Thursday, March30, 2017 L-36.com


Marine Weather and Tides
Channelview, TX

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:09AMSunset 7:39PM Thursday March 30, 2017 7:32 PM CDT (00:32 UTC) Moonrise 8:13AMMoonset 9:40PM Illumination 13% Phase: Waxing Crescent; Moon at 3 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 Matagorda Bay-galveston Bay- 343 Pm Cdt Thu Mar 30 2017
Tonight..West winds 5 to 10 knots becoming south and increasing to 10 to 15 knots after midnight. Bay waters smooth becoming slightly choppy after midnight.
Friday..South winds 10 to 15 knots. Bay waters slightly choppy.
Friday night..Southeast winds 15 to 20 knots. Bay waters choppy.
Saturday..Southeast winds 15 to 20 knots. Bay waters choppy. A slight chance of showers and isolated Thunderstorms in the afternoon.
Saturday night..Southeast winds 15 to 20 knots decreasing to 10 to 15 knots after midnight. Bay waters choppy becoming slightly choppy after midnight. A chance of showers and Thunderstorms.
Sunday..Southeast winds 10 to 15 knots becoming south in the afternoon. Bay waters slightly choppy. Showers and Thunderstorms likely.
Sunday night..West winds 10 to 15 knots becoming northwest after midnight. Bay waters slightly choppy. A chance of showers and Thunderstorms.
Monday..West winds 10 to 15 knots. Bay waters slightly choppy.
Monday night..Southwest winds 5 to 10 knots becoming south after midnight. Bay waters smooth.
Tuesday and Tuesday night..South winds 10 to 15 knots. Bay waters slightly choppy.
GMZ300 Synopsis For High Island To The Matagorda Ship Channel Out 60 Nautical Miles Including Galveston And Matagorda Bays 343 Pm Cdt Thu Mar 30 2017
Synopsis for high island to matagorda ship channel out 60 nm.. Today's north to northwest winds will swing around to the south tonight and tomorrow and strengthen on Friday night and Saturday...and caution flags and small craft advisories will likely be needed into Saturday night due to the moderate to strong onshore flow and building seas. Look for increasing shower and Thunderstorm chances over the weekend in association with the next storm system. A cold front pushes off the coast Sunday night into Monday with moderate to strong offshore winds developing in its wake. Onshore flow quickly returns to the area on Monday night and Tuesday.

7 Day Forecast for Marine Location Near Channelview, TX
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location: 29.77, -95.08     debug


Area Discussion for - Houston/Galveston, TX
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Fxus64 khgx 302107
afdhgx
area forecast discussion
national weather service houston/galveston tx
407 pm cdt Thu mar 30 2017

Discussion
After yesterday's storms, mostly sunny skies and light
northwesterly winds greeted the region today. Temperatures as of 3
pm cdt had risen into the mid to upper 70s. With clear skies
continuing tonight in the wake of yesterday's system (now over
missouri), radiational cooling will allow for overnight
temperatures to fall into the mid 50s to mid 60s.

Surface analysis shows a slowly moving cold front dropping south
across oklahoma this afternoon, but the departure of the compact
upper low over missouri will result in loss of mid/upper level
forcing for this feature and keep it well north of southeast texas
overnight. Shortwave ridging will build into the region tonight
behind this departing system, with the main axis amplifying east
of southeast texas on Friday as another system approaches from the
great basin. This amplified upper ridging will promote another
day of dry and mostly sunny conditions on Friday, as well as near
record to record high temperatures possible across much of
southeast texas on Friday. Record high temperatures may be
possible again along the upper texas coast on Saturday.

Upper flow aloft will become increasingly south to southwest on
Saturday as a disturbance shifts from the four corners farther
into new mexico. Unfortunately, there is still considerable
uncertainty regarding the Saturday and Sunday portion of the
forecast as model guidance continues to remain somewhat out of
phase regarding timing and placement of features. A surface low
looks to develop over the panhandles with an attendant dryline
stretching into west central texas as a result, with speed and
moisture convergence across west central texas associated with the
developing surface low encouraging a few isolated showers across
the western counties on Saturday morning. Farther west (across the
permian basin and low rolling plains), diurnal heating along the
dryline looks to result in thunderstorm development... With lift
from the approaching upper level system possibly resulting in
upscale growth into an thunderstorm complex that moves across the
state on Saturday night. This could serve as one round of rainfall
for the region should this complex develop and actually make it
to southeast texas.

Rain chances will increase more on Sunday, however, as the upper
disturbance digs into northern mexico on Sunday and then sweeps
into the region on Sunday night. Precipitable water values surge
to 1.5 to possibly 1.9 by Sunday, increasing concerns for at least
a locally heavy rain as upper divergence associated with the
approaching disturbances promotes the development of numerous to
widespread showers and thunderstorms. Several features are in
place Sunday to confirm the concern for heavy rain and possibly
flooding: a surface reflection/trough and approaching cold front
associated with the upper trough that may help focus rainfall,
high atmospheric moisture content, and rainfall that has been
observed recently (generally across areas south of interstate 10).

However, model solutions from the GFS and european during this
time show that some of the synoptic features necessary for a true
maddox heavy rain event (in this case, how the atmospheric
moisture in the column is aligned) are out of phase... Which
raises concerns on the actual severity of the heavy rain threat.

This is not to downplay the threat for heavy rain as the region
will see rain on Sunday... But the mesoscale appears to be the
bigger driver at this point for the materialization of this threat
in the region. Adding further to the uncertainty to the forecast
for Sunday is the wide spread in forecast rainfall, with SREF 3
hourly QPF plumes advertising a considerable spread anywhere from
0 to 2 inches throughout the day on Sunday. Increasing wind shear
associated with the passage of this system may also promote a
severe weather threat with stronger thunderstorms on Sunday.

Regardless, the passage of this system Sunday night will push a
cold front off the coast and end rain chances for the region at
the beginning of next week. Dry and warm conditions will become
established behind the front through mid-week, but an approaching
front may bring low rain chances back into the forecast by
Wednesday.

Huffman

Marine
North to northwest winds have been coming down this afternoon,
and so have the seas. South winds are still on schedule to come
back to the area later tonight and tomorrow and strengthen
tomorrow night and Saturday when caution flags and/or advisories
will be needed. Increasing chances of showers and thunderstorms
will accompany the moderate to strong onshore flow over the
weekend, and elevated tides might cause some minor impacts over
gulf facing beaches. The next cold front moves off the coast
Sunday night and on into Monday with a moderate to strong offshore
flow expected to develop in its wake. Look for onshore winds to
come back Monday night and Tuesday followed by the area's next
cold frontal passage on Wednesday. 42

Climate
Near record to record high temperatures will be possible across
parts of southeast texas on Friday and Saturday. Record high
temperatures and the years they occurred are listed below.

March 31 records
location record high year
houston intercontinental 88 1946
houston hobby 88 2016
college station 94 1946
galveston 80 1941
april 1 records
location record high year
houston intercontinental 89 1936
houston hobby 89 1974
college station 93 1936
galveston 81 1935

Preliminary point temps/pops
College station (cll) 56 86 64 84 67 / 0 0 10 20 60
houston (iah) 58 87 66 85 70 / 0 0 0 10 60
galveston (gls) 68 81 71 81 72 / 0 0 10 10 50

Hgx watches/warnings/advisories
Tx... None.

Gm... None.

Discussion... 14
aviation/marine... 42


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LYBT2 0 mi45 min W 5.1 G 11 75°F 75°F1007.7 hPa
MGPT2 - 8770613 - Morgans Point, TX 8 mi45 min WNW 5.1 G 6 75°F 75°F1008.7 hPa
NCHT2 - 8770777 - Manchester, TX 10 mi45 min WSW 2.9 G 6 75°F 74°F1008.6 hPa
EPTT2 - 8771013 - Eagle Point, TX 22 mi45 min WNW 2.9 G 4.1 75°F 76°F1008.8 hPa
GRRT2 34 mi45 min WNW 7 G 11 74°F 75°F1009 hPa
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 34 mi45 min S 8.9 G 11
GTOT2 35 mi45 min 71°F 73°F
RLOT2 - 8770971 - Rollover Pass, TX 35 mi45 min WNW 7 G 8.9 73°F 77°F1008.8 hPa
HIST2 39 mi45 min WNW 7 G 8.9 1009 hPa
LUIT2 48 mi45 min NW 8 G 9.9 74°F

Wind History for Morgans Point, TX
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SE2
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G9
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G18
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G25
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G15
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SE14
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G15
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G19
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G17
SE15
G22
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G25
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G33
E4
S8
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NW2
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S10
G13
SE9
G12
SE6
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G11
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G20
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G23
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G24
SE17
G21

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston / Ellington, TX11 mi43 minW 610.00 miFair75°F46°F36%1009.5 hPa
Houston, Houston Hobby Airport, TX13 mi40 minW 710.00 miFair75°F43°F32%1008.8 hPa
John Dunn Helistop, TX17 mi58 minW 610.00 miFair75°F41°F29%1007.8 hPa
Houston, Pearland Regional Airport, TX19 mi40 minW 410.00 miFair76°F45°F33%1009.1 hPa
Houston Intercontinental Airport, TX20 mi40 minWSW 710.00 miFair74°F46°F38%1008.4 hPa

Wind History from EFD (wind in knots)
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Last 24hrCalmS3CalmS3S4NW4--W7NW14NW10NW13NW15N7N8N11N9N9N8NW7NW7NW8NW4W8W6
1 day agoSE18
G23
SE12
G20
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SE16
G26
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G27
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G21
SE13SE12
G19
SE11CalmE3E7E9E13E12S8SE7E6W10W6E4CalmCalm
2 days agoSE8SE7SE4SE4SE4SE3SE4SE5SE3SE6SE6SE4E6SE8SE10SE10SE11SE14SE12E13SE17SE17
G23
SE14
G19
SE14

Tide / Current Tables for Lynchburg Landing, San Jacinto River, Texas
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Lynchburg Landing
Click for Map
Thu -- 05:37 AM CDT     0.13 feet Low Tide
Thu -- 07:11 AM CDT     Sunrise
Thu -- 09:13 AM CDT     Moonrise
Thu -- 01:03 PM CDT     1.27 feet High Tide
Thu -- 06:56 PM CDT     0.90 feet Low Tide
Thu -- 07:37 PM CDT     Sunset
Thu -- 10:39 PM CDT     Moonset
Thu -- 10:45 PM CDT     1.07 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.80.60.40.20.10.10.20.40.60.91.11.21.31.21.21.110.90.90.9111.1

Tide / Current Tables for Barbours Cut, Morgans Point, Galveston Bay, Texas
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Barbours Cut
Click for Map
Thu -- 04:27 AM CDT     0.14 feet Low Tide
Thu -- 07:11 AM CDT     Sunrise
Thu -- 09:13 AM CDT     Moonrise
Thu -- 12:15 PM CDT     1.35 feet High Tide
Thu -- 05:44 PM CDT     1.01 feet Low Tide
Thu -- 07:37 PM CDT     Sunset
Thu -- 09:14 PM CDT     1.11 feet High Tide
Thu -- 10:39 PM CDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80.60.40.20.10.20.30.50.70.91.11.31.31.31.31.21.11111.11.11.11

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of SouthCentralPlains    EDIT
Geos

Wind Forecast for Houston/Galveston, TX (20,4,5,8)
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Ground Weather Radar Station Houston/Galveston, TX
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weather_mapweather_map weather_map

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.