Thursday, July18, 2019 L-36.com


Marine Weather and Tides
Jamaica Beach, 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 6:30AMSunset 8:20PM Thursday July 18, 2019 4:15 AM CDT (09:15 UTC) Moonrise 8:51PMMoonset 6:59AM 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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GMZ355 Expires:201907182115;;243194 Fzus54 Khgx 180900 Cwfhgx Coastal Waters Forecast National Weather Service Houston/galveston Tx 400 Am Cdt Thu Jul 18 2019 Upper Texas Coastal Waters From High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays Seas Are Provided As A Range Of The Average Height Of The Highest 1/3 Of The Waves...along With The Occasional Height Of The Average Highest 10 Percent Of The Waves. Gmz350-355-182115- Coastal Waters From Freeport To Matagorda Ship Channel Tx Out 20 Nm-coastal Waters From High Island To Freeport Tx Out 20 Nm- 400 Am Cdt Thu Jul 18 2019
Today..South winds 10 to 15 knots. Seas 2 to 3 feet.
Tonight..South winds 10 to 15 knots. Seas 2 to 3 feet.
Friday..South winds 10 to 15 knots. Seas 2 to 3 feet.
Friday night..South winds 10 to 15 knots. Seas 2 to 3 feet.
Saturday..Southeast winds 10 to 15 knots. Seas 2 to 3 feet. A slight chance of showers and Thunderstorms in the morning.
Saturday night..South winds 10 to 15 knots. Seas 2 to 3 feet. A slight chance of showers and Thunderstorms.
Sunday..South winds 5 to 10 knots. Seas 2 to 3 feet. A chance of showers and Thunderstorms.
Sunday night..South winds around 10 knots. Seas 2 to 3 feet. A slight chance of showers and Thunderstorms.
Monday..South winds 5 to 10 knots. Seas 2 feet. A chance of showers and Thunderstorms.
Monday night..South winds around 10 knots becoming southwest after midnight. Seas 1 to 2 feet. A chance of showers and Thunderstorms.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 400 Am Cdt Thu Jul 18 2019
Synopsis for high island to matagorda ship channel out 60 nm.. High pressure over the gulf and lower pressure in the lee of the rockies will maintain a typical summertime pattern with moderate onshore winds.


7 Day Forecast for Marine Location Near Jamaica Beach, TX
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location: 29.2, -94.99     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 180859
afdhgx
area forecast discussion
national weather service houston galveston tx
359 am cdt Thu jul 18 2019

Short term [today through tonight]
Yesterday there was a bit more shower and thunderstorm activity than
expected over northern harris and montgomery counties. This was
mainly due to a higher area of moisture precipitable water. GOES 16
sounder precipitable water imagery depicted this higher area of
moisture and now shows that it has moved off to the north and
decreased. Precipitable water values are now down to 1.6 to 1.7
instead of near 2 inches yesterday afternoon. Upper level ridging
also looks to be stronger today with 500mb heights of 594-595dm over
the area. This ridge should expand and keep a zonal jet stream in
place over the northern tier of states.

We are going to try not swing the pendulum too much with pops today
as there should be less convective coverage than yesterday even
though there was quite a bit more activity than expected. We will
keep a smattering of 20-30 pops for areas where mesoscale models
think showers and a few storms will be possible. There may be a few
showers that form late morning through early afternoon with possibly
a strong storm or two with the sea breeze. Bulk of the activity
should focus through harris and montgomery counties like the last
day or two.

The only other issue to monitor will be heat index values again.

Forecast has dewpoints mixing out during the afternoon but there are
a few spots that inevitably do not mix leading to higher heat index
values. These higher values could reach heat advisory criteria but
may only be observed for an hour or two and not widespread enough
for a heat advisory. Still it will be something to monitor.

Overpeck

Long term [Friday through Thursday]
Patchy fog looks possible again early Friday morning, lifting
shortly after sunrise. Friday should be the hottest day through
the upcoming week, with mostly sunny skies overhead and high
temperatures rising into the low to mid 90s area wide. Heat index
values will range between 103 to 106 degrees, approaching
borderline heat advisory criteria. A typical summertime pattern
will remain in place through the beginning of next week with
isolated to scattered showers and thunderstorms possible. By
Saturday the chance for showers and thunderstorms return, allowing
for better cloud cover and slightly cooler temperatures. The
region of high pressure that was overhead will weaken and shift to
the northwest allowing for better moisture return with onshore
flow. Overall coverage in precipitation does look to increase
Sunday and Monday. Although, there appears to be some disagreement
in the overall placement strength of a trough axis that
eventually pushes over SE tx Sunday. Global guidance such as the
ecmwf is not as strong with this inverted trough axis as is the
gfs. Regardless, this region of low pressure eventually gets
picked up by what looks to be a frontal boundary that attempts to
slide southeast into the gulf of mexico sometime between Wednesday
morning to Thursday afternoon, depending on the model solution.

