Thursday, August17, 2017 L-36.com


Marine Weather and Tides
Olmos Park, 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 8:12PM Thursday August 17, 2017 12:34 PM CDT (17:34 UTC) Moonrise 1:45AMMoonset 3:47PM Illumination 21% Phase: Waning Crescent; Moon at 25 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 Olmos Park, TX
   Hourly   EDIT   Help
location: 29.4, -98.48     debug


Area Discussion for - Austin/San Antonio, TX
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus64 kewx 171523
afdewx
area forecast discussion
national weather service austin san antonio tx
1023 am cdt Thu aug 17 2017

Update
Low temperatures and overnight dewpoints were higher than expected
which should lead to slightly higher values of moisture this
afternoon. In addition, southwest winds at the surface may lead to
higher high temperatures as well today. Upped high temps and
dewpoints across the eastern counties and this should lead to heat
advisory criteria being exceeded in the far eastern counties. Went
ahead and issued a heat advisory for lee, fayette, lavaca, gonzales,
and dewitt county.

Prev discussion issued 617 am cdt Thu aug 17 2017
update...

12z aviation update below.

Aviation...

MVFR ceilings in stratus continues early this morning along the
escarpment edge into portions of the hill country. This includes
sat ssf and at times aus. There is a chance the stratus may develop
into drt around or after 12z but lower confidence in this.VFR
conditions redevelop 15z-17z as stratus mixes out. Generally shras
and tstms should stay north and west of the area and TAF sites today.

Prev discussion... Issued 350 am cdt Thu aug 17 2017
short term (today through Friday)...

high pressure aloft remains dominant over most of south central tx,
with some subtle instability hanging on over parts of the edwards
plateau into NRN mexico early this morning. A tropical moisture axis
and weak mid-level cyclonic shear over this region has allowed for a
few elevated overnight showers generally north of rocksprings and
west of del rio. Satellite imagery loops depicting mid level clouds
and rapid refresh models would suggest some cyclonic shear rooted
over the serranias del burros will extend into swrn parts of val
verde county to allow for continued weak elevated convection into the
daytime.

The mid level ridge axis over central tx will both strengthen and
build northward today and tonight, leading to reduced surface winds
in the late afternoon and evening over the next couple days. While
the trend for very gradual lowering of day-to-day heat indices should
continue through afternoon mixing and lack of rainfall, triple digit
heat index values remain in the picture. Those spending several
hours outdoors in the afternoon and evening along and east of i-35
may not sense the slight improvement due to the lighter winds from
the seabreeze. Will continue show the elevated heat indices in the
sps hwo.

Long term (Friday night through Wednesday)...

the mid-level ridge axis remains entrenched over central tx over the
weekend, with the orientation tilting as heights build nwd over the
srn rockies Saturday. By Monday, a pacific upper low erodes this wrn
build-up again and a tutt low over the gulf pinches off the eastern
edge of the ridge axis. In the center, the upper ridge remains
dominant over tx with only subtle changes in the surface winds
expected early next week versus this weekend.

Some deterministic data anticipates a surge in pwat values to
generate rain chances, but knowing subsidence enhancement precedes
the approach of a tutt from the east, the drier GFS looks most
probable. None of the above mentioned mid upper level pattern shifts
should put a significant dent in the triple digit heat and or heat
indices through at least Tuesday.

Model diverge a bit on the broader mid-level pattern on Wednesday
with the GFS showing an inverted trough over S tx left from the
weakening tutt and the ecm depicting potential instability arriving
from the north after a westward shift of the ridge aloft. Will give
in to a generic isolated rain chance for Wednesday for all areas as
either of these solutions seem plausible.

Preliminary point temps pops
Austin camp mabry 77 100 77 100 76 10 0 0 - 10
austin bergstrom intl airport 76 99 76 100 75 10 0 0 - 10
new braunfels muni airport 75 99 75 100 75 - 0 0 - 10
burnet muni airport 74 98 74 98 74 10 0 0 - -
del rio intl airport 78 99 78 101 78 0 - 0 - 0
georgetown muni airport 76 98 75 98 75 10 0 0 - 10
hondo muni airport 75 100 74 101 74 0 0 0 0 -
san marcos muni airport 76 99 75 100 75 10 0 0 - 10
la grange - fayette regional 77 99 76 100 76 10 - 0 10 10
san antonio intl airport 76 99 76 99 76 0 0 0 0 10
stinson muni airport 76 101 76 101 76 0 0 0 0 10

Ewx watches warnings advisories
Heat advisory from 2 pm this afternoon to 7 pm cdt this evening for
the following counties: de witt... Fayette... Gonzales... Lavaca... Lee.

Mesoscale aviation... Lh
synoptic grids... Hampshire


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
Kelly Air Force Base, TX5 mi96 minS 610.00 miA Few Clouds88°F73°F62%1016.4 hPa
San Antonio, Stinson Municipal Airport, TX5 mi41 minVar 610.00 miA Few Clouds91°F72°F54%1015.6 hPa
San Antonio, San Antonio International Airport, TX10 mi1.7 hrsS 910.00 miPartly Cloudy87°F71°F59%1016.1 hPa
Randolph Air Force Base, TX14 mi38 minS 910.00 miFair90°F71°F56%1017 hPa
Castroville Municipal Airport, TX20 mi79 minSSE 410.00 miFair89°F66°F47%1018.3 hPa

Wind History from SKF (wind in knots)
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
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
Last 24hrS11S12
G19
S11
G15
SE5
G17
SE12SE15
G17
E16SE14
G21
SE15SE17SE16SE11
G18
SE10SE10S10S9S7SE6SE6SE6SE6SE6S6SE6
1 day agoSE11SE13SE10
G19
SE16SE12SE14E17SE16SE13
G21
SE13
G19
SE16
G23
SE12SE14S12SE9SE8SE5S10S9S8S9SE15S11S12
2 days agoS5SE8SE9E8SE8SE12
G16
SE11E11SE13
G22
SE13
G21
SE14
G21
SE11SE7SE9SE7SE7SE7SE7SE7SE7SE9S10S12SE8

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 (13,3,4,5)
      (on/off)   Help

Ground Weather Radar Station Austin/San Antonio, TX
   (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.