Marine Weather and Tides
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
|Sunrise 6:22AM||Sunset 8:09PM||Sunday May 20, 2018 7:53 PM CDT (00:53 UTC)||Moonrise 10:37AM||Moonset 12:00AM||Illumination 36%|
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|GMZ335 Galveston Bay- 333 Pm Cdt Sun May 20 2018 |
Tonight..Southeast winds 5 to 10 knots increasing to 10 to 15 knots after midnight. Bay waters smooth becoming slightly choppy after midnight. A slight chance of showers. A slight chance of Thunderstorms after midnight.
Monday..East winds around 5 knots becoming southeast in the afternoon. Bay waters smooth. A slight chance of showers and Thunderstorms.
Monday night..South winds 5 to 10 knots. Bay waters smooth.
Tuesday..Southeast winds around 5 knots becoming 5 to 10 knots in the afternoon. Bay waters smooth. A slight chance of showers and Thunderstorms.
Tuesday night..South winds 5 to 10 knots. Bay waters smooth.
Wednesday..Southeast winds 5 to 10 knots. Bay waters smooth. A slight chance of showers and Thunderstorms.
Wednesday night..South winds 5 to 10 knots becoming southwest after midnight. Bay waters smooth.
Thursday..Northwest winds around 5 knots becoming south in the afternoon. Bay waters smooth. A chance of showers and a slight chance of Thunderstorms.
Thursday night..South winds 5 to 10 knots becoming west after midnight. Bay waters smooth. A slight chance of showers and Thunderstorms.
Friday..Northwest winds around 5 knots becoming south in the afternoon. Bay waters smooth. A chance of showers and Thunderstorms.
Friday night..South winds 5 to 10 knots becoming west after midnight. Bay waters smooth. A slight chance of showers and Thunderstorms.
|GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 333 Pm Cdt Sun May 20 2018 |
Synopsis for high island to matagorda ship channel out 60 nm.. Light to moderate onshore winds this afternoon and evening will gradually diminish after midnight as high pressure settles into east texas. A large area of showers and Thunderstorms over southeast texas should shift toward the coast and could push out into the nearshore waters tonight. Gusty winds would accompany the storms. Light winds are expected most of the upcoming week.
7 Day Forecast for Marine Location Near San Leon, TXHourly EDIT Help
Area Discussion for - Houston/Galveston, TX  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus64 khgx 210002|
area forecast discussion
national weather service houston galveston tx
702 pm cdt Sun may 20 2018
Showers and thunderstorms are building southward this evening while
overall motion of precipitation is toward the east. Cll is
beginning to see clearing while uts, cxo, iah are continuing to be
impacted by thunderstorms. An outflow boundary is currently
racing out ahead of the main line of thunderstorms and pushing
through sgr and hou. Winds will be variable with gusty conditions
beneath stronger storms. Anticipating most of the thunderstorm
development to weaken by 03z, with showers lingering into the
early morning hours. The precipitation should clear from the
northwest to southeast. Some patchy fog will also be possible
between 09-15z across our northern TAF sites.
Should see a small break in the way of precipitation for the
coastal sites tomorrow morning. The possibility of shower
development will return at lbx and gls around sunrise. MVFR
ceilings will begin to rise toVFR in the late morning and into
the early afternoon hours. E-se winds will return by the afternoon
Prev discussion issued 404 pm cdt Sun may 20 2018
showers and storms will largely be welcome rainfall for much of
the area today. However, there is enough instability that an
isolated strong to marginally severe storm is still possible, and
these strongest storms could create a very localized minor
flooding problem is it dumps enough rainfall quickly enough over a
vulnerable location. Beyond that, we settle into a rather
summer-like pattern for most of the week.
Near term [through tonight]...
for the first time in a while, the radar is lit up with a number
of showers and thunderstorms near and to the northwest of houston.
Ir satellite shows the coldest cloud tops right around -70c,
though most of the area shows warmer tops. As one might expect
given this, rainfall totals have varied wildly from near nothing,
to a maximum gauge total of 2.36 inches north of iah, though
radar estimates imply a cell has dropped roughly three inches in
extreme southwestern montgomery county as well.
