Thursday, May23, 2019 L-36.com


Marine Weather and Tides
Bolivar Peninsula, TX

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:21AMSunset 8:10PM Thursday May 23, 2019 12:12 PM CDT (17:12 UTC) Moonrise 11:36PMMoonset 9:27AM Illumination 78% Phase: Waning Gibbous; Moon at 19 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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GMZ335 Galveston Bay- 1036 Am Cdt Thu May 23 2019
.small craft should exercise caution...
Rest of today..Southeast winds 15 to 20 knots. Bay waters slightly choppy to choppy.
Tonight through Saturday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Sunday..Southeast winds around 10 knots. Bay waters smooth to slightly choppy.
Sunday night..Southeast winds 10 to 15 knots. Bay waters slightly choppy.
Monday..South winds 10 to 15 knots. Bay waters slightly choppy.
Monday night..Southeast winds 10 to 15 knots becoming south 15 to 20 knots after midnight. Bay waters slightly choppy becoming choppy after midnight.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 1036 Am Cdt Thu May 23 2019
Synopsis for high island to matagorda ship channel out 60 nm.. Moderate onshore winds and elevated seas will persist for the next couple of days. Wind speeds and seas should generally diminish Saturday with more typical summer wind patterns with higher winds offshore at night that relax during the day. The pressure gradient will tighten back up again early next week with a corresponding increase of winds and seas.


7 Day Forecast for Marine Location Near Bolivar Peninsula, TX
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location: 29.49, -94.56     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 231647
afdhgx
area forecast discussion
national weather service houston galveston tx
1147 am cdt Thu may 23 2019

Aviation
MVFR rising toVFR quickly by afternoon except near the coast. Llj
over the western areas this morning should help keep it breezy
today with SE winds 13-17g18-25kt. MVFR deck developing and
expanding quickly inland this evening and continuing through mid
morning. LLJ to the west of the region tonight will keep winds up
tonight but it is a little further west and weaker so slightly
lighter winds. Nearly rinse and repeat for the tafs with
persistence.

45

Prev discussion issued 1053 am cdt Thu may 23 2019
update...

general concept of the forecast is on track, with biggest changes
being to nudge up southerly winds to better track with
observations as well as giving a bit of a re-ramp pops in the
west to line up with radar trends as a few sprinkles are beginning
to pop up in jackson and wharton county.

Prev discussion issued 415 am cdt Thu may 23 2019 ...

discussion...

southeastern texas getting clipped by a central texas near 40
knot low level jet. Our regional morning 30 knot lower layer
winds have translated to 15 to 25 (gust 35) knot surface winds,
especially strongest across the coastal counties. These gusty
overnight winds have prompted a wind advisory for the immediate
coastline through 10 am. Water vapor imagery may be picking up on
a small weak disturbance moving into the northern reaches of the
mexican provinces of nuevo leon and tamaulipas. This disturbance
may work its way up into southern texas and reach our far western
zones around matagorda bay later this morning. If so, it may
provide enough lift within a conditionally unstable and highly
moist (near 1.7 inch pwat) environment surrounding matagorda bay
that, in tandem with a weakening low level 25 knot jet, to
initiate scattered showers and maybe that rogue thunderstorm.

Slight to low end chance pops for slowly north and eastern
propagating cells along and in the vicinity of the highway
59 interstate 69 corridor southwest of metro through the
afternoon. This will probably be the last mentionable chance for
rain in a week. Recently amped up winds will fall back to 10 to
15 knot magnitudes during the day, 5 to 10 knot overnight speeds.

Eastern upper ridging centered over the southeastern u.S. Is
forecast to expand westward in the coming days and overtake
eastern texas. Suppression with these higher heights are expected
to envelop the region and nil any appreciable rain chances through
mid next week. A trend towards relatively drier air moving in on
a general southerly steering flow will assist in ending this trend
of record high minimum temperatures; expect average lower to
middle 70 sunrise temperatures. Partially cloudy days will have
more Sun making it to the surface and warming many into the
slightly above normal lower 90s each subsequent day through the
period. Slightly lower humidity levels, per more sunshine
assisting in more efficient afternoon mixing, will keep heat
indices in the mean middle 90s, or a few degrees above ambient
afternoon temperatures through late may. Even though sub 100 heat
indices are forecast, it is important to bear in mind that early
warm season heat, with lessened air quality (as more Sun creates
higher levels of lower level ozone), can be a silent killer in
terms of heat-related stress and exhaustion. Limit afternoon
activities, stay shaded and hydrated and always check your
vechicle's backseat for the little ones. 31
aviation...

mix of MVFRVFR ceilings across the area early this morning. Should
transition into mostlyVFR this afternoon. There will probably be
some iso shra around, but not planning to include any vcsh wording
attm and let amendments take care of those if need be. Ceilings
should lower back down into MVFR territory this evening. 12z taf
package should look similar to what's already out. 47
marine...

moderate onshore flow will persist today and tonight. Will keep the
current configuration of advsy flags in place, though the day shift
may be able to downgrade some locations to caution later today.

