fog/Mist35°F34°F96%1024.8 hPa

Wind History from RYW (wind in knots)
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Last 24hrN10
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N7NW5NW9
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NW6NW8N8N3N5N5N5N4N6N5
1 day agoS8
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S8S7S5S5S6S5SE6SE7SE6SE8N16
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2 days agoS7S8S5S7S12
G20
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S7SE8
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G23
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S8
G24

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
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GOES Local Image of SouthCentralPlains    EDIT
Geos

Wind Forecast for Austin/San Antonio, TX (6,6,7,8)
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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.