The streamer showers and storms that had made up the bulk of the
morning's rainfall has largely merged with a broken line of
thunderstorms following its cold pool's outflow boundary slowly to
the southeast. Mesoanalysis shows 1500 or so j kg of CAPE in the
environment ahead of the line, indicating we still have ample
instability for continued storms. Dcape west of houston is now
over 800 j kg, which implies that our main severe threat is
damaging straight-line winds, though even that is a fairly
marginal threat. In addition, high precipitable water values and
a CAPE profile that this evening will resemble more a heavy rain
look, also means that the strongest cells could generate some
briefly torrential downpours, creating localized flooding issues
in areas of poor drainage and near flashy small streams.
However, bulk shear is pretty weak, and this will inhibit updraft
organization and the ultimate severe and rain threats. The threat
will largely be confined to the most robust updrafts before they
collapse and where cells pass over a site repeatedly.
Additionally, since these storms are largely sustained by
instability alone, we'll see them very slowly wind down into the
nighttime hours once the Sun sets. This will further limit
rainfall potential near the coast, where the forecast doesn't
really have pops above 30 percent. Rainfall here may be fairly low
unless the line can push coastward more effectively in the next
Short term [Monday through Tuesday night]...
in many ways, tomorrow looks very similar to today. However,
without the upstream spark of a large convective system, I would
expect rainfall potential to be much more subdued despite similar
midlevel heights and what appears to be another shortwave moving
through. Ditto, really, for Tuesday. We'll definitely have some
things that will help support showers or storms that do develop,
but finding triggers for storms looks to be more difficult. Though|
places that have seen plenty of rain today will obviously be
warmer with more isolated convection, temperatures as a whole look
to be pretty stable the next couple of days.
Long term [Wednesday through Sunday]...
we spend the latter half of the week pinned between a building
ridge over western mexico and an upper low over the northern gulf
coast, which keeps us in a situation with potential for isolated
to scattered showers and storms, but lacking in obvious triggers,
keeping convective potential in check. Heights do look to rise,
and so introduce a slow rise in temperatures into the weekend.
Now, the potential wrench in the whole works: it appears the 12z
euro has got a bug in it to bring the upper low lifting out of the
caribbean sea towards louisiana this weekend. This could put an
end to any warming trend, and open us up to higher rain chances,
though i've undercut the guidance as i've leaned a little more to
the gfs, which was a little more like yesterday's forecast.
Now, as for what the euro does next week? I'm not gonna talk about
it. It's beyond the forecast period, I refuse to discuss it. It's
probably going to change before it gets into the forecast period
anyway. And if it doesn't change, then I will discuss it then.
Aviation [18z TAF issuance]...
impressively large area of showers and thunderstorms from del rio
fanning out to near fort worth to houston. Storms have been
getting stronger with the continued destabilization over the area.
Can't rule out strong thunderstorms with winds over 40 knots with
these probably near the cll uts cxo terminals this afternoon.
Expect the deeper cold pool with the large cluster of storms near
tpl-t35 to help steer the development southeastward. Have gone
more pessimistic in area tafs with vcts this afternoon
interspersed with tempo shra tsra through mid evening. Expect the
area of storms to shift southeastward late afternoon evening and
many of the hrrr WRF support this movement development as upper
short wave moves into the area aiding the ventilation. Between
03-08z expect that most precip will wane but a boundary is likely
to be present near the coast around sunrise and anticipate at
least some scattered showers in proximity to the boundary so will
reinstate vcsh near 12z for the coastal sites. After the storms
wane late evening some patchy fog possible in rain cooled areas.
southeast winds 10-15 knots probably getting a little stronger
and gustier tonight as inflow to deep convection shifts close to
the coast with the storms. Storm may spread out into the nearshore
waters this evening before weakening. Boundary remains in the
morning and could be focus for additional showers. Expect lighter
wind regime Monday through Thursday. Will be keeping an eye on the
eastern gulf this week with most models indicating lowering
pressures as upper low meanders about.
despite a good amount of rain upstream and some more rains
expected through tonight, widespread hydrology concerns are nil.
Rivers are well below bankfull, and given the recent dry weather,
the rain will largely be beneficial. The potential for isolated
stronger storms and high available atmospheric moisture does mean
some briefly torrential rainfall is possible with the strongest
cells. This could potentially cause very localized minor flooding
issues on flashy small streams.