Overall trend should be for slightly lower winds seas as we head
into the weekend... Though marine conditions will probably be rougher
than we've seen the past several memorial day weekends which will
need to be taken into consideration given the high number of people
expected at area beaches and on the water.

Coastal flood advisory will continue along the gulf facing coast
today. Minor coastal flooding remains a possibility around times of
high tide. The more prone location will be the highway 87 124
intersection on bolivar today. Levels have been trending down the
past 24-36 hours. We may be able to make this the last
advisory... And transition to more of a beach hazards product
incorporating the primary issue of being the rip current risk for
the holiday weekend.

Winds seas build again early next week as the pressure gradient
tightens back up. 47

Preliminary point temps pops
College station (cll) 91 75 92 74 91 20 0 0 0 0
houston (iah) 91 76 92 75 91 10 0 0 0 0
galveston (gls) 86 79 88 79 85 10 0 0 0 0

Hgx watches warnings advisories
Tx... Coastal flood advisory until 5 pm cdt this afternoon for the
following zones: brazoria islands... Galveston island and
bolivar peninsula... Matagorda islands.

Gm... Small craft advisory until 7 am cdt Friday for the following
zones: coastal waters from freeport to matagorda ship
channel tx out 20 nm... Coastal waters from high island to
freeport tx out 20 nm... Matagorda bay... Waters from
freeport to matagorda ship channel tx from 20 to 60 nm...

waters from high island to freeport tx from 20 to 60 nm.

Small craft should exercise caution until 5 pm cdt this
afternoon for the following zones: galveston bay.

Discussion... 25
aviation marine... 45


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RLOT2 - 8770971 - Rollover Pass, TX 3 mi43 min SSE 18 G 21 81°F 81°F1017.5 hPa
HIST2 12 mi49 min SE 6 G 14 83°F 81°F1017.2 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 13 mi49 min SE 20 G 22 85°F 81°F1016.1 hPa
GTOT2 17 mi43 min SSE 7 G 16 82°F 81°F1016.9 hPa
42035 - GALVESTON 22NM East of Galveston, TX 19 mi43 min SE 16 G 19 80°F 80°F1017.8 hPa80°F
EPTT2 - 8771013 - Eagle Point, TX 19 mi43 min SSE 15 G 18 81°F 81°F1016.5 hPa
GRRT2 22 mi43 min S 14 G 18 81°F 82°F1016.2 hPa
KXIH 22 mi38 min SE 21 82°F 75°F
MGPT2 - 8770613 - Morgans Point, TX 26 mi43 min SE 8.9 G 20 82°F 81°F1017.3 hPa
42043 - GA-252 TABS B 39 mi133 min SE 16 G 18 81°F1015.9 hPa (+1.2)
SBPT2 - 8770570 - Sabine Pass North, TX 40 mi43 min SE 19 G 21 81°F 82°F1019.9 hPa
TXPT2 40 mi43 min SE 18 G 21 80°F 80°F1017.8 hPa
LUIT2 41 mi43 min SE 15 G 20 82°F 82°F1016.6 hPa
NCHT2 - 8770777 - Manchester, TX 41 mi43 min S 11 G 18 83°F 81°F1016.3 hPa
PORT2 - 8770475 - Port Arthur, TX 42 mi43 min SE 11 G 18 83°F 80°F1018.7 hPa

Wind History for Rollover Pass, TX
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
High Island 179A (Apache Corp), LA22 mi38 minSE 217.00 miFair and Breezy82°F75°F79%1016.9 hPa
Galveston, Scholes Field, TX22 mi21 minSE 166.00 miOvercast with Haze83°F77°F82%1017.3 hPa

Wind History from GLS (wind in knots)
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Tide / Current Tables for Gilchrist, East Bay, Texas
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Gilchrist
Click for Map
Thu -- 05:54 AM CDT     -0.05 feet Low Tide
Thu -- 06:21 AM CDT     Sunrise
Thu -- 10:27 AM CDT     Moonset
Thu -- 01:51 PM CDT     1.30 feet High Tide
Thu -- 08:08 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.70.50.30.1-0-0.100.20.40.70.91.21.31.31.31.21.21.21.11.11.111

Tide / Current Tables for Galveston Bay Entrance, Texas Current
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Galveston Bay Entrance
Click for Map
Thu -- 12:16 AM CDT     -2.51 knots Max Ebb
Thu -- 05:28 AM CDT     0.00 knots Slack
Thu -- 06:22 AM CDT     Sunrise
Thu -- 09:04 AM CDT     2.05 knots Max Flood
Thu -- 10:28 AM CDT     Moonset
Thu -- 03:59 PM CDT     -0.00 knots Slack
Thu -- 08:08 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-2.5-2.5-2.2-1.7-1.1-0.40.41.31.92.121.81.51.20.70.3-0-0.4-0.6-0.8-0.9-1.2-1.6-2

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 Houston/Galveston, TX (13,3,4,5)
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Ground Weather Radar Station Houston/Galveston, TX
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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.