Therefore, the next best chance for showers and thunderstorms will
be associated with this feature Tuesday and Wednesday. Given the
amplified pattern in the upper levels, if this front does make its
way into the gulf, which is unusual for this time of year, expect
slightly drier dewpoints to usher in and only slightly cooler
temperatures by a few degrees Thursday and Friday.

Hathaway

Aviation [06z TAF issuance]
06z aviation... Expecting periods of early morning MVFR ceilings
across inland TAF sites again. Only expect isolated convection
tomorrow afternoon, so for now have left out of most tafs. 33

Marine
Overall the next few days we can expect a typical summer time
forecast. Winds will generally be from the south around 10-15 knots
with a slight increase to 13-17 knots at times overnight. This will
also support seas around 2-4 feet. The only other concern will be
slightly higher tides and rip currents. Tides should be about a half
foot to a foot above normal but not cause any problems.

Overpeck

Climate
Yesterday was another warm day, breaking tying two high minimum
temperature records. Houston hobby recorded a low temperature of
80 degrees yesterday which breaks the old record high minimum
temperature of 79 degrees set in 1987. Secondly, the city of
galveston set a record high minimum temperatures of 84 degrees,
tying the old record of 84 degrees set in 1987.

Hathaway

Preliminary point temps pops
College station (cll) 96 77 97 76 95 0 0 0 0 10
houston (iah) 94 78 95 78 93 10 10 10 0 20
galveston (gls) 90 83 90 82 89 20 10 10 10 20

Hgx watches warnings advisories
Tx... None.

Gm... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
GRRT2 9 mi52 min SSW 9.9 G 13 83°F 87°F1016.3 hPa
LUIT2 11 mi46 min S 8.9 G 14 84°F 86°F1016.5 hPa
GTOT2 13 mi46 min S 8.9 G 13 84°F 87°F1016.6 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 18 mi52 min S 12 G 16 86°F 86°F1015.8 hPa
EPTT2 - 8771013 - Eagle Point, TX 20 mi52 min S 12 G 12 84°F 85°F1016.3 hPa
FCGT2 - 8772447 - USCG Freeport, TX 24 mi52 min SSE 13 G 16 85°F 87°F1016.9 hPa
FPST2 24 mi46 min SE 15 G 16 84°F 86°F1016.1 hPa
KXIH 25 mi21 min S 12 G 17 84°F 75°F
42035 - GALVESTON 22NM East of Galveston, TX 31 mi26 min S 12 G 16 86°F 85°F3 ft1017.6 hPa81°F
MGPT2 - 8770613 - Morgans Point, TX 33 mi52 min S 6 G 8.9 83°F 87°F1016.9 hPa
RLOT2 - 8770971 - Rollover Pass, TX 33 mi46 min S 6 G 11 83°F 87°F1017.1 hPa
NCHT2 - 8770777 - Manchester, TX 39 mi46 min SSW 4.1 G 5.1 82°F 87°F1016.2 hPa
HIST2 42 mi52 min S 4.1 G 8.9 82°F 86°F1016.7 hPa
SGNT2 45 mi46 min SSE 13 G 16 85°F 87°F1015.8 hPa

Wind History for Galveston Pleasure Pier, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Galveston, Scholes Field, TX8 mi24 minS 1110.00 miA Few Clouds85°F77°F77%1017 hPa

Wind History from GLS (wind in knots)
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Last 24hrS12S10S9S10S11S12S11S11S12S13S13S14S12S11S13S11S13S10S12S12S13S12S11S11
1 day agoS12S12S10S11S12S13S11S13S13S16S12S13S14S12S10S9S10S10SE9S10SE11S13S11S14
2 days agoSW7S15
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SW6SW8SW14S13S13S11S17
G24
S12S11S15S14S11S11S13S11S12S12S13S13S14S13S15

Tide / Current Tables for Jamaica Beach, West Bay, Galveston Bay, Texas
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Bolivar Roads, Texas Current
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Bolivar Roads
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Thu -- 03:16 AM CDT     0.00 knots Slack
Thu -- 06:31 AM CDT     Sunrise
Thu -- 06:54 AM CDT     2.02 knots Max Flood
Thu -- 07:58 AM CDT     Moonset
Thu -- 01:34 PM CDT     -0.00 knots Slack
Thu -- 08:19 PM CDT     Sunset
Thu -- 09:49 PM CDT     Moonrise
Thu -- 11:27 PM CDT     -1.92 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.9-1.6-1-0.20.61.41.921.91.61.20.90.60.2-0.1-0.4-0.5-0.6-0.7-0.9-1.2-1.5-1.8-1.9

Weather Map and Satellite Images
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wmap_A
GOES Local Image of SouthCentralPlains    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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Houston/Galveston, TX (5,6,7,8)
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Ground Weather Radar Station Houston/Galveston, TX
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Gulf Stream Current


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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.