Preliminary point temps pops
College station (cll) 68 90 70 91 70 60 20 10 20 10
houston (iah) 71 91 72 91 73 90 20 10 20 10
galveston (gls) 78 85 78 85 78 20 20 10 20 0
Hgx watches warnings advisories
aviation marine... 08
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|EPTT2 - 8771013 - Eagle Point, TX||0 mi||54 min||S 9.9 G 13||82°F||85°F||1015.4 hPa (+0.6)|
|GRRT2||12 mi||54 min||SE 6 G 8.9||81°F||84°F||1015.1 hPa (+0.4)|
|GNJT2 - 8771341 - Galveston Bay (North Jetty), TX||13 mi||54 min||SSE 7 G 8.9||80°F||81°F||1015.1 hPa (+0.4)|
|MGPT2 - 8770613 - Morgans Point, TX||14 mi||54 min||SE 6 G 9.9||82°F||83°F||1015.4 hPa (+0.6)|
|GTOT2||14 mi||54 min||SSE 2.9 G 7||82°F||83°F||1015.2 hPa (+0.4)|
|RLOT2 - 8770971 - Rollover Pass, TX||22 mi||54 min||S 7 G 8.9||81°F||84°F||1015.8 hPa (+0.6)|
|NCHT2 - 8770777 - Manchester, TX||25 mi||54 min||NW 8.9 G 12||76°F||82°F||1015.5 hPa (+1.7)|
|HIST2||29 mi||54 min||SSE 5.1 G 7||82°F||85°F||1016 hPa (+0.6)|
|KXIH||30 mi||39 min||SE 9.9||81°F||75°F|
|LUIT2||30 mi||54 min||SE 6 G 8||81°F||82°F||1014.9 hPa (+0.0)|
|42043 - GA-252 TABS B||34 mi||114 min||7.8 G 9.7||80°F||80°F||1014.8 hPa (+0.0)|
|FCGT2 - 8772447 - USCG Freeport, TX||42 mi||54 min||ESE 8 G 8.9||81°F||80°F||1015.2 hPa (+0.0)|
|SRST2 - Sabine Pass, TX||49 mi||54 min||S 8 G 9.9||81°F||1016.1 hPa (-0.0)|
Wind History for Eagle Point, TX(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Galveston, Scholes Field, TX||15 mi||62 min||SE 7||10.00 mi||Mostly Cloudy||82°F||75°F||82%||1015.6 hPa|
|Houston / Ellington, TX||16 mi||2.1 hrs||SE 10||10.00 mi||Mostly Cloudy||84°F||71°F||66%||1015.6 hPa|
|Houston, Pearland Regional Airport, TX||17 mi||61 min||SSE 5||10.00 mi||Overcast||82°F||73°F||77%||1015.6 hPa|
|Houston, Houston Hobby Airport, TX||22 mi||61 min||SSE 6||10.00 mi||Thunderstorm||82°F||73°F||77%||1015.6 hPa|
Wind History from GLS (wind in knots)
|1 day ago||S||S||S||SE||SE||S||S||S||S||S||S||S||S||S||S||S||S||S||S||SE||SE||SE||SE||SE|
|2 days ago||S||SW||SW||SW||SW||SW||SW||SW||S||S||S||SW||SW||S||S||S||SW||S||S||S||S||S||S||S |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Eagle Point |
Click for Map
Sun -- 12:36 AM CDT Moonset
Sun -- 05:15 AM CDT -0.09 feet Low Tide
Sun -- 06:24 AM CDT Sunrise
Sun -- 11:37 AM CDT Moonrise
Sun -- 04:50 PM CDT 1.35 feet High Tide
Sun -- 08:08 PM CDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Bolivar Roads |
Click for Map
Sun -- 12:35 AM CDT Moonset
Sun -- 01:58 AM CDT -2.02 knots Max Ebb
Sun -- 06:24 AM CDT Sunrise
Sun -- 06:32 AM CDT 0.00 knots Slack
Sun -- 10:12 AM CDT 2.09 knots Max Flood
Sun -- 11:36 AM CDT Moonrise
Sun -- 04:50 PM CDT -0.00 knots Slack
Sun -- 08:07 PM CDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  HelpWeather Map
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.
target = "new">Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Houston/Galveston, TX (20,4,5,8)(on/off)  Help
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