Sunday, August20, 2017 L-36.com


Marine Weather and Tides
Houston, 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 6:51AMSunset 7:57PM Sunday August 20, 2017 6:40 AM CDT (11:40 UTC) Moonrise 4:35AMMoonset 6:19PM Illumination 3% Phase: Waning Crescent; Moon at 28 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
GMZ335 Galveston Bay- 342 Am Cdt Sun Aug 20 2017
Today..North winds around 5 knots becoming southeast in the afternoon. Bay waters smooth. A slight chance of showers and isolated Thunderstorms in the morning. A chance of showers and Thunderstorms in the afternoon.
Tonight..Southeast winds 5 to 10 knots. Bay waters smooth.
Monday..Southeast winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms.
Monday night..Southeast winds 5 to 10 knots. Bay waters smooth.
Tuesday..Southeast winds 5 to 10 knots. Bay waters smooth. A chance of showers and Thunderstorms in the morning, then a slight chance of showers and Thunderstorms in the afternoon.
Tuesday night..Southeast winds 5 to 10 knots becoming south after midnight. Bay waters smooth.
Wednesday..North winds around 5 knots becoming southeast in the afternoon. Bay waters smooth. A chance of showers and Thunderstorms.
Wednesday night..South winds 5 to 10 knots becoming west after midnight. Bay waters smooth. A slight chance of showers and Thunderstorms.
Thursday..Northwest winds around 5 knots becoming northeast in the afternoon. Bay waters smooth. A chance of showers and Thunderstorms.
Thursday night..East winds 5 to 10 knots. Bay waters smooth. 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 342 Am Cdt Sun Aug 20 2017
Synopsis for high island to matagorda ship channel out 60 nm.. The region of surface high pressure that was located over the northwestern gulf of mexico will begin to move northeastward Sunday, and better coverage for showers and Thunderstorms can be expected through mid week. Elevated seas and gusty winds will be possible below stronger storms. Light winds should remain out of the south to southeast with lower seas throughout much of the week.

7 Day Forecast for Marine Location Near Houston, TX
   Hourly   EDIT   Help
location: 29.74, -95.33     debug


Area Discussion for - Houston/Galveston, TX
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus64 khgx 200945
afdhgx
area forecast discussion
national weather service houston galveston tx
445 am cdt Sun aug 20 2017

Discussion
After my awips2 cave session crashed with my completed afd wiped
out before sending, here's an abbreviated version of what I can
remember I wrote...

goes 16 fog imagery has been picking up on some patchy fog mainly
west and southwest of houston. Visibility has been ranging from
1sm to 6sm at most sites with klbx varying the most which is
driving our aviation forecaster insane. The insanity should stop
later this morning once winds start to mix which won't be that
much since there is hardly a pressure gradient.

Upper level pattern looks to be quasi-zonal across the northern
tier of states with a trough over the great lakes or new england
states. Pesky tutt now in the E gulf west of florida as seen in
water vapor imagery. GOES 16 derived pw imagery shows a plume of 2
inch pw off the coast of la. Nam GFS show enough 925-700 mb flow
to advect this higher moisture over SE texas by this evening. This
along with the sea breeze should support a few showers and storms
this afternoon with most activity east of i-45.

Monday to Wednesday there is really not a lot of change as the
tutt moves over the NW gulf lowering heights and allowing for
scattered showers and storms given the higher moisture. Forecast
will keep 30-40 pop for Monday Tuesday. Wednesday will go with 30
pops as a frontal boundary begins to slide south from N tx. It
gets a boost from a short wave trough diving through the great
lakes on Thursday. Front should stall inland in line with the
gfs ECMWF solutions. Front should maintain 30-40 pop for the rest
of the week. Upper ridge builds next weekend so could see a drying
trend from the rainfall potential.

Bottom line at the bottom... Will I be able to view the solar
eclipse on Monday? On the bright side we are not forecasting
overcast skies. But there is still the potential for
scattered broken cloud decks to form due to developing convection
late morning into the early afternoon when viewing the eclipse.

Areas north of houston will have the best viewing probabilities
but those chances will be less south of houston where convection
may be developing.

Overpeck

Tropics
In short, TS harvey died a horrible death. After last night's
convective burst, it looked like harvey could hold on, but some
drier air and shear got the better of it as can happen in the
caribbean. It sill could make a comeback as it nears the nw
caribbean. The problem is that the system could interact with land
quite a bit before emerging in the bay of campeche. If it
survives that interaction, then it will only have a little time to
organize before moving into mexico again. Still something to
monitor over the next few days.

Overpeck

Marine
Currently, fairly light and variable winds across SE tx. By
sunrise, the wind direction should be out of the SW prior to the
passage of the seabreeze Sunday afternoon, then becoming more
southeasterly. Sea heights currently between 1-2 feet will also
rise to 2-3 feet early next week. The area of surface high
pressure will begin to weaken and shift further northeastward
throughout the day Sunday, allowing for a rise in moisture
migrating in from the southeast. With precipitable waters on the
rise tomorrow, expecting better coverage of showers and
thunderstorms originally building mostly over the nearshore waters
early morning before pushing onshore. Brief elevated seas and
gusty winds can be expected beneath stronger storms. Additionally,
an area of disturbed weather associated with a region of low
pressure will also help to increase our chances for shower and
thunderstorm coverage Sunday through mid-week. Drier conditions
should prevail late week as high pressure begins to build back
into the region, with winds out of the southeast and seas again
lowering to 1-2 feet.

No big changes in the tides evening. Tides are still running
around normal to only slightly above normal by less than a half
foot.

Hathaway

Preliminary point temps pops
College station (cll) 99 76 98 75 98 10 10 20 10 20
houston (iah) 97 78 94 77 94 20 10 40 10 40
galveston (gls) 93 82 91 82 91 20 10 40 10 30

Hgx watches warnings advisories
Tx... None.

Gm... None.

Discussion... 39
aviation marine... 08


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NCHT2 - 8770777 - Manchester, TX 4 mi41 min WSW 1 G 2.9 82°F 85°F1014.2 hPa (-0.0)
LYBT2 13 mi41 min SSE 1.9 G 1.9 82°F 87°F1015.2 hPa (+0.3)
MGPT2 - 8770613 - Morgans Point, TX 19 mi41 min Calm G 1 82°F 87°F1015.1 hPa (+0.4)
EPTT2 - 8771013 - Eagle Point, TX 28 mi41 min NW 1.9 G 1.9 81°F 89°F1015.1 hPa (+0.3)
GRRT2 38 mi41 min NW 2.9 G 2.9 80°F 89°F1015.1 hPa (+0.6)
GTOT2 41 mi41 min 83°F 89°F
GNJT2 - 8771341 - Galveston Bay (North Jetty), TX 42 mi41 min Calm G 1 87°F1014.6 hPa (+0.5)
RLOT2 - 8770971 - Rollover Pass, TX 46 mi41 min WSW 1.9 G 2.9 83°F 85°F1015.2 hPa (+0.4)
LUIT2 47 mi41 min N 1.9 G 2.9 82°F 87°F

Wind History for Morgans Point, TX
(wind in knots)    EDIT      (on/off)   Help
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
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
Last
24hr
NW3
W3
SW5
SW7
S5
W1
G5
SE4
NE6
SE5
G8
SE4
G8
SE6
G9
SE6
G11
SE6
G11
S8
S7
G11
S6
G10
S7
SW4
G7
SW3
SW4
SW4
SW4
SW1
--
1 day
ago
SW3
SW3
W4
SW6
G9
NW4
G8
S3
G7
SE3
SE6
G11
SE7
G11
SE10
SE6
G9
SE9
G12
SE9
S9
G12
S9
G12
S7
G11
S9
G13
S7
SW6
SW4
G7
SW3
SW3
SW3
SW4
2 days
ago
SW5
G8
SW5
G8
S6
G9
SW5
G9
SW6
G9
S6
G10
SE4
G9
SE4
G10
SE9
G13
SE10
G15
SE9
G14
S11
G17
S9
G15
S9
G12
S7
G12
S7
S5
G8
S6
SW4
G7
S5
G8
S7
G10
SW4
SW3
S3

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Houston, Houston Hobby Airport, TX7 mi48 minN 010.00 miA Few Clouds80°F75°F85%1015.1 hPa
Houston / Ellington, TX12 mi1.8 hrsN 010.00 miA Few Clouds81°F75°F84%1015.2 hPa
Houston Intercontinental Airport, TX16 mi48 minN 010.00 miA Few Clouds77°F75°F94%1014.8 hPa
Houston, Pearland Regional Airport, TX16 mi48 minN 010.00 miFair79°F73°F85%1015.2 hPa
Houston Southwest Airport, TX18 mi66 minN 010.00 miFair73°F71°F96%1015.2 hPa
Houston, Sugar Land Municipal / Hull Field Airport, TX19 mi48 minN 010.00 miFair78°F75°F93%1014.8 hPa

Wind History from MCJ (wind in knots)
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
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
Last 24hrSE10
G14
S6S7CalmSW5SW6SW7SW5S8S5SW3S8
G14
SW5S7SW7
G14
S8
G14
SW8S6S6S6
G14
S5CalmS5Calm
1 day agoS6S8S7S5S6S5S4S6SE9S7S5
G15
S6
G16
W4
G15
SW10
G16
S10
G18
S10
G17
S9
G21
S13
G21
S15
G20
S14
G20
S8S6
G14
S9
G14
SE9
2 days agoSE6S3S5S7S3SW3SW3SW7S5SW8
G14
SW10
G19
SW4SW5S5CalmS6
G16
S6S12
G17
SE12
G17
S7
G16
S9S8S6S6

Tide / Current Tables for Houston Ship Channel, Galveston Bay, Manchester, Texas
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Houston Ship Channel
Click for Map
Sun -- 02:36 AM CDT     -0.25 feet Low Tide
Sun -- 05:35 AM CDT     Moonrise
Sun -- 06:51 AM CDT     Sunrise
Sun -- 10:44 AM CDT     1.46 feet High Tide
Sun -- 03:45 PM CDT     1.17 feet Low Tide
Sun -- 07:12 PM CDT     1.33 feet High Tide
Sun -- 07:18 PM CDT     Moonset
Sun -- 07:56 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.1-0.1-0.2-0.2-0.10.20.50.81.11.31.41.51.41.31.31.21.21.21.31.31.31.210.7

Tide / Current Tables for San Jacinto Battleground State Historic Site, Texas
   EDIT      (on/off)   Help   One Week of Data
San Jacinto Battleground State Historic Site
Click for Map
Sun -- 02:20 AM CDT     0.14 feet Low Tide
Sun -- 05:34 AM CDT     Moonrise
Sun -- 06:51 AM CDT     Sunrise
Sun -- 10:51 AM CDT     1.77 feet High Tide
Sun -- 03:43 PM CDT     1.50 feet Low Tide
Sun -- 06:42 PM CDT     1.57 feet High Tide
Sun -- 07:17 PM CDT     Moonset
Sun -- 07:55 PM CDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.30.20.20.30.60.91.21.51.71.81.81.71.71.61.51.51.51.61.61.51.41.21

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 Houston/Galveston, TX (7,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Houston/Galveston, TX
   (on/off)   Help
weather_mapweather_map weather_map

Gulf Stream Current


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.