Friday, May26, 2017 L-36.com


Marine Weather and Tides
Sunset Valley, TX

Version 3.4
What's New / NOTES
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 6:29AMSunset 8:26PM Friday May 26, 2017 7:32 PM CDT (00:32 UTC) Moonrise 6:30AMMoonset 8:33PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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
    EDIT      (on/off)   Help
7 Day Forecast for Marine Location Near Sunset Valley, TX
   Hourly   EDIT   Help
location: 30.21, -97.8     debug


Area Discussion for - Austin/San Antonio, TX
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus64 kewx 262347
afdewx
area forecast discussion
national weather service austin san antonio tx
647 pm cdt Fri may 26 2017

Aviation discussion For 00z TAF period...

scattered CU extends from the coast to the i-35 corridor this
afternoon with high clouds moving in from the west. Expecting MVFR
and borderline ifr CIGS beginning before midnight and persisting
through at least daybreak. Improvement toVFR is then expected mid to
late morning with gusty winds possible along the i-35 corridor in
the afternoon.

Prev discussion issued 313 pm cdt Fri may 26 2017
short term (tonight through Saturday night)...

expect another warm and muggy night across south central texas as
southeasterly flow in the low-levels keeps gulf moisture in place.

Overnight low temperatures should be fairly uniform, ranging from the
low to mid 70s. There is a low chance for an isolated shower or two
overnight for areas generally along and east of the i-35 corridor.

Confidence in any measurable precipitation is low and we will not
include in the forecast at this time. On Saturday, we expect another
round of hot temperatures across all of south central texas. Highs
will range from the lower 90s in the hill country to near 100 along
the rio grande. The heat and humidity will push afternoon heat index
values into the 102-104 degree range generally along and east of
i-35, with values inching higher into the 105-108 range along the rio
grande plains. While we could be looking at the need for another
heat advisory tomorrow, the latest models show better potential for
mixing, which should help to lower dew points in the afternoon. We'll
need to monitor areas generally along and south of the u.S. Highway
57 corridor for the possibility of a heat advisory. Otherwise, the
models do continue to show some potential for isolated convection
across the hill country, southern edwards plateau and rio grande
plains late Saturday afternoon and evening. It will likely take
strong surface heating and orographic lift over the serranias del
burro mountains to get convection going. We could see some of this
convection move into val verde county during the very late afternoon
or early evening hours. Some additional convection may also develop
across west central texas along the dryline and some of this activity
may eventually work it's way into the western hill country. SPC now
only shows a marginal risk across the hill country, southern edwards
plateau and portions of the rio grande plains. We agree and will
place the emphasis for areas along and north of a del rio to
rocksprings to llano line. Should any severe storms manage to
develop, hail and high winds will be the main severe weather
concerns.

Long term (Sunday through Friday)...

the main focus for this forecast package continues to be centered on late
this weekend into the early portion of next week as a cold front
moves into the region. The front should enter the southern edwards
plateau and western hill country by early Sunday afternoon.

Meanwhile, a series of upper level disturbances embedded in the
active southwesterly flow aloft will move across the region. We
expect scattered thunderstorms to develop along the boundary as it
slowly progresses southward. Some of this activity could become
severe given adequate instability, lift and shear. SPC has most of
south central texas in the slight risk category on Sunday. The main
severe weather concerns will be large hail and a few damaging wind
gusts.

While the latest medium range models have eased a bit with their expected
rainfall amounts along the rio grande late Sunday and Monday, not
much has changed in the overall pattern. The cold front could move a
little farther south than previously anticipated and this could shift
the focus for rainfall a little southward. However, we are still
concerned about locally heavy rainfall along the rio grande and the
southern edwards plateau as the GEFS plume data as well as mos
guidance continue to show good potential for heavy rains.

On Tuesday, the cold front is expected to dissipate over the coastal
plains. We should continue to have plenty of moisture across the
region and with some weak mid-level shortwaves moving across,
suspect we will see scattered convection, especially during the
afternoon hours.

The forecast for the remainder of the upcoming work week appears to
remain wet given plenty of moisture and an active southwest flow
aloft. The flow aloft is fairly weak, so while we can't rule out the
possibility of a few strong storms, the overall threat for severe
weather appears low at this time.

Preliminary point temps pops
Austin camp mabry 77 95 75 91 69 10 10 10 30 70
austin bergstrom intl airport 77 95 75 91 69 10 10 10 30 60
new braunfels muni airport 76 95 76 91 70 10 10 10 20 60
burnet muni airport 75 94 73 88 66 10 10 20 40 70
del rio intl airport 78 98 77 92 72 - 10 20 30 70
georgetown muni airport 76 94 75 89 67 10 10 10 30 70
hondo muni airport 78 97 76 92 71 - 10 10 30 60
san marcos muni airport 77 95 76 91 69 10 10 10 20 60
la grange - fayette regional 77 94 77 91 71 10 10 10 20 60
san antonio intl airport 77 96 76 91 71 10 10 10 30 60
stinson muni airport 77 96 76 92 72 10 10 10 20 60

Ewx watches warnings advisories
Heat advisory until 7 pm cdt this evening for the following
counties: atascosa... Dimmit... Frio... Maverick... Zavala.

Mesoscale aviation... Tb3
synoptic grids... 04
public service data collection... Treadway


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Austin-Bergstrom International Airport, TX7 mi40 minS 810.00 miPartly Cloudy90°F72°F56%1007.7 hPa
Austin City, Austin Camp Mabry, TX8 mi42 minS 310.00 miA Few Clouds89°F71°F55%1008.1 hPa
Austin Executive Airport, TX18 mi38 minS 410.00 miFair86°F73°F66%1009.5 hPa
Lago Vista TX, Rusty Allen Airport, TX22 mi38 minS 310.00 miPartly Cloudy87°F71°F60%1010.5 hPa
San Marcos, San Marcos Municipal Airport, TX22 mi38 minS 810.00 miFair88°F71°F59%1009.5 hPa

Wind History from AUS (wind in knots)
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
Last 24hrS11S12S11S10S11S14
G21
S14
G23
S13
G20
S11S11S8S11S8S11S11
G17
S11S12S11S12S9S14S11SW10S8
1 day agoCalmSE3S4S3CalmSW3SW4S5SW9SW8SW9SW11S13
G21
S14
G29
S21
G29
S18
G31
S20
G28
S17
G23
S17
G23
S17
G24
S17
G22
S15
G24
S14
G22
S13
G22
2 days agoNW12NW7NW6N11NW9NW6NW6NW4NW7NW6NW7NW6W7W6W8W8W8
G19
NW9N13
G17
NW7
G16
NW6NW65NW4

Tide / Current Tables for
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of SouthCentralPlains    EDIT
Geos

Wind Forecast for Austin/San Antonio, TX (20,4,5,8)
      (on/off)   Help

Ground Weather Radar Station Central Texas